.NET: Add Cosmos DB implementations for ChatMessageStore and CheckpointStore. (#1838)

* draft commit

* Added Cosmos agent thread and tests

* revert unnecessary changes and fix tests

* add multi-tenant support with hierarchical partition keys (and tests).

* enhance transactional batch

* address review comments

* Address PR review comments from @westey-m

* Merge upstream/main - resolve slnx conflicts

* use param validation helpers

* Replace useManagedIdentity boolean with TokenCredential parameter

* Remove redundant suppressions and fix tests

* Rename project from Microsoft.Agents.AI.Abstractions.CosmosNoSql to Microsoft.Agents.AI.CosmosNoSql

* Refactor constructors to use chaining pattern

* Reorder deserialization constructor parameters for consistency

* Remove database/container IDs from serialized state

* Remove auto-generation of MessageId

* Optimize AddMessagesAsync to avoid enumeration when possible

* Add MaxMessagesToRetrieve to limit context window

* Make Role nullable instead of defaulting

* Fix net472 build without rebasing 19 commits

* Add Cosmos DB emulator to CI workflow

* Fix Cosmos DB emulator tests: use Skip.If instead of Assert.Fail and start emulator before unit tests

* Replace Skip.If() with conditional return to fix compilation

* Use env var to skip Cosmos tests on non-Windows CI

* Add Xunit.SkippableFact package to properly skip Cosmos tests on Linux

* Change [Fact] to [SkippableFact] for proper test skipping behavior

* Remove stale Microsoft.Agents.AI.Abstractions.CosmosNoSql directory

* Fix code formatting: add braces, this. qualifications, and final newlines

* Fix file encoding to UTF-8 with BOM, fix import ordering, and remove unnecessary using directives

* Convert backing fields to auto-properties and remove Azure.Identity using directive

* Fix CosmosChatMessageStore.cs encoding back to UTF-8 with BOM

* Fix test file formatting: indentation, encoding, imports, this. qualifications, naming conventions, and simplify new expressions

* Fix const field naming violations: Remove s_ prefix from const fields and add this. qualification to Dispose call

* Add local .editorconfig for Cosmos DB tests to suppress IDE0005 false positives from multi-targeting

* Fix IDE1006 naming violations: Rename TestDatabaseId to s_testDatabaseId and add final newlines

* Address PR review comments

Address Wesley's review comments:

- Remove Cosmos DB package references from core projects

- Delete duplicate test files from old package structure

- Remove redundant parameter validation from extension methods

Address Kiran's review comments:

- Remove redundant 429 retry logic (SDK handles automatically)

- Add explicit RequestEntityTooLarge error handling

- Remove dead code in GetMessageCountAsync

- Add defensive partition key validation comments

* Fix IDE0001 formatting error in AgentProviderExtensions.cs. Use type alias to resolve namespace conflict between Azure.AI.Agents.Persistent.RunStatus and Microsoft.Agents.AI.Workflows.RunStatus. This eliminates the need for global:: qualifier which triggered the formatter warning.

* Update package versions for Aspire 13.0.0 compatibility

* Fix TargetFrameworks in Cosmos DB projects

- Replace  with  which is defined in Directory.Build.props
- Fix package reference from System.Linq.Async to System.Linq.AsyncEnumerable to match Directory.Packages.props

* Remove redundant counter, add partition key validation, use factory pattern for deserialization
This commit is contained in:
Theo van Kraay
2025-11-26 04:36:27 -08:00
committed by GitHub
Unverified
parent 907d79ab3c
commit a57b37d5fa
13 changed files with 2610 additions and 0 deletions
@@ -124,6 +124,16 @@ jobs:
popd
rm -rf "$TEMP_DIR"
# Start Cosmos DB Emulator for Cosmos-based unit tests (only on Windows)
- name: Start Azure Cosmos DB Emulator
if: runner.os == 'Windows'
shell: pwsh
run: |
Write-Host "Launching Azure Cosmos DB Emulator"
Import-Module "$env:ProgramFiles\Azure Cosmos DB Emulator\PSModules\Microsoft.Azure.CosmosDB.Emulator"
Start-CosmosDbEmulator -NoUI -Key "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw=="
echo "COSMOS_EMULATOR_AVAILABLE=true" >> $env:GITHUB_ENV
- name: Run Unit Tests
shell: bash
run: |
@@ -143,6 +153,10 @@ jobs:
echo "Skipping $project - does not support target framework ${{ matrix.targetFramework }} (supports: $target_frameworks)"
fi
done
env:
# Cosmos DB Emulator connection settings
COSMOSDB_ENDPOINT: https://localhost:8081
COSMOSDB_KEY: C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==
- name: Log event name and matrix integration-tests
shell: bash
@@ -181,6 +195,9 @@ jobs:
fi
done
env:
# Cosmos DB Emulator connection settings
COSMOSDB_ENDPOINT: https://localhost:8081
COSMOSDB_KEY: C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==
# OpenAI Models
OpenAI__ApiKey: ${{ secrets.OPENAI__APIKEY }}
OpenAI__ChatModelId: ${{ vars.OPENAI__CHATMODELID }}
+5
View File
@@ -25,6 +25,10 @@
<PackageVersion Include="Azure.AI.OpenAI" Version="2.5.0-beta.1" />
<PackageVersion Include="Azure.Identity" Version="1.17.0" />
<PackageVersion Include="Azure.Monitor.OpenTelemetry.Exporter" Version="1.4.0" />
<!-- Microsoft.Azure.* -->
<PackageVersion Include="Microsoft.Azure.Cosmos" Version="3.54.0" />
<!-- Newtonsoft.Json -->
<PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
<!-- System.* -->
<PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.0" />
<PackageVersion Include="Microsoft.Bcl.HashCode" Version="6.0.0" />
@@ -129,6 +133,7 @@
<PackageVersion Include="xunit" Version="2.9.3" />
<PackageVersion Include="xunit.abstractions" Version="2.0.3" />
<PackageVersion Include="xunit.runner.visualstudio" Version="3.1.3" />
<PackageVersion Include="Xunit.SkippableFact" Version="1.5.23" />
<PackageVersion Include="xretry" Version="1.9.0" />
<PackageVersion Include="coverlet.collector" Version="6.0.4" />
<!-- Symbols -->
+2
View File
@@ -343,6 +343,7 @@
<Folder Name="/src/">
<Project Path="src/Microsoft.Agents.AI.A2A/Microsoft.Agents.AI.A2A.csproj" />
<Project Path="src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj" />
<Project Path="src/Microsoft.Agents.AI.CosmosNoSql/Microsoft.Agents.AI.CosmosNoSql.csproj" />
<Project Path="src/Microsoft.Agents.AI.AGUI/Microsoft.Agents.AI.AGUI.csproj" />
<Project Path="src/Microsoft.Agents.AI.Anthropic/Microsoft.Agents.AI.Anthropic.csproj" />
<Project Path="src/Microsoft.Agents.AI.AzureAI.Persistent/Microsoft.Agents.AI.AzureAI.Persistent.csproj" />
@@ -383,6 +384,7 @@
<Folder Name="/Tests/UnitTests/">
<Project Path="tests/Microsoft.Agents.AI.A2A.UnitTests/Microsoft.Agents.AI.A2A.UnitTests.csproj" />
<Project Path="tests/Microsoft.Agents.AI.Abstractions.UnitTests/Microsoft.Agents.AI.Abstractions.UnitTests.csproj" />
<Project Path="tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/Microsoft.Agents.AI.CosmosNoSql.UnitTests.csproj" />
<Project Path="tests/Microsoft.Agents.AI.AGUI.UnitTests/Microsoft.Agents.AI.AGUI.UnitTests.csproj" />
<Project Path="tests/Microsoft.Agents.AI.Anthropic.UnitTests/Microsoft.Agents.AI.Anthropic.UnitTests.csproj" />
<Project Path="tests/Microsoft.Agents.AI.AzureAI.Persistent.UnitTests/Microsoft.Agents.AI.AzureAI.Persistent.UnitTests.csproj" />
@@ -0,0 +1,688 @@
// Copyright (c) Microsoft. All rights reserved.
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using Azure.Core;
using Microsoft.Azure.Cosmos;
using Microsoft.Extensions.AI;
using Microsoft.Shared.Diagnostics;
namespace Microsoft.Agents.AI;
/// <summary>
/// Provides a Cosmos DB implementation of the <see cref="ChatMessageStore"/> abstract class.
/// </summary>
[RequiresUnreferencedCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with NativeAOT.")]
public sealed class CosmosChatMessageStore : ChatMessageStore, IDisposable
{
private readonly CosmosClient _cosmosClient;
private readonly Container _container;
private readonly bool _ownsClient;
private bool _disposed;
// Hierarchical partition key support
private readonly string? _tenantId;
private readonly string? _userId;
private readonly PartitionKey _partitionKey;
private readonly bool _useHierarchicalPartitioning;
/// <summary>
/// Cached JSON serializer options for .NET 9.0 compatibility.
/// </summary>
private static readonly JsonSerializerOptions s_defaultJsonOptions = CreateDefaultJsonOptions();
private static JsonSerializerOptions CreateDefaultJsonOptions()
{
var options = new JsonSerializerOptions();
#if NET9_0_OR_GREATER
// Configure TypeInfoResolver for .NET 9.0 to enable JSON serialization
options.TypeInfoResolver = new System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver();
#endif
return options;
}
/// <summary>
/// Gets or sets the maximum number of messages to return in a single query batch.
/// Default is 100 for optimal performance.
/// </summary>
public int MaxItemCount { get; set; } = 100;
/// <summary>
/// Gets or sets the maximum number of items per transactional batch operation.
/// Default is 100, maximum allowed by Cosmos DB is 100.
/// </summary>
public int MaxBatchSize { get; set; } = 100;
/// <summary>
/// Gets or sets the maximum number of messages to retrieve from the store.
/// This helps prevent exceeding LLM context windows in long conversations.
/// Default is null (no limit). When set, only the most recent messages are returned.
/// </summary>
public int? MaxMessagesToRetrieve { get; set; }
/// <summary>
/// Gets or sets the Time-To-Live (TTL) in seconds for messages.
/// Default is 86400 seconds (24 hours). Set to null to disable TTL.
/// </summary>
public int? MessageTtlSeconds { get; set; } = 86400;
/// <summary>
/// Gets the conversation ID associated with this message store.
/// </summary>
public string ConversationId { get; init; }
/// <summary>
/// Gets the database ID associated with this message store.
/// </summary>
public string DatabaseId { get; init; }
/// <summary>
/// Gets the container ID associated with this message store.
/// </summary>
public string ContainerId { get; init; }
/// <summary>
/// Internal primary constructor used by all public constructors.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="conversationId">The unique identifier for this conversation thread.</param>
/// <param name="ownsClient">Whether this instance owns the CosmosClient and should dispose it.</param>
/// <param name="tenantId">Optional tenant identifier for hierarchical partitioning.</param>
/// <param name="userId">Optional user identifier for hierarchical partitioning.</param>
internal CosmosChatMessageStore(CosmosClient cosmosClient, string databaseId, string containerId, string conversationId, bool ownsClient, string? tenantId = null, string? userId = null)
{
this._cosmosClient = Throw.IfNull(cosmosClient);
this._container = this._cosmosClient.GetContainer(Throw.IfNullOrWhitespace(databaseId), Throw.IfNullOrWhitespace(containerId));
this.ConversationId = Throw.IfNullOrWhitespace(conversationId);
this.DatabaseId = databaseId;
this.ContainerId = containerId;
this._ownsClient = ownsClient;
// Initialize partitioning mode
this._tenantId = tenantId;
this._userId = userId;
this._useHierarchicalPartitioning = tenantId != null && userId != null;
this._partitionKey = this._useHierarchicalPartitioning
? new PartitionKeyBuilder()
.Add(tenantId!)
.Add(userId!)
.Add(conversationId)
.Build()
: new PartitionKey(conversationId);
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using a connection string.
/// </summary>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(string connectionString, string databaseId, string containerId)
: this(connectionString, databaseId, containerId, Guid.NewGuid().ToString("N"))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using a connection string.
/// </summary>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="conversationId">The unique identifier for this conversation thread.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(string connectionString, string databaseId, string containerId, string conversationId)
: this(new CosmosClient(Throw.IfNullOrWhitespace(connectionString)), databaseId, containerId, conversationId, ownsClient: true)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using TokenCredential for authentication.
/// </summary>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="tokenCredential">The TokenCredential to use for authentication (e.g., DefaultAzureCredential, ManagedIdentityCredential).</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(string accountEndpoint, TokenCredential tokenCredential, string databaseId, string containerId)
: this(accountEndpoint, tokenCredential, databaseId, containerId, Guid.NewGuid().ToString("N"))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using a TokenCredential for authentication.
/// </summary>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="tokenCredential">The TokenCredential to use for authentication (e.g., DefaultAzureCredential, ManagedIdentityCredential).</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="conversationId">The unique identifier for this conversation thread.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(string accountEndpoint, TokenCredential tokenCredential, string databaseId, string containerId, string conversationId)
: this(new CosmosClient(Throw.IfNullOrWhitespace(accountEndpoint), Throw.IfNull(tokenCredential)), databaseId, containerId, conversationId, ownsClient: true)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using an existing <see cref="CosmosClient"/>.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="cosmosClient"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(CosmosClient cosmosClient, string databaseId, string containerId)
: this(cosmosClient, databaseId, containerId, Guid.NewGuid().ToString("N"))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using an existing <see cref="CosmosClient"/>.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="conversationId">The unique identifier for this conversation thread.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="cosmosClient"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(CosmosClient cosmosClient, string databaseId, string containerId, string conversationId)
: this(cosmosClient, databaseId, containerId, conversationId, ownsClient: false)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using a connection string with hierarchical partition keys.
/// </summary>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="tenantId">The tenant identifier for hierarchical partitioning.</param>
/// <param name="userId">The user identifier for hierarchical partitioning.</param>
/// <param name="sessionId">The session identifier for hierarchical partitioning.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(string connectionString, string databaseId, string containerId, string tenantId, string userId, string sessionId)
: this(new CosmosClient(Throw.IfNullOrWhitespace(connectionString)), databaseId, containerId, Throw.IfNullOrWhitespace(sessionId), ownsClient: true, Throw.IfNullOrWhitespace(tenantId), Throw.IfNullOrWhitespace(userId))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using a TokenCredential for authentication with hierarchical partition keys.
/// </summary>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="tokenCredential">The TokenCredential to use for authentication (e.g., DefaultAzureCredential, ManagedIdentityCredential).</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="tenantId">The tenant identifier for hierarchical partitioning.</param>
/// <param name="userId">The user identifier for hierarchical partitioning.</param>
/// <param name="sessionId">The session identifier for hierarchical partitioning.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(string accountEndpoint, TokenCredential tokenCredential, string databaseId, string containerId, string tenantId, string userId, string sessionId)
: this(new CosmosClient(Throw.IfNullOrWhitespace(accountEndpoint), Throw.IfNull(tokenCredential)), databaseId, containerId, Throw.IfNullOrWhitespace(sessionId), ownsClient: true, Throw.IfNullOrWhitespace(tenantId), Throw.IfNullOrWhitespace(userId))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosChatMessageStore"/> class using an existing <see cref="CosmosClient"/> with hierarchical partition keys.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="tenantId">The tenant identifier for hierarchical partitioning.</param>
/// <param name="userId">The user identifier for hierarchical partitioning.</param>
/// <param name="sessionId">The session identifier for hierarchical partitioning.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="cosmosClient"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosChatMessageStore(CosmosClient cosmosClient, string databaseId, string containerId, string tenantId, string userId, string sessionId)
: this(cosmosClient, databaseId, containerId, Throw.IfNullOrWhitespace(sessionId), ownsClient: false, Throw.IfNullOrWhitespace(tenantId), Throw.IfNullOrWhitespace(userId))
{
}
/// <summary>
/// Creates a new instance of the <see cref="CosmosChatMessageStore"/> class from previously serialized state.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="serializedStoreState">A <see cref="JsonElement"/> representing the serialized state of the message store.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <param name="jsonSerializerOptions">Optional settings for customizing the JSON deserialization process.</param>
/// <returns>A new instance of <see cref="CosmosChatMessageStore"/> initialized from the serialized state.</returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="cosmosClient"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when the serialized state cannot be deserialized.</exception>
public static CosmosChatMessageStore CreateFromSerializedState(CosmosClient cosmosClient, JsonElement serializedStoreState, string databaseId, string containerId, JsonSerializerOptions? jsonSerializerOptions = null)
{
Throw.IfNull(cosmosClient);
Throw.IfNullOrWhitespace(databaseId);
Throw.IfNullOrWhitespace(containerId);
if (serializedStoreState.ValueKind is not JsonValueKind.Object)
{
throw new ArgumentException("Invalid serialized state", nameof(serializedStoreState));
}
var state = JsonSerializer.Deserialize<StoreState>(serializedStoreState, jsonSerializerOptions);
if (state?.ConversationIdentifier is not { } conversationId)
{
throw new ArgumentException("Invalid serialized state", nameof(serializedStoreState));
}
// Use the internal constructor with all parameters to ensure partition key logic is centralized
return state.UseHierarchicalPartitioning && state.TenantId != null && state.UserId != null
? new CosmosChatMessageStore(cosmosClient, databaseId, containerId, conversationId, ownsClient: false, state.TenantId, state.UserId)
: new CosmosChatMessageStore(cosmosClient, databaseId, containerId, conversationId, ownsClient: false);
}
/// <inheritdoc />
public override async Task<IEnumerable<ChatMessage>> GetMessagesAsync(CancellationToken cancellationToken = default)
{
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
// Fetch most recent messages in descending order when limit is set, then reverse to ascending
var orderDirection = this.MaxMessagesToRetrieve.HasValue ? "DESC" : "ASC";
var query = new QueryDefinition($"SELECT * FROM c WHERE c.conversationId = @conversationId AND c.type = @type ORDER BY c.timestamp {orderDirection}")
.WithParameter("@conversationId", this.ConversationId)
.WithParameter("@type", "ChatMessage");
var iterator = this._container.GetItemQueryIterator<CosmosMessageDocument>(query, requestOptions: new QueryRequestOptions
{
PartitionKey = this._partitionKey,
MaxItemCount = this.MaxItemCount // Configurable query performance
});
var messages = new List<ChatMessage>();
while (iterator.HasMoreResults)
{
var response = await iterator.ReadNextAsync(cancellationToken).ConfigureAwait(false);
foreach (var document in response)
{
if (this.MaxMessagesToRetrieve.HasValue && messages.Count >= this.MaxMessagesToRetrieve.Value)
{
break;
}
if (!string.IsNullOrEmpty(document.Message))
{
var message = JsonSerializer.Deserialize<ChatMessage>(document.Message, s_defaultJsonOptions);
if (message != null)
{
messages.Add(message);
}
}
}
if (this.MaxMessagesToRetrieve.HasValue && messages.Count >= this.MaxMessagesToRetrieve.Value)
{
break;
}
}
// If we fetched in descending order (most recent first), reverse to ascending order
if (this.MaxMessagesToRetrieve.HasValue)
{
messages.Reverse();
}
return messages;
}
/// <inheritdoc />
public override async Task AddMessagesAsync(IEnumerable<ChatMessage> messages, CancellationToken cancellationToken = default)
{
if (messages is null)
{
throw new ArgumentNullException(nameof(messages));
}
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
var messageList = messages as IReadOnlyCollection<ChatMessage> ?? messages.ToList();
if (messageList.Count == 0)
{
return;
}
// Use transactional batch for atomic operations
if (messageList.Count > 1)
{
await this.AddMessagesInBatchAsync(messageList, cancellationToken).ConfigureAwait(false);
}
else
{
await this.AddSingleMessageAsync(messageList.First(), cancellationToken).ConfigureAwait(false);
}
}
/// <summary>
/// Adds multiple messages using transactional batch operations for atomicity.
/// </summary>
private async Task AddMessagesInBatchAsync(IReadOnlyCollection<ChatMessage> messages, CancellationToken cancellationToken)
{
var currentTimestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
// Process messages in optimal batch sizes
for (int i = 0; i < messages.Count; i += this.MaxBatchSize)
{
var batchMessages = messages.Skip(i).Take(this.MaxBatchSize).ToList();
await this.ExecuteBatchOperationAsync(batchMessages, currentTimestamp, cancellationToken).ConfigureAwait(false);
}
}
/// <summary>
/// Executes a single batch operation with enhanced error handling.
/// Cosmos SDK handles throttling (429) retries automatically.
/// </summary>
private async Task ExecuteBatchOperationAsync(List<ChatMessage> messages, long timestamp, CancellationToken cancellationToken)
{
// Create all documents upfront for validation and batch operation
var documents = new List<CosmosMessageDocument>(messages.Count);
foreach (var message in messages)
{
documents.Add(this.CreateMessageDocument(message, timestamp));
}
// Defensive check: Verify all messages share the same partition key values
// In hierarchical partitioning, this means same tenantId, userId, and sessionId
// In simple partitioning, this means same conversationId
if (documents.Count > 0)
{
if (this._useHierarchicalPartitioning)
{
// Verify all documents have matching hierarchical partition key components
var firstDoc = documents[0];
if (!documents.All(d => d.TenantId == firstDoc.TenantId && d.UserId == firstDoc.UserId && d.SessionId == firstDoc.SessionId))
{
throw new InvalidOperationException("All messages in a batch must share the same partition key values (tenantId, userId, sessionId).");
}
}
else
{
// Verify all documents have matching conversationId
var firstConversationId = documents[0].ConversationId;
if (!documents.All(d => d.ConversationId == firstConversationId))
{
throw new InvalidOperationException("All messages in a batch must share the same partition key value (conversationId).");
}
}
}
// All messages in this store share the same partition key by design
// Transactional batches require all items to share the same partition key
var batch = this._container.CreateTransactionalBatch(this._partitionKey);
foreach (var document in documents)
{
batch.CreateItem(document);
}
try
{
var response = await batch.ExecuteAsync(cancellationToken).ConfigureAwait(false);
if (!response.IsSuccessStatusCode)
{
throw new InvalidOperationException($"Batch operation failed with status: {response.StatusCode}. Details: {response.ErrorMessage}");
}
}
catch (CosmosException ex) when (ex.StatusCode == System.Net.HttpStatusCode.RequestEntityTooLarge)
{
// If batch is too large, split into smaller batches
if (messages.Count == 1)
{
// Can't split further, use single operation
await this.AddSingleMessageAsync(messages[0], cancellationToken).ConfigureAwait(false);
return;
}
// Split the batch in half and retry
var midpoint = messages.Count / 2;
var firstHalf = messages.Take(midpoint).ToList();
var secondHalf = messages.Skip(midpoint).ToList();
await this.ExecuteBatchOperationAsync(firstHalf, timestamp, cancellationToken).ConfigureAwait(false);
await this.ExecuteBatchOperationAsync(secondHalf, timestamp, cancellationToken).ConfigureAwait(false);
}
}
/// <summary>
/// Adds a single message to the store.
/// </summary>
private async Task AddSingleMessageAsync(ChatMessage message, CancellationToken cancellationToken)
{
var document = this.CreateMessageDocument(message, DateTimeOffset.UtcNow.ToUnixTimeSeconds());
try
{
await this._container.CreateItemAsync(document, this._partitionKey, cancellationToken: cancellationToken).ConfigureAwait(false);
}
catch (CosmosException ex) when (ex.StatusCode == System.Net.HttpStatusCode.RequestEntityTooLarge)
{
throw new InvalidOperationException(
"Message exceeds Cosmos DB's maximum item size limit of 2MB. " +
"Message ID: " + message.MessageId + ", Serialized size is too large. " +
"Consider reducing message content or splitting into smaller messages.",
ex);
}
}
/// <summary>
/// Creates a message document with enhanced metadata.
/// </summary>
private CosmosMessageDocument CreateMessageDocument(ChatMessage message, long timestamp)
{
return new CosmosMessageDocument
{
Id = Guid.NewGuid().ToString(),
ConversationId = this.ConversationId,
Timestamp = timestamp,
MessageId = message.MessageId,
Role = message.Role.Value,
Message = JsonSerializer.Serialize(message, s_defaultJsonOptions),
Type = "ChatMessage", // Type discriminator
Ttl = this.MessageTtlSeconds, // Configurable TTL
// Include hierarchical metadata when using hierarchical partitioning
TenantId = this._useHierarchicalPartitioning ? this._tenantId : null,
UserId = this._useHierarchicalPartitioning ? this._userId : null,
SessionId = this._useHierarchicalPartitioning ? this.ConversationId : null
};
}
/// <inheritdoc />
public override JsonElement Serialize(JsonSerializerOptions? jsonSerializerOptions = null)
{
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
var state = new StoreState
{
ConversationIdentifier = this.ConversationId,
TenantId = this._tenantId,
UserId = this._userId,
UseHierarchicalPartitioning = this._useHierarchicalPartitioning
};
var options = jsonSerializerOptions ?? s_defaultJsonOptions;
return JsonSerializer.SerializeToElement(state, options);
}
/// <summary>
/// Gets the count of messages in this conversation.
/// This is an additional utility method beyond the base contract.
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The number of messages in the conversation.</returns>
public async Task<int> GetMessageCountAsync(CancellationToken cancellationToken = default)
{
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
// Efficient count query
var query = new QueryDefinition("SELECT VALUE COUNT(1) FROM c WHERE c.conversationId = @conversationId AND c.Type = @type")
.WithParameter("@conversationId", this.ConversationId)
.WithParameter("@type", "ChatMessage");
var iterator = this._container.GetItemQueryIterator<int>(query, requestOptions: new QueryRequestOptions
{
PartitionKey = this._partitionKey
});
// COUNT queries always return a result
var response = await iterator.ReadNextAsync(cancellationToken).ConfigureAwait(false);
return response.FirstOrDefault();
}
/// <summary>
/// Deletes all messages in this conversation.
/// This is an additional utility method beyond the base contract.
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The number of messages deleted.</returns>
public async Task<int> ClearMessagesAsync(CancellationToken cancellationToken = default)
{
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
// Batch delete for efficiency
var query = new QueryDefinition("SELECT VALUE c.id FROM c WHERE c.conversationId = @conversationId AND c.Type = @type")
.WithParameter("@conversationId", this.ConversationId)
.WithParameter("@type", "ChatMessage");
var iterator = this._container.GetItemQueryIterator<string>(query, requestOptions: new QueryRequestOptions
{
PartitionKey = this._partitionKey,
MaxItemCount = this.MaxItemCount
});
var deletedCount = 0;
while (iterator.HasMoreResults)
{
var response = await iterator.ReadNextAsync(cancellationToken).ConfigureAwait(false);
var batch = this._container.CreateTransactionalBatch(this._partitionKey);
var batchItemCount = 0;
foreach (var itemId in response)
{
if (!string.IsNullOrEmpty(itemId))
{
batch.DeleteItem(itemId);
batchItemCount++;
deletedCount++;
}
}
if (batchItemCount > 0)
{
await batch.ExecuteAsync(cancellationToken).ConfigureAwait(false);
}
}
return deletedCount;
}
/// <inheritdoc />
public void Dispose()
{
if (!this._disposed)
{
if (this._ownsClient)
{
this._cosmosClient?.Dispose();
}
this._disposed = true;
}
}
private sealed class StoreState
{
public string ConversationIdentifier { get; set; } = string.Empty;
public string? TenantId { get; set; }
public string? UserId { get; set; }
public bool UseHierarchicalPartitioning { get; set; }
}
/// <summary>
/// Represents a document stored in Cosmos DB for chat messages.
/// </summary>
[SuppressMessage("Performance", "CA1812:Avoid uninstantiated internal classes", Justification = "Instantiated by Cosmos DB operations")]
private sealed class CosmosMessageDocument
{
[Newtonsoft.Json.JsonProperty("id")]
public string Id { get; set; } = string.Empty;
[Newtonsoft.Json.JsonProperty("conversationId")]
public string ConversationId { get; set; } = string.Empty;
[Newtonsoft.Json.JsonProperty("timestamp")]
public long Timestamp { get; set; }
[Newtonsoft.Json.JsonProperty("messageId")]
public string? MessageId { get; set; }
[Newtonsoft.Json.JsonProperty("role")]
public string? Role { get; set; }
[Newtonsoft.Json.JsonProperty("message")]
public string Message { get; set; } = string.Empty;
[Newtonsoft.Json.JsonProperty("type")]
public string Type { get; set; } = string.Empty;
[Newtonsoft.Json.JsonProperty("ttl")]
public int? Ttl { get; set; }
/// <summary>
/// Tenant ID for hierarchical partitioning scenarios (optional).
/// </summary>
[Newtonsoft.Json.JsonProperty("tenantId")]
public string? TenantId { get; set; }
/// <summary>
/// User ID for hierarchical partitioning scenarios (optional).
/// </summary>
[Newtonsoft.Json.JsonProperty("userId")]
public string? UserId { get; set; }
/// <summary>
/// Session ID for hierarchical partitioning scenarios (same as ConversationId for compatibility).
/// </summary>
[Newtonsoft.Json.JsonProperty("sessionId")]
public string? SessionId { get; set; }
}
}
@@ -0,0 +1,279 @@
// Copyright (c) Microsoft. All rights reserved.
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using Azure.Core;
using Microsoft.Azure.Cosmos;
using Microsoft.Shared.Diagnostics;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace Microsoft.Agents.AI.Workflows.Checkpointing;
/// <summary>
/// Provides a Cosmos DB implementation of the <see cref="JsonCheckpointStore"/> abstract class.
/// </summary>
/// <typeparam name="T">The type of objects to store as checkpoint values.</typeparam>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public class CosmosCheckpointStore<T> : JsonCheckpointStore, IDisposable
{
private readonly CosmosClient _cosmosClient;
private readonly Container _container;
private readonly bool _ownsClient;
private bool _disposed;
/// <summary>
/// Initializes a new instance of the <see cref="CosmosCheckpointStore{T}"/> class using a connection string.
/// </summary>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosCheckpointStore(string connectionString, string databaseId, string containerId)
{
var cosmosClientOptions = new CosmosClientOptions();
this._cosmosClient = new CosmosClient(Throw.IfNullOrWhitespace(connectionString), cosmosClientOptions);
this._container = this._cosmosClient.GetContainer(Throw.IfNullOrWhitespace(databaseId), Throw.IfNullOrWhitespace(containerId));
this._ownsClient = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosCheckpointStore{T}"/> class using a TokenCredential for authentication.
/// </summary>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="tokenCredential">The TokenCredential to use for authentication (e.g., DefaultAzureCredential, ManagedIdentityCredential).</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosCheckpointStore(string accountEndpoint, TokenCredential tokenCredential, string databaseId, string containerId)
{
var cosmosClientOptions = new CosmosClientOptions
{
SerializerOptions = new CosmosSerializationOptions
{
PropertyNamingPolicy = CosmosPropertyNamingPolicy.CamelCase
}
};
this._cosmosClient = new CosmosClient(Throw.IfNullOrWhitespace(accountEndpoint), Throw.IfNull(tokenCredential), cosmosClientOptions);
this._container = this._cosmosClient.GetContainer(Throw.IfNullOrWhitespace(databaseId), Throw.IfNullOrWhitespace(containerId));
this._ownsClient = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="CosmosCheckpointStore{T}"/> class using an existing <see cref="CosmosClient"/>.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="cosmosClient"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
public CosmosCheckpointStore(CosmosClient cosmosClient, string databaseId, string containerId)
{
this._cosmosClient = Throw.IfNull(cosmosClient);
this._container = this._cosmosClient.GetContainer(Throw.IfNullOrWhitespace(databaseId), Throw.IfNullOrWhitespace(containerId));
this._ownsClient = false;
}
/// <summary>
/// Gets the identifier of the Cosmos DB database.
/// </summary>
public string DatabaseId => this._container.Database.Id;
/// <summary>
/// Gets the identifier of the Cosmos DB container.
/// </summary>
public string ContainerId => this._container.Id;
/// <inheritdoc />
public override async ValueTask<CheckpointInfo> CreateCheckpointAsync(string runId, JsonElement value, CheckpointInfo? parent = null)
{
if (string.IsNullOrWhiteSpace(runId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(runId));
}
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
var checkpointId = Guid.NewGuid().ToString("N");
var checkpointInfo = new CheckpointInfo(runId, checkpointId);
var document = new CosmosCheckpointDocument
{
Id = $"{runId}_{checkpointId}",
RunId = runId,
CheckpointId = checkpointId,
Value = JToken.Parse(value.GetRawText()),
ParentCheckpointId = parent?.CheckpointId,
Timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds()
};
await this._container.CreateItemAsync(document, new PartitionKey(runId)).ConfigureAwait(false);
return checkpointInfo;
}
/// <inheritdoc />
public override async ValueTask<JsonElement> RetrieveCheckpointAsync(string runId, CheckpointInfo key)
{
if (string.IsNullOrWhiteSpace(runId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(runId));
}
if (key is null)
{
throw new ArgumentNullException(nameof(key));
}
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
var id = $"{runId}_{key.CheckpointId}";
try
{
var response = await this._container.ReadItemAsync<CosmosCheckpointDocument>(id, new PartitionKey(runId)).ConfigureAwait(false);
using var document = JsonDocument.Parse(response.Resource.Value.ToString());
return document.RootElement.Clone();
}
catch (CosmosException ex) when (ex.StatusCode == System.Net.HttpStatusCode.NotFound)
{
throw new InvalidOperationException($"Checkpoint with ID '{key.CheckpointId}' for run '{runId}' not found.");
}
}
/// <inheritdoc />
public override async ValueTask<IEnumerable<CheckpointInfo>> RetrieveIndexAsync(string runId, CheckpointInfo? withParent = null)
{
if (string.IsNullOrWhiteSpace(runId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(runId));
}
#pragma warning disable CA1513 // Use ObjectDisposedException.ThrowIf - not available on all target frameworks
if (this._disposed)
{
throw new ObjectDisposedException(this.GetType().FullName);
}
#pragma warning restore CA1513
QueryDefinition query = withParent == null
? new QueryDefinition("SELECT c.runId, c.checkpointId FROM c WHERE c.runId = @runId ORDER BY c.timestamp ASC")
.WithParameter("@runId", runId)
: new QueryDefinition("SELECT c.runId, c.checkpointId FROM c WHERE c.runId = @runId AND c.parentCheckpointId = @parentCheckpointId ORDER BY c.timestamp ASC")
.WithParameter("@runId", runId)
.WithParameter("@parentCheckpointId", withParent.CheckpointId);
var iterator = this._container.GetItemQueryIterator<CheckpointQueryResult>(query);
var checkpoints = new List<CheckpointInfo>();
while (iterator.HasMoreResults)
{
var response = await iterator.ReadNextAsync().ConfigureAwait(false);
checkpoints.AddRange(response.Select(r => new CheckpointInfo(r.RunId, r.CheckpointId)));
}
return checkpoints;
}
/// <inheritdoc />
public void Dispose()
{
this.Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="CosmosCheckpointStore{T}"/> and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
protected virtual void Dispose(bool disposing)
{
if (!this._disposed)
{
if (disposing && this._ownsClient)
{
this._cosmosClient?.Dispose();
}
this._disposed = true;
}
}
/// <summary>
/// Represents a checkpoint document stored in Cosmos DB.
/// </summary>
internal sealed class CosmosCheckpointDocument
{
[JsonProperty("id")]
public string Id { get; set; } = string.Empty;
[JsonProperty("runId")]
public string RunId { get; set; } = string.Empty;
[JsonProperty("checkpointId")]
public string CheckpointId { get; set; } = string.Empty;
[JsonProperty("value")]
public JToken Value { get; set; } = JValue.CreateNull();
[JsonProperty("parentCheckpointId")]
public string? ParentCheckpointId { get; set; }
[JsonProperty("timestamp")]
public long Timestamp { get; set; }
}
/// <summary>
/// Represents the result of a checkpoint query.
/// </summary>
[SuppressMessage("Performance", "CA1812:Avoid uninstantiated internal classes", Justification = "Instantiated by Cosmos DB query deserialization")]
private sealed class CheckpointQueryResult
{
public string RunId { get; set; } = string.Empty;
public string CheckpointId { get; set; } = string.Empty;
}
}
/// <summary>
/// Provides a non-generic Cosmos DB implementation of the <see cref="JsonCheckpointStore"/> abstract class.
/// </summary>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public sealed class CosmosCheckpointStore : CosmosCheckpointStore<JsonElement>
{
/// <inheritdoc />
public CosmosCheckpointStore(string connectionString, string databaseId, string containerId)
: base(connectionString, databaseId, containerId)
{
}
/// <inheritdoc />
public CosmosCheckpointStore(string accountEndpoint, TokenCredential tokenCredential, string databaseId, string containerId)
: base(accountEndpoint, tokenCredential, databaseId, containerId)
{
}
/// <inheritdoc />
public CosmosCheckpointStore(CosmosClient cosmosClient, string databaseId, string containerId)
: base(cosmosClient, databaseId, containerId)
{
}
}
@@ -0,0 +1,95 @@
// Copyright (c) Microsoft. All rights reserved.
using System;
using System.Diagnostics.CodeAnalysis;
using Azure.Identity;
using Microsoft.Azure.Cosmos;
namespace Microsoft.Agents.AI;
/// <summary>
/// Provides extension methods for integrating Cosmos DB chat message storage with the Agent Framework.
/// </summary>
public static class CosmosDBChatExtensions
{
/// <summary>
/// Configures the agent to use Cosmos DB for message storage with connection string authentication.
/// </summary>
/// <param name="options">The chat client agent options to configure.</param>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>The configured <see cref="ChatClientAgentOptions"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="options"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with NativeAOT.")]
public static ChatClientAgentOptions WithCosmosDBMessageStore(
this ChatClientAgentOptions options,
string connectionString,
string databaseId,
string containerId)
{
if (options is null)
{
throw new ArgumentNullException(nameof(options));
}
options.ChatMessageStoreFactory = context => new CosmosChatMessageStore(connectionString, databaseId, containerId);
return options;
}
/// <summary>
/// Configures the agent to use Cosmos DB for message storage with managed identity authentication.
/// </summary>
/// <param name="options">The chat client agent options to configure.</param>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>The configured <see cref="ChatClientAgentOptions"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="options"/> is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with NativeAOT.")]
public static ChatClientAgentOptions WithCosmosDBMessageStoreUsingManagedIdentity(
this ChatClientAgentOptions options,
string accountEndpoint,
string databaseId,
string containerId)
{
if (options is null)
{
throw new ArgumentNullException(nameof(options));
}
options.ChatMessageStoreFactory = context => new CosmosChatMessageStore(accountEndpoint, new DefaultAzureCredential(), databaseId, containerId);
return options;
}
/// <summary>
/// Configures the agent to use Cosmos DB for message storage with an existing <see cref="CosmosClient"/>.
/// </summary>
/// <param name="options">The chat client agent options to configure.</param>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>The configured <see cref="ChatClientAgentOptions"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosChatMessageStore uses JSON serialization which is incompatible with NativeAOT.")]
public static ChatClientAgentOptions WithCosmosDBMessageStore(
this ChatClientAgentOptions options,
CosmosClient cosmosClient,
string databaseId,
string containerId)
{
if (options is null)
{
throw new ArgumentNullException(nameof(options));
}
options.ChatMessageStoreFactory = context => new CosmosChatMessageStore(cosmosClient, databaseId, containerId);
return options;
}
}
@@ -0,0 +1,218 @@
// Copyright (c) Microsoft. All rights reserved.
using System;
using System.Diagnostics.CodeAnalysis;
using Azure.Identity;
using Microsoft.Agents.AI.Workflows.Checkpointing;
using Microsoft.Azure.Cosmos;
namespace Microsoft.Agents.AI.Workflows;
/// <summary>
/// Provides extension methods for integrating Cosmos DB checkpoint storage with the Agent Framework.
/// </summary>
public static class CosmosDBWorkflowExtensions
{
/// <summary>
/// Creates a Cosmos DB checkpoint store using connection string authentication.
/// </summary>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>A new instance of <see cref="CosmosCheckpointStore"/>.</returns>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public static CosmosCheckpointStore CreateCheckpointStore(
string connectionString,
string databaseId,
string containerId)
{
if (string.IsNullOrWhiteSpace(connectionString))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(connectionString));
}
if (string.IsNullOrWhiteSpace(databaseId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(databaseId));
}
if (string.IsNullOrWhiteSpace(containerId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(containerId));
}
return new CosmosCheckpointStore(connectionString, databaseId, containerId);
}
/// <summary>
/// Creates a Cosmos DB checkpoint store using managed identity authentication.
/// </summary>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>A new instance of <see cref="CosmosCheckpointStore"/>.</returns>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public static CosmosCheckpointStore CreateCheckpointStoreUsingManagedIdentity(
string accountEndpoint,
string databaseId,
string containerId)
{
if (string.IsNullOrWhiteSpace(accountEndpoint))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(accountEndpoint));
}
if (string.IsNullOrWhiteSpace(databaseId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(databaseId));
}
if (string.IsNullOrWhiteSpace(containerId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(containerId));
}
return new CosmosCheckpointStore(accountEndpoint, new DefaultAzureCredential(), databaseId, containerId);
}
/// <summary>
/// Creates a Cosmos DB checkpoint store using an existing <see cref="CosmosClient"/>.
/// </summary>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>A new instance of <see cref="CosmosCheckpointStore"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public static CosmosCheckpointStore CreateCheckpointStore(
CosmosClient cosmosClient,
string databaseId,
string containerId)
{
if (cosmosClient is null)
{
throw new ArgumentNullException(nameof(cosmosClient));
}
if (string.IsNullOrWhiteSpace(databaseId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(databaseId));
}
if (string.IsNullOrWhiteSpace(containerId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(containerId));
}
return new CosmosCheckpointStore(cosmosClient, databaseId, containerId);
}
/// <summary>
/// Creates a generic Cosmos DB checkpoint store using connection string authentication.
/// </summary>
/// <typeparam name="T">The type of objects to store as checkpoint values.</typeparam>
/// <param name="connectionString">The Cosmos DB connection string.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>A new instance of <see cref="CosmosCheckpointStore{T}"/>.</returns>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public static CosmosCheckpointStore<T> CreateCheckpointStore<T>(
string connectionString,
string databaseId,
string containerId)
{
if (string.IsNullOrWhiteSpace(connectionString))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(connectionString));
}
if (string.IsNullOrWhiteSpace(databaseId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(databaseId));
}
if (string.IsNullOrWhiteSpace(containerId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(containerId));
}
return new CosmosCheckpointStore<T>(connectionString, databaseId, containerId);
}
/// <summary>
/// Creates a generic Cosmos DB checkpoint store using managed identity authentication.
/// </summary>
/// <typeparam name="T">The type of objects to store as checkpoint values.</typeparam>
/// <param name="accountEndpoint">The Cosmos DB account endpoint URI.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>A new instance of <see cref="CosmosCheckpointStore{T}"/>.</returns>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public static CosmosCheckpointStore<T> CreateCheckpointStoreUsingManagedIdentity<T>(
string accountEndpoint,
string databaseId,
string containerId)
{
if (string.IsNullOrWhiteSpace(accountEndpoint))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(accountEndpoint));
}
if (string.IsNullOrWhiteSpace(databaseId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(databaseId));
}
if (string.IsNullOrWhiteSpace(containerId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(containerId));
}
return new CosmosCheckpointStore<T>(accountEndpoint, new DefaultAzureCredential(), databaseId, containerId);
}
/// <summary>
/// Creates a generic Cosmos DB checkpoint store using an existing <see cref="CosmosClient"/>.
/// </summary>
/// <typeparam name="T">The type of objects to store as checkpoint values.</typeparam>
/// <param name="cosmosClient">The <see cref="CosmosClient"/> instance to use for Cosmos DB operations.</param>
/// <param name="databaseId">The identifier of the Cosmos DB database.</param>
/// <param name="containerId">The identifier of the Cosmos DB container.</param>
/// <returns>A new instance of <see cref="CosmosCheckpointStore{T}"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when any required parameter is null.</exception>
/// <exception cref="ArgumentException">Thrown when any string parameter is null or whitespace.</exception>
[RequiresUnreferencedCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with trimming.")]
[RequiresDynamicCode("The CosmosCheckpointStore uses JSON serialization which is incompatible with NativeAOT.")]
public static CosmosCheckpointStore<T> CreateCheckpointStore<T>(
CosmosClient cosmosClient,
string databaseId,
string containerId)
{
if (cosmosClient is null)
{
throw new ArgumentNullException(nameof(cosmosClient));
}
if (string.IsNullOrWhiteSpace(databaseId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(databaseId));
}
if (string.IsNullOrWhiteSpace(containerId))
{
throw new ArgumentException("Cannot be null or whitespace", nameof(containerId));
}
return new CosmosCheckpointStore<T>(cosmosClient, databaseId, containerId);
}
}
@@ -0,0 +1,41 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFrameworks>$(TargetFrameworksCore)</TargetFrameworks>
<RootNamespace>Microsoft.Agents.AI</RootNamespace>
<NoWarn>$(NoWarn);MEAI001</NoWarn>
<VersionSuffix>preview</VersionSuffix>
</PropertyGroup>
<PropertyGroup>
<InjectSharedThrow>true</InjectSharedThrow>
<InjectDiagnosticClassesOnLegacy>true</InjectDiagnosticClassesOnLegacy>
<InjectTrimAttributesOnLegacy>true</InjectTrimAttributesOnLegacy>
<InjectIsExternalInitOnLegacy>true</InjectIsExternalInitOnLegacy>
<InjectRequiredMemberOnLegacy>true</InjectRequiredMemberOnLegacy>
<InjectCompilerFeatureRequiredOnLegacy>true</InjectCompilerFeatureRequiredOnLegacy>
</PropertyGroup>
<Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
<PropertyGroup>
<!-- NuGet Package Settings -->
<Title>Microsoft Agent Framework Cosmos DB NoSQL Integration</Title>
<Description>Provides Cosmos DB NoSQL implementations for Microsoft Agent Framework storage abstractions including ChatMessageStore and CheckpointStore.</Description>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
<ProjectReference Include="..\Microsoft.Agents.AI.Workflows\Microsoft.Agents.AI.Workflows.csproj" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Microsoft.Azure.Cosmos" />
<PackageReference Include="Azure.Identity" />
<PackageReference Include="Newtonsoft.Json" />
</ItemGroup>
<ItemGroup>
<InternalsVisibleTo Include="Microsoft.Agents.AI.CosmosNoSql.UnitTests" />
</ItemGroup>
</Project>
@@ -0,0 +1,9 @@
# EditorConfig overrides for Cosmos DB Unit Tests
# Multi-targeting (net472 + net9.0) causes false positives for IDE0005 (unnecessary using directives)
root = false
[*.cs]
# Suppress IDE0005 for this project - multi-targeting causes false positives
# These using directives ARE necessary but appear unnecessary in one target framework
dotnet_diagnostic.IDE0005.severity = none
@@ -0,0 +1,760 @@
// Copyright (c) Microsoft. All rights reserved.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Text.Json.Serialization.Metadata;
using System.Threading.Tasks;
using Azure.Core;
using Azure.Identity;
using Microsoft.Agents.AI;
using Microsoft.Azure.Cosmos;
using Microsoft.Extensions.AI;
using Xunit;
namespace Microsoft.Agents.AI.CosmosNoSql.UnitTests;
/// <summary>
/// Contains tests for <see cref="CosmosChatMessageStore"/>.
///
/// Test Modes:
/// - Default Mode: Cleans up all test data after each test run (deletes database)
/// - Preserve Mode: Keeps containers and data for inspection in Cosmos DB Emulator Data Explorer
///
/// To enable Preserve Mode, set environment variable: COSMOS_PRESERVE_CONTAINERS=true
/// Example: $env:COSMOS_PRESERVE_CONTAINERS="true"; dotnet test
///
/// In Preserve Mode, you can view the data in Cosmos DB Emulator Data Explorer at:
/// https://localhost:8081/_explorer/index.html
/// Database: AgentFrameworkTests
/// Container: ChatMessages
///
/// Environment Variable Reference:
/// | Variable | Values | Description |
/// |----------|--------|-------------|
/// | COSMOS_PRESERVE_CONTAINERS | true / false | Controls whether to preserve test data after completion |
///
/// Usage Examples:
/// - Run all tests in preserve mode: $env:COSMOS_PRESERVE_CONTAINERS="true"; dotnet test tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/
/// - Run specific test category in preserve mode: $env:COSMOS_PRESERVE_CONTAINERS="true"; dotnet test tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/ --filter "Category=CosmosDB"
/// - Reset to cleanup mode: $env:COSMOS_PRESERVE_CONTAINERS=""; dotnet test tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/
/// </summary>
[Collection("CosmosDB")]
public sealed class CosmosChatMessageStoreTests : IAsyncLifetime, IDisposable
{
// Cosmos DB Emulator connection settings
private const string EmulatorEndpoint = "https://localhost:8081";
private const string EmulatorKey = "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==";
private const string TestContainerId = "ChatMessages";
private const string HierarchicalTestContainerId = "HierarchicalChatMessages";
// Use unique database ID per test class instance to avoid conflicts
#pragma warning disable CA1802 // Use literals where appropriate
private static readonly string s_testDatabaseId = $"AgentFrameworkTests-ChatStore-{Guid.NewGuid():N}";
#pragma warning restore CA1802
private string _connectionString = string.Empty;
private bool _emulatorAvailable;
private bool _preserveContainer;
private CosmosClient? _setupClient; // Only used for test setup/cleanup
public async Task InitializeAsync()
{
// Check environment variable to determine if we should preserve containers
// Set COSMOS_PRESERVE_CONTAINERS=true to keep containers and data for inspection
this._preserveContainer = string.Equals(Environment.GetEnvironmentVariable("COSMOS_PRESERVE_CONTAINERS"), "true", StringComparison.OrdinalIgnoreCase);
this._connectionString = $"AccountEndpoint={EmulatorEndpoint};AccountKey={EmulatorKey}";
try
{
// Only create CosmosClient for test setup - the actual tests will use connection string constructors
this._setupClient = new CosmosClient(EmulatorEndpoint, EmulatorKey);
// Test connection by attempting to create database
var databaseResponse = await this._setupClient.CreateDatabaseIfNotExistsAsync(s_testDatabaseId);
// Create container for simple partitioning tests
await databaseResponse.Database.CreateContainerIfNotExistsAsync(
TestContainerId,
"/conversationId",
throughput: 400);
// Create container for hierarchical partitioning tests with hierarchical partition key
var hierarchicalContainerProperties = new ContainerProperties(HierarchicalTestContainerId, new List<string> { "/tenantId", "/userId", "/sessionId" });
await databaseResponse.Database.CreateContainerIfNotExistsAsync(
hierarchicalContainerProperties,
throughput: 400);
this._emulatorAvailable = true;
}
catch (Exception)
{
// Emulator not available, tests will be skipped
this._emulatorAvailable = false;
this._setupClient?.Dispose();
this._setupClient = null;
}
}
public async Task DisposeAsync()
{
if (this._setupClient != null && this._emulatorAvailable)
{
try
{
if (this._preserveContainer)
{
// Preserve mode: Don't delete the database/container, keep data for inspection
// This allows viewing data in the Cosmos DB Emulator Data Explorer
// No cleanup needed - data persists for debugging
}
else
{
// Clean mode: Delete the test database and all data
var database = this._setupClient.GetDatabase(s_testDatabaseId);
await database.DeleteAsync();
}
}
catch (Exception ex)
{
// Ignore cleanup errors during test teardown
Console.WriteLine($"Warning: Cleanup failed: {ex.Message}");
}
finally
{
this._setupClient.Dispose();
}
}
}
public void Dispose()
{
this._setupClient?.Dispose();
GC.SuppressFinalize(this);
}
private void SkipIfEmulatorNotAvailable()
{
// In CI: Skip if COSMOS_EMULATOR_AVAILABLE is not set to "true"
// Locally: Skip if emulator connection check failed
var ciEmulatorAvailable = string.Equals(Environment.GetEnvironmentVariable("COSMOS_EMULATOR_AVAILABLE"), "true", StringComparison.OrdinalIgnoreCase);
Xunit.Skip.If(!ciEmulatorAvailable && !this._emulatorAvailable, "Cosmos DB Emulator is not available");
}
#region Constructor Tests
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithConnectionString_ShouldCreateInstance()
{
// Arrange & Act
this.SkipIfEmulatorNotAvailable();
// Act
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, "test-conversation");
// Assert
Assert.NotNull(store);
Assert.Equal("test-conversation", store.ConversationId);
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(TestContainerId, store.ContainerId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithConnectionStringNoConversationId_ShouldCreateInstance()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
// Act
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId);
// Assert
Assert.NotNull(store);
Assert.NotNull(store.ConversationId);
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(TestContainerId, store.ContainerId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithNullConnectionString_ShouldThrowArgumentException()
{
// Arrange & Act & Assert
Assert.Throws<ArgumentNullException>(() =>
new CosmosChatMessageStore((string)null!, s_testDatabaseId, TestContainerId, "test-conversation"));
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithEmptyConversationId_ShouldThrowArgumentException()
{
// Arrange & Act & Assert
this.SkipIfEmulatorNotAvailable();
Assert.Throws<ArgumentException>(() =>
new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, ""));
}
#endregion
#region AddMessagesAsync Tests
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task AddMessagesAsync_WithSingleMessage_ShouldAddMessageAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
var conversationId = Guid.NewGuid().ToString();
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, conversationId);
var message = new ChatMessage(ChatRole.User, "Hello, world!");
// Act
await store.AddMessagesAsync([message]);
// Wait a moment for eventual consistency
await Task.Delay(100);
// Assert
var messages = await store.GetMessagesAsync();
var messageList = messages.ToList();
// Simple assertion - if this fails, we know the deserialization is the issue
if (messageList.Count == 0)
{
// Let's check if we can find ANY items in the container for this conversation
var directQuery = new QueryDefinition("SELECT VALUE COUNT(1) FROM c WHERE c.conversationId = @conversationId")
.WithParameter("@conversationId", conversationId);
var countIterator = this._setupClient!.GetDatabase(s_testDatabaseId).GetContainer(TestContainerId)
.GetItemQueryIterator<int>(directQuery, requestOptions: new QueryRequestOptions
{
PartitionKey = new PartitionKey(conversationId)
});
var countResponse = await countIterator.ReadNextAsync();
var count = countResponse.FirstOrDefault();
// Debug: Let's see what the raw query returns
var rawQuery = new QueryDefinition("SELECT * FROM c WHERE c.conversationId = @conversationId")
.WithParameter("@conversationId", conversationId);
var rawIterator = this._setupClient!.GetDatabase(s_testDatabaseId).GetContainer(TestContainerId)
.GetItemQueryIterator<dynamic>(rawQuery, requestOptions: new QueryRequestOptions
{
PartitionKey = new PartitionKey(conversationId)
});
List<dynamic> rawResults = new();
while (rawIterator.HasMoreResults)
{
var rawResponse = await rawIterator.ReadNextAsync();
rawResults.AddRange(rawResponse);
}
string rawJson = rawResults.Count > 0 ? Newtonsoft.Json.JsonConvert.SerializeObject(rawResults[0], Newtonsoft.Json.Formatting.Indented) : "null";
Assert.Fail($"GetMessagesAsync returned 0 messages, but direct count query found {count} items for conversation {conversationId}. Raw document: {rawJson}");
}
Assert.Single(messageList);
Assert.Equal("Hello, world!", messageList[0].Text);
Assert.Equal(ChatRole.User, messageList[0].Role);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task AddMessagesAsync_WithMultipleMessages_ShouldAddAllMessagesAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
var conversationId = Guid.NewGuid().ToString();
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, conversationId);
var messages = new[]
{
new ChatMessage(ChatRole.User, "First message"),
new ChatMessage(ChatRole.Assistant, "Second message"),
new ChatMessage(ChatRole.User, "Third message")
};
// Act
await store.AddMessagesAsync(messages);
// Assert
var retrievedMessages = await store.GetMessagesAsync();
var messageList = retrievedMessages.ToList();
Assert.Equal(3, messageList.Count);
Assert.Equal("First message", messageList[0].Text);
Assert.Equal("Second message", messageList[1].Text);
Assert.Equal("Third message", messageList[2].Text);
}
#endregion
#region GetMessagesAsync Tests
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task GetMessagesAsync_WithNoMessages_ShouldReturnEmptyAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, Guid.NewGuid().ToString());
// Act
var messages = await store.GetMessagesAsync();
// Assert
Assert.Empty(messages);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task GetMessagesAsync_WithConversationIsolation_ShouldOnlyReturnMessagesForConversationAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
var conversation1 = Guid.NewGuid().ToString();
var conversation2 = Guid.NewGuid().ToString();
using var store1 = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, conversation1);
using var store2 = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, conversation2);
await store1.AddMessagesAsync([new ChatMessage(ChatRole.User, "Message for conversation 1")]);
await store2.AddMessagesAsync([new ChatMessage(ChatRole.User, "Message for conversation 2")]);
// Act
var messages1 = await store1.GetMessagesAsync();
var messages2 = await store2.GetMessagesAsync();
// Assert
var messageList1 = messages1.ToList();
var messageList2 = messages2.ToList();
Assert.Single(messageList1);
Assert.Single(messageList2);
Assert.Equal("Message for conversation 1", messageList1[0].Text);
Assert.Equal("Message for conversation 2", messageList2[0].Text);
}
#endregion
#region Integration Tests
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task FullWorkflow_AddAndGet_ShouldWorkCorrectlyAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
var conversationId = $"test-conversation-{Guid.NewGuid():N}"; // Use unique conversation ID
using var originalStore = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, conversationId);
var messages = new[]
{
new ChatMessage(ChatRole.System, "You are a helpful assistant."),
new ChatMessage(ChatRole.User, "Hello!"),
new ChatMessage(ChatRole.Assistant, "Hi there! How can I help you today?"),
new ChatMessage(ChatRole.User, "What's the weather like?"),
new ChatMessage(ChatRole.Assistant, "I'm sorry, I don't have access to current weather data.")
};
// Act 1: Add messages
await originalStore.AddMessagesAsync(messages);
// Act 2: Verify messages were added
var retrievedMessages = await originalStore.GetMessagesAsync();
var retrievedList = retrievedMessages.ToList();
Assert.Equal(5, retrievedList.Count);
// Act 3: Create new store instance for same conversation (test persistence)
using var newStore = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, conversationId);
var persistedMessages = await newStore.GetMessagesAsync();
var persistedList = persistedMessages.ToList();
// Assert final state
Assert.Equal(5, persistedList.Count);
Assert.Equal("You are a helpful assistant.", persistedList[0].Text);
Assert.Equal("Hello!", persistedList[1].Text);
Assert.Equal("Hi there! How can I help you today?", persistedList[2].Text);
Assert.Equal("What's the weather like?", persistedList[3].Text);
Assert.Equal("I'm sorry, I don't have access to current weather data.", persistedList[4].Text);
}
#endregion
#region Disposal Tests
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Dispose_AfterUse_ShouldNotThrow()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, Guid.NewGuid().ToString());
// Act & Assert
store.Dispose(); // Should not throw
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Dispose_MultipleCalls_ShouldNotThrow()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, Guid.NewGuid().ToString());
// Act & Assert
store.Dispose(); // First call
store.Dispose(); // Second call - should not throw
}
#endregion
#region Hierarchical Partitioning Tests
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithHierarchicalConnectionString_ShouldCreateInstance()
{
// Arrange & Act
this.SkipIfEmulatorNotAvailable();
// Act
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, "tenant-123", "user-456", "session-789");
// Assert
Assert.NotNull(store);
Assert.Equal("session-789", store.ConversationId);
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(HierarchicalTestContainerId, store.ContainerId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithHierarchicalEndpoint_ShouldCreateInstance()
{
// Arrange & Act
this.SkipIfEmulatorNotAvailable();
// Act
TokenCredential credential = new DefaultAzureCredential();
using var store = new CosmosChatMessageStore(EmulatorEndpoint, credential, s_testDatabaseId, HierarchicalTestContainerId, "tenant-123", "user-456", "session-789");
// Assert
Assert.NotNull(store);
Assert.Equal("session-789", store.ConversationId);
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(HierarchicalTestContainerId, store.ContainerId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithHierarchicalCosmosClient_ShouldCreateInstance()
{
// Arrange & Act
this.SkipIfEmulatorNotAvailable();
using var cosmosClient = new CosmosClient(EmulatorEndpoint, EmulatorKey);
using var store = new CosmosChatMessageStore(cosmosClient, s_testDatabaseId, HierarchicalTestContainerId, "tenant-123", "user-456", "session-789");
// Assert
Assert.NotNull(store);
Assert.Equal("session-789", store.ConversationId);
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(HierarchicalTestContainerId, store.ContainerId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithHierarchicalNullTenantId_ShouldThrowArgumentException()
{
// Arrange & Act & Assert
this.SkipIfEmulatorNotAvailable();
Assert.Throws<ArgumentNullException>(() =>
new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, null!, "user-456", "session-789"));
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithHierarchicalEmptyUserId_ShouldThrowArgumentException()
{
// Arrange & Act & Assert
this.SkipIfEmulatorNotAvailable();
Assert.Throws<ArgumentException>(() =>
new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, "tenant-123", "", "session-789"));
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public void Constructor_WithHierarchicalWhitespaceSessionId_ShouldThrowArgumentException()
{
// Arrange & Act & Assert
this.SkipIfEmulatorNotAvailable();
Assert.Throws<ArgumentException>(() =>
new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, "tenant-123", "user-456", " "));
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task AddMessagesAsync_WithHierarchicalPartitioning_ShouldAddMessageWithMetadataAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string TenantId = "tenant-123";
const string UserId = "user-456";
const string SessionId = "session-789";
// Test hierarchical partitioning constructor with connection string
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, TenantId, UserId, SessionId);
var message = new ChatMessage(ChatRole.User, "Hello from hierarchical partitioning!");
// Act
await store.AddMessagesAsync([message]);
// Wait a moment for eventual consistency
await Task.Delay(100);
// Assert
var messages = await store.GetMessagesAsync();
var messageList = messages.ToList();
Assert.Single(messageList);
Assert.Equal("Hello from hierarchical partitioning!", messageList[0].Text);
Assert.Equal(ChatRole.User, messageList[0].Role);
// Verify that the document is stored with hierarchical partitioning metadata
var directQuery = new QueryDefinition("SELECT * FROM c WHERE c.conversationId = @conversationId AND c.type = @type")
.WithParameter("@conversationId", SessionId)
.WithParameter("@type", "ChatMessage");
var iterator = this._setupClient!.GetDatabase(s_testDatabaseId).GetContainer(HierarchicalTestContainerId)
.GetItemQueryIterator<dynamic>(directQuery, requestOptions: new QueryRequestOptions
{
PartitionKey = new PartitionKeyBuilder().Add(TenantId).Add(UserId).Add(SessionId).Build()
});
var response = await iterator.ReadNextAsync();
var document = response.FirstOrDefault();
Assert.NotNull(document);
// The document should have hierarchical metadata
Assert.Equal(SessionId, (string)document!.conversationId);
Assert.Equal(TenantId, (string)document!.tenantId);
Assert.Equal(UserId, (string)document!.userId);
Assert.Equal(SessionId, (string)document!.sessionId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task AddMessagesAsync_WithHierarchicalMultipleMessages_ShouldAddAllMessagesAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string TenantId = "tenant-batch";
const string UserId = "user-batch";
const string SessionId = "session-batch";
// Test hierarchical partitioning constructor with connection string
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, TenantId, UserId, SessionId);
var messages = new[]
{
new ChatMessage(ChatRole.User, "First hierarchical message"),
new ChatMessage(ChatRole.Assistant, "Second hierarchical message"),
new ChatMessage(ChatRole.User, "Third hierarchical message")
};
// Act
await store.AddMessagesAsync(messages);
// Wait a moment for eventual consistency
await Task.Delay(100);
// Assert
var retrievedMessages = await store.GetMessagesAsync();
var messageList = retrievedMessages.ToList();
Assert.Equal(3, messageList.Count);
Assert.Equal("First hierarchical message", messageList[0].Text);
Assert.Equal("Second hierarchical message", messageList[1].Text);
Assert.Equal("Third hierarchical message", messageList[2].Text);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task GetMessagesAsync_WithHierarchicalPartitionIsolation_ShouldIsolateMessagesByUserIdAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string TenantId = "tenant-isolation";
const string UserId1 = "user-1";
const string UserId2 = "user-2";
const string SessionId = "session-isolation";
// Different userIds create different hierarchical partitions, providing proper isolation
using var store1 = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, TenantId, UserId1, SessionId);
using var store2 = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, TenantId, UserId2, SessionId);
// Add messages to both stores
await store1.AddMessagesAsync([new ChatMessage(ChatRole.User, "Message from user 1")]);
await store2.AddMessagesAsync([new ChatMessage(ChatRole.User, "Message from user 2")]);
// Wait a moment for eventual consistency
await Task.Delay(100);
// Act & Assert
var messages1 = await store1.GetMessagesAsync();
var messageList1 = messages1.ToList();
var messages2 = await store2.GetMessagesAsync();
var messageList2 = messages2.ToList();
// With true hierarchical partitioning, each user sees only their own messages
Assert.Single(messageList1);
Assert.Single(messageList2);
Assert.Equal("Message from user 1", messageList1[0].Text);
Assert.Equal("Message from user 2", messageList2[0].Text);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task SerializeDeserialize_WithHierarchicalPartitioning_ShouldPreserveStateAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string TenantId = "tenant-serialize";
const string UserId = "user-serialize";
const string SessionId = "session-serialize";
using var originalStore = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, TenantId, UserId, SessionId);
await originalStore.AddMessagesAsync([new ChatMessage(ChatRole.User, "Test serialization message")]);
// Act - Serialize the store state
var serializedState = originalStore.Serialize();
// Create a new store from the serialized state
using var cosmosClient = new CosmosClient(EmulatorEndpoint, EmulatorKey);
var serializerOptions = new JsonSerializerOptions
{
TypeInfoResolver = new DefaultJsonTypeInfoResolver()
};
using var deserializedStore = CosmosChatMessageStore.CreateFromSerializedState(cosmosClient, serializedState, s_testDatabaseId, HierarchicalTestContainerId, serializerOptions);
// Wait a moment for eventual consistency
await Task.Delay(100);
// Assert - The deserialized store should have the same functionality
var messages = await deserializedStore.GetMessagesAsync();
var messageList = messages.ToList();
Assert.Single(messageList);
Assert.Equal("Test serialization message", messageList[0].Text);
Assert.Equal(SessionId, deserializedStore.ConversationId);
Assert.Equal(s_testDatabaseId, deserializedStore.DatabaseId);
Assert.Equal(HierarchicalTestContainerId, deserializedStore.ContainerId);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task HierarchicalAndSimplePartitioning_ShouldCoexistAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string SessionId = "coexist-session";
// Create simple store using simple partitioning container and hierarchical store using hierarchical container
using var simpleStore = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, SessionId);
using var hierarchicalStore = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, HierarchicalTestContainerId, "tenant-coexist", "user-coexist", SessionId);
// Add messages to both
await simpleStore.AddMessagesAsync([new ChatMessage(ChatRole.User, "Simple partitioning message")]);
await hierarchicalStore.AddMessagesAsync([new ChatMessage(ChatRole.User, "Hierarchical partitioning message")]);
// Wait a moment for eventual consistency
await Task.Delay(100);
// Act & Assert
var simpleMessages = await simpleStore.GetMessagesAsync();
var simpleMessageList = simpleMessages.ToList();
var hierarchicalMessages = await hierarchicalStore.GetMessagesAsync();
var hierarchicalMessageList = hierarchicalMessages.ToList();
// Each should only see its own messages since they use different containers
Assert.Single(simpleMessageList);
Assert.Single(hierarchicalMessageList);
Assert.Equal("Simple partitioning message", simpleMessageList[0].Text);
Assert.Equal("Hierarchical partitioning message", hierarchicalMessageList[0].Text);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task MaxMessagesToRetrieve_ShouldLimitAndReturnMostRecentAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string ConversationId = "max-messages-test";
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, ConversationId);
// Add 10 messages
var messages = new List<ChatMessage>();
for (int i = 1; i <= 10; i++)
{
messages.Add(new ChatMessage(ChatRole.User, $"Message {i}"));
await Task.Delay(10); // Small delay to ensure different timestamps
}
await store.AddMessagesAsync(messages);
// Wait for eventual consistency
await Task.Delay(100);
// Act - Set max to 5 and retrieve
store.MaxMessagesToRetrieve = 5;
var retrievedMessages = await store.GetMessagesAsync();
var messageList = retrievedMessages.ToList();
// Assert - Should get the 5 most recent messages (6-10) in ascending order
Assert.Equal(5, messageList.Count);
Assert.Equal("Message 6", messageList[0].Text);
Assert.Equal("Message 7", messageList[1].Text);
Assert.Equal("Message 8", messageList[2].Text);
Assert.Equal("Message 9", messageList[3].Text);
Assert.Equal("Message 10", messageList[4].Text);
}
[SkippableFact]
[Trait("Category", "CosmosDB")]
public async Task MaxMessagesToRetrieve_Null_ShouldReturnAllMessagesAsync()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
const string ConversationId = "max-messages-null-test";
using var store = new CosmosChatMessageStore(this._connectionString, s_testDatabaseId, TestContainerId, ConversationId);
// Add 10 messages
var messages = new List<ChatMessage>();
for (int i = 1; i <= 10; i++)
{
messages.Add(new ChatMessage(ChatRole.User, $"Message {i}"));
}
await store.AddMessagesAsync(messages);
// Wait for eventual consistency
await Task.Delay(100);
// Act - No limit set (default null)
var retrievedMessages = await store.GetMessagesAsync();
var messageList = retrievedMessages.ToList();
// Assert - Should get all 10 messages
Assert.Equal(10, messageList.Count);
Assert.Equal("Message 1", messageList[0].Text);
Assert.Equal("Message 10", messageList[9].Text);
}
#endregion
}
@@ -0,0 +1,454 @@
// Copyright (c) Microsoft. All rights reserved.
using System;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.Agents.AI.Workflows;
using Microsoft.Agents.AI.Workflows.Checkpointing;
using Microsoft.Azure.Cosmos;
using Xunit;
namespace Microsoft.Agents.AI.CosmosNoSql.UnitTests;
/// <summary>
/// Contains tests for <see cref="CosmosCheckpointStore"/>.
///
/// Test Modes:
/// - Default Mode: Cleans up all test data after each test run (deletes database)
/// - Preserve Mode: Keeps containers and data for inspection in Cosmos DB Emulator Data Explorer
///
/// To enable Preserve Mode, set environment variable: COSMOS_PRESERVE_CONTAINERS=true
/// Example: $env:COSMOS_PRESERVE_CONTAINERS="true"; dotnet test
///
/// In Preserve Mode, you can view the data in Cosmos DB Emulator Data Explorer at:
/// https://localhost:8081/_explorer/index.html
/// Database: AgentFrameworkTests
/// Container: Checkpoints
/// </summary>
[Collection("CosmosDB")]
public class CosmosCheckpointStoreTests : IAsyncLifetime, IDisposable
{
// Cosmos DB Emulator connection settings
private const string EmulatorEndpoint = "https://localhost:8081";
private const string EmulatorKey = "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==";
private const string TestContainerId = "Checkpoints";
// Use unique database ID per test class instance to avoid conflicts
#pragma warning disable CA1802 // Use literals where appropriate
private static readonly string s_testDatabaseId = $"AgentFrameworkTests-CheckpointStore-{Guid.NewGuid():N}";
#pragma warning restore CA1802
private string _connectionString = string.Empty;
private CosmosClient? _cosmosClient;
private Database? _database;
private bool _emulatorAvailable;
private bool _preserveContainer;
// JsonSerializerOptions configured for .NET 9+ compatibility
private static readonly JsonSerializerOptions s_jsonOptions = CreateJsonOptions();
private static JsonSerializerOptions CreateJsonOptions()
{
var options = new JsonSerializerOptions();
#if NET9_0_OR_GREATER
options.TypeInfoResolver = new System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver();
#endif
return options;
}
public async Task InitializeAsync()
{
// Check environment variable to determine if we should preserve containers
// Set COSMOS_PRESERVE_CONTAINERS=true to keep containers and data for inspection
this._preserveContainer = string.Equals(Environment.GetEnvironmentVariable("COSMOS_PRESERVE_CONTAINERS"), "true", StringComparison.OrdinalIgnoreCase);
this._connectionString = $"AccountEndpoint={EmulatorEndpoint};AccountKey={EmulatorKey}";
try
{
this._cosmosClient = new CosmosClient(EmulatorEndpoint, EmulatorKey);
// Test connection by attempting to create database
this._database = await this._cosmosClient.CreateDatabaseIfNotExistsAsync(s_testDatabaseId);
await this._database.CreateContainerIfNotExistsAsync(
TestContainerId,
"/runId",
throughput: 400);
this._emulatorAvailable = true;
}
catch (Exception ex) when (!(ex is OutOfMemoryException || ex is StackOverflowException || ex is AccessViolationException))
{
// Emulator not available, tests will be skipped
this._emulatorAvailable = false;
this._cosmosClient?.Dispose();
this._cosmosClient = null;
}
}
public async Task DisposeAsync()
{
if (this._cosmosClient != null && this._emulatorAvailable)
{
try
{
if (this._preserveContainer)
{
// Preserve mode: Don't delete the database/container, keep data for inspection
// This allows viewing data in the Cosmos DB Emulator Data Explorer
// No cleanup needed - data persists for debugging
}
else
{
// Clean mode: Delete the test database and all data
await this._database!.DeleteAsync();
}
}
catch (Exception ex)
{
// Ignore cleanup errors, but log for diagnostics
Console.WriteLine($"[DisposeAsync] Cleanup error: {ex.Message}\n{ex.StackTrace}");
}
finally
{
this._cosmosClient.Dispose();
}
}
}
private void SkipIfEmulatorNotAvailable()
{
// In CI: Skip if COSMOS_EMULATOR_AVAILABLE is not set to "true"
// Locally: Skip if emulator connection check failed
var ciEmulatorAvailable = string.Equals(Environment.GetEnvironmentVariable("COSMOS_EMULATOR_AVAILABLE"), "true", StringComparison.OrdinalIgnoreCase);
Xunit.Skip.If(!ciEmulatorAvailable && !this._emulatorAvailable, "Cosmos DB Emulator is not available");
}
#region Constructor Tests
[SkippableFact]
public void Constructor_WithCosmosClient_SetsProperties()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
// Act
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
// Assert
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(TestContainerId, store.ContainerId);
}
[SkippableFact]
public void Constructor_WithConnectionString_SetsProperties()
{
// Arrange
this.SkipIfEmulatorNotAvailable();
// Act
using var store = new CosmosCheckpointStore(this._connectionString, s_testDatabaseId, TestContainerId);
// Assert
Assert.Equal(s_testDatabaseId, store.DatabaseId);
Assert.Equal(TestContainerId, store.ContainerId);
}
[SkippableFact]
public void Constructor_WithNullCosmosClient_ThrowsArgumentNullException()
{
// Act & Assert
Assert.Throws<ArgumentNullException>(() =>
new CosmosCheckpointStore((CosmosClient)null!, s_testDatabaseId, TestContainerId));
}
[SkippableFact]
public void Constructor_WithNullConnectionString_ThrowsArgumentException()
{
// Act & Assert
Assert.Throws<ArgumentNullException>(() =>
new CosmosCheckpointStore((string)null!, s_testDatabaseId, TestContainerId));
}
#endregion
#region Checkpoint Operations Tests
[SkippableFact]
public async Task CreateCheckpointAsync_NewCheckpoint_CreatesSuccessfullyAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test checkpoint" }, s_jsonOptions);
// Act
var checkpointInfo = await store.CreateCheckpointAsync(runId, checkpointValue);
// Assert
Assert.NotNull(checkpointInfo);
Assert.Equal(runId, checkpointInfo.RunId);
Assert.NotNull(checkpointInfo.CheckpointId);
Assert.NotEmpty(checkpointInfo.CheckpointId);
}
[SkippableFact]
public async Task RetrieveCheckpointAsync_ExistingCheckpoint_ReturnsCorrectValueAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
var originalData = new { message = "Hello, World!", timestamp = DateTimeOffset.UtcNow };
var checkpointValue = JsonSerializer.SerializeToElement(originalData, s_jsonOptions);
// Act
var checkpointInfo = await store.CreateCheckpointAsync(runId, checkpointValue);
var retrievedValue = await store.RetrieveCheckpointAsync(runId, checkpointInfo);
// Assert
Assert.Equal(JsonValueKind.Object, retrievedValue.ValueKind);
Assert.True(retrievedValue.TryGetProperty("message", out var messageProp));
Assert.Equal("Hello, World!", messageProp.GetString());
}
[SkippableFact]
public async Task RetrieveCheckpointAsync_NonExistentCheckpoint_ThrowsInvalidOperationExceptionAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
var fakeCheckpointInfo = new CheckpointInfo(runId, "nonexistent-checkpoint");
// Act & Assert
await Assert.ThrowsAsync<InvalidOperationException>(() =>
store.RetrieveCheckpointAsync(runId, fakeCheckpointInfo).AsTask());
}
[SkippableFact]
public async Task RetrieveIndexAsync_EmptyStore_ReturnsEmptyCollectionAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
// Act
var index = await store.RetrieveIndexAsync(runId);
// Assert
Assert.NotNull(index);
Assert.Empty(index);
}
[SkippableFact]
public async Task RetrieveIndexAsync_WithCheckpoints_ReturnsAllCheckpointsAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Create multiple checkpoints
var checkpoint1 = await store.CreateCheckpointAsync(runId, checkpointValue);
var checkpoint2 = await store.CreateCheckpointAsync(runId, checkpointValue);
var checkpoint3 = await store.CreateCheckpointAsync(runId, checkpointValue);
// Act
var index = (await store.RetrieveIndexAsync(runId)).ToList();
// Assert
Assert.Equal(3, index.Count);
Assert.Contains(index, c => c.CheckpointId == checkpoint1.CheckpointId);
Assert.Contains(index, c => c.CheckpointId == checkpoint2.CheckpointId);
Assert.Contains(index, c => c.CheckpointId == checkpoint3.CheckpointId);
}
[SkippableFact]
public async Task CreateCheckpointAsync_WithParent_CreatesHierarchyAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Act
var parentCheckpoint = await store.CreateCheckpointAsync(runId, checkpointValue);
var childCheckpoint = await store.CreateCheckpointAsync(runId, checkpointValue, parentCheckpoint);
// Assert
Assert.NotEqual(parentCheckpoint.CheckpointId, childCheckpoint.CheckpointId);
Assert.Equal(runId, parentCheckpoint.RunId);
Assert.Equal(runId, childCheckpoint.RunId);
}
[SkippableFact]
public async Task RetrieveIndexAsync_WithParentFilter_ReturnsFilteredResultsAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Create parent and child checkpoints
var parent = await store.CreateCheckpointAsync(runId, checkpointValue);
var child1 = await store.CreateCheckpointAsync(runId, checkpointValue, parent);
var child2 = await store.CreateCheckpointAsync(runId, checkpointValue, parent);
// Create an orphan checkpoint
var orphan = await store.CreateCheckpointAsync(runId, checkpointValue);
// Act
var allCheckpoints = (await store.RetrieveIndexAsync(runId)).ToList();
var childrenOfParent = (await store.RetrieveIndexAsync(runId, parent)).ToList();
// Assert
Assert.Equal(4, allCheckpoints.Count); // parent + 2 children + orphan
Assert.Equal(2, childrenOfParent.Count); // only children
Assert.Contains(childrenOfParent, c => c.CheckpointId == child1.CheckpointId);
Assert.Contains(childrenOfParent, c => c.CheckpointId == child2.CheckpointId);
Assert.DoesNotContain(childrenOfParent, c => c.CheckpointId == parent.CheckpointId);
Assert.DoesNotContain(childrenOfParent, c => c.CheckpointId == orphan.CheckpointId);
}
#endregion
#region Run Isolation Tests
[SkippableFact]
public async Task CheckpointOperations_DifferentRuns_IsolatesDataAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId1 = Guid.NewGuid().ToString();
var runId2 = Guid.NewGuid().ToString();
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Act
var checkpoint1 = await store.CreateCheckpointAsync(runId1, checkpointValue);
var checkpoint2 = await store.CreateCheckpointAsync(runId2, checkpointValue);
var index1 = (await store.RetrieveIndexAsync(runId1)).ToList();
var index2 = (await store.RetrieveIndexAsync(runId2)).ToList();
// Assert
Assert.Single(index1);
Assert.Single(index2);
Assert.Equal(checkpoint1.CheckpointId, index1[0].CheckpointId);
Assert.Equal(checkpoint2.CheckpointId, index2[0].CheckpointId);
Assert.NotEqual(checkpoint1.CheckpointId, checkpoint2.CheckpointId);
}
#endregion
#region Error Handling Tests
[SkippableFact]
public async Task CreateCheckpointAsync_WithNullRunId_ThrowsArgumentExceptionAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Act & Assert
await Assert.ThrowsAsync<ArgumentException>(() =>
store.CreateCheckpointAsync(null!, checkpointValue).AsTask());
}
[SkippableFact]
public async Task CreateCheckpointAsync_WithEmptyRunId_ThrowsArgumentExceptionAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Act & Assert
await Assert.ThrowsAsync<ArgumentException>(() =>
store.CreateCheckpointAsync("", checkpointValue).AsTask());
}
[SkippableFact]
public async Task RetrieveCheckpointAsync_WithNullCheckpointInfo_ThrowsArgumentNullExceptionAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
using var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var runId = Guid.NewGuid().ToString();
// Act & Assert
await Assert.ThrowsAsync<ArgumentNullException>(() =>
store.RetrieveCheckpointAsync(runId, null!).AsTask());
}
#endregion
#region Disposal Tests
[SkippableFact]
public async Task Dispose_AfterDisposal_ThrowsObjectDisposedExceptionAsync()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
var checkpointValue = JsonSerializer.SerializeToElement(new { data = "test" }, s_jsonOptions);
// Act
store.Dispose();
// Assert
await Assert.ThrowsAsync<ObjectDisposedException>(() =>
store.CreateCheckpointAsync("test-run", checkpointValue).AsTask());
}
[SkippableFact]
public void Dispose_MultipleCalls_DoesNotThrow()
{
this.SkipIfEmulatorNotAvailable();
// Arrange
var store = new CosmosCheckpointStore(this._cosmosClient!, s_testDatabaseId, TestContainerId);
// Act & Assert (should not throw)
store.Dispose();
store.Dispose();
store.Dispose();
}
#endregion
public void Dispose()
{
this.Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
this._cosmosClient?.Dispose();
}
}
}
@@ -0,0 +1,18 @@
// Copyright (c) Microsoft. All rights reserved.
using Xunit;
namespace Microsoft.Agents.AI.CosmosNoSql.UnitTests;
/// <summary>
/// Defines a collection fixture for Cosmos DB tests to ensure they run sequentially.
/// This prevents race conditions and resource conflicts when tests create and delete
/// databases in the Cosmos DB Emulator.
/// </summary>
[CollectionDefinition("CosmosDB", DisableParallelization = true)]
public sealed class CosmosDBCollectionFixture
{
// This class has no code, and is never created. Its purpose is simply
// to be the place to apply [CollectionDefinition] and all the
// ICollectionFixture<> interfaces.
}
@@ -0,0 +1,24 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFrameworks>net10.0;net9.0</TargetFrameworks>
<NoWarn>$(NoWarn);MEAI001</NoWarn>
</PropertyGroup>
<PropertyGroup Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">
<JsonSerializerIsReflectionEnabledByDefault>false</JsonSerializerIsReflectionEnabledByDefault>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\..\src\Microsoft.Agents.AI.CosmosNoSql\Microsoft.Agents.AI.CosmosNoSql.csproj" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="System.Text.Json" />
<PackageReference Include="System.Linq.AsyncEnumerable" />
<PackageReference Include="Azure.Identity" />
<PackageReference Include="Microsoft.Azure.Cosmos" />
<PackageReference Include="Xunit.SkippableFact" />
</ItemGroup>
</Project>