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Merged
YunchuWang merged 5 commits into from
Dec 6, 2025
Merged

Add entity source generation support for Durable Functions #533

YunchuWang merged 5 commits into from
Dec 6, 2025
+285 −24

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Copilot AI commented Dec 5, 2025 •
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The source generator was not producing Azure Function triggers for entities when using the class-based syntax with [DurableTask] attribute, unlike orchestrators and activities which already had this support.

Changes

  • DurableTaskSourceGenerator.cs: Added AddEntityFunctionDeclaration method that generates [EntityTrigger] function definitions for entity classes decorated with [DurableTask]
  • AzureFunctionsTests.cs: Added 6 tests covering entity generation with primitive types, inheritance, custom state types, and mixed orchestrator/activity/entity scenarios

Example

Given:

[DurableTask(nameof(MyEntity))]
public class MyEntity : TaskEntity<int>
{
    public int Get() => this.State;
}

The generator now produces:

[Function(nameof(MyEntity))]
public static Task MyEntity([EntityTrigger] TaskEntityDispatcher dispatcher)
{
    return dispatcher.DispatchAsync<MyEntity>();
}
Original prompt

add durable function entity source generation support and tests properly

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

Copilot AI changed the title [WIP] Add durable function entity source generation support and tests Add entity source generation support for Durable Functions Dec 5, 2025
Copilot AI requested a review from YunchuWang December 5, 2025 17:47
Copilot finished work on behalf of YunchuWang December 5, 2025 17:47
@YunchuWang YunchuWang marked this pull request as ready for review December 5, 2025 20:16
Copilot AI review requested due to automatic review settings December 5, 2025 20:16
Copilot AI reviewed Dec 5, 2025
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Pull request overview

This PR adds source generation support for Durable Task entities in Azure Functions scenarios. Previously, the source generator only produced function triggers for orchestrators and activities when using the class-based [DurableTask] attribute syntax. This change brings entities to feature parity by generating [EntityTrigger] function definitions.

Key Changes:

  • Added AddEntityFunctionDeclaration method to generate entity trigger functions
  • Added 4 comprehensive test methods covering primitive types, inheritance, custom state types, and mixed scenarios

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File Description
src/Generators/DurableTaskSourceGenerator.cs Added entity function generation logic in the Execute method and implemented the AddEntityFunctionDeclaration helper method following existing patterns
test/Generators.Tests/AzureFunctionsTests.cs Added 4 test methods validating entity generation across different scenarios including primitive types, inheritance, custom state types, and mixed orchestrator/activity/entity usage

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YunchuWang commented Dec 6, 2025

sample is fixed, all source generation work as expected
Functions:

    AzureFunctionsApp_HttpStart: [GET,POST] http://localhost:7071/api/AzureFunctionsApp_HttpStart

    Counter_Add: [POST] http://localhost:7071/api/counters/{id}/add/{value}

    Counter_Delete: [DELETE] http://localhost:7071/api/counters/{id}

    Counter_Get: [GET] http://localhost:7071/api/counters/{id}

    Counter_Reset: [POST] http://localhost:7071/api/counters/{id}/reset

    DeleteUser: [DELETE] http://localhost:7071/api/users/{id}

    Fib: [POST] http://localhost:7071/api/Fib

    GetUser: [GET] http://localhost:7071/api/users/{id}

    Greeting: [POST] http://localhost:7071/api/Greeting

    GreetUser: [POST] http://localhost:7071/api/users/{id}/greet

    Lifetime_Delete: [DELETE] http://localhost:7071/api/lifetimes/{id}

    Lifetime_Get: [GET] http://localhost:7071/api/lifetimes/{id}

    Lifetime_Init: [PUT] http://localhost:7071/api/lifetimes/{id}

    PatchUser: [PATCH] http://localhost:7071/api/users/{id}

    PutUser: [PUT] http://localhost:7071/api/users/{id}

    StartHelloCitiesTyped: [GET,POST] http://localhost:7071/api/StartHelloCitiesTyped

    StartHelloCitiesUntyped: [GET,POST] http://localhost:7071/api/StartHelloCitiesUntyped     

    AzureFunctionsApp: orchestrationTrigger

    Counter: entityTrigger

    CounterOrchestration: orchestrationTrigger

    Counter_Alt: entityTrigger

    Counter_Manual: entityTrigger

    Counter_State: entityTrigger

    FibActivity: activityTrigger

    FibOrchestration: orchestrationTrigger

    GreetingActivity: activityTrigger

    GreetingOrchestration: orchestrationTrigger

    HelloCitiesTyped: orchestrationTrigger

    HelloCitiesUntyped: orchestrationTrigger

    Lifetime: entityTrigger

    SayHello: activityTrigger

    SayHelloTyped: activityTrigger

    SayHelloUntyped: activityTrigger

    User: entityTrigger

@YunchuWang YunchuWang merged commit 8ae62ae into main Dec 6, 2025
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@YunchuWang YunchuWang deleted the copilot/add-entity-source-generation-support branch December 6, 2025 00:16
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@kaibocai kaibocai kaibocai approved these changes

@YunchuWang YunchuWang Awaiting requested review from YunchuWang

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@YunchuWang @kaibocai