fix : enable service injection in A2ASendMessageExecutor for A2A runner

[prasadskarmarkar]

Fixes #677

Updated A2ASendMessageExecutor and A2ARemoteConfiguration to support dependency injection of session, artifact, and memory services. This allows persistent service implementations to replace hard-coded in-memory versions.

Changes:

• Modified A2ASendMessageExecutor constructor to accept BaseSessionService, BaseArtifactService, and BaseMemoryService parameters
• Updated A2ARemoteConfiguration to autowire service beans with fallback to in-memory defaults when custom beans are not provided
• Added comprehensive test coverage for service injection scenarios

Tasks

• Update A2ASendMessageExecutor to accept injected services
• Modify A2ARemoteConfiguration to autowire service beans
• Add unit tests for A2ASendMessageExecutor
• Add integration tests for service injection
• Add Spring configuration tests for custom services
• Address code review feedback

[gemini-code-assist]

Summary of Changes

Hello @prasadskarmarkar, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the A2ASendMessageExecutor by introducing dependency injection for its core services. This change allows for greater flexibility and extensibility, enabling developers to easily swap out default in-memory service implementations with custom, potentially persistent or distributed, alternatives. The A2ARemoteConfiguration has been updated to seamlessly integrate with this new design, automatically wiring available service beans while gracefully falling back to in-memory versions if no custom implementations are found. This refactoring improves the modularity and testability of the A2A runner component.

Highlights

• Service Injection Enabled: The A2ASendMessageExecutor now supports dependency injection for BaseSessionService, BaseArtifactService, and BaseMemoryService, allowing replacement of hard-coded in-memory implementations.
• Flexible Configuration: A2ARemoteConfiguration has been updated to autowire these services, providing a graceful fallback to in-memory defaults if custom beans are not explicitly provided in the Spring context.
• Comprehensive Testing: New unit, integration, and Spring configuration tests have been added to thoroughly validate the correct behavior of service injection and fallback mechanisms.

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[gemini-code-assist]

Code Review

This pull request successfully implements dependency injection for "A2ASendMessageExecutor", enhancing its flexibility by allowing external services to be provided. The changes in "A2ASendMessageExecutor.java" correctly update the constructor to accept "Base*Service" interfaces, and the extensive Javadoc clearly explains the new injection model. The "A2ARemoteConfiguration.java" effectively integrates these changes with Spring's autowiring, providing sensible fallbacks to in-memory implementations when custom beans are not supplied. Comprehensive test coverage, including unit, integration, and Spring configuration tests, ensures the robustness of the new functionality. The "pom.xml" updates correctly add necessary test dependencies.

[prasadskarmarkar]

/gemini review

[gemini-code-assist]

Code Review

This pull request refactors A2ASendMessageExecutor and A2ARemoteConfiguration to support dependency injection for services, which is a great improvement for flexibility and testability. The changes are well-implemented, using base interfaces and providing sensible defaults with @ConditionalOnMissingBean in the Spring configuration. The test coverage is comprehensive, including unit, integration, and Spring configuration tests. My feedback focuses on improving the maintainability and robustness of the new test code by reducing duplication and adding more specific assertions.