feat: update grpc-java to the newer version; handle introduced StatusException

[anFatum]

Description

Update the grpc-java used to the latest available release - 1.77. It introduces the StatusException on the BlockingClientCall, add adjustments for this case as well.

I've run the tests and they all finished successfully:

[INFO] --------------------------------[ pom ]---------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for Java SDK A2A Parent 0.4.0.Alpha1-SNAPSHOT:
[INFO] 
[INFO] Java SDK A2A Parent ................................ SUCCESS [  0.006 s]
[INFO] A2A Java SDK - BOM Test Utilities .................. SUCCESS [  1.071 s]
[INFO] Java SDK A2A Common ................................ SUCCESS [  0.211 s]
[INFO] Java SDK A2A Spec .................................. SUCCESS [  1.999 s]
[INFO] Java SDK A2A HTTP Client ........................... SUCCESS [  1.993 s]
[INFO] Java SDK A2A Client Transport: SPI ................. SUCCESS [  0.777 s]
[INFO] Java SDK A2A Client Transport: JSONRPC ............. SUCCESS [  5.879 s]
[INFO] Java SDK A2A Spec: gRPC ............................ SUCCESS [  1.466 s]
[INFO] Java SDK A2A Client Transport: gRPC ................ SUCCESS [  0.058 s]
[INFO] Java SDK A2A Client Transport: JSON+HTTP/REST ...... SUCCESS [  4.507 s]
[INFO] Java SDK A2A Client ................................ SUCCESS [  5.255 s]
[INFO] Java SDK A2A Examples: Hello World ................. SUCCESS [  0.019 s]
[INFO] Java SDK A2A Examples .............................. SUCCESS [  0.801 s]
[INFO] Java SDK A2A Core .................................. SUCCESS [ 16.824 s]
[INFO] Java A2A SDK Server Tests Common ................... SUCCESS [  0.094 s]
[INFO] A2A Java SDK - MicroProfile Config Integration ..... SUCCESS [  5.229 s]
[INFO] Java A2A Reference Server: Common .................. SUCCESS [  0.451 s]
[INFO] Java SDK A2A Transport: JSONRPC .................... SUCCESS [  3.347 s]
[INFO] Java A2A Reference Server: JSONRPC ................. SUCCESS [ 31.455 s]
[INFO] Java SDK A2A Examples .............................. SUCCESS [  1.216 s]
[INFO] A2A Java SDK :: Extras :: Common ................... SUCCESS [  0.023 s]
[INFO] Java A2A Extras: JPA Database TaskStore ............ SUCCESS [ 15.282 s]
[INFO] Java A2A Extras: JPA Database PushNotificationConfigStore SUCCESS [ 11.814 s]
[INFO] Java A2A Extras: Replicated Queue Manager Parent ... SUCCESS [  0.001 s]
[INFO] Java A2A Extras: Replicated Queue Manager Core ..... SUCCESS [  1.550 s]
[INFO] Java A2A Extras: Replicated Queue Manager MicroProfile Reactive Messaging SUCCESS [  2.447 s]
[INFO] A2A Java SDK - Cloud Deployment Example Server ..... SUCCESS [  1.379 s]
[INFO] Java A2A Extras: Replicated Queue Manager Tests - Single Instance SUCCESS [ 14.694 s]
[INFO] Java A2A Extras: Replicated Queue Manager Tests - Multi Instance Parent SUCCESS [  0.001 s]
[INFO] Java A2A Extras: Replicated Queue Manager Tests - Multi Instance Common SUCCESS [  0.032 s]
[INFO] Java A2A Extras: Replicated Queue Manager Tests - Multi Instance App 1 SUCCESS [  0.058 s]
[INFO] Java A2A Extras: Replicated Queue Manager Tests - Multi Instance App 2 SUCCESS [  0.058 s]
[INFO] Java A2A Extras: Replicated Queue Manager Tests - Multi Instance Tests SUCCESS [01:00 min]
[INFO] Java SDK A2A Transport: gRPC ....................... SUCCESS [  2.817 s]
[INFO] Java A2A Reference Server: gRPC .................... SUCCESS [ 26.423 s]
[INFO] Java SDK A2A Transport: JSON+HTTP/REST ............. SUCCESS [  1.915 s]
[INFO] Java A2A Reference Server: JSON+HTTP/REST .......... SUCCESS [ 29.314 s]
[INFO] Java SDK A2A TCK Server ............................ SUCCESS [  1.405 s]
[INFO] A2A Java SDK - BOM ................................. SUCCESS [  0.015 s]
[INFO] A2A Java SDK - Extras BOM .......................... SUCCESS [  0.001 s]
[INFO] A2A Java SDK - Reference Implementations BOM ....... SUCCESS [  0.000 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  04:16 min
[INFO] Finished at: 2025-11-26T14:02:51Z
[INFO] ------------------------------------------------------------------------

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Fixes #<issue_number_goes_here> 🦕

[gemini-code-assist]

Summary of Changes

Hello @anFatum, 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 focuses on a critical dependency update, upgrading the grpc-java library to its latest version, 1.77.0. This update necessitates changes to how gRPC errors are handled, specifically by accommodating the newly introduced StatusException in blocking client calls. The modifications ensure continued compatibility and reliable error propagation within the A2A client transport, maintaining the stability and functionality of gRPC communications.

Highlights

• gRPC Library Update: The grpc-java library has been updated to version 1.77.0, bringing the project up to date with the latest gRPC features and fixes.
• StatusException Handling: Introduced StatusException handling, which is a new exception type that can be thrown by blocking gRPC client calls in the updated library. This ensures robust error management across the gRPC transport layer.
• Generalized Error Mapping: The GrpcErrorMapper has been refactored to accept a more general Throwable type and utilize Status.fromThrowable(e), allowing it to correctly map both StatusRuntimeException and the newly introduced StatusException to internal A2A client exceptions.
• Blocking Client Call Signature Changes: All blocking gRPC client methods in A2AServiceGrpc.java now explicitly declare throws io.grpc.StatusException and use the io.grpc.stub.ClientCalls.blockingV2UnaryCall method, aligning with the updated gRPC API.

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[gemini-code-assist]

Code Review

The pull request successfully updates the grpc-java library to version 1.77.0 and correctly handles the newly introduced StatusException in the GrpcTransport and A2AServiceGrpc classes. The pom.xml update reflects the version change. The changes are well-contained and address the stated goal of the PR. One minor documentation update is suggested for clarity.

[anFatum]

/gemini review

[gemini-code-assist]

Code Review

This pull request successfully updates grpc-java to version 1.77.0 and adapts the codebase to handle the StatusException introduced in blocking calls. The changes are well-executed: the POM file is updated, the generated gRPC stub reflects the new exception signatures, GrpcTransport correctly catches both StatusRuntimeException and StatusException for blocking calls, and GrpcErrorMapper is appropriately generalized to handle any Throwable. The implementation is solid and addresses the core requirements of the library upgrade. I've included one suggestion to improve the maintainability of the error mapping logic.

[kabir]

Hi @anFatum we're currently working on a big refactoring touching gRPC. We will give your PR attention once that is in. Thanks!

[anFatum]

Thank you @kabir for an update!

[ehsavoie]

@anFatum Could you please rebase your changes