fix: Avoid NPE for gRPC when acceptedOutputModes isn't specified for the client side #256
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Summary of Changes
Hello @fjuma, 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 addresses a potential NullPointerException in gRPC communication by enhancing the handling of unspecified acceptedOutputModes fields. The changes ensure that the system gracefully manages cases where this configuration is absent, improving the robustness of the gRPC client-side message processing.
Highlights
- gRPC NullPointerException Fix: Implemented null checks for acceptedOutputModes in ProtoUtils.java to prevent NullPointerException when this field is not specified in gRPC SendMessageConfiguration on the client side.
- gRPC Data Mapping Consistency: Adjusted the mapping logic in ProtoUtils.java to correctly handle cases where acceptedOutputModes is empty, ensuring it's treated as null for consistency with the new null checks.
- Test Case Adjustment: Modified AbstractA2AServerTest.java to remove the default setting of acceptedOutputModes in a test utility method, allowing for better testing of scenarios where this field is not explicitly set.
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Code Review
This pull request fixes a NullPointerException that occurs in the gRPC layer when acceptedOutputModes is not specified by the client. The fix involves adding a null check before processing acceptedOutputModes and ensuring consistency in handling empty vs. null lists when converting between Protobuf and spec objects. The changes look correct and effectively address the issue. I've added a couple of minor suggestions to improve code clarity and maintainability in ProtoUtils.java.
| if (messageSendConfiguration.acceptedOutputModes() != null) { | ||
| builder.addAllAcceptedOutputModes(messageSendConfiguration.acceptedOutputModes()); | ||
| } |
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To make this null check more concise and avoid calling acceptedOutputModes() twice, you could use java.util.Optional. This would also make the intent clearer.
java.util.Optional.ofNullable(messageSendConfiguration.acceptedOutputModes()).ifPresent(builder::addAllAcceptedOutputModes);There was a problem hiding this comment.
Going to leave it as is to match what we're doing in the rest of this class.
| sendMessageConfiguration.getAcceptedOutputModesList().isEmpty() ? null : | ||
| new ArrayList<>(sendMessageConfiguration.getAcceptedOutputModesList()), |
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This code calls sendMessageConfiguration.getAcceptedOutputModesList() twice. While the performance impact is likely negligible here, it's a good practice to avoid duplicate method calls for readability and to prevent potential side-effects. Consider storing the list in a local variable before the return statement.
…the client side (a2aproject#256) # Description Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly: - [x] Follow the [`CONTRIBUTING` Guide](../CONTRIBUTING.md). - [x] Make your Pull Request title in the <https://www.conventionalcommits.org/> specification. - Important Prefixes for [release-please](https://github.com/googleapis/release-please): - `fix:` which represents bug fixes, and correlates to a [SemVer](https://semver.org/) patch. - `feat:` represents a new feature, and correlates to a SemVer minor. - `feat!:`, or `fix!:`, `refactor!:`, etc., which represent a breaking change (indicated by the `!`) and will result in a SemVer major. - [x] Ensure the tests pass - [x] Appropriate READMEs were updated (if necessary)
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Description
Thank you for opening a Pull Request!
Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
CONTRIBUTINGGuide.fix:which represents bug fixes, and correlates to a SemVer patch.feat:represents a new feature, and correlates to a SemVer minor.feat!:, orfix!:,refactor!:, etc., which represent a breaking change (indicated by the!) and will result in a SemVer major.