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@ehsavoie ehsavoie commented Dec 5, 2025

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Fixes #<issue_number_goes_here> 🦕

Signed-off-by: Emmanuel Hugonnet <ehugonne@redhat.com>
@ehsavoie ehsavoie requested a review from kabir December 5, 2025 09:46
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Summary of Changes

Hello @ehsavoie, 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 enhances the extensibility of the event queue mechanism by making key methods public, thereby allowing external components to more easily interact with and customize event processing. Additionally, it improves the debuggability of message events by providing a detailed string representation.

Highlights

  • Event Queue Overridability: The signalQueuePollerStarted() and tap() methods in the EventQueue abstract class and its implementations (MainQueue, ChildQueue) have been changed from package-private to public, allowing for greater flexibility and overridability of event queue behavior.
  • Improved MessageEvent Logging: A toString() method has been added to the MessageEvent class, providing a comprehensive string representation of the event and its encapsulated message for easier debugging and logging.
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ehsavoie commented Dec 5, 2025

Backport of #473 to allow for the timestamp extension

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Code Review

This pull request primarily focuses on enhancing the extensibility of the EventQueue by adjusting access modifiers of several abstract methods to public. This change allows for greater flexibility when overriding or implementing these methods in different packages, aligning with the goal of making the event queue overridable. Additionally, a toString() method has been added to MessageEvent for improved debugging and logging capabilities.

Comment on lines +27 to +36
String messageAsString = "{"
+ "role=" + message.getRole()
+ ", parts=" + message.getParts()
+ ", messageId=" + message.getMessageId()
+ ", contextId=" + message.getContextId()
+ ", taskId=" + message.getTaskId()
+ ", metadata=" + message.getMetadata()
+ ", kind=" + message.getKind()
+ ", referenceTaskIds=" + message.getReferenceTaskIds()
+ ", extensions=" + message.getExtensions() + '}';
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medium

Using StringBuilder for constructing the messageAsString will be more efficient and performant than repeated string concatenation with the + operator, especially if the Message object contains many fields or if this toString() method is called frequently. This is a common Java best practice for string building.

        String messageAsString = new StringBuilder("{")
                .append("role=").append(message.getRole())
                .append(", parts=").append(message.getParts())
                .append(", messageId=").append(message.getMessageId())
                .append(", contextId=").append(message.getContextId())
                .append(", taskId=").append(message.getTaskId())
                .append(", metadata=").append(message.getMetadata())
                .append(", kind=").append(message.getKind())
                .append(", referenceTaskIds=").append(message.getReferenceTaskIds())
                .append(", extensions=").append(message.getExtensions())
                .append('}')
                .toString();

@jmesnil jmesnil added the 0.3.x label Dec 10, 2025
@kabir kabir merged commit c2551bc into a2aproject:0.3.x Dec 12, 2025
10 checks passed
@ehsavoie ehsavoie deleted the extensible_0.3.x branch December 19, 2025 16:23
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3 participants