A2A Jakarta 1.0.0.Final is released!
I am pleased to announce the 1.0.0.Final release of A2A Jakarta, the Jakarta integration for the A2A Java SDK.
A2A Jakarta supports version 1.0 of the A2A Protocol Specification and provides Jakarta integrations for the JSON-RPC, gRPC, and HTTP+JSON/REST transports. It also includes a compatibility layer for version 0.3 of the protocol, allowing v0.3 and v1.0 clients to be served by the same deployment.
Aligned with a2a-java 1.3.2.Final
This release is built on a2a-java 1.3.2.Final. Since the previous A2A Jakarta release, the a2a-java SDK has introduced:
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Multi-tenancy support, allowing an agent to provide different
AgentCardandAgentExecutorimplementations for different tenants. -
An authorization model that fails closed by default, together with additional security hardening such as authorization checks when accessing referenced tasks.
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Stream lifecycle management and deeper immutability for protocol types.
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Several protocol-compliance and transport fixes.
See the a2a-java 1.3.0.Final announcement and the 1.2.0.Final announcement for more details on the upstream changes.
A2A Jakarta exposes the multi-tenancy support across all three transports, with integration tests for JSON-RPC, REST, and gRPC. The release also includes fixes for streamed events, REST interoperability, and the handling of internal error messages.
Enterprise example
The new enterprise example demonstrates how to run an A2A agent across two WildFly nodes. It uses JPA-backed task and push-notification stores together with a Kafka-backed replicated queue manager, showing how task state and live events can be shared between nodes in a load-balanced deployment. The stores and queue manager are provided by a2a-java.
The release has been tested with WildFly 41.0.1.Final.
Looking ahead
A2A Jakarta is intended to make the A2A Java SDK available to applications running on Jakarta-compatible servers, including WildFly, Tomcat, Jetty, and Open Liberty. For WildFly users, we are working towards a wildfly-a2a-feature-pack that will package the A2A Jakarta integration, the a2a-java SDK, and their runtime dependencies in a more convenient form. We will share more details when that work is ready.
For more information, see the project repository and its README. If you have any issues with the project, please open an issue. Pull requests are welcome!
