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@kdubois kdubois commented Nov 19, 2025

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@kdubois kdubois requested a review from mariofusco November 19, 2025 11:34
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kdubois commented Nov 19, 2025

@mariofusco I updated to version 1.4.1 but it required me to rename outputName to outputKey which then uncovered some other issues. Can you review and let me know if this makes sense?

@kdubois kdubois changed the title Update step04 to Quarkus langchain4j 1.4.1 Update Quarkus langchain4j 1.4.1 Nov 19, 2025
@kdubois kdubois changed the title Update Quarkus langchain4j 1.4.1 Update Quarkus LangChain4j 1.4.1 Nov 19, 2025
<langchain4j.version>1.6.0</langchain4j.version>
<langchain4j.beta.version>1.8.0-beta15</langchain4j.beta.version>
<a2a.version>0.3.2.Final</a2a.version>
<a2a.version>0.3.0.Beta1</a2a.version>
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I had to roll back the version since even the latest beta of langchain4j-agentic-a2a is still using the 0.3.0.Beta1 version.

2025-11-19 12:22:29,089 ERROR [io.qua.ver.htt.run.QuarkusErrorHandler] (vert.x-eventloop-thread-0) HTTP Request to / failed, error id: 58f0b5b3-a236-42c7-9b0d-9841340a3d95-1: java.lang.NoSuchMethodError: 'java.lang.String io.a2a.util.Utils.toJsonString(java.lang.Object)'

)
@Agent(description = "Car disposition specialist. Determines how to dispose of a car.",
outputKey = "dispositionAgentResult")
@A2AClientAgent(a2aServerUrl = "http://localhost:8888")
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The previous way of defining the outputKey in the A2AClientAgent didn't work anymore. This seems to work. Let me know if it's the correct implementation :)

@mariofusco mariofusco merged commit 5cfe58a into main Nov 19, 2025
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@mariofusco mariofusco deleted the quarkus-langchain4j-141-step04 branch November 19, 2025 15:35
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3 participants