feat(inst/langchain4j): add LangChain4j 1.0 phase attribution instrumentation#11530
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jbachorik wants to merge 1 commit into
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feat(inst/langchain4j): add LangChain4j 1.0 phase attribution instrumentation#11530jbachorik wants to merge 1 commit into
jbachorik wants to merge 1 commit into
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PerfectSlayer
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tag: ai generated
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What Does This Do
New instrumentation module
dd-java-agent/instrumentation/langchain4j/langchain4j-1.0with threeInstrumenterModule.Profilinghooks tagging LangChain4j 1.0 pipeline boundaries:ChatModelInstrumentationChatModel#chat(ChatRequest)— all implementationsawaiting_inferenceToolExecutorInstrumentationToolExecutor#execute(ToolExecutionRequest, Object)tool_executionAiServicesInstrumentationDefaultAiServices$1#invoke(...)(anonymous InvocationHandler)context_buildEach advice sets
llm.agent.phaseon enter viaProfiling.get().newScope().setContextValue(...)and clears on exit. Muzzle passes LC4j versions 1.0.0–1.15.1.Motivation
LangChain4j uses its own HTTP client — the existing OpenAI Java SDK instrumentation does not fire on LC4j calls. Without this module, CPU flamegraphs from LC4j services show undifferentiated work.
Part of PROF-14858. Stacked on #11529 (DatadogProfiler slot). Next: [ddt-4-demo] (demo app).
Additional Notes
TargetSystem.PROFILINGis enabled (InstrumenterModule.Profiling).ToolExecutoris atdev.langchain4j.service.tool(notagent.toolas the spec guessed).DefaultAiServices$1.langchain4j-ollama1.0.0 does not exist in Maven Central; earliest 1.x is 1.2.0.Contributor Checklist
type:and (comp:orinst:) labels in addition to any other useful labelsclose,fix, or any linking keywords when referencing an issueUse
solvesinstead, and assign the PR milestone to the issue/merge. You can also:/merge --commit-message "..."/merge -c/merge -f --reason "reason"; please use this judiciously, as some checks do not run at the PR-levelJira ticket: PROF-14863