Package dev.langchain4j.observability.api.event

@Experimental @NullMarked package dev.langchain4j.observability.api.event

Related Packages

Package	Description
dev.langchain4j.observability.api
dev.langchain4j.observability.api.listener

Class	Description
AiServiceCancelledEvent	Invoked when an AI Service invocation is cancelled before it completes, for example when the Flow.Publisher subscription is cancelled, the returned CompletableFuture is cancelled, or StreamingHandle.cancel() is called from a TokenStream callback that receives a context, such as onPartialResponseWithContext.
AiServiceCancelledEvent.AiServiceCancelledEventBuilder	Builder for AiServiceCancelledEvent instances.
AiServiceCompletedEvent	Represents an event that occurs upon the completion of an invocation.
AiServiceCompletedEvent.AiServiceCompletedEventBuilder	Builder for DefaultAiServiceCompletedEvent instances.
AiServiceErrorEvent	Represents an event that occurs when an AI Service invocation fails.
AiServiceErrorEvent.AiServiceErrorEventBuilder	Builder for DefaultAiServiceErrorEvent instances.
AiServiceEvent
AiServiceEvent.Builder<T extends AiServiceEvent>	An abstract base class for building instances of types that extend AiServiceEvent.
AiServiceInvocationSummaryEvent	A composite event summarizing a single AI Service invocation: all the events fired for it.
AiServiceInvocationSummaryEvent.AiServiceInvocationSummaryEventBuilder	Builder for AiServiceInvocationSummaryEvent instances.
AiServiceRequestIssuedEvent	Invoked just before a ChatRequest is sent.
AiServiceRequestIssuedEvent.AiServiceRequestIssuedEventBuilder	Builder for DefaultAiServiceResponseReceivedEvent instances.
AiServiceResponseReceivedEvent	Invoked when response from a ChatModel is received.
AiServiceResponseReceivedEvent.AiServiceResponseReceivedEventBuilder	Builder for DefaultAiServiceResponseReceivedEvent instances.
AiServiceStartedEvent	Called when an LLM invocation has started.
AiServiceStartedEvent.AiServiceStartedEventBuilder	Builder for DefaultAiServiceStartedEvent instances.
CompensationReason	Why a successfully-executed tool was compensated (rolled back).
GuardrailExecutedEvent<P extends GuardrailRequest<P>, R extends GuardrailResult<R>, G extends Guardrail<P,R>>	Represents an event that is executed when a guardrail validation occurs.
GuardrailExecutedEvent.GuardrailExecutedEventBuilder<P extends GuardrailRequest<P>, R extends GuardrailResult<R>, G extends Guardrail<P,R>, T extends GuardrailExecutedEvent<P,R,G>>
InputGuardrailExecutedEvent	Represents an event that is triggered upon the execution of an input guardrail validation.
InputGuardrailExecutedEvent.InputGuardrailExecutedEventBuilder	Builder for InputGuardrailExecutedEvent instances.
OutputGuardrailExecutedEvent	Represents an event executed during the output guardrail validation process.
OutputGuardrailExecutedEvent.OutputGuardrailExecutedEventBuilder	Builder for OutputGuardrailExecutedEvent instances.
RetrievalAugmentedEvent	Invoked once per invocation of an AI Service that uses retrieval-augmented generation (RAG), configured with contentRetriever(...) or retrievalAugmentor(...), after the contents to add to the user message were retrieved, also when nothing was retrieved.
RetrievalAugmentedEvent.RetrievalAugmentedEventBuilder	Builder for RetrievalAugmentedEvent instances.
ToolCompensatedEvent	Invoked after a successfully-executed tool is compensated (rolled back) - for example when another tool in the same round failed, or when the invocation was cancelled.
ToolCompensatedEvent.ToolCompensatedEventBuilder
ToolExecutedEvent	Invoked after the tool is executed.
ToolExecutedEvent.ToolExecutedEventBuilder