Package org.axonframework.queryhandling

Interface Summary

Interface	Description
QueryBus	The mechanism that dispatches Query objects to their appropriate QueryHandlers.
QueryBusSpanFactory	Span factory that creates spans for the QueryBus.
QueryGateway	Interface towards the Query Handling components of an application.
QueryHandlerAdapter	Describes a class capable of subscribing to the query bus.
QueryInvocationErrorHandler	Interface describing a mechanism for the QueryMessage components to report errors.
QueryMessage<T,R>	Message type that carries a Query: a request for information.
QueryResponseMessage<T>	Message that contains the results of a Query.
QueryUpdateEmitter	Component which informs subscription queries about updates, errors and when there are no more updates.
QueryUpdateEmitterSpanFactory	Span factory that creates spans for the QueryUpdateEmitter.
SinkWrapper<T>	Abstraction interface to bridge old FluxSink and Sinks.Many API with a common API.
StreamingQueryMessage<Q,R>	A special type of QueryMessage used for initiating streaming queries.
SubscriptionQueryMessage<Q,I,U>	Message type that carries a Subscription Query: a request for information.
SubscriptionQueryResult<I,U>	Result of the subscription query.
SubscriptionQueryUpdateMessage<U>	Message which holds incremental update of an subscription query.

Class Summary

Class	Description
DefaultQueryBusSpanFactory	Default implementation of the QueryBusSpanFactory.
DefaultQueryBusSpanFactory.Builder	Builder class to instantiate a DefaultQueryBusSpanFactory.
DefaultQueryGateway	Implementation of the QueryGateway interface that allows the registration of dispatchInterceptors.
DefaultQueryGateway.Builder	Builder class to instantiate a DefaultQueryGateway.
DefaultQueryUpdateEmitterSpanFactory	Default implementation of the QueryUpdateEmitterSpanFactory.
DefaultQueryUpdateEmitterSpanFactory.Builder	Builder class to instantiate a DefaultQueryUpdateEmitterSpanFactory.
DefaultSubscriptionQueryResult<I,U>	Default implementation of SubscriptionQueryResult.
GenericQueryMessage<T,R>	Generic implementation of the QueryMessage.
GenericQueryResponseMessage<R>	QueryResponseMessage implementation that takes all properties as constructor parameters.
GenericStreamingQueryMessage<Q,R>	Generic implementation of the StreamingQueryMessage.
GenericSubscriptionQueryMessage<Q,I,U>	Generic implementation of the SubscriptionQueryMessage.
GenericSubscriptionQueryUpdateMessage<U>	Generic SubscriptionQueryUpdateMessage which holds incremental update of an subscription query.
LoggingQueryInvocationErrorHandler	Implementation of the QueryInvocationErrorHandler that logs all errors to a given Logger.
LoggingQueryInvocationErrorHandler.Builder	Builder class to instantiate a LoggingQueryInvocationErrorHandler.
QuerySubscription<R>	Encapsulates the identifying fields of a Query Handler when one is subscribed to the QueryBus.
SimpleQueryBus	Implementation of the QueryBus that dispatches queries to the handlers within the JVM.
SimpleQueryBus.Builder	Builder class to instantiate a SimpleQueryBus.
SimpleQueryUpdateEmitter	Implementation of QueryUpdateEmitter that uses Project Reactor to implement Update Handlers.
SimpleQueryUpdateEmitter.Builder	Builder class to instantiate a SimpleQueryUpdateEmitter.
SubscriptionQueryBackpressure	Deprecated since 3.4.0 Reactor version, Sinks API does not use FluxSink.OverflowStrategy
UpdateHandlerRegistration<U>	Result of registering an Update Handler.

Exception Summary

Exception	Description
CompletedEmitterException	Exception indicating that QueryUpdateEmitter is completed, thus cannot be used to emit messages and report errors.
NoHandlerForQueryException	Exception indicating a query for a single result was executed, but no handlers were found that could provide an answer.
QueryExecutionException	Exception indicating that the execution of a Query Handler has resulted in an exception.

Annotation Types Summary

Annotation Type	Description
QueryHandler	Marker annotation to mark any method on an object as being a QueryHandler.