Package org.axonframework.messaging.eventhandling.tracing

Class TracingEventHandlingComponent

java.lang.Object

org.axonframework.messaging.eventhandling.DelegatingEventHandlingComponent

org.axonframework.messaging.eventhandling.tracing.TracingEventHandlingComponent

All Implemented Interfaces:

DescribableComponent, MessageHandler, EventHandler, EventHandlingComponent

public class TracingEventHandlingComponent
extends DelegatingEventHandlingComponent

An EventHandlingComponent that tracks the handling of events using a Span supplier.

It delegates the actual event handling to another EventHandlingComponent while tracking the events processed.

Since:

5.0.0

Author:

Allard Buijze, Mateusz Nowak, Mitchell Herrijgers, Steven van Beelen

Field Summary

Fields inherited from class org.axonframework.messaging.eventhandling.DelegatingEventHandlingComponent

delegate

Constructor Summary

Constructors

Constructor	Description
TracingEventHandlingComponent(Function<EventMessage,Span> spanProvider, EventHandlingComponent delegate)	Constructs the component with given delegate to receive calls.

Method Summary

Modifier and Type	Method	Description
MessageStream.Empty<Message>	handle(EventMessage event, ProcessingContext context)	Handles the given event within the given context.

Methods inherited from class org.axonframework.messaging.eventhandling.DelegatingEventHandlingComponent

describeTo, sequenceIdentifierFor, supportedEvents, supports

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TracingEventHandlingComponent

public TracingEventHandlingComponent(@Nonnull
 Function<EventMessage,Span> spanProvider,
 @Nonnull
 EventHandlingComponent delegate)

Constructs the component with given delegate to receive calls.

Parameters:

spanProvider - The provider of Span to track the event handling.

delegate - The instance to delegate calls to.

Method Details

handle

@Nonnull
public MessageStream.Empty<Message> handle(@Nonnull
 EventMessage event,
 @Nonnull
 ProcessingContext context)

Description copied from interface: EventHandler

Handles the given event within the given context.

The result of handling is an empty stream.

Specified by:

handle in interface EventHandler

Overrides:

handle in class DelegatingEventHandlingComponent

Parameters:

event - The event to handle.

context - The context to the given event is handled in.

Returns:

An empty stream containing nothing.