Interface HandlerMethod<M>

Type Parameters:

M - the message type

All Superinterfaces:

HandlerDescriptor

All Known Implementing Classes:

HandlerMethod.DelegatingHandlerMethod

public interface HandlerMethod<M>
extends HandlerDescriptor

A reusable, target-bound handler method.

Unlike a HandlerInvoker, a HandlerMethod is not resolved for one specific message. It can be checked and invoked repeatedly for messages that match the same method and target.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	HandlerMethod.DelegatingHandlerMethod<M>	A HandlerMethod that delegates all behavior to another instance.

Method Summary

Modifier and Type	Method	Description
boolean	canHandle(M message)	Returns whether this method can handle the supplied message.
default Object	invoke(M message)	Invokes this handler method for the supplied message using the default result-combining strategy.
Object	invoke(M message, BiFunction<Object,Object,Object> resultCombiner)	Invokes this handler method for the supplied message and combines multiple results using the given combiner.

Methods inherited from interface HandlerDescriptor

expectResult, getMethod, getMethodAnnotation, getTargetClass, isPassive

Method Details

canHandle

boolean canHandle(M message)

Returns whether this method can handle the supplied message.

Parameters:

message - the message to check

Returns:

true if this handler method can handle the message

invoke

default Object invoke(M message)

Invokes this handler method for the supplied message using the default result-combining strategy.

Parameters:

message - the message to handle

Returns:

the handler result

invoke

Object invoke(M message,
 BiFunction<Object,Object,Object> resultCombiner)

Invokes this handler method for the supplied message and combines multiple results using the given combiner.

Parameters:

message - the message to handle

resultCombiner - function to combine multiple results

Returns:

the handler result