org.springframework.amqp.rabbit.listener.adapter

Class DelegatingInvocableHandler

java.lang.Object

org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler

public class DelegatingInvocableHandler
extends Object

Delegates to an InvocableHandlerMethod based on the message payload type. Matches a single, non-annotated parameter or one that is annotated with Payload. Matches must be unambiguous.

Since:

1.5

Author:

Gary Russell, Artem Bilan

Constructor Summary

Constructors

Constructor and Description
DelegatingInvocableHandler(List<InvocableHandlerMethod> handlers, InvocableHandlerMethod defaultHandler, Object bean, BeanExpressionResolver beanExpressionResolver, BeanExpressionContext beanExpressionContext) Construct an instance with the supplied handlers for the bean.
DelegatingInvocableHandler(List<InvocableHandlerMethod> handlers, Object bean, BeanExpressionResolver beanExpressionResolver, BeanExpressionContext beanExpressionContext) Construct an instance with the supplied handlers for the bean.

Method Summary

Modifier and Type	Method and Description
protected InvocableHandlerMethod	findHandlerForPayload(Class<? extends Object> payloadClass)
Object	getBean()
protected InvocableHandlerMethod	getHandlerForPayload(Class<? extends Object> payloadClass)
InvocationResult	getInvocationResultFor(Object result, Object inboundPayload)
Method	getMethodFor(Object payload) Return the method that will be invoked for this payload.
String	getMethodNameFor(Object payload) Return a string representation of the method that will be invoked for this payload.
boolean	hasDefaultHandler()
InvocationResult	invoke(Message<?> message, Object... providedArgs) Invoke the method with the given message.
protected boolean	matchHandlerMethod(Class<? extends Object> payloadClass, InvocableHandlerMethod handler)

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingInvocableHandler

public DelegatingInvocableHandler(List<InvocableHandlerMethod> handlers,
                                  Object bean,
                                  BeanExpressionResolver beanExpressionResolver,
                                  BeanExpressionContext beanExpressionContext)

Construct an instance with the supplied handlers for the bean.

Parameters:

handlers - the handlers.

bean - the bean.

beanExpressionResolver - the resolver.

beanExpressionContext - the context.

DelegatingInvocableHandler

public DelegatingInvocableHandler(List<InvocableHandlerMethod> handlers,
                                  @Nullable
                                  InvocableHandlerMethod defaultHandler,
                                  Object bean,
                                  BeanExpressionResolver beanExpressionResolver,
                                  BeanExpressionContext beanExpressionContext)

Construct an instance with the supplied handlers for the bean.

Parameters:

handlers - the handlers.

defaultHandler - the default handler.

bean - the bean.

beanExpressionResolver - the resolver.

beanExpressionContext - the context.

Since:

2.0.3

Method Detail

getBean

public Object getBean()

Returns:

the bean

invoke

public InvocationResult invoke(Message<?> message,
                               Object... providedArgs)
                        throws Exception

Invoke the method with the given message.

Parameters:

message - the message.

providedArgs - additional arguments.

Returns:

the result of the invocation.

Throws:

Exception - raised if no suitable argument resolver can be found, or the method raised an exception.

getHandlerForPayload

protected InvocableHandlerMethod getHandlerForPayload(Class<? extends Object> payloadClass)

Parameters:

payloadClass - the payload class.

Returns:

the handler.

findHandlerForPayload

protected InvocableHandlerMethod findHandlerForPayload(Class<? extends Object> payloadClass)

matchHandlerMethod

protected boolean matchHandlerMethod(Class<? extends Object> payloadClass,
                                     InvocableHandlerMethod handler)

getMethodNameFor

public String getMethodNameFor(Object payload)

Return a string representation of the method that will be invoked for this payload.

Parameters:

payload - the payload.

Returns:

the method name.

getMethodFor

public Method getMethodFor(Object payload)

Return the method that will be invoked for this payload.

Parameters:

payload - the payload.

Returns:

the method.

Since:

2.0

hasDefaultHandler

public boolean hasDefaultHandler()

getInvocationResultFor

@Nullable
public InvocationResult getInvocationResultFor(Object result,
                                                         Object inboundPayload)