org.springframework.integration.handler

Class BridgeHandler

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.handler.AbstractMessageHandler

org.springframework.integration.handler.AbstractReplyProducingMessageHandler

org.springframework.integration.handler.BridgeHandler

All Implemented Interfaces:

Aware, BeanClassLoaderAware, BeanFactoryAware, BeanNameAware, InitializingBean, ApplicationContextAware, Ordered, Orderable, MessageProducer, TrackableComponent, NamedComponent, MessageHandler

public class BridgeHandler
extends AbstractReplyProducingMessageHandler

A simple MessageHandler implementation that passes the request Message directly to the output channel without modifying it. The main purpose of this handler is to bridge a PollableChannel to a SubscribableChannel or vice-versa.

The BridgeHandler can be used as a stopper at the end of an assembly line of channels. In this setup the output channel doesn't have to be set, but if the output channel is omitted the REPLY_CHANNEL MUST be set on the message. Otherwise, a MessagingException will be thrown at runtime.

Author:

Mark Fisher, Iwein Fuld

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.integration.handler.AbstractReplyProducingMessageHandler

AbstractReplyProducingMessageHandler.RequestHandler

Field Summary

Fields inherited from class org.springframework.integration.context.IntegrationObjectSupport

logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor and Description
BridgeHandler()

Method Summary

Methods

Modifier and Type	Method and Description
String	getComponentType() Subclasses may implement this method to provide component type information.
protected Object	handleRequestMessage(Message<?> requestMessage) Subclasses must implement this method to handle the request Message.

Methods inherited from class org.springframework.integration.handler.AbstractReplyProducingMessageHandler

doInit, doInvokeAdvisedRequestHandler, getMessagingTemplate, handleMessageInternal, hasAdviceChain, onInit, setAdviceChain, setBeanClassLoader, setChannelResolver, setOutputChannel, setOutputChannelName, setRequiresReply, setSendTimeout, shouldCopyRequestHeaders

Methods inherited from class org.springframework.integration.handler.AbstractMessageHandler

getOrder, handleMessage, setOrder, setShouldTrack

Methods inherited from class org.springframework.integration.context.IntegrationObjectSupport

afterPropertiesSet, getApplicationContextId, getBeanFactory, getComponentName, getConversionService, getIntegrationProperties, getIntegrationProperty, getMessageBuilderFactory, getTaskScheduler, setApplicationContext, setBeanFactory, setBeanName, setComponentName, setConversionService, setMessageBuilderFactory, setTaskScheduler, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.integration.support.context.NamedComponent

getComponentName

Constructor Detail

BridgeHandler

public BridgeHandler()

Method Detail

getComponentType

public String getComponentType()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this method to provide component type information.

Specified by:

getComponentType in interface NamedComponent

Overrides:

getComponentType in class AbstractMessageHandler

handleRequestMessage

protected Object handleRequestMessage(Message<?> requestMessage)

Description copied from class: AbstractReplyProducingMessageHandler

Subclasses must implement this method to handle the request Message. The return value may be a Message, a MessageBuilder, or any plain Object. The base class will handle the final creation of a reply Message from any of those starting points. If the return value is null, the Message flow will end here.

Specified by:

handleRequestMessage in class AbstractReplyProducingMessageHandler

Parameters:

requestMessage - The request message.

Returns:

The result of handling the message, or null.