Package org.springframework.integration.aggregator

Class DelegatingMessageGroupProcessor

java.lang.Object
org.springframework.integration.aggregator.DelegatingMessageGroupProcessor
All Implemented Interfaces:
org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanFactoryAware, org.springframework.context.Lifecycle, MessageGroupProcessor, ManageableLifecycle
public class DelegatingMessageGroupProcessor
extends java.lang.Object
implements MessageGroupProcessor, org.springframework.beans.factory.BeanFactoryAware, ManageableLifecycle
The MessageGroupProcessor implementation with delegation to the provided delegate and optional aggregation for headers.

Unlike AbstractAggregatingMessageGroupProcessor this processor checks a result of the delegate call and aggregates headers into the output only if the result is not a Message or AbstractIntegrationMessageBuilder.

This processor is used internally for wrapping provided non-standard MessageGroupProcessor when a aggregate headers Function is provided. For POJO method invoking or SpEL expression evaluation it is recommended to use an AbstractAggregatingMessageGroupProcessor implementations.

Since:
5.2

  • Constructor Summary

    Constructors 
    Constructor Description
    DelegatingMessageGroupProcessor​(MessageGroupProcessor delegate, java.util.function.Function<MessageGroup,​java.util.Map<java.lang.String,​java.lang.Object>> headersFunction)  

  • Method Summary

    Modifier and Type Method Description
    boolean isRunning()  
    java.lang.Object processMessageGroup​(MessageGroup group)
    Process the given MessageGroup.
    void setBeanFactory​(org.springframework.beans.factory.BeanFactory beanFactory)  
    void start()  
    void stop()  

    Methods inherited from class java.lang.Object

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

  • Constructor Details

  • Method Details

    • setBeanFactory

      public void setBeanFactory​(org.springframework.beans.factory.BeanFactory beanFactory) throws org.springframework.beans.BeansException
      Specified by:
      setBeanFactory in interface org.springframework.beans.factory.BeanFactoryAware
      Throws:
      org.springframework.beans.BeansException

    • processMessageGroup

      public java.lang.Object processMessageGroup​(MessageGroup group)
      Description copied from interface: MessageGroupProcessor
      Process the given MessageGroup. Implementations are free to return as few or as many messages based on the invocation as needed. For example an aggregating processor will return only a single message representing the group, while a resequencing processor will return all messages whose preceding sequence has been satisfied.

      If a multiple messages are returned the return value must be a Collection<Message>.

      Specified by:
      processMessageGroup in interface MessageGroupProcessor
      Parameters:
      group - The message group.
      Returns:
      The result of processing the group.

    • start

      public void start()
      Specified by:
      start in interface org.springframework.context.Lifecycle
      Specified by:
      start in interface ManageableLifecycle

    • stop

      public void stop()
      Specified by:
      stop in interface org.springframework.context.Lifecycle
      Specified by:
      stop in interface ManageableLifecycle

    • isRunning

      public boolean isRunning()
      Specified by:
      isRunning in interface org.springframework.context.Lifecycle
      Specified by:
      isRunning in interface ManageableLifecycle