org.springframework.integration.aggregator
Interfaces 
CorrelationStrategy
MessageGroupProcessor
ReleaseStrategy
Classes 
AbstractAggregatingMessageGroupProcessor
CorrelatingMessageBarrier
CorrelatingMessageHandler
CorrelationStrategyAdapter
DefaultAggregatingMessageGroupProcessor
HeaderAttributeCorrelationStrategy
MessageCountReleaseStrategy
MessageListMethodAdapter
MessageSequenceComparator
MethodInvokingMessageGroupProcessor
PassThroughMessageGroupProcessor
ReleaseStrategyAdapter
ResequencingMessageGroupProcessor
SequenceNumberComparator
SequenceSizeReleaseStrategy
TimeoutCountSequenceSizeReleaseStrategy