The aggregator
The aggregator is for showcasing the aggregator usage. An aggregator is plugged on the output channel of the filter, that is, fetchedFeedChannelForAggregatior. We will use all the three components of aggregator: correlation, completion, and aggregator. Let's declare the beans:
<bean id="soFeedCorrelationStrategyBean" class="com.cpandey.siexample.aggregator.CorrelationStrategy"/> <bean id="sofeedCompletionStrategyBean" class="com.cpandey.siexample.aggregator.CompletionStrategy"/> <bean id="aggregatorSoFeedBean" class="com.cpandey.siexample.aggregator.SoFeedAggregator"/>
Once we have defined the three vital components of an aggregator, let's define the component, which will aggregate feeds in a group of five and then release only on the next channel:
<int:aggregator input-channel="fetchedFeedChannelForAggregatior"
output-channel="aggregatedFeedChannel" ref="aggregatorSoFeedBean"
method="aggregateAndPublish" release-strategy="sofeedCompletionStrategyBean...