org.mule.runtime.core.routing.correlation

Interface EventCorrelatorCallback

All Known Implementing Classes:

CollectionCorrelatorCallback, ResequenceCorrelatorCallback, ResequenceMessagesCorrelatorCallback

public interface EventCorrelatorCallback

A callback used to allow pluggable behaviour when correlating events

Method Summary

Modifier and Type	Method and Description
Event	aggregateEvents(EventGroup events) This method is invoked if the shouldAggregate method is called and returns true.
EventGroup	createEventGroup(Event event, Object id) Creates the event group with a specific correlation size based on the Mule GroupCorrelation support
boolean	shouldAggregateEvents(EventGroup events) Determines if the event group is ready to be aggregated.

Method Detail

shouldAggregateEvents

boolean shouldAggregateEvents(EventGroup events)

Determines if the event group is ready to be aggregated. if the group is ready to be aggregated (this is entirely up to the application. it could be determined by volume, last modified time or some oher criteria based on the last event received).

Parameters:

events - The current event group received by the correlator

Returns:

true if the group is ready for aggregation

aggregateEvents

Event aggregateEvents(EventGroup events)
               throws RoutingException

This method is invoked if the shouldAggregate method is called and returns true. Once this method returns an aggregated message, the event group is removed from the router.

Parameters:

events - the event group for this request

Returns:

an aggregated message

Throws:

AggregationException - if the aggregation fails. in this scenario the whole event group is removed and passed to the exception handler for this component

RoutingException

createEventGroup

EventGroup createEventGroup(Event event,
                            Object id)

Creates the event group with a specific correlation size based on the Mule GroupCorrelation support

Parameters:

id - The group id

event - the current event

Returns:

a new event group of a fixed size