org.fusesource.hawtdispatch

Interface EventAggregator<Event,MergedEvent>

All Known Subinterfaces:

OrderedEventAggregator<Event,MergedEvent>

public interface EventAggregator<Event,MergedEvent>

The EventAggregator interface is used by the CustomDispatchSource objects to handle coalescing data before passing it to the application. Implementations of this class should be stateless to remain thread-safe. You can also use one of several built in implementations:

• EventAggregators.INTEGER_ADD
• EventAggregators.INTEGER_OR
• EventAggregators.LONG_ADD
• EventAggregators.LONG_OR

Method Summary

Modifier and Type	Method and Description
MergedEvent	mergeEvent(MergedEvent previous, Event event) Merge the given event with the previous event values.
MergedEvent	mergeEvents(MergedEvent previous, MergedEvent events) Merge the given events with the previous event values.

Method Detail

mergeEvent

MergedEvent mergeEvent(MergedEvent previous,
                       Event event)

Merge the given event with the previous event values.

Parameters:

previous - may be null

event - the value that should be merged

Returns:

a newly merged result

mergeEvents

MergedEvent mergeEvents(MergedEvent previous,
                        MergedEvent events)

Merge the given events with the previous event values.

Parameters:

previous - the value of previous merges

events - the value of more merges

Returns:

a newly merged result