com.lmax.disruptor.AggregateEventHandler Maven / Gradle / Ivy
/*
* Copyright 2011 LMAX Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.lmax.disruptor;
/**
* An aggregate collection of {@link EventHandler}s that get called in sequence for each event.
*
* @param event implementation storing the data for sharing during exchange or parallel coordination of an event.
*/
public final class AggregateEventHandler
implements EventHandler, LifecycleAware
{
private final EventHandler[] eventHandlers;
/**
* Construct an aggregate collection of {@link EventHandler}s to be called in sequence.
*
* @param eventHandlers to be called in sequence.
*/
@SafeVarargs
public AggregateEventHandler(final EventHandler... eventHandlers)
{
this.eventHandlers = eventHandlers;
}
@Override
public void onEvent(final T event, final long sequence, final boolean endOfBatch)
throws Exception
{
for (final EventHandler eventHandler : eventHandlers)
{
eventHandler.onEvent(event, sequence, endOfBatch);
}
}
@Override
public void onStart()
{
for (final EventHandler eventHandler : eventHandlers)
{
if (eventHandler instanceof LifecycleAware)
{
((LifecycleAware) eventHandler).onStart();
}
}
}
@Override
public void onShutdown()
{
for (final EventHandler eventHandler : eventHandlers)
{
if (eventHandler instanceof LifecycleAware)
{
((LifecycleAware) eventHandler).onShutdown();
}
}
}
}