com.lmax.disruptor.AlertException 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;
/**
* Used to alert {@link EventProcessor}s waiting at a {@link SequenceBarrier} of status changes.
*
* It does not fill in a stack trace for performance reasons.
*/
@SuppressWarnings("serial")
public final class AlertException extends Exception
{
/**
* Pre-allocated exception to avoid garbage generation
*/
public static final AlertException INSTANCE = new AlertException();
/**
* Private constructor so only a single instance exists.
*/
private AlertException()
{
}
/**
* Overridden so the stack trace is not filled in for this exception for performance reasons.
*
* @return this instance.
*/
@Override
public Throwable fillInStackTrace()
{
return this;
}
}