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/*
 * 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; } }





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