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package org.frameworkset.util.concurrent;
/**
* Copyright 2008 biaoping.yin
*
* 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.
*/
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
/**
*
Description:
*
* Copyright (c) 2018
* @Date 2018/8/29 21:39
* @author biaoping.yin
* @version 1.0
*/
public class BlockedRejectedExecutionHandler implements RejectedExecutionHandler {
protected Logger logger = LoggerFactory.getLogger(this.getClass());
private AtomicInteger rejectCounts = new AtomicInteger();
private long blockedWaitTimeout;
private int warnMultsRejects = 1000;
private String message;
public BlockedRejectedExecutionHandler(String message, long blockedWaitTimeout){
this(message,blockedWaitTimeout,1000);
}
public BlockedRejectedExecutionHandler(String message, long blockedWaitTimeout,int warnMultsRejects){
this.blockedWaitTimeout = blockedWaitTimeout;
this.message = message;
this.warnMultsRejects = warnMultsRejects;
}
/**
* Always log per 1000 mults rejects.
* @param r
* @param executor
*/
@Override
public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
int counts = rejectCounts.incrementAndGet();
if(logger.isWarnEnabled()) {
int t = counts % warnMultsRejects;
if (t == 0) {
logger.warn(new StringBuilder().append("Task[")
.append(message).append("] blocked ")
.append(counts).append(" times.").toString());
}
}
//
try {
if(blockedWaitTimeout <= 0) {
executor.getQueue().put(r);
}
else {
boolean result = executor.getQueue().offer(r, this.blockedWaitTimeout, TimeUnit.MILLISECONDS);
if(!result){
throw new RejectedExecutionException(new StringBuilder().append("Task[").append(message)
.append("] rejected: wait timeout after ")
.append(blockedWaitTimeout).append(" MILLISECONDS.").toString());
}
}
} catch (InterruptedException e1) {
throw new RejectedExecutionException(e1);
}
}
}