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cn.jiangzeyin.pool.ThreadPoolService Maven / Gradle / Ivy
package cn.jiangzeyin.pool;
import cn.jiangzeyin.OtherUtil;
import cn.jiangzeyin.StringUtil;
import cn.jiangzeyin.common.DefaultSystemLog;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.util.Map.Entry;
import java.util.concurrent.*;
import java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy;
import java.util.concurrent.atomic.AtomicInteger;
/**
* 系统线程池管理
*
* @author jiangzeyin
* create 2016-10-24
*/
public final class ThreadPoolService {
private final static ConcurrentHashMap POOL_CACHE_INFO_CONCURRENT_HASH_MAP = new ConcurrentHashMap<>();
private ThreadPoolService() {
}
/**
* 创建一个无限制线程池
*
* @param class1 class
* @return 创建成功的线程对象
* @author jiangzeyin
* 2016-10-24
*/
public synchronized static ExecutorService newCachedThreadPool(Class class1) {
if (class1 == null) throw new NullPointerException();
PoolCacheInfo poolCacheInfo = POOL_CACHE_INFO_CONCURRENT_HASH_MAP.get(class1);
if (poolCacheInfo == null) {
// 创建线程方法
poolCacheInfo = createPool(class1);
POOL_CACHE_INFO_CONCURRENT_HASH_MAP.put(class1, poolCacheInfo);
DefaultSystemLog.LOG().info(class1 + "线程池申请成功:" + poolCacheInfo);
}
return poolCacheInfo.poolExecutor;
}
/**
* 创建一个缓存线程对象
*
* @param tClass 线程池主类
* @return 缓存对象
*/
private static PoolCacheInfo createPool(Class tClass) {
PoolConfig poolConfig = (PoolConfig) tClass.getAnnotation(PoolConfig.class);
BlockingQueue blockingQueue;
SystemThreadFactory systemThreadFactory = new SystemThreadFactory(tClass.getName());
ThreadPoolExecutor_Pool threadPoolExecutor;
ProxyHandler proxyHandler;
if (poolConfig == null) {
proxyHandler = new ProxyHandler(PolicyHandler.Caller);
blockingQueue = new SynchronousQueue<>();
threadPoolExecutor = new ThreadPoolExecutor_Pool(0,
Integer.MAX_VALUE,
60L,
TimeUnit.SECONDS,
blockingQueue,
systemThreadFactory,
proxyHandler);
} else {
proxyHandler = new ProxyHandler(poolConfig.HANDLER());
int corePoolSize = poolConfig.value();
if (corePoolSize == 0)
blockingQueue = new SynchronousQueue<>();
else
blockingQueue = new LinkedBlockingQueue<>();
// 构建对象
threadPoolExecutor = new ThreadPoolExecutor_Pool(corePoolSize,
poolConfig.maximumPoolSize(),
poolConfig.keepAliveTime(),
poolConfig.UNIT(),
blockingQueue,
systemThreadFactory,
proxyHandler);
// 获取线程队列最大值
threadPoolExecutor.setQueueMaxSize(poolConfig.queueMaxSize());
}
return new PoolCacheInfo(threadPoolExecutor, blockingQueue, proxyHandler, systemThreadFactory);
}
/**
* 获取线程池队列数
*
* @param tClass 线程池主类
* @return int
*/
public static int getPoolQueuedTasks(Class tClass) {
PoolCacheInfo poolCacheInfo = POOL_CACHE_INFO_CONCURRENT_HASH_MAP.get(tClass);
if (poolCacheInfo == null)
return 0;
return poolCacheInfo.blockingQueue.size();
}
/**
* 获取线程池取消执行的任务数
*
* @param tclass 线程池主类
* @return int
*/
public static int getPoolRejectedExecutionCount(Class tclass) {
PoolCacheInfo poolCacheInfo = POOL_CACHE_INFO_CONCURRENT_HASH_MAP.get(tclass);
if (poolCacheInfo == null)
return 0;
return poolCacheInfo.handler.getRejectedExecutionCount();
}
/**
* 获取线程池信息
*
* @return 所有线程对象
* @author jiangzeyin
* create 2016-11-29
*/
public static JSONArray getThreadPoolStatusInfo() {
JSONArray jsonArray = new JSONArray();
for (Entry entry : POOL_CACHE_INFO_CONCURRENT_HASH_MAP.entrySet()) {
PoolCacheInfo poolCacheInfo = entry.getValue();
String name = OtherUtil.simplifyClassName(entry.getKey().getName());
JSONObject jsonObject = convertInfo(name, poolCacheInfo);
jsonArray.add(jsonObject);
}
return jsonArray;
}
private static JSONObject convertInfo(String name, PoolCacheInfo poolCacheInfo) {
JSONObject jsonObject = new JSONObject();
jsonObject.put("name", name);
ThreadPoolExecutor threadPoolExecutor = poolCacheInfo.poolExecutor;
jsonObject.put("corePoolSize", threadPoolExecutor.getCorePoolSize()); // 核心数
jsonObject.put("poolSize", threadPoolExecutor.getPoolSize()); // 工作集数
jsonObject.put("activeCount", threadPoolExecutor.getActiveCount()); // 活跃线程数
jsonObject.put("largestPoolSize", threadPoolExecutor.getLargestPoolSize()); // 曾经最大线程数
jsonObject.put("completedTaskCount", threadPoolExecutor.getCompletedTaskCount()); // 已完成数
jsonObject.put("taskCount", threadPoolExecutor.getTaskCount()); // 总任务数
jsonObject.put("queueSize", poolCacheInfo.blockingQueue.size()); // 任务队列数
jsonObject.put("rejectedExecutionCount", poolCacheInfo.handler.getRejectedExecutionCount()); // 拒绝任务数
jsonObject.put("maxThreadNumber", poolCacheInfo.systemThreadFactory.threadNumber.get()); // 最大线程编号
jsonObject.put("maximumPoolSize", threadPoolExecutor.getMaximumPoolSize());// 最大线程数
return jsonObject;
}
/**
* 关闭所有线程池
*
* @author jiangzeyin
* create 2016-10-24
*/
public static void shutdown() {
for (Entry entry : POOL_CACHE_INFO_CONCURRENT_HASH_MAP.entrySet()) {
DefaultSystemLog.LOG().info(String.format("关闭%s使用的线程池", entry.getKey()));
entry.getValue().poolExecutor.shutdown();
String name = OtherUtil.simplifyClassName(entry.getKey().getName());
JSONObject jsonObject = convertInfo(name, entry.getValue());
DefaultSystemLog.LOG().info("关闭完成:" + jsonObject);
}
}
private static class PoolCacheInfo {
private final ThreadPoolExecutor_Pool poolExecutor;
private final BlockingQueue blockingQueue;
private final ProxyHandler handler;
private final SystemThreadFactory systemThreadFactory;
PoolCacheInfo(ThreadPoolExecutor_Pool poolExecutor, BlockingQueue blockingQueue, ProxyHandler handler, SystemThreadFactory systemThreadFactory) {
this.poolExecutor = poolExecutor;
this.blockingQueue = blockingQueue;
this.handler = handler;
this.systemThreadFactory = systemThreadFactory;
}
@Override
public String toString() {
return poolExecutor.toString() +
" MaximumPoolSize:" + poolExecutor.getMaximumPoolSize() +
" CorePoolSize:" + poolExecutor.getCorePoolSize() +
" LargestPoolSize:" + poolExecutor.getLargestPoolSize() +
" blockingQueue:" + blockingQueue.size() +
" RejectedExecutionCount:" + handler.getRejectedExecutionCount();
}
}
private static class ProxyHandler implements RejectedExecutionHandler {
private final AtomicInteger handlerCount = new AtomicInteger(0);
private final RejectedExecutionHandler rejectedExecutionHandler;
ProxyHandler(PolicyHandler policyHandler) {
RejectedExecutionHandler rejectedExecutionHandler1 = null;
switch (policyHandler) {
case Abort:
rejectedExecutionHandler1 = new ThreadPoolExecutor.AbortPolicy();
break;
case Caller:
rejectedExecutionHandler1 = new CallerRunsPolicy();
break;
case Discard:
rejectedExecutionHandler1 = new ThreadPoolExecutor.DiscardPolicy();
break;
case DiscardOldest:
rejectedExecutionHandler1 = new ThreadPoolExecutor.DiscardOldestPolicy();
break;
}
rejectedExecutionHandler = rejectedExecutionHandler1;
}
@Override
public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
handlerCount.getAndIncrement();
rejectedExecutionHandler.rejectedExecution(r, executor);
}
int getRejectedExecutionCount() {
return handlerCount.get();
}
}
/**
* 线程池工厂
*
* @author jiangzeyin
* create 2016-11-21
*/
static class SystemThreadFactory implements ThreadFactory {
private static final AtomicInteger poolNumber = new AtomicInteger(1);
private final ThreadGroup group;
private final AtomicInteger threadNumber = new AtomicInteger(1);
private final String namePrefix;
SystemThreadFactory(String poolName) {
if (StringUtil.isEmpty(poolName))
poolName = "pool";
SecurityManager s = System.getSecurityManager();
group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
namePrefix = poolName + "-" + poolNumber.getAndIncrement() + "-thread-";
}
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
if (t.isDaemon())
t.setDaemon(false);
if (t.getPriority() != Thread.NORM_PRIORITY)
t.setPriority(Thread.NORM_PRIORITY);
return t;
}
}
private static class ThreadPoolExecutor_Pool extends ThreadPoolExecutor {
private int queueMaxSize = 0;
ThreadPoolExecutor_Pool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue workQueue, ThreadFactory threadFactory, RejectedExecutionHandler handler) {
super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory, handler);
}
void setQueueMaxSize(int queueMaxSize) {
this.queueMaxSize = queueMaxSize;
}
@Override
public void execute(Runnable command) {
checkQueueSize();
super.execute(command);
}
@Override
public Future submit(Runnable task) {
checkQueueSize();
return super.submit(task);
}
@Override
public Future submit(Callable task) {
checkQueueSize();
return super.submit(task);
}
@Override
public Future submit(Runnable task, T result) {
checkQueueSize();
return super.submit(task, result);
}
/**
* 判断队列数最大值
*/
private void checkQueueSize() {
if (queueMaxSize > 0) {
int queueSize = getQueue().size();
if (queueSize > queueMaxSize)
throw new RuntimeException("queue size :" + queueSize + " >" + queueMaxSize);
}
}
}
}
