Threads.java
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package com.lhcredit.common.utils;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 线程相关工具类.
*/
public class Threads {
private static final Logger logger = LoggerFactory.getLogger(Threads.class);
/**
* sleep等待,单位为毫秒
*/
public static void sleep(long milliseconds) {
try {
Thread.sleep(milliseconds);
} catch (InterruptedException e) {
return;
}
}
/**
* 停止线程池
* 先使用shutdown, 停止接收新任务并尝试完成所有已存在任务.
* 如果超时, 则调用shutdownNow, 取消在workQueue中Pending的任务,并中断所有阻塞函数.
* 如果仍人超時，則強制退出.
* 另对在shutdown时线程本身被调用中断做了处理.
*/
public static void shutdownAndAwaitTermination(ExecutorService pool) {
if (pool != null && !pool.isShutdown()) {
pool.shutdown();
try {
if (!pool.awaitTermination(120, TimeUnit.SECONDS)) {
pool.shutdownNow();
if (!pool.awaitTermination(120, TimeUnit.SECONDS)) {
logger.info("Pool did not terminate");
}
}
} catch (InterruptedException ie) {
pool.shutdownNow();
Thread.currentThread().interrupt();
}
}
}
/**
* 打印线程异常信息
*/
public static void printException(Runnable r, Throwable t) {
if (t == null && r instanceof Future<?>) {
try {
Future<?> future = (Future<?>) r;
if (future.isDone()) {
future.get();
}
} catch (CancellationException ce) {
t = ce;
} catch (ExecutionException ee) {
t = ee.getCause();
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
}
}
if (t != null) {
logger.error(t.getMessage(), t);
}
}
}