字面翻译是“两阶段终止”，这个模式用来进行结束操作后，再终止线程。比如我们想停止一个线程，但是让他停止之前必须要做一些清理工作，这时候就需要用到two-phase termination模式。
public class TwoPhaseTerminationTest {
/**
* @param args
*/
public static void main(String[] args) {
System.out.println("main begin");
try {
CountupThread t = new CountupThread();
t.start();
Thread.sleep();
System.out.println("main: shutdownRequest");
t.shutdownRequest();
System.out.println("main: join");
t.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("main end");
}
}
class CountupThread extends Thread {
private long counter = ;
private volatile boolean shutdownReuqest = false;
public void shutdownRequest() {
this.shutdownReuqest = true;
interrupt();
}
public boolean isShutdownRequested() {
return shutdownReuqest;
}
@Override
public void run() {
try {
while (!shutdownReuqest) {
doWork();
}
} catch (InterruptedException e) {
} finally {
doShutdown();
}
}
private void doShutdown() {
System.out.println("doShutdown: count=" + counter);
}
private void doWork() throws InterruptedException {
counter++;
System.out.println("doWork: count=" + counter);
Thread.sleep();
}
}