如何判斷開啟的多個執行緒都執行結束了?
阿新 • • 發佈:2019-01-22
class TaskTest {
private Logger log = LoggerFactory.getLogger(getClass().getSimpleName());
private ExecutorService threadPool = Executors.newScheduledThreadPool(8);
private CompletionService<Integer> completionService = new ExecutorCompletionService<Integer>(threadPool);
private AtomicInteger atomicInteger = new AtomicInteger();
private Random random = new Random();
@org.springframework.scheduling.annotation.Scheduled(cron = "0/3 * * * * ?")
public void test(){
long startTime = System.currentTimeMillis();
int num = atomicInteger.getAndIncrement() ;
log.info("任務開始 {} taskNum = {}", Thread.currentThread() , num);
int length = 10;
for(int i = 0 ; i < length; i++){
TestCallable testCallable = new TestCallable(i);
completionService.submit(testCallable);
}
log.debug("----測試中----");
for (int i = 0 ; i < length; i++){
try {
int resultNum = completionService.take().get();
log.debug("執行緒返回結果:{}", resultNum);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
long costTime = System.currentTimeMillis() - startTime;
log.info("任務結束{} taskNum = {}, costTime = {}", Thread.currentThread(), num, costTime);
}
class TestCallable implements Callable<Integer>{
private int i;
TestCallable(int i){
this.i = i;
}
@Override
public Integer call() {
int randomNumber = (random.nextInt(10)+1);
try {
log.debug("執行緒{}睡眠{}秒,i = {}",Thread.currentThread(),randomNumber, i);
Thread.sleep(randomNumber*1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return i;
}
}
}