在下面的代码中,我的主要任务是不等待子任务完成其执行。我是Java Thread的新手。所以我无法修复它。我谷歌,发现没有运气。请帮我解决这个线程问题。 代码:Java多线程问题
class ExecutorServiceManager{
public static ExecutorService getExecutor() {
if (executorService == null) {
try {
lock.lock();
if (executorService == null) {
executorService = Executors.newFixedThreadPool(150);
}
} finally {
lock.unlock();
}
}
if(executorService instanceof ThreadPoolExecutor) {
ThreadPoolExecutor threadPoolExecutor = (ThreadPoolExecutor) executorService;
int corePoolSize = threadPoolExecutor.getCorePoolSize();
int maximumPoolSize = threadPoolExecutor.getMaximumPoolSize();
Logger.info(ExecutorServiceManager.class, "ExecutorInfo: CorePoolSize:%s, MaxPoolSize:%s", corePoolSize, maximumPoolSize);
}
return executorService;
}}
class ServiceImpl{
ExecutorServiceManager executorServiceManager;
private void processConversion(String category, Map<String, String> couchDeltaMap, String processKey, String reqId) {
try {
ProgressVo progressVo = new ProgressVo();
CountDownLatch pgCntxtcountDownLatch = new CountDownLatch(1);
executorServiceManager.getExecutor().submit(new MainTask(category, processKey, pgCntxtcountDownLatch, executorServiceManager, progressVo));
Logger.info(ServiceImpl.class, "ExecutorInfo: CorePoolSize:%s, MaxPoolSize:%s", corePoolSize, maximumPoolSize);
pgCntxtcountDownLatch.await();
} catch(InterruptedException ie) {}
catch(Exception ex) {}
}}
class MainTask implements Runnable{
@Override
public void run() {
executorService = executorServiceManager.getExecutor();
executorService.submit(new SubTask(progressVo, couchDeltaMap, reqId, executorServiceManager));
//I want the below operation to be executed, if and only the subtask completed its execution.
//But the below logger is printing before the subtask completed its execution.
Logger.info(MainTask.class, "It got executed before the subtask completed its processing");
pgCntxtcountDownLatch.countDown();
}}
class SubTask implements Runnable{
@Override
public void run() {
executorService = executorServiceManager.getExecutor();
doSomeProcess;
//It stopped in the middle, and the Main task started executing the remaining operation
}}
双检锁坏了,除非你采取某些步骤,这是不必要的,因为不管怎样都不应该使用双重检查锁定。你有没有采取措施确保不必要的双重检查锁定习惯用法能正常工作? –
如果你是java线程的新手,我会坚持使用基本的线程类。它会迫使你理解机制,然后你可以使用更容易使用的类,如果理解机制 – efekctive