dubbo使用方式如下（简化过的代码）：
// 创建锁与条件变量
private final Lock lock
= new ReentrantLock();
private final Condition done
= lock.newCondition();
// 调用方通过该方法等待结果
Object get(int timeout){
long start = System.nanoTime();
lock.lock();
try {
while (!isDone()) {
done.await(timeout);
long cur=System.nanoTime();
if (isDone() ||
cur-start > timeout){
break;
}
}
} finally {
lock.unlock();
}
if (!isDone()) {
throw new TimeoutException();
}
return returnFromResponse();
}
// RPC结果是否已经返回
boolean isDone() {
return response != null;
}
// RPC结果返回时调用该方法
private void doReceived(Response res) {
lock.lock();
try {
response = res;
if (done != null) {
done.signal();
}
} finally {
lock.unlock();
}
}
原创文章，作者：geekgao，如若转载，请注明出处：https://www.geekgao.cn/archives/2759
微信 
支付宝