我有一个程序,其中许多线程将他们的请求发布到PriorityQueue
。 后来,他们等待ConcurrentSkipListMap
的回复。有一个线索发布ConcurrentSkipListMap
的答案。Java - 是否可以同步ConcurrentSkipListMap上的线程?
的下面几行代码说明这一点:
在程序初始化
PriorityQueue<Request> requests = new PriorityQueue<Request>();
ConcurrentSkipListMap<Long, Reponse> responsesReceived = new ConcurrentSkipListMap<Long, Reponse>();
在调用程序线程
// Send request ...
Request r = ... // Elaborate the request
requests.add(r);
// ... then wait for an answer
Long id = r.getId();
while (responsesReceived.containsKey(id) == false) {
synchronized (responsesReceived) {
responsesReceived.wait();
}
}
Answer a = responsesReceived.take(id);
// Do other things ...
在响应处理线程
// Wait for a remote answer
Answer answer = ...;
// Once received publish it in ConcurrentSkipListMap
responsesReceived.put(answer.getRequestId(), answer);
synchronized (responsesReceived) {
responsesReceived.notify();
}
// Go back and wait for a new answer...
问题
- 它是安全的同步上
ConcurrentSkipListMap
呼叫者线程和响应处理线程? - 我是否应该使用Lock进行同步?
- 我应该使用锁的
HashMap
(HashMap<Long,Object>
)吗?
我用的java.util.concurrent API相当新的,我有些怀疑......
+1因为使用ExecutorService很可能是更好的解决方案。 – 2013-03-28 10:13:19