java如何实现一个方法具有timeout的超时功能

 

参考地址：https://stackoverflow.com/questions/17233038/how-to-implement-synchronous-method-timeouts-in-java

 

原文的问题描述：

写道

I have an synchronous execution path which needs to either complete or timeout within a given time frame. Let's say I have a class with main() method in which I invoke methods A() which in-turn calls B() and that in-turn calls C() of same or different classes.....all synchronous without using an external resource like database , webservice or file system (where each of them could be timed out independently using a TxManager or respective timeout api's). So it's more like a CPU or memory intensive computation. How do I code for it's timeout in Java ?

I have looked at TimerTask but that more of making the flow async and for scheduling tasks. Any other suggestions ?

 

最佳答案：You should use ExecutorService to do that

ExecutorService executor = Executors.newSingleThreadExecutor();
Future<String> future = executor.submit(new Callable() {

    public String call() throws Exception {
        //do operations you want
        return "OK";
    }
});
try {
    System.out.println(future.get(2, TimeUnit.SECONDS)); //timeout is in 2 seconds
} catch (TimeoutException e) {
    System.err.println("Timeout");
}
executor.shutdownNow();