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I looked through the documentation but couldn't find if there is a way to specify a timeout for async operations spawned when using @Async annotated methods using Spring 3.0.
Is there a way to do that? I think this is pretty essential whenever making triggering an async computation.
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Simply put, annotating a method of a bean with @Async will make it execute in a separate thread. In other words, the caller will not wait for the completion of the called method.
The @EnableAsync annotation switches on Spring's ability to run @Async methods in a background thread pool. This class also customizes the Executor by defining a new bean. Here, the method is named taskExecutor , since this is the specific method name for which Spring searches.
Never use @Async on top of a private method. In runtime, it will not able to create a proxy and, therefore, not work.
Timeouts are not provided by the @Async annotation, since the timeout should be decided by the caller of the function, not the function itself.
I'm assuming you're referring to the timeout on an @Async-annotated method which returns a result. Such methods should return an instance of Future, and the get() method on Future is used to specify the timeout.
e.g.
@Async
public Future<String> doSomething() {
return new AsyncResult<String>("test");
}
and then
Future<String> futureResult = obj.doSomething(); // spring makes this an async call
String result = futureResult.get(1, TimeUnit.SECOND);
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