Package org.springframework.aop.interceptor

Class AsyncExecutionInterceptor

  • All Implemented Interfaces:
    Advice, Interceptor, MethodInterceptor, Aware, BeanFactoryAware, Ordered
    Direct Known Subclasses:
    AnnotationAsyncExecutionInterceptor
    public class AsyncExecutionInterceptor
extends AsyncExecutionAspectSupport
implements MethodInterceptor, Ordered
    AOP Alliance MethodInterceptor that processes method invocations asynchronously, using a given AsyncTaskExecutor. Typically used with the Async annotation.

    In terms of target method signatures, any parameter types are supported. However, the return type is constrained to either void or java.util.concurrent.Future. In the latter case, the Future handle returned from the proxy will be an actual asynchronous Future that can be used to track the result of the asynchronous method execution. However, since the target method needs to implement the same signature, it will have to return a temporary Future handle that just passes the return value through (like Spring's AsyncResult or EJB 3.1's javax.ejb.AsyncResult).

    When the return type is java.util.concurrent.Future, any exception thrown during the execution can be accessed and managed by the caller. With void return type however, such exceptions cannot be transmitted back. In that case an AsyncUncaughtExceptionHandler can be registered to process such exceptions.

    As of Spring 3.1.2 the AnnotationAsyncExecutionInterceptor subclass is preferred for use due to its support for executor qualification in conjunction with Spring's @Async annotation.

    Since:
    3.0
    Author:
    Juergen Hoeller, Chris Beams, Stephane Nicoll
    See Also:
    Async, AsyncAnnotationAdvisor, AnnotationAsyncExecutionInterceptor