java - 如何在@Stateless bean中设置@WebMethod的超时值？

Question

我试图弄清楚是否可以在 @Stateless bean 中设置 Web 方法的超时值。或者即使有可能。我搜索了很多，但没有发现与这个问题相关的内容。

示例:

@WebService
@Stateless
public class Test {

    @WebMethod
    @WebResult(name = "hello")
    public String sayHello(){
        return "Hello world";
    }
}

提前非常感谢您的回答。

Answer 1

经过一番搜索和学习后，我通过执行以下操作解决了这个问题:我创建了一个包含 @Asynchronous 方法的无状态 Bean:

@Asynchronous
public Future<String> sayHelloAsync() 
{
     //do something time consuming ...
     return new AsyncResult<String>("Hello world");
}

然后在第二个 bean 中将其方法公开为 Web 服务，我执行了以下操作:

@WebService
@Stateless
public class Test {

     @EJB
     FirstBean myFirstBean;//first bean containing the Async method.

    /**
     * Can be used in futher methods to follow
     * the running web service method
     */
    private Future<String> myAsyncResult;

    @WebMethod
    @WebResult(name = "hello")
    public String sayHello(@WebParam(name = "timeout_in_seconds") long timeout)
    {
        myAsyncResult = myFirstBean.sayHelloAsync();
        String myResult = "Service is still running";
        if(timeout>0)
        {
            try {
                myResult= myAsyncResult.get(timeout, TimeUnit.SECONDS);
            } catch (InterruptedException e) {
                myResult="InterruptedException occured";
            } catch (ExecutionException e) {
                myResult="ExecutionException occured";
            } catch (TimeoutException e) {
                myResult="The timeout value "+timeout+" was reached."+ 
                                 " The Service is still running.";
            }
        }
        return myResult;
    }
}

如果设置了超时，那么客户端将等待该时间，直到达到该时间。就我而言，该过程仍然需要运行。我希望它能帮助其他人。