Question

我有两个类在java ee中进行asynchronus方法调用。我正在关注http://satishgopal.wordpress.com/2011/04/24/ejb-3-1-asynchronous-methods链接以了解如何操作。当我调用asynrnous方法时，我得到了以下结果。

结果：

INFO: caller method running in thread http-thread-pool-8083(5) date:1373866669346
INFO: start running asyncMethod in thread http-thread-pool-8083(5)

INFO: finished running asyncMethod in thread http-thread-pool-8083(5)
INFO: caller method running in thread http-thread-pool-8083(5) date:1373866672348

我期待的是不要等待asyncMethod（）方法调用完成，但是从结果中可以看出asyncMethod（）方法调用不是由另一个线程处理的。使用Glassfish 3.1.1作为应用程序容器。

BusinessBean类

@ManagedBean
@Stateless
public class BusinessBean {

@Asynchronous
public void asyncMethod() {
    System.out.println("start running asyncMethod in thread "+ Thread.currentThread().getName());

    try {
        Thread.sleep(3000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    System.out.println("finished running asyncMethod in thread "+ Thread.currentThread().getName());
}   

}

LoginBean类

@ManagedBean
@RequestScoped
public class LoginBean implements Serializable {

    private static final long serialVersionUID = 1L;

    @ManagedProperty(value="#{businessBean}")
    BusinessBean businessBean;  


    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


    public void login(){        
        System.out.println("caller method running in thread "+Thread.currentThread().getName()+" date:"+System.currentTimeMillis());
        businessBean.asyncMethod();
        System.out.println("caller method running in thread "+Thread.currentThread().getName()+" date:"+System.currentTimeMillis());
    }

    public BusinessBean getBusinessBean() {
        return businessBean;
    }

    public void setBusinessBean(BusinessBean businessBean) {
        this.businessBean = businessBean;
    }


}

Answer 1

删除BusinessBean的ManagedBean注释：它应该是Enterprise Java Bean，这要归功于@Stateless注释。

也可以通过@EJB：

注入它

@EJB
private BusinessBean businessBean;

有关详细信息，请参阅this link。

异步方法调用

1 个答案: