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我有两个类可以在 java ee 中进行异步方法调用。我正在关注链接http://satishgopal.wordpress.com/2011/04/24/ejb-3-1-asynchronous-methods来学习如何做。当我调用异步方法时,我得到以下结果。

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

我所期望的不是等待 asyncMethod() 方法调用完成,但是正如您从结果中看到的那样,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;
    }


}
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1 回答 1

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去掉ManagedBeanBusinessBean的注解:它应该是一个Enterprise Java Bean,这要归功于@Stateless注解。

也通过以下方式注入它@EJB

@EJB
private BusinessBean businessBean;

请参阅此链接以获取更多参考。

于 2013-07-15T06:19:55.313 回答