SPRING_03 Event Mechanism __spring

Spring's event mechanism The main members have these two generals
(1) Applicationevent: Container event, released by ApplicationContext
(2) Applicationlistener: Listener, which can be held by any bean in the container.

On the code.

Event class

Package com.demo.impls;

Import org.springframework.context.ApplicationEvent;

public class EmailEvent extends applicationevent{

    private String address;

    private String text;

    Public emailevent (Object source) {
        super (source);
    }

    Public EmailEvent (Object source, string address, string text) {
        super (source);
        this.address = address;
        This.text = text;

    Public String getaddress () {return address
        ;
    }

    public void setaddress (String address) {
        this.address = address;
    }

    Public String GetText () {return
        text;
    }

    public void SetText (String text) {
        this.text = text;
    }


}

Listening class

Package com.demo.impls;

Import org.springframework.context.ApplicationEvent;
Import Org.springframework.context.ApplicationListener;

The public class Emailnotifier implements applicationlistener{@Override the public
    void Onapplicationevent ( Applicationevent evt) {
        if (evt instanceof emailevent) {
            emailevent emailevent = (emailevent) evt;
            SYSTEM.OUT.PRINTLN ("Email address:" + emailevent.getaddress ());
            SYSTEM.OUT.PRINTLN ("Email text:" + emailevent.gettext ());
        } else{
            System.out.println ("Else event:" + evt);
        }
    }

Beans.xml

<bean class= "Com.demo.impls.EmailNotifier" ></bean>

Test tests

Package com.test;

Import Org.springframework.context.ApplicationContext;
Import Org.springframework.context.support.ClassPathXmlApplicationContext;

Import com.demo.impls.EmailEvent;

public class Test03 {public
    static void Main (string[] args) {
        ApplicationContext ctx = new Classpathxmlapplicatio Ncontext ("Beans.xml");
        EmailEvent evt = new EmailEvent ("WU", "wangjie@163.com", "Hello What");
        Ctx.publishevent (EVT);
    }

Final results
Email address:wangjie@163.com
Email Text:hello What
else EVENT:COM.DEMO.IMPLS.EMAILEVENT[SOURCE=WU]