pushlet（QQ提示框）

Pushlet 实现服务端往客服端推送消息

系统页面弹出消息框，类似QQ提示框

1. java代码

package com.test.jbpm.common;

import java.io.Serializable;

import java.util.List;

import com.test.jbpm.web.action.BaseAction;

import nl.justobjects.pushlet.core.Dispatcher;

import nl.justobjects.pushlet.core.Event;

import nl.justobjects.pushlet.core.Session;

import nl.justobjects.pushlet.core.SessionManager;

public class NoticePushlet  extends BaseAction implements Serializable{

    // 指定用户id

    public void myUnicast(String user,String message) {

         //必须注册ID  PL.userid="hao";

        if (SessionManager.getInstance().hasSession(user)) {

            SessionManager.getInstance().getSessions();

            Event event = Event.createDataEvent("/flowctrl/main");

            event.setField("noticeKey", message);//内容不能使用中文

            Dispatcher.getInstance().unicast(event, user);

        } else {

            //Event event = Event.createDataEvent("/jbpm_first/hao");

            //event.setField("noticeKey", "The user:("+user+") not live!");

            //Dispatcher.getInstance().unicast(event, this.getSession().getAttribute("code").toString());

            //sDispatcher.getInstance().broadcast(event);

//            Session[] sessions = SessionManager.getInstance().getSessions();

//            for (Session session : sessions) {

//            }

        }

    }

    public void pushletInterface(List<String> prplflNoticeList) {

        Session[] sessions = SessionManager.getInstance().getSessions();

        if (sessions != null && sessions.length > 0) {

            for (Session session : sessions) {

                String sessionId = session.getId();

                String comcode = sessionId.split("->")[0];

                int listLength = 0;

//                for (PrplflNotice pn : prplflNoticeList) {

//                    if (comcode.equals(pn.getComcode())) {

//                        listLength = listLength + 1;

//                    }

//                }

                if (listLength > 0) {

                    String msg = "��" + comcode + "���� " + listLength + " ��4S���뼰ʱ���������Ϣ";

                    Event event = Event.createDataEvent("/flowctrl/main");

                    event.setField("noticeKey", msg);

                    Dispatcher.getInstance().unicast(event, sessionId);

                }

            }

        }

    }

    public void myBroadcast() {

        Event event = Event.createDataEvent("/flowctrl/main"); �

        event.setField("noticeKey", "Broadcast msg");

        Dispatcher.getInstance().broadcast(event);

    }

}

2.jsp代码

需要引入ajax-pushlet-client.js

<script  type="text/javascript">

    // 消息提醒用js，注册监听

    var usercode = '<%=session.getAttribute("code")%>';

    var timestamp=new Date().getTime();

    PL.userid=usercode;

    //PL.userid=usercode+"->"+timestamp;

    PL.webRoot="${pageContext.request.contextPath}/";

    PL._init();

    PL.joinListen('/flowctrl/main');

    function onData(event) {

          var info=event.get("noticeKey");

          openDia(info);

    }

    function openDia(info) {

        document.getElementById('messageInfo').innerHTML = info +'<BR><BR><a href="javascript:void(0);" onclick="deal()" target="page">点击处理(未处理完毕仍可点击以继续)</a>';

        showDiv();

    }

//消息提示使用

        var divTop,divLeft,divWidth,divHeight,docHeight,docWidth,i = 0;

        function showDiv(){

            try{

                divTop = parseInt(document.getElementById("dialog").style.top,10);

                divLeft = parseInt(document.getElementById("dialog").style.left,10);

                divHeight = parseInt(document.getElementById("dialog").offsetHeight,10);

                divWidth = parseInt(document.getElementById("dialog").offsetWidth,10);

                docWidth = document.body.clientWidth;

                docHeight = document.body.clientHeight;

                document.getElementById("dialog").style.top = parseInt(document.body.scrollTop,10) + docHeight - divHeight;

                document.getElementById("dialog").style.left = parseInt(document.body.scrollLeft,10) + docWidth - divWidth;

                document.getElementById("dialog").style.visibility="visible";

            }

            catch(e){}

        }

        function closeDiv()

        {

            document.getElementById('dialog').style.visibility='hidden';

        }

</script>