问个jquery.comet问题

[aku0708]

jquery.comet的后台SERVLET如何实现？
哪位高手指点指点，提供点有用的实现代码也行
官方的例子前台代码是这样的

<script type="text/javascript" src="json2.js"></script>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery.comet.js"></script>
<script type="text/javascript">
function timeCallback(msg) {
alert(msg.data);
$("#counter_output").text(msg.data);
};
function msgCallback(msg) {
$("#echo_output").text(msg.data);
};
function sendMessage() {
$.comet.publish("/test/msg",$("#echo_input").val());
};
$(document).ready(function() {
$.comet.init("/comet/servlet/CometServlet");
$.comet.subscribe("/test/msg", msgCallback);
});
</script>

<div class="container">
<div id="echo_output" class="output" style="height:3ex"></div>
<div class="input">
<div>
Input:
<input id="echo_input" type="text">
<input class="button" type="submit" onclick="javascript:sendMessage();" value="publish"/>
</div>
</div>
</div>

[aku0708]

没人用过吗

[qqzeng-ip]

很少人玩这个

[阿非]

http://code.google.com/p/jquerycomet/
http://code.google.com/p/jquerycomet/source/browse/trunk/chat_demo/?r=10

[yctin]

Server没新资料就不返回


while(true) {
if(data = checkData()) {

break;
}
}

[aku0708]

只写一个while就能把数据推向各个客户端了吗