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#Servlet Comet聊天室

基于Comet技术的Java简易聊天室,主要学习Servlet Comet技术的使用。

##构建项目

从git上下载最新的代码

git clone https://git.coding.net/xcr_abcd/chat.git

使用maven install编译它

maven install

在target目录下编译生成chat.war,拷贝到tomcat中运行。

##核心功能

核心代码见com.oraclewdp.chat.comet.ChatCometServlet

		final AsyncContext ac = request.startAsync(request, response);
        ac.setTimeout(600000L);
        ac.addListener(new AsyncListener() {

            @Override
            public void onComplete(AsyncEvent ae) throws IOException {
                ASYNC_CONTEXT_QUEUE.remove(ac);
            }

            @Override
            public void onTimeout(AsyncEvent ae) throws IOException {
                ASYNC_CONTEXT_QUEUE.remove(ac);
            }

            @Override
            public void onError(AsyncEvent ae) throws IOException {
                ASYNC_CONTEXT_QUEUE.remove(ac);
            }

            @Override
            public void onStartAsync(AsyncEvent ae) throws IOException {

            }
        });
        ASYNC_CONTEXT_QUEUE.add(ac);

##jar库引用

commons codec
fastjson
sqlite jdbc

##参考资料

主要代码参考了这篇文章:

http://www.ibm.com/developerworks/cn/web/wa-lo-comet/

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