Openfire：通过Servlet群发消息

public class SafeServlet extends HttpServlet {

    private JID serverAddress;
    private MessageRouter router;
    private UserManager userManager;

    @Override
    public void init() throws ServletException {
        super.init();
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        super.doGet(request, response);

        // 获取服务器地址
        serverAddress = new JID(XMPPServer.getInstance().getServerInfo().getXMPPDomain());
        router = XMPPServer.getInstance().getMessageRouter();
        userManager = UserManager.getInstance();

        System.out.println("Require SafeServlet GET Method");

        // 创建消息类
        final Message message = new Message();
        message.setFrom(serverAddress);
        message.setSubject("Test subject");
        message.setBody("Test body");
        message.setType(Message.Type.chat);

        // 获取所有用户
        Collection<User> users = userManager.getUsers();
        String xmppdomain = "@" + JiveGlobals.getProperty("xmpp.domain");
        // 对所有用户进行遍历，发送消息
        for (User u : users)
        {
            // 创建需要发送消息的备份，只将发送对象进行修改
            final Message newMessage = message.createCopy();
            newMessage.setTo(u.getUsername() + xmppdomain);
            try {
                TimerTask messageTask = new TimerTask() {
                    @Override
                    public void run() {
                        router.route(newMessage);
                    }
                };

                TaskEngine.getInstance().schedule(messageTask, 5000);
            } catch (Exception e) {
                Log.error(e.getMessage(), e);
            }
        }
    }

    @Override
    public void destroy() {
        super.destroy();
        
        serverAddress = null;
        router = null;
        userManager = null;
    }
}