性能优化(案例二)-JMS缓冲短信网关
问题：
移动开通一个短信网关供系统发送短信，后来随着业务增加、以及外系统短信接口接入，导致本系统短信模块处理量急剧增加，每秒发送短信50-80条，每逢访问高峰期，导致短信网关堵塞。
?
其次是短信模块部署在应用系统现网环境中，应用系统与短信模块性能上相互影响，不稳定。
?
方案：
由于短信模块直接与短信网关打交道，而应用系统、外系统想发送短息直接与短信模块打交道
可单独部署一个短信服务域，本系统、外系统直接访问短信服务域公布的接口访问即可。
通过在短信模块与短信网关中间建立一个缓冲池（JMS）缓冲短消息
?
实施：
步骤一、
服务域的部署（省略）
?
步骤二、
配置JMS（省略）
?
步骤三、
改造原先短信发送的代码
JMS连接初始化：
??? private QueueConnection connection;
??? private QueueSession session;
??? private QueueSender sender;
??? public void initialize() throws Exception
??? {
??????? if (log.isInfoEnabled()) {
??????????? log.info("Starting JMS Queue Sender Service...");
??????? }
???????
??????? try
??????? {
??????????? InitialContext jndi = getInitialContext("t3://host:port");
??????????? QueueConnectionFactory factory = (QueueConnectionFactory)jndi.lookup("QueueConnectionFactory");
??????????? connection = factory.createQueueConnection();
??????????? session = connection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
??????????? Queue queue = (Queue)jndi.lookup("SMSQueue");??
??????????? sender = session.createSender(queue);
??????????? connection.start();
??????? }
??????? catch(Exception e)
??????? {
??????????? throw e;
??????? }
??? }
??? //发送短信数据方法
??? public void sendNotification(Serializable message)
??? {
??????? try
??????? {
??????????? ObjectMessage object = session.createObjectMessage();
??????????? object.setObject(message);
??????????? sender.send(object);
??????????? log.info("Message Sender send object:" + object.getObject());
??????? }
??????? catch(JMSException e)
??????? {
??????????? log.error("A problem was encountered when create Object Message", e);
??????????? e.printStackTrace();
??????? }
??? }
?
步骤四、
短信服务域增加消费JMS消息的监听器
??? public void initialize() throws Exception
??? {
??????? if (log.isInfoEnabled()) {
??????????? log.info("Starting JMS Queue Receiver Service...");
??????? }
???????
??????? try
??????? {
??????????? InitialContext jndi = new InitialContext();
??????????? QueueConnectionFactory factory = (QueueConnectionFactory)jndi.lookup("QueueConnectionFactory");
??????????? connection = factory.createQueueConnection();
??????????? session = connection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
??????????? Queue queue = (Queue)jndi.lookup("SMSQueue");??
??????????? sender = session.createSender(queue);
??????????? connection.start();
??????????? QueueReceiver receiver = session.createReceiver(queue);
??????????? receiver.setMessageListener(new MessageListener(){
??????????????? public void onMessage(Message message)
??????????????? {
??????????????????? try
??????????????????? {
??????????????????????? ObjectMessage objectMessage = null;
???????????????????????
??????????????????????? if (!(message instanceof ObjectMessage)) {
??????????????????????????? log.error("Cannot handle message of type (+ objectMessage.getObject().getClass().getName() + "). Notification ignored.");
??????????????????????????? return;
??????????????????????? }
??????????????????????? if (log.isDebugEnabled()) {
??????????????????????????? log.debug(objectMessage.getObject());
??????????????????????? }
??????????????????????? //实际调用短信网关发送短信的方法
??????????????????????? handleNotification(objectMessage.getObject());
??????????????????? } catch (JMSException jmsEx) {
??????????????????????? log.error("Cannot handle cluster Notification", jmsEx);
??????????????????? }
??????????????? }
???????????????
??????????? });
??????? }
??????? catch(Exception e)
??????? {
??????????? throw e;
??????? }
??? }
