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------------------------正文开始---------------------------
消费者：
---------------------- 构造初始化：
public RabbitMqReceiver(String host, int port, String username, String password)
{
connFactory = new ConnectionFactory();
connFactory.setHost(host);
connFactory.setPort(port);
connFactory.setUsername(username);
connFactory.setPassword(password);
}
********************************************************************************
---------------------- 构造初始化：
public Channel createChannel() throws IOException {
getConnection();
Channel channel = connection.createChannel();
if (channel != null) {
int prefetchCount = 1;
channel.basicQos(prefetchCount);//最多为当前接收方发送一条消息。如果接收方还未处理完毕消息，还没有回发确认，就不要再给他分配消息了，应该把当前消息分配给其它空闲接收方。
boolean durable = true; //Server端的Queue持久化
channel.queueDeclare("task_queue", durable, false, false, null);
logger.info(mqInfo.getAddress() + ":" + mqInfo.getPort() + " MQ Receiver成功创建Channel");
} else {
logger.info(mqInfo.getAddress() + ":" + mqInfo.getPort() + " MQ Receiver创建Channel失败");
}
return channel;
}
********************************************************************************
---------------------- 取得connection实例：
private void getConnection() throws IOException
{
synchronized (this) {
if (connection == null || !connection.isOpen()) {
connection = connFactory.newConnection();
if (connection != null) {
logger.info(mqInfo.getAddress() + ":" + mqInfo.getPort() + " MQ Receiver成功获取连接");
} else {
logger.info(mqInfo.getAddress() + ":" + mqInfo.getPort() + " MQ Receiver获取连接失败");
}
} else {
logger.info(mqInfo.getAddress() + ":" + mqInfo.getPort() + " MQ Receiver连接已存在，复用此连接");
}
}
}
********************************************************************************
----------------------获取Consumer实例：
public QueueingConsumer createConsumer(Channel channel, String queueName) throws IOException {
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queueName, true, consumer); //自动消息确认打开，默认开启了消息确认（接收方接收到消息后，立即向服务器发回确认）。消息接收方处理完消息后，向服务器发送消息确认，服务器再删除该消息。
return consumer;
}
********************************************************************************
----------------------从从rabbitMQ提取消息并转换为对象：
private String getMessageFromMQ() {
String message = StringUtils.EMPTY;
String source = StringUtils.EMPTY;
try {
message = receiver.nextMessage(checkNotNull(consumer), 1000);
source = message;
} catch (ShutdownSignalException e) {
logger.error("", e);
} catch (ConsumerCancelledException e) {
logger.error("consumer exception", e);
} catch (InterruptedException e) {
logger.error("timeout exception", e);
}
try {
if (StringUtils.isNotBlank(message)) {
message = checkNotNull(StringUtils.substringAfter(message, "yyy:"), "xxx");
message = checkNotNull(StringEscapeUtils.unescapeJava(message), "unescape error");
int size = message.length();
if (size > 1) {
message = checkNotNull(message.substring(0, message.length() - 1), "get json-data error");// 去掉末尾的”
} else {
logger.warn(String.format("数据异常,message=%s", source));
}
}
} catch (Throwable e) {
logger.error(String.format("数据异常,message=%s", source), e);
}
return message;
}
********************************************************************************
----------------------每次读取一条消息：
public String nextMessage(QueueingConsumer consumer, long timeOut) throws ShutdownSignalException, ConsumerCancelledException, InterruptedException {
QueueingConsumer.Delivery delivery;
if (timeOut > 0) {
delivery = consumer.nextDelivery(timeOut);
} else {
delivery = consumer.nextDelivery();
}
if (delivery == null) {
return StringUtils.EMPTY;
}
String message = new String(delivery.getBody());
return message;
}
********************************************************************************
---------------------- 在storm中创建mq实例：
SpoutOutputCollector collector;
RabbitMqReceiver receiver;
Channel channel;
QueueingConsumer consumer;
public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) //初始化调用一次
{
this.collector = collector;
receiver = checkNotNull(new RabbitMqReceiver(conf.get("crash.mq.host").toString(),
Integer.valueOf(conf.get("crash.mq.port").toString()), conf.get("crash.mq.user").toString(),
conf.get("crash.mq.pwd").toString()), "receiver is null");
try {
channel = checkNotNull(receiver.createChannel(), "channel is null");
consumer = checkNotNull(receiver.createConsumer(channel, conf.get("crash.mq.channel").toString()),
"comsumer is null");
} catch (Exception e) {
logger.error("init mq-client error:", e);
}
}
---------------------- 在storm中循环执行获得消息实例：
@Override
public void nextTuple()
{
String message = getMessageFromMQ();
}
生产者：
--------------------------------------------------：
private final static String QUEUE_NAME = "hello2";// 队列名不能重复 之前已有就会失败
public class Producer {
private final static String QUEUE_NAME = "hello2";// 队列名不能重复 之前已有就会失败
public static void main(String[] argv) throws java.io.IOException {
/* 使用工厂类建立Connection和Channel，并且设置参数 */
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.10.111");// MQ的IP
factory.setPort(5672);// MQ端口
factory.setUsername("asdf");// MQ用户名
factory.setPassword("123456");// MQ密码
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
/* 创建消息队列，并且发送消息 */
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
String message = "消息2";
channel.basicPublish("", QUEUE_NAME, MessageProperties.PERSISTENT_TEXT_PLAIN, message.getBytes()); //Message持久化
System.out.println("生产了个'" + message + "'");
/* 关闭连接 */
channel.close();
connection.close();
}
}
