/**
* 生成消费者
*
* @throws Exception
*/
private void makeConsumer() throws Exception {
if (null == mqConsumer) {
mqConsumer = new DefaultMQPushConsumer(mqGroupName);
mqConsumer.setNamesrvAddr(mqNameServers);
mqConsumer.setInstanceName(mqInstanceName);
mqConsumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);
mqConsumer.registerMessageListener(mqListener);
mqConsumer.start();
logger.info(
"Consumer-> GroupName:{} InstanceName:{} <{}> is ok.",
mqGroupName,
mqInstanceName,
mqNameServers);
}
}
public static void main(String[] args) {
DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("consumer");
consumer.setNamesrvAddr("10.0.1.187:9876:9876");
try {
// 订阅PushTopic下Tag为push的消息
consumer.subscribe("test", "test1");
// 程序第一次启动从消息队列头取数据
consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
consumer.registerMessageListener(
new MessageListenerConcurrently() {
public ConsumeConcurrentlyStatus consumeMessage(
List<MessageExt> list, ConsumeConcurrentlyContext Context) {
Message msg = list.get(0);
System.out.println(msg.toString());
return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
}
});
consumer.start();
} catch (Exception e) {
e.printStackTrace();
}
}
public void init() throws MQClientException {
nameServer = PropertyFileUtil.get("rocketmq.namesrv.domain");
if (StringUtils.isBlank(nameServer)) {
logger.warn("【MQ init】property rocketmq.namesrv.domain not found");
return;
}
if ("localTest".equals(nameServer)) {
logger.warn("【MQ init】localTest");
return;
}
if (StringUtils.isBlank(System.getProperty("rocketmq.namesrv.domain"))) {
System.setProperty("rocketmq.namesrv.domain", nameServer);
}
topicType = getTopic();
topic = RocketMqUtils.getTopic(topicType);
if (StringUtils.isBlank(group)) {
group = "S_" + topic.getTopic() + "_" + topic.getTags();
}
consumer = new DefaultMQPushConsumer(group);
consumer.setNamesrvAddr(nameServer);
consumer.setMessageModel(getMessageModel());
consumer.setConsumeThreadMin(minConsumeThread);
consumer.setConsumeThreadMax(maxConsumeThread);
// 可以不设置 设置后可以起多个 消费端
try {
consumer.setInstanceName("DEFAULT_CONSUMER-" + InetAddress.getLocalHost().getHostName());
} catch (UnknownHostException e) {
logger.error("getHostName error", e);
}
// 设置订阅的topic 设置订阅过滤表达式
if (StringUtils.isBlank(subExpression)) {
subExpression = topic.getTags();
consumer.subscribe(topic.getTopic(), subExpression);
} else {
consumer.subscribe(topic.getTopic(), subExpression);
}
try {
consumer.registerMessageListener(this);
consumer.start();
} catch (MQClientException e) {
logger.error(
"consumer start error!topic={},subExpression={},group={}",
topic.getTopic(),
subExpression,
group,
e);
}
logger.info(
"consumer start! topic={},subExpression={},group={}",
topic.getTopic(),
subExpression,
group);
}