org.apache.rocketmq.example.simple.PopConsumer Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.rocketmq.example.simple;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.apache.rocketmq.common.message.MessageExt;
import org.apache.rocketmq.common.message.MessageRequestMode;
import org.apache.rocketmq.remoting.protocol.route.BrokerData;
import org.apache.rocketmq.tools.admin.DefaultMQAdminExt;
public class PopConsumer {
public static final String TOPIC = "TopicTest";
public static final String CONSUMER_GROUP = "CID_JODIE_1";
public static void main(String[] args) throws Exception {
switchPop();
DefaultMQPushConsumer consumer = new DefaultMQPushConsumer(CONSUMER_GROUP);
consumer.subscribe(TOPIC, "*");
consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
consumer.registerMessageListener(new MessageListenerConcurrently() {
@Override
public ConsumeConcurrentlyStatus consumeMessage(List msgs, ConsumeConcurrentlyContext context) {
System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
}
});
consumer.setClientRebalance(false);
consumer.start();
System.out.printf("Consumer Started.%n");
}
private static void switchPop() throws Exception {
DefaultMQAdminExt mqAdminExt = new DefaultMQAdminExt();
mqAdminExt.start();
List brokerDatas = mqAdminExt.examineTopicRouteInfo(TOPIC).getBrokerDatas();
for (BrokerData brokerData : brokerDatas) {
Set brokerAddrs = new HashSet<>(brokerData.getBrokerAddrs().values());
for (String brokerAddr : brokerAddrs) {
mqAdminExt.setMessageRequestMode(brokerAddr, TOPIC, CONSUMER_GROUP, MessageRequestMode.POP, 8, 3_000);
}
}
}
}