com.mq.rocketmq.ordermessage.Consumer.java Source code

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Here is the source code for com.mq.rocketmq.ordermessage.Consumer.java

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/**
 * Copyright (C) 2010-2013 Alibaba Group Holding Limited
 *
 * Licensed 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 com.mq.rocketmq.ordermessage;

import com.alibaba.rocketmq.client.consumer.DefaultMQPushConsumer;
import com.alibaba.rocketmq.client.consumer.listener.ConsumeOrderlyContext;
import com.alibaba.rocketmq.client.consumer.listener.ConsumeOrderlyStatus;
import com.alibaba.rocketmq.client.consumer.listener.MessageListenerOrderly;
import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.common.consumer.ConsumeFromWhere;
import com.alibaba.rocketmq.common.message.MessageExt;
import org.apache.commons.lang.StringUtils;

import java.util.List;
import java.util.concurrent.atomic.AtomicLong;

/**
 * ????Offset??
 */
public class Consumer {

    public static void main(String[] args) throws MQClientException {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name_3");
        consumer.setNamesrvAddr("10.115.101.84:9876");
        /**
         * Consumer?<br>
         * ???
         */
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);

        consumer.subscribe("TopicTest", "TagA || TagC || TagD");

        consumer.registerMessageListener(new MessageListenerOrderly() {
            AtomicLong consumeTimes = new AtomicLong(0);

            public ConsumeOrderlyStatus consumeMessage(List<MessageExt> msgs, ConsumeOrderlyContext context) {
                context.setAutoCommit(false);

                this.consumeTimes.incrementAndGet();
                String msg = String.format("%s,%s,%s,%s,%s", this.consumeTimes.get(),
                        Thread.currentThread().getName(), "Receive New Messages:",
                        new String(msgs.get(0).getBody()), msgs.get(0).getTags());

                //                if ((this.consumeTimes.get() % 2) == 0) {
                //                    System.out.println(String.format("%s,%s","Commit",msg));
                //                    return ConsumeOrderlyStatus.COMMIT;
                //                }
                //                else if ((this.consumeTimes.get() % 3) == 0) {
                //                    return ConsumeOrderlyStatus.ROLLBACK;
                //                }
                //                else if ((this.consumeTimes.get() % 3) == 0) {
                //                    System.out.println(String.format("%s,%s","Commit",msg));
                //                    return ConsumeOrderlyStatus.COMMIT;
                //                }
                //                else if ((this.consumeTimes.get() % 5) == 0) {
                //                    context.setSuspendCurrentQueueTimeMillis(3000);
                //                    return ConsumeOrderlyStatus.SUSPEND_CURRENT_QUEUE_A_MOMENT;
                //                }
                System.out.println(String.format("%s,%s", "SUCCESS", msg));
                return ConsumeOrderlyStatus.SUCCESS;
            }
        });

        consumer.start();

        System.out.println("Consumer Started.");
    }

}