获取和调试 RocketMQ 的源码

public class Producer {
    public static void main(String[] args) throws MQClientException, InterruptedException {
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        producer.setNamesrvAddr("127.0.0.1:9876");
        producer.start();

        for (int i = 0; i < 1; i++) {
            try {
                Message msg = new Message(
                    "TopicTest" /* Topic */,
                    "TagA" /* Tag */,
                    ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
                );

                SendResult sendResult = producer.send(msg);
                System.out.printf("%s%n", sendResult);
            } catch (Exception e) {
                e.printStackTrace();
                Thread.sleep(1000);
            }
        }

        producer.shutdown();
    }
}

SendResult [sendStatus=SEND_OK, msgId=C0A8010325B46D06D69C70A211400000,
offsetMsgId=C0A8010300002A9F0000000000000000, messageQueue=MessageQueue
[topic=TopicTest, brokerName=broker-a, queueId=0], queueOffset=0]

public class Consumer {
    public static void main(String[] args) throws InterruptedException, MQClientException {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name_4");
        consumer.setNamesrvAddr("127.0.0.1:9876");
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
        consumer.subscribe("TopicTest", "*");

        consumer.registerMessageListener(new MessageListenerConcurrently() {
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) {
                System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        consumer.start();
        System.out.printf("Consumer Started.%n");
    }
}

Consumer Started.
ConsumeMessageThread_1 Receive New Messages: [MessageExt [queueId=0,storeSize=178, queueOffset=0, sysFlag=0, bornTimestamp=1521723269443,bornHost=/192.168.1.3:57034, storeTimestamp=1521723269510,storeHost=/192.168.1.3:10911, msgId=C0A8010300002A9F0000000000000000,commitLogOffset=0
, bodyCRC=613185359, reconsumeTimes=0, preparedTransactionOffset=0,toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=1,CONSUME_START_TIME=1521723841419, UNIQ_KEY=C0A8010325B46D06D69C70A211400000,WAIT=true, TAGS=T
agA}, body=16]]]

public class Producer {
    public static void main(String[] args) throws MQClientException, InterruptedException {
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        producer.setNamesrvAddr("127.0.0.1:9876");
        producer.start();

        for (int i = 0; i < 1; i++) {
            try {
                Message msg = new Message(
                    "TopicTest" /* Topic */,
                    "TagA" /* Tag */,
                    ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
                );

                SendResult sendResult = producer.send(msg);
                System.out.printf("%s%n", sendResult);
            } catch (Exception e) {
                e.printStackTrace();
                Thread.sleep(1000);
            }
        }

        producer.shutdown();
    }
}

SendResult [sendStatus=SEND_OK, msgId=C0A8006606EC18B4AAC24BC584450000,
offsetMsgId=C0A8290100002A9F00000000000000B2, messageQueue=MessageQueue
[topic=TopicTest, brokerName=broker-a, queueId=3], queueOffset=0]

public class Consumer {
    public static void main(String[] args) throws InterruptedException, MQClientException {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name_4");
        consumer.setNamesrvAddr("127.0.0.1:9876");
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
        consumer.subscribe("TopicTest", "*");

        consumer.registerMessageListener(new MessageListenerConcurrently() {
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) {
                System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        consumer.start();
        System.out.printf("Consumer Started.%n");
    }
}

Consumer Started.
ConsumeMessageThread_1 Receive New Messages: [MessageExt [queueId=0,storeSize=178, queueOffset=1, sysFlag=0, bornTimestamp=1529053736201,bornHost=/192.168.41.1:50331, storeTimestamp=1529053736210,storeHost=/192.168.41.1:10911, msgId=C0A8290100002A9F0000000000000164,commitLogOffset=356, bodyCRC=613185359, reconsumeTimes=0,preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0,properties={MIN_O
FFSET=0, MAX_OFFSET=2, CONSUME_START_TIME=1529053736226,UNIQ_KEY=C0A800662C8C18B4AAC24BC70D080000, WAIT=true, TAGS=TagA}, body=16]]]