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Improve RocketMQ integration example (#1757) 

- The demo was unable to run and stop because of missing namesrv configuration, and now fixed.
This commit is contained in:
Peine 2021-02-03 09:46:56 +08:00 committed by GitHub
parent bf83f058c8
commit fe59485fa9
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3 changed files with 20 additions and 7 deletions
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1
sentinel-demo/sentinel-demo-rocketmq/src/main/java/com/alibaba/csp/sentinel/demo/rocketmq/Constants.java
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@ -19,6 +19,7 @@ public final class Constants {
public static final String TEST_GROUP_NAME = "sentinel-group"; public static final String TEST_GROUP_NAME = "sentinel-group";
public static final String TEST_TOPIC_NAME = "SentinelTopicTest"; public static final String TEST_TOPIC_NAME = "SentinelTopicTest";
public static final String TEST_NAMESRV_ADDR = "127.0.0.1:9876";
private Constants() {} private Constants() {}
} }

11
sentinel-demo/sentinel-demo-rocketmq/src/main/java/com/alibaba/csp/sentinel/demo/rocketmq/PullConsumerDemo.java
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@ -17,6 +17,7 @@ package com.alibaba.csp.sentinel.demo.rocketmq;
import java.util.Collections; import java.util.Collections;
import java.util.HashMap; import java.util.HashMap;
import java.util.HashSet;
import java.util.Map; import java.util.Map;
import java.util.Set; import java.util.Set;
import java.util.concurrent.ExecutorService; import java.util.concurrent.ExecutorService;
@ -55,10 +56,16 @@ public class PullConsumerDemo {
initFlowControlRule(); initFlowControlRule();
DefaultMQPullConsumer consumer = new DefaultMQPullConsumer(Constants.TEST_GROUP_NAME); DefaultMQPullConsumer consumer = new DefaultMQPullConsumer(Constants.TEST_GROUP_NAME);
consumer.setNamesrvAddr(Constants.TEST_NAMESRV_ADDR);
consumer.start(); consumer.start();
Set<MessageQueue> mqs = consumer.fetchSubscribeMessageQueues(Constants.TEST_TOPIC_NAME); Set<MessageQueue> mqs = new HashSet<>();
try {
mqs = consumer.fetchSubscribeMessageQueues(Constants.TEST_TOPIC_NAME);
} catch (Exception e) {
e.printStackTrace();
}
for (MessageQueue mq : mqs) { for (MessageQueue mq : mqs) {
System.out.printf("Consuming messages from the queue: %s%n", mq); System.out.printf("Consuming messages from the queue: %s%n", mq);
SINGLE_MQ: SINGLE_MQ:

15
sentinel-demo/sentinel-demo-rocketmq/src/main/java/com/alibaba/csp/sentinel/demo/rocketmq/SyncProducer.java
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@ -24,8 +24,8 @@ public class SyncProducer {
public static void main(String[] args) throws Exception { public static void main(String[] args) throws Exception {
// Instantiate with a producer group name. // Instantiate with a producer group name.
DefaultMQProducer producer = new DefaultMQProducer producer = new DefaultMQProducer(Constants.TEST_GROUP_NAME);
DefaultMQProducer(Constants.TEST_GROUP_NAME); producer.setNamesrvAddr(Constants.TEST_NAMESRV_ADDR);
// Launch the instance. // Launch the instance.
producer.start(); producer.start();
for (int i = 0; i < 1000; i++) { for (int i = 0; i < 1000; i++) {
@ -33,9 +33,14 @@ public class SyncProducer {
Message msg = new Message(Constants.TEST_TOPIC_NAME, "TagA", Message msg = new Message(Constants.TEST_TOPIC_NAME, "TagA",
("Hello RocketMQ From Sentinel " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) ("Hello RocketMQ From Sentinel " + i).getBytes(RemotingHelper.DEFAULT_CHARSET)
); );
// Call send message to deliver message to one of brokers.
SendResult sendResult = producer.send(msg); try {
System.out.printf("%s%n", sendResult); // Call send message to deliver message to one of brokers.
SendResult sendResult = producer.send(msg);
System.out.printf("%s%n", sendResult);
} catch (Exception e) {
e.printStackTrace();
}
} }
// Shut down once the producer instance is not longer in use. // Shut down once the producer instance is not longer in use.
producer.shutdown(); producer.shutdown();