rabbitmq mac 安裝

RabbitMq安裝

I. 安裝

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brew install rabbitmq ## 進入安裝目錄 cd /usr/local/Cellar/rabbitmq/3.7.5 # 啓動 brew services start rabbitmq # 當前窗口啓動 rabbitmq-server

啓動控制檯之前需要先開啓插件

1	./rabbitmq-plugins enable rabbitmq_management

進入控制檯: http://localhost:15672/

用戶名和密碼：guest,guest

II. 配置與測試

1. 添加賬號

首先是得啓動mq

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## 添加賬號 ./rabbitmqctl add_user admin admin ## 添加訪問權限 ./rabbitmqctl set_permissions -p "/" admin ".*" ".*" ".*" ## 設置超級權限 ./rabbitmqctl set_user_tags admin administrator

2. 編碼實測

pom引入依賴

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<dependency> <groupId>com.rabbitmq</groupId> <artifactId>amqp-client</artifactId> </dependency>

開始寫代碼

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public class RabbitMqTest { //消息隊列名稱 private final static String QUEUE_NAME = "hello"; @Test public void send() throws java.io.IOException, TimeoutException { //創建連接工程 ConnectionFactory factory = new ConnectionFactory(); factory.setHost("127.0.0.1"); factory.setPort(5672); factory.setUsername("admin"); factory.setPassword("admin"); //創建連接 Connection connection = factory.newConnection(); //創建消息通道 Channel channel = connection.createChannel(); //生成一個消息隊列 channel.queueDeclare(QUEUE_NAME, true, false, false, null); for (int i = 0; i < 10; i++) { String message = "Hello World RabbitMQ count: " + i; //發佈消息，第一個參數表示路由（Exchange名稱），未""則表示使用默認消息路由 channel.basicPublish("", QUEUE_NAME, null, message.getBytes()); System.out.println(" [x] Sent '" + message + "'"); } //關閉消息通道和連接 channel.close(); connection.close(); } @Test public void consumer() throws java.io.IOException, java.lang.InterruptedException, TimeoutException { //創建連接工廠 ConnectionFactory factory = new ConnectionFactory(); factory.setHost("127.0.0.1"); factory.setPort(5672); factory.setUsername("admin"); factory.setPassword("admin"); //創建連接 Connection connection = factory.newConnection(); //創建消息信道 Channel channel = connection.createChannel(); //消息隊列 channel.queueDeclare(QUEUE_NAME, true, false, false, null); System.out.println("[*] Waiting for message. To exist press CTRL+C"); AtomicInteger count = new AtomicInteger(0); //消費者用於獲取消息信道綁定的消息隊列中的信息 Consumer consumer = new DefaultConsumer(channel) { @Override public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException { String message = new String(body, "UTF-8"); try { System.out.println(" [x] Received '" + message); } finally { System.out.println(" [x] Done"); channel.basicAck(envelope.getDeliveryTag(), false); } } }; channel.basicConsume(QUEUE_NAME, false, consumer); Thread.sleep(1000 * 60); } }

需要注意的一點是：

• 生產消息: channel.queueDeclare(QUEUE_NAME, true, false, false, null);
• 消費消息: channel.queueDeclare(QUEUE_NAME, true, false, false, null);
• 生產和消費都聲明channel，要求兩者的配置參數一致，否則無法消費數據

3. 輸出說明

首先執行塞入數據，執行完畢之後，可以到控制檯進行查看:

可以看到多出了一個Queue，對列名爲hello，總共有10條數據

---

接下來就是消費數據了，執行consumer方法，輸出日誌

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[*] Waiting for message. To exist press CTRL+C [x] Received 'Hello World RabbitMQ count: 0 [x] Done [x] Received 'Hello World RabbitMQ count: 1 [x] Done [x] Received 'Hello World RabbitMQ count: 2 [x] Done [x] Received 'Hello World RabbitMQ count: 3 [x] Done [x] Received 'Hello World RabbitMQ count: 4 [x] Done [x] Received 'Hello World RabbitMQ count: 5 [x] Done [x] Received 'Hello World RabbitMQ count: 6 [x] Done [x] Received 'Hello World RabbitMQ count: 7 [x] Done [x] Received 'Hello World RabbitMQ count: 8 [x] Done [x] Received 'Hello World RabbitMQ count: 9 [x] Done

回頭去查看queue，發現總得數據量爲0了

4. ACK問題

對於ack的問題，如果在消費數據的時候，出現異常，而我不希望數據丟失，這個時候就需要考慮手動ack的機制來保證了

首先需要設置手動ack

1 2	// 設置autoAck爲false channel.basicConsume(QUEUE_NAME, false, consumer);

其次在消費數據完畢之後，主動ack/nack

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if (success) { channel.basicAck(envelope.getDeliveryTag(), false); } else { channel.basicNack(envelope.getDeliveryTag(), false, false); }