RabbitMq安裝與測試教程

Installing on Mac

I. 安裝

brew install rabbitmq

## 進入安裝目錄
cd /usr/local/Cellar/rabbitmq/3.7.5

# 啟動
brew services start rabbitmq
# 當前窗口啟動
rabbitmq-server

啟動控制台之前需要先開啟插件

1	./rabbitmq-plugins enable rabbitmq_management

進入控制台: http://localhost:15672/

用戶名和密碼：guest,guest

II. 配置與測試

1. 添加賬號

首先是得啟動mq

## 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

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

開始寫代碼

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;

 //發布消息，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，執行完畢之后，可以到控制台進行查看:

out

可以看到多出了一個Queue，對列名為hello，總共有10條數據

接下來就是消費數據了，執行consumer方法，輸出日志

[*] 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，發現總得數據量為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為false channel.basicConsume(QUEUE_NAME, false, consumer);

其次在消費數據完畢之后，主動ack/nack

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

https://www.cnblogs.com/jasonLiu2018/p/12927512.html

RabbitMQ no access to this vhost

連接的失敗報錯：RabbitMQ Exception (403) Reason: "no access to this vhost"

因為沒有配置該用戶的訪問權限,可以通過
rabbitmqctl add_vhost admin
來添加，並賦予權限：
rabbitmqctl set_permissions -p admin 用戶名 "." "." ".*"

代碼在連接的時候，必須制定對應的vhost，否則是沒有訪問權限：
conn, err := amqp.Dial("amqp://sky:password@ip:5672/admin”)

Mac環境下RabbitMq安裝與測試教程