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                ~~~ private final static String QUEUE_NAME = "simple_queue"; /** * 如果消息不太重要,丟失也沒有影響,那么自動ACK會比較方便 * 如果消息非常重要,不容丟失。那么最好在消費完成后手動ACK,否則接收消息后就自動ACK,RabbitMQ就會把消息從隊列中刪除。如果此時消費者宕機,那么消息就丟失了 */ public static void main(String[] args) throws Exception { //獲取連接 Connection connection = ConnectionUtil.getConn(); // 創建通道 final Channel channel = connection.createChannel(); // 聲明隊列 channel.queueDeclare(QUEUE_NAME, false, false, false, null); //設置每個消費同時只能處理一條消息 channel.basicQos(1); // 消費者 DefaultConsumer consumer = new DefaultConsumer(channel){ @Override public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException { // body 消息體 String msg = new String(body); System.out.println("recv " + msg); //channel.basicAck(envelope.getDeliveryTag(), false); 手動ack } }; // 監聽隊列, 第二個參數false:手動ack, true:自動ack channel.basicConsume(QUEUE_NAME, true, consumer); } ~~~
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