rabbitmq(8)事务
祈雨的笔记
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2018-03-25
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via 祈雨的笔记
1、概述
rabbitmq的事务机制可以保证生产者发送的消息成功传递到broker。如果在事务提交前由于本地或broker的问题发生异常，则可以回滚事务。
2、代码
2.1、生产者
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| private final static String QUEUE_NAME = "hello";
@Test
public void testSend() throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.1.7");
factory.setUsername("root");
factory.setPassword("123456");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, true, false, false, null);
try {
channel.txSelect();
String message = "Hello World!";
channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
System.out.println(" [x] Sent '" + message + "'");
channel.txCommit();
} catch (Exception e) {
channel.txRollback();
e.printStackTrace();
}
channel.close();
connection.close();
}
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2.2、消费者
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| private final static String QUEUE_NAME = "hello";
public static void main(String[] args) throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.1.7");
factory.setUsername("root");
factory.setPassword("123456");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, true, false, false, null);
System.out.println(" [*] Waiting for messages.");
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");
System.out.println(" [x] Received '" + message + "'");
}
};
channel.basicConsume(QUEUE_NAME, true, consumer);
}
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