rabbitmq生产者基于事务实现发送确认

【README】业务场景：业务处理伴随消息的发送，业务处理失败（事务回滚）后要求消息不发送。

补充1：ACK与CONFIRM的区别

ACK-消费者消费成功后确认；（消费者确认已收到）

CONFIRM-事务生产者异常事务回滚，不发送到mq服务器代理;（生产者确认发送成功）

补充2：参考了这篇文章，写的非常棒； https://blog.csdn.net/u013256816/article/details/55515234/

【1】交换机，队列声明与绑定

/*** 交换机，队列声明与绑定 */
public class ConfirmDeclarer {/** 确认交换机 */public static final String CONFIRM_EXCHANGE2 = "CONFIRM_EXCHNAGE2";/** 确认队列 */public static final String CONFIRM_QUEUE2 = "CONFIRM_QUEUE2";/** 路由键  */public static final String CONFIRM_ROUTE2 = "CONFIRM_ROUTE2";//	四种Exchange 模式
//    direct ：需要生产者和消费者绑定相同的Exchange和routing key。
//    fanout：广播模式需要生产者消费者绑定相同的Exchange。
//    topic：支持模糊匹配的广播模式以点分隔，*表示一个单词，#表示任意数量（零个或多个）单词。
//    header：根据生产者和消费者的header中信息进行匹配性能较差 ，x-match [all 匹配所有/any 任意一个]。public static void main(String[] args) throws Exception {/* 获取连接*/Connection conn = RBConnectionUtil.getConn();// 创建信道 Channel channel = conn.createChannel(); /* 声明交换机 */channel.exchangeDeclare(CONFIRM_EXCHANGE2, BuiltinExchangeType.FANOUT);/* 声明队列 */channel.queueDeclare(CONFIRM_QUEUE2, true, false, false, null); System.out.println(String.format("声明交换机【%s】，队列【%s】成功", CONFIRM_EXCHANGE2, CONFIRM_QUEUE2));/* 把队列绑定到交换机 */channel.queueBind(CONFIRM_QUEUE2, CONFIRM_EXCHANGE2, CONFIRM_ROUTE2);/* 关闭信道和连接 */channel.close();conn.close(); }
}

【2】生产者，基于事务实现消息确认

/*** 消息确认生产者*/
public class ConfirmProducer {public static void main(String[] args) throws Exception {/* 获取连接*/Connection conn = RBConnectionUtil.getConn();// 创建信道 Channel channel = conn.createChannel();String[] messages = new String[]{"first.-04130828", "second..-04130828", "third...-04130828", "fourth....-04130828", "fiveth.....-04130828", "6th.....-04130828", "7th.....-04130828", "8th.....-04130828", "9th.....-04130828", "10th.....-04130828"};channel.txSelect(); // 开启事务int i=0;for (String msg : messages) {try {send(channel, msg); // 发送消息 System.out.println(msg + " is sent");if (++i > 5) {int temp = 1/0; // 抛出0除异常  } channel.txCommit(); // 提交事务 System.out.println("消息发送完成，事务提交，消息=" + msg); } catch(Exception e) { channel.txRollback(); // 抛出异常， 回滚事务System.out.println("抛出异常，消息发送取消，事务回滚，消息=" + msg);  }}channel.close(); conn.close();}private static void send(Channel channel, String msg) throws Exception { //  发送消息channel.basicPublish(ConfirmDeclarer.CONFIRM_EXCHANGE2, ConfirmDeclarer.CONFIRM_ROUTE2, null, msg.getBytes());}
}

【3】日志

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
first.-04130828 is sent
消息发送完成，事务提交，消息=first.-04130828
second..-04130828 is sent
消息发送完成，事务提交，消息=second..-04130828
third...-04130828 is sent
消息发送完成，事务提交，消息=third...-04130828
fourth....-04130828 is sent
消息发送完成，事务提交，消息=fourth....-04130828
fiveth.....-04130828 is sent
消息发送完成，事务提交，消息=fiveth.....-04130828
6th.....-04130828 is sent
抛出异常，消息发送取消，事务回滚，消息=6th.....-04130828
7th.....-04130828 is sent
抛出异常，消息发送取消，事务回滚，消息=7th.....-04130828
8th.....-04130828 is sent
抛出异常，消息发送取消，事务回滚，消息=8th.....-04130828
9th.....-04130828 is sent
抛出异常，消息发送取消，事务回滚，消息=9th.....-04130828
10th.....-04130828 is sent
抛出异常，消息发送取消，事务回滚，消息=10th.....-04130828

【4】rabbitmq首页查看队列中的消息总数