网站后台界面 园林设计,网站负责人照片,论坛型网站怎么做的,wordpress查询次数如果你想通过 RabbitMQ 的死信队列功能实现消费者拒绝消息投递到死信交换机的行为#xff0c;你可以按照以下步骤操作#xff1a; 创建原始队列#xff0c;并将其绑定到一个交换机上#xff1a; export RABBITMQ_SERVER127.0.0.1 export RABBITMQ_PORT5672 export RAB…如果你想通过 RabbitMQ 的死信队列功能实现消费者拒绝消息投递到死信交换机的行为你可以按照以下步骤操作 创建原始队列并将其绑定到一个交换机上 export RABBITMQ_SERVER127.0.0.1 export RABBITMQ_PORT5672 export RABBITMQ_USERmingcai export RABBITMQ_PASSWORDpasswordrabbitmqadmin list exchanges rabbitmqadmin declare queue namemy_queue durabletrue rabbitmqadmin declare exchange namemy_exchange typedirect rabbitmqadmin declare binding sourcemy_exchange destinationmy_queue routing_keymy_routing_key创建死信交换机和死信队列并将死信队列绑定到死信交换机 rabbitmqadmin declare exchange namemy_dlx typedirect rabbitmqadmin declare queue namemy_dlq durabletrue rabbitmqadmin declare binding sourcemy_dlx destinationmy_dlq routing_keydlx_routing_key设置原始队列的参数包括死信交换机和死信路由键 rabbitmqadmin declare queue namemy_queue durabletrue arguments{x-dead-letter-exchange:my_dlx, x-dead-letter-routing-key:dlx_routing_key}编写消费者代码在消费者代码中拒绝投递消息到死信交换机 //Consumer.ts import * as amqp from amqplib;async function main() {const connection await amqp.connect(amqp://mingcai:password127.0.0.1);const channel await connection.createChannel();const queue my_queue;await channel.consume(queue, async (msg) {if (msg ! null) {try {await new Promise(resolve {setTimeout((){resolve(true)},3000)})// Process the messageconsole.log(Received message:, msg.content.toString());// Simulate rejection of message delivery to dead letter exchangethrow new Error(Failed to process message, rejecting delivery to dead letter exchange);} catch (error) {// Reject the message delivery to dead letter exchangechannel.reject(msg, false);console.error(Error processing message:, error.message);}}});console.log(Waiting for messages...); }main().catch(console.error); 在这个示例中当消费者处理消息时发生错误时它会将消息的投递拒绝到死信交换机。这样这些被拒绝的消息将被重新路由到死信队列 my_dlq 中。 记得根据你的具体需求修改队列、交换机和消费者的配置确保它们符合你的预期行为。 rabbitmqadmin purge queue namemy_dlq #删除队列中的所有消息 //Producer.ts import * as amqp from amqplib;async function sendMsg() {try {const connection await amqp.connect(amqp://mingcai:password127.0.0.1);const channel await connection.createChannel(); // 创建通道const delayQueue my_queue; // 延迟队列名称// 每秒发送一条消息for (let i 0; i 100; i) {await new Promise(resolve {setTimeout(() {resolve(true)}, 1000)})const message Hello RabbitMQ!;channel.sendToQueue(delayQueue, Buffer.from(message));console.log(消息已发送:, message);}} catch (error) {console.error(错误:, error);} }sendMsg()