所以我想使用一个Json并将其解析为Object,然后实现RPC RabbitMQ Server,以便我可以通过RabbitMQ将对象发送到Server,然后该Object将继续保存在本地Array和可以通过RPC从服务器返回到客户端的通用唯一ID,该ID会告诉您对象的确切存储位置。
官方网站显示了RabbitMQ中RPC的一些实现,在这里您可以找到其实现https://www.rabbitmq.com/tutorials/tutorial-six-javascript.html,在教程中,他们发送一个数字,服务器将计算斐波纳契数列并将结果返回给客户端。相反,我想发送一个对象,而不是一个数字,并且我想接收该对象的通用唯一id(uuid),并将其存储在程序中的全局数组中,我更改了代码,以便它可以发送一个对象并返回uuid,但没有成功。我会很感谢你们的帮助
//this is my server_rpc.js code :
const amqp = require('amqplib/callback_api');
const uuid = require("uuid/v1");
amqp.connect('here is the url: example: localhost', (err, conn) => {
conn.createChannel( (err, ch) => {
let q = 'rpc_queue';
ch.assertQueue(q, {durable: false});
ch.prefetch(10);
console.log(' [x] Waiting RPC requests');
ch.consume(q, function reply(msg) {
console.log("corralation key is: ", msg.properties.correlationId);
let n = uuid();
console.log(" data received ",JSON.parse(JSON.stringify(msg.content.toString())));
console.log("corralation key is: ", msg.properties.correlationId);
ch.sendToQueue(msg.properties.replyTo, Buffer.from(n.toString()), {correlationId: msg.properties.correlationId});
ch.ack(msg);
});
});
});
// and this is my client_rpc.js code :
const amqp = require('amqplib/callback_api');
const uuid = require("uuid/v1");
const express = require("express");
let data = {
"name" : "hil01",
"region" : "weissach",
"ID" : "1",
"version" : "0.0.1"
}
amqp.connect('url: example localhost ', (err, conn) => {
conn.createChannel( (err, ch) => {
ch.assertQueue('', {exclusive: true}, (err, q) => {
var corr = generateUuid();
var newHil = JSON.stringify(data);
console.log(" [x] Requesting uuid for the registered HIL: ", newHil );
console.log("corralation key is: ", corr);
ch.consume(q.queue, function(msg) {
if(msg.properties.correlationId == corr) {
console.log(" [.] Got %s", msg.content.toString());
setTimeout(() => { conn.close(); process.exit(0) }, 100);
}
}, {noAck: true});
ch.sendToQueue('rpc_queue', Buffer.from(newHil, {correlationId: corr, replyTo: q.queue }));
});
});
});
//method to generate the uuid, later will be replaced with the real
uuid function
var generateUuid = () => Math.random().toString() +
Math.random().toString() + Math.random().toString() ;
当我运行server_rpc时,应打印[x]等待请求,然后在单独的cmd中运行client_rpc.js,然后应发送对象,服务器执行并将uuid返回给我。
>答案 0 :(得分:0)
似乎您需要的是对RPC模式的直接答复:您要发送消息并获得响应。
以下是RabbitMQ上有关直接回复的文档:https://www.rabbitmq.com/direct-reply-to.html
TL; TR
这是一个客户端和服务器的示例,它们可以在框中工作:
https://github.com/Igor-lkm/node-rabbitmq-rpc-direct-reply-to
内部内容
安装RabbitMQ后,您将有2个文件要执行:
server.js
{{1}}
client.js
{{1}}
您将得到一个结果,例如: