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Installation and use of Nacos 1, Introduction Nacos component is a recommended implementation component of registry and configuration center in spring cloud component library. As a registryAs the configuration center 2, Install the Nacos registry Download Nacos server: https://github.com/alibaba/nacos/releasesInstallation: after decompress ...

1. Operating system Deploy on Linux I/O modelData network transmission efficiency 1.1 I/O model level The I/O model is the method by which the operating system executes IO instructions. There are five types Blocking IONon blocking IOIO multiplexingSignal driven IOAsynchronous IO We can simply think that the latter model is more efficient ...

preface Congratulations to all the friends who read this article for successfully unlocking the quick start content of RabbitMQ series 🎁 Through this article, you will quickly learn what middleware is? What is rabbit MQ? How does RabbitMQ work? Finally, Xiaoming will take you through an example to deepen your impression of RabbitMQ ...

I What is an onion model? Look first 🌰 const Koa = require('koa'); const app = new Koa(); const PORT = 3000; // #1 app.use(async (ctx, next)=>{ console.log(1) await next(); //Pause the current program console.log(1) }); // #2 app.use(async (ctx, next) => { console.log(2) await next(); console.log(2) }) app.us ...

introduceThrough a complete example, based on gorilla/mux Add tracing middleware to microservices.What is tracing middleware?The Tracing middleware will record the Tracing data for each API request, which can be viewed by users using tools like Jaeger.We will use rk-boot To start gorilla/mux Microservices.rk-boot Is a framework that can start a ...

Technical research background As the current R & D team is in the start-up stage of the company, there is no mature operation and maintenance system, and the ability to build and maintain the mature MQ commonly seen in the market is insufficient. However, we hope to have a lightweight message system for the members of the R & D team. T ...

preface RabbitMQ is the message queue most used by Internet companies at present. It is commonly used in the following scenarios: Asynchronous, decouplingPeak elimination, Pinggu The following is the main content of this article. This case is for reference only 1, Installation mode Install via yumDownload the installation packag ...

Installation and use // Import express module const express = require('express'); // Register express module const app = express(); //Mount routing app.get('/',(req,res)=>{ res.send(`<h1>home page</h1>`); }) app.get('/user',(req,res)=>{ //req request object get request parameters res.send(req.query); }) app.g ...

1, Basic sample Knowledge foreshadowing The steps of message sending are briefly listed as follows: Create a message producer and specify the producer group name Contact the Broker manager nameserver first. You need to specify the nameserver address Start producer. Create a message object and specify the Topic, Tag and message body send messag ...

Problem point 1. What if the message fails to be sent (due to the network, the broker hangs up)? How does the sender achieve high availability? 2. How to select the message queue, that is, which message queue does the producer send messages to? 3. Why design a broker failure delay mechanism separately? Producer message retry When the produce ...