search
HomeBackend DevelopmentGolangHow to shut down golang process
How to shut down golang processApr 14, 2023 am 11:16 AM

Golang is a strong runtime programming language that can be used to develop high-availability applications. However, in actual development, we may encounter the problem of process shutdown. In this case, we need to use some tools and techniques in Golang to control the shutdown of the process.

This article will cover primitives, signals and other advanced techniques for process shutdown in Golang. We will explore these topics to help you better understand how to control the shutdown of Golang processes.

Primitives for process shutdown

In Golang, the most basic way to shut down a process is to use a two-way channel or cancel the channel. Bidirectional channel is the type of channel used in Golang for communication between different Goroutines. Cancellation channels are a Golang variant of bidirectional channels that can be used to communicate and cancel tasks between Goroutines.

Here, we will use the cancellation channel to demonstrate how to control the shutdown of the process. Here is an example of using a cancellation channel to control process shutdown:

func worker(cancel chan struct{}) {
  for {
    select {
      //检查是否收到取消指令
      case <p> In this example, we create a <code>worker</code> function to simulate a worker process. The <code>worker</code> function uses an infinite loop to perform work, calling the <code>select</code> statement each time it loops to check whether a cancellation instruction has been received. If received, print a log and return, otherwise execute normal work logic. In the main function, we create a cancellation channel, start a worker subprocess, and wait five seconds to close the cancellation channel to stop the work. </p><p>After the cancellation channel is closed, the <code>worker</code> function will receive a <code>cancel</code> signal, and then it will exit the loop and return. </p><h3 id="Signals-for-process-shutdown">Signals for process shutdown</h3><p>In addition to closing the process by canceling the channel, we can also use process signals to control the shutdown of the Golang process. Signals are an operating system-level communication mechanism used to deliver messages and events within the system. In Linux systems, signals are very common. For example, when an application is executing, if it receives the <code>SIGKILL</code> signal, it will be forced to end. In Golang, we can use <code>os.Signal</code> to define signal types and <code>os.Notify</code> to subscribe to signal events. </p><p>The following is an example of using signals to control process shutdown: </p><pre class="brush:php;toolbar:false">func main() {
  //创建关闭信号
  stop := make(chan os.Signal, 1)
  signal.Notify(stop, os.Interrupt)
  
  //启动工作子进程
  go func() {
    for {
      log.Println("Worker: Doing some work")
      time.Sleep(time.Second * 1)
    }
  }()
  
  //等待收到关闭信号
  <p>In this example, we create a channel called <code>stop</code> to respond to the shutdown signal, and Use <code>os.Notify</code> to subscribe to the <code>os.Interrupt</code> signal. The <code>os.Interrupt</code> signal is usually caused by the <code>Ctrl C</code> key. We also started a worker subprocess to simulate the job and output some messages on the console. </p><p>In the main function, we wait for the <code>stop</code> channel to receive data, that is, to receive the closing signal. When it happens, we print a log message and wait a second to allow the program to exit. </p><h3 id="Graceful-shutdown-of-the-process">Graceful shutdown of the process</h3><p>When we shut down the Golang process, there are some additional measures that can be taken to ensure that the process shuts down gracefully. These include closing other connections, waiting for running tasks to complete, saving data, etc. These measures help prevent data loss, file corruption, and other issues. </p><p>Here is an example that shows taking these extra steps when shutting down a process: </p><pre class="brush:php;toolbar:false">func main() {
  //创建关闭信号
  stop := make(chan os.Signal, 1)
  signal.Notify(stop, os.Interrupt, os.Kill)
  
  //创建TCP服务器
  listener, err := net.Listen("tcp", "localhost:8000")
  if err != nil {
    log.Fatal("Error:", err)
  }
  defer listener.Close()
  
  //启动RPC服务
  srv := rpc.NewServer()
  srv.Register(&MathService{})
  go srv.Accept(listener)
  
  //等待收到关闭信号
  <p>In this example, we create a TCP server, RPC service, and shutdown signal. When we receive a shutdown signal, we shut down the server and wait for the running tasks to complete. Finally, we save the data to disk and wait for the program to exit. </p><h3 id="Summary">Summary</h3><p>In this article, we introduced how to use some tools and techniques in Golang to control the shutdown of the process. We learned how to use cancellation channels and signals to shut down processes. Additionally, we also discussed some techniques for gracefully shutting down processes, such as closing connections, waiting for tasks to complete, and saving data. </p><p>These tips can help us ensure the graceful shutdown of the process and avoid problems such as data loss and file corruption. Whether we are developing web servers, network applications, or other types of applications, process shutdown is very important. </p>

The above is the detailed content of How to shut down golang process. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Go language pack import: What is the difference between underscore and without underscore?Go language pack import: What is the difference between underscore and without underscore?Mar 03, 2025 pm 05:17 PM

This article explains Go's package import mechanisms: named imports (e.g., import "fmt") and blank imports (e.g., import _ "fmt"). Named imports make package contents accessible, while blank imports only execute t

How to implement short-term information transfer between pages in the Beego framework?How to implement short-term information transfer between pages in the Beego framework?Mar 03, 2025 pm 05:22 PM

This article explains Beego's NewFlash() function for inter-page data transfer in web applications. It focuses on using NewFlash() to display temporary messages (success, error, warning) between controllers, leveraging the session mechanism. Limita

How to convert MySQL query result List into a custom structure slice in Go language?How to convert MySQL query result List into a custom structure slice in Go language?Mar 03, 2025 pm 05:18 PM

This article details efficient conversion of MySQL query results into Go struct slices. It emphasizes using database/sql's Scan method for optimal performance, avoiding manual parsing. Best practices for struct field mapping using db tags and robus

How do I write mock objects and stubs for testing in Go?How do I write mock objects and stubs for testing in Go?Mar 10, 2025 pm 05:38 PM

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

How can I define custom type constraints for generics in Go?How can I define custom type constraints for generics in Go?Mar 10, 2025 pm 03:20 PM

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

How to write files in Go language conveniently?How to write files in Go language conveniently?Mar 03, 2025 pm 05:15 PM

This article details efficient file writing in Go, comparing os.WriteFile (suitable for small files) with os.OpenFile and buffered writes (optimal for large files). It emphasizes robust error handling, using defer, and checking for specific errors.

How do you write unit tests in Go?How do you write unit tests in Go?Mar 21, 2025 pm 06:34 PM

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

How can I use tracing tools to understand the execution flow of my Go applications?How can I use tracing tools to understand the execution flow of my Go applications?Mar 10, 2025 pm 05:36 PM

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool