Table of Contents
What is a circuit breaker?
Golang implements circuit breaker
Install the circuit breaker library
Using the circuit breaker library
Define a fuse
Calling the fuse
Summary
Home Backend Development Golang Golang implements circuit breaker

Golang implements circuit breaker

May 05, 2023 pm 08:39 PM

With the popularity of microservice architecture, the circuit breaker mechanism has become an indispensable part. The circuit breaker mechanism can avoid the impact of some network or service failures on the entire system and ensure the reliability and stability of the system. This article will introduce how to use Golang to implement circuit breaker.

What is a circuit breaker?

In a distributed system, communication between services may face problems such as network fluctuations, hardware failures, and timeouts. If the transmission anomaly caused by the fault is not discovered and handled in time, it will cause part or the entire system to collapse, causing serious consequences. The emergence of the circuit breaker mechanism solves this problem.

Circuit breaking is a mechanism to deal with failures. When a service fails, the circuit breaker mechanism will quickly disconnect the service call and set a time window. Within this time window, any request for the service will be intercepted directly and an error message will be returned, avoiding the impact of an avalanche failure on the called service and allowing the system to continue operating until the service returns to normal.

Golang implements circuit breaker

Golang is an efficient, concise and easy-to-learn language, suitable for the development of distributed systems. The integrated environment of the Go language already contains many circuit breaker libraries, which are very convenient to use.

The following will introduce how to use Golang to implement circuit breaker.

Install the circuit breaker library

In Golang, the circuit breaker mechanism is usually implemented using a circuit breaker. In order to use the circuit breaker mechanism, the circuit breaker library needs to be installed first. More practical libraries include Netflix's Hystrix and go-kit's circuit breaker library.

Here we take the circuit breaker library of go-kit as an example to explain. First you need to install it into your local environment. Execute the following code in the terminal:

go get github.com/go-kit/kit/v2/circuitbreaker
Copy after login

Using the circuit breaker library

After installing the circuit breaker library, you can start using the circuit breaker. The following describes how to use go-kit's circuit breaker library to implement circuit breaker.

Define a fuse

The process of defining a fuse is very simple, just use the following code:

breaker := circuitbreaker.NewCircuitBreaker(circuitbreaker.Config{
  Timeout:      2 * time.Second, // 超时时间
  MaxRequests:  1, // 最大请求数
  ReadyToTrip: func(counts circuitbreaker.Counts) bool {
    return counts.ConsecutiveFailures > 3 // 连续3次失败后打开断路器
  },
})
Copy after login

Among them, Timeout specifies the requested Timeout; MaxRequests restricts the maximum number of requests within a time period; ReadyToTrip function is used to check whether the circuit breaker needs to be opened. In the above code, when a request fails more than 3 times, the ReadyToTrip function will return true, that is, open the fuse.

Calling the fuse

After defining the fuse, you can start calling the service. Assuming that you want to call a service, you can implement it as follows:

func main() {
  breaker := circuitbreaker.NewCircuitBreaker(circuitbreaker.Config{
    Timeout:      2 * time.Second,
    MaxRequests:  1,
    ReadyToTrip: func(counts circuitbreaker.Counts) bool {
      return counts.ConsecutiveFailures > 3
    },
  })
  
  if err := breaker.Call(func() error {
    // 调用远端服务
    return remoteCall()
  }); err != nil {
    // 熔断后的处理
    fmt.Println("断路器已开启:", err)
  }
}
Copy after login

When you actually call the service, encapsulate it in the breaker.Call() function. If an error occurs in the call, the circuit breaker mechanism will be triggered, and fault tolerance can be implemented in the code.

Summary

This article introduces the basic definition and principle of the circuit breaker mechanism, and explains in detail how to use Golang to implement circuit breaker. In the development of distributed systems, the circuit breaker mechanism is a very important function. The introduction of the circuit breaker mechanism can ensure the high availability and stability of the system, and plays a vital role in avoiding system crashes.

The above is the detailed content of Golang implements circuit breaker. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
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

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

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What are the vulnerabilities of Debian OpenSSL What are the vulnerabilities of Debian OpenSSL Apr 02, 2025 am 07:30 AM

OpenSSL, as an open source library widely used in secure communications, provides encryption algorithms, keys and certificate management functions. However, there are some known security vulnerabilities in its historical version, some of which are extremely harmful. This article will focus on common vulnerabilities and response measures for OpenSSL in Debian systems. DebianOpenSSL known vulnerabilities: OpenSSL has experienced several serious vulnerabilities, such as: Heart Bleeding Vulnerability (CVE-2014-0160): This vulnerability affects OpenSSL 1.0.1 to 1.0.1f and 1.0.2 to 1.0.2 beta versions. An attacker can use this vulnerability to unauthorized read sensitive information on the server, including encryption keys, etc.

How do you use the pprof tool to analyze Go performance? How do you use the pprof tool to analyze Go performance? Mar 21, 2025 pm 06:37 PM

The article explains how to use the pprof tool for analyzing Go performance, including enabling profiling, collecting data, and identifying common bottlenecks like CPU and memory issues.Character count: 159

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.

What is the problem with Queue thread in Go's crawler Colly? What is the problem with Queue thread in Go's crawler Colly? Apr 02, 2025 pm 02:09 PM

Queue threading problem in Go crawler Colly explores the problem of using the Colly crawler library in Go language, developers often encounter problems with threads and request queues. �...

What libraries are used for floating point number operations in Go? What libraries are used for floating point number operations in Go? Apr 02, 2025 pm 02:06 PM

The library used for floating-point number operation in Go language introduces how to ensure the accuracy is...

What is the go fmt command and why is it important? What is the go fmt command and why is it important? Mar 20, 2025 pm 04:21 PM

The article discusses the go fmt command in Go programming, which formats code to adhere to official style guidelines. It highlights the importance of go fmt for maintaining code consistency, readability, and reducing style debates. Best practices fo

PostgreSQL monitoring method under Debian PostgreSQL monitoring method under Debian Apr 02, 2025 am 07:27 AM

This article introduces a variety of methods and tools to monitor PostgreSQL databases under the Debian system, helping you to fully grasp database performance monitoring. 1. Use PostgreSQL to build-in monitoring view PostgreSQL itself provides multiple views for monitoring database activities: pg_stat_activity: displays database activities in real time, including connections, queries, transactions and other information. pg_stat_replication: Monitors replication status, especially suitable for stream replication clusters. pg_stat_database: Provides database statistics, such as database size, transaction commit/rollback times and other key indicators. 2. Use log analysis tool pgBadg

Transforming from front-end to back-end development, is it more promising to learn Java or Golang? Transforming from front-end to back-end development, is it more promising to learn Java or Golang? Apr 02, 2025 am 09:12 AM

Backend learning path: The exploration journey from front-end to back-end As a back-end beginner who transforms from front-end development, you already have the foundation of nodejs,...

See all articles