Home Backend Development Golang golang delete cache

golang delete cache

May 27, 2023 am 11:08 AM

With the continuous development of big data and cloud computing technology, caching technology is becoming more and more important in data processing and storage. In golang, caching is an important application scenario. However, if the cache is not deleted in time, it will lead to resource waste and performance degradation. Therefore, this article will introduce how to use golang to delete cache to improve application performance.

1. "Cache"

Cache refers to the technology of storing data in memory. The use of caching technology can reduce access to disks and databases, increase data reading and writing speed, and thereby improve application performance. Caching generally consists of two parts: cache resources and cache strategies. Cache resources refer to the content to be cached, such as pictures, pages, data, etc.; cache strategies refer to how to store resources in memory, including cache time, cache size, expiration policy, etc.

2. Caching in golang

In golang, caching can be implemented with very little code. The following is a simple golang cache call example:

import (
    "sync"
    "time"
)

type Cache struct {
    sync.RWMutex
    items     map[string]*cacheItem
    defaultTTL time.Duration
}

type cacheItem struct {
    value    interface{}
    created  time.Time
    duration time.Duration
}

func (c *Cache) Set(key string, value interface{}) {
    c.Lock()
    defer c.Unlock()

    item := &cacheItem{
        value:    value,
        created:  time.Now(),
        duration: c.defaultTTL,
    }
    c.items[key] = item
}

func (c *Cache) Get(key string) (interface{}, bool) {
    c.RLock()
    defer c.RUnlock()

    item, found := c.items[key]

    if !found {
        return nil, false
    }

    if time.Since(item.created) > item.duration {
        return nil, false
    }

    return item.value, true
}
Copy after login

In the above code, we use two structures Cache and cacheItem. The Cache structure contains items and defaultTTL attributes. The items attribute is a map type used to store cache data, and defaultTTL is used to set the default expiration time of the cache. The cacheItem structure contains value, created, and duration attributes, which respectively represent the cached value, creation time, and cache time.

Through the Set method, we can store key-value pairs in the cache. In the Get method, we will first query whether the key-value pair exists, and if it does not exist, return null and false; otherwise, we will query whether the key-value pair in the cache has expired, and if it has expired, return null and false. Otherwise, return the value of the key-value pair in the cache and true.

3. Golang delete cache

When the content in our cache becomes no longer needed, we need to clear the cache in time to avoid resource waste and performance degradation. Here are some practical golang methods to delete cache:

  1. Delete cache by cache key name
func (c *Cache) Delete(key string) {
    c.Lock()
    defer c.Unlock()

    delete(c.items, key)
}
Copy after login

You can quickly delete one of the caches through the Delete method in the above code Key-value pairs. This method will use the cache key name to find the cache that needs to be deleted. Before calling this method, a locking operation is required to ensure thread safety.

  1. Regularly delete expired cache

In the above code, we slightly mentioned the cache expiration time in the Get method. The cache expiration time is controlled through the duration attribute in cacheItem. If we want to delete expired caches regularly, we can open a goroutine, regularly check all cache items in the cache, and delete expired cache items:

func (c *Cache) StartCleanup(routineInterval time.Duration) {
    ticker := time.NewTicker(routineInterval)
    go func() {
        for {
            select {
            case <-ticker.C:
                c.cleanup()
            }
        }
    }()
}

func (c *Cache) cleanup() {
    c.Lock()
    defer c.Unlock()

    for k, v := range c.items {
        if time.Since(v.created) > v.duration {
            delete(c.items, k)
        }
    }
}
Copy after login

In the above code, we open a goroutine and pass a Timer ticker to trigger cleanup operations regularly. Regular cleaning operations are implemented through the cleanup method. This method traverses all cache items in the cache and deletes a cache item when it has expired.

It should be noted that in the Delete and cleanup methods, we must lock the items attribute to ensure thread safety.

4. Summary

Through this article, we have learned about the cache in golang and introduced how to use golang to delete the cache to improve application performance and reduce resource waste. In actual applications, we can choose different caching strategies and expiration times based on the actual needs of the project to optimize application performance. At the same time, we also need to pay attention to ensuring the thread safety of the cache and avoiding problems such as memory leaks.

The above is the detailed content of golang delete cache. 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)

Hot Topics

Java Tutorial
1664
14
PHP Tutorial
1268
29
C# Tutorial
1247
24
Golang vs. Python: Performance and Scalability Golang vs. Python: Performance and Scalability Apr 19, 2025 am 12:18 AM

Golang is better than Python in terms of performance and scalability. 1) Golang's compilation-type characteristics and efficient concurrency model make it perform well in high concurrency scenarios. 2) Python, as an interpreted language, executes slowly, but can optimize performance through tools such as Cython.

Golang and C  : Concurrency vs. Raw Speed Golang and C : Concurrency vs. Raw Speed Apr 21, 2025 am 12:16 AM

Golang is better than C in concurrency, while C is better than Golang in raw speed. 1) Golang achieves efficient concurrency through goroutine and channel, which is suitable for handling a large number of concurrent tasks. 2)C Through compiler optimization and standard library, it provides high performance close to hardware, suitable for applications that require extreme optimization.

Golang's Impact: Speed, Efficiency, and Simplicity Golang's Impact: Speed, Efficiency, and Simplicity Apr 14, 2025 am 12:11 AM

Goimpactsdevelopmentpositivelythroughspeed,efficiency,andsimplicity.1)Speed:Gocompilesquicklyandrunsefficiently,idealforlargeprojects.2)Efficiency:Itscomprehensivestandardlibraryreducesexternaldependencies,enhancingdevelopmentefficiency.3)Simplicity:

Golang vs. Python: Key Differences and Similarities Golang vs. Python: Key Differences and Similarities Apr 17, 2025 am 12:15 AM

Golang and Python each have their own advantages: Golang is suitable for high performance and concurrent programming, while Python is suitable for data science and web development. Golang is known for its concurrency model and efficient performance, while Python is known for its concise syntax and rich library ecosystem.

Golang vs. C  : Performance and Speed Comparison Golang vs. C : Performance and Speed Comparison Apr 21, 2025 am 12:13 AM

Golang is suitable for rapid development and concurrent scenarios, and C is suitable for scenarios where extreme performance and low-level control are required. 1) Golang improves performance through garbage collection and concurrency mechanisms, and is suitable for high-concurrency Web service development. 2) C achieves the ultimate performance through manual memory management and compiler optimization, and is suitable for embedded system development.

Golang and C  : The Trade-offs in Performance Golang and C : The Trade-offs in Performance Apr 17, 2025 am 12:18 AM

The performance differences between Golang and C are mainly reflected in memory management, compilation optimization and runtime efficiency. 1) Golang's garbage collection mechanism is convenient but may affect performance, 2) C's manual memory management and compiler optimization are more efficient in recursive computing.

C   and Golang: When Performance is Crucial C and Golang: When Performance is Crucial Apr 13, 2025 am 12:11 AM

C is more suitable for scenarios where direct control of hardware resources and high performance optimization is required, while Golang is more suitable for scenarios where rapid development and high concurrency processing are required. 1.C's advantage lies in its close to hardware characteristics and high optimization capabilities, which are suitable for high-performance needs such as game development. 2.Golang's advantage lies in its concise syntax and natural concurrency support, which is suitable for high concurrency service development.

The Performance Race: Golang vs. C The Performance Race: Golang vs. C Apr 16, 2025 am 12:07 AM

Golang and C each have their own advantages in performance competitions: 1) Golang is suitable for high concurrency and rapid development, and 2) C provides higher performance and fine-grained control. The selection should be based on project requirements and team technology stack.

See all articles