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https://github.com/muesli/cache2go

Concurrency-safe Go caching library with expiration capabilities and access counters
https://github.com/muesli/cache2go

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Concurrency-safe Go caching library with expiration capabilities and access counters

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# cache2go

[![Latest Release](https://img.shields.io/github/release/muesli/cache2go.svg)](https://github.com/muesli/cache2go/releases)
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[![Go ReportCard](https://goreportcard.com/badge/muesli/cache2go)](https://goreportcard.com/report/muesli/cache2go)
[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/muesli/cache2go)

Concurrency-safe golang caching library with expiration capabilities.

## Installation

Make sure you have a working Go environment (Go 1.2 or higher is required).
See the [install instructions](https://golang.org/doc/install.html).

To install cache2go, simply run:

go get github.com/muesli/cache2go

To compile it from source:

cd $GOPATH/src/github.com/muesli/cache2go
go get -u -v
go build && go test -v

## Example
```go
package main

import (
"github.com/muesli/cache2go"
"fmt"
"time"
)

// Keys & values in cache2go can be of arbitrary types, e.g. a struct.
type myStruct struct {
text string
moreData []byte
}

func main() {
// Accessing a new cache table for the first time will create it.
cache := cache2go.Cache("myCache")

// We will put a new item in the cache. It will expire after
// not being accessed via Value(key) for more than 5 seconds.
val := myStruct{"This is a test!", []byte{}}
cache.Add("someKey", 5*time.Second, &val)

// Let's retrieve the item from the cache.
res, err := cache.Value("someKey")
if err == nil {
fmt.Println("Found value in cache:", res.Data().(*myStruct).text)
} else {
fmt.Println("Error retrieving value from cache:", err)
}

// Wait for the item to expire in cache.
time.Sleep(6 * time.Second)
res, err = cache.Value("someKey")
if err != nil {
fmt.Println("Item is not cached (anymore).")
}

// Add another item that never expires.
cache.Add("someKey", 0, &val)

// cache2go supports a few handy callbacks and loading mechanisms.
cache.SetAboutToDeleteItemCallback(func(e *cache2go.CacheItem) {
fmt.Println("Deleting:", e.Key(), e.Data().(*myStruct).text, e.CreatedOn())
})

// Remove the item from the cache.
cache.Delete("someKey")

// And wipe the entire cache table.
cache.Flush()
}
```

To run this example, go to examples/mycachedapp/ and run:

go run mycachedapp.go

You can find a [few more examples here](https://github.com/muesli/cache2go/tree/master/examples).
Also see our test-cases in cache_test.go for further working examples.