gf/os/gfile/gfile_z_example_cache_test.go

// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package gfile_test

import (
	"fmt"
	"time"

	"github.com/gogf/gf/v2/os/gfile"
)

func ExampleGetContentsWithCache() {
	// init
	var (
		fileName = "gflie_example.txt"
		tempDir  = gfile.Temp("gfile_example_cache")
		tempFile = gfile.Join(tempDir, fileName)
	)

	// write contents
	gfile.PutContents(tempFile, "goframe example content")

	// It reads the file content with cache duration of one minute,
	// which means it reads from cache after then without any IO operations within on minute.
	fmt.Println(gfile.GetContentsWithCache(tempFile, time.Minute))

	// write new contents will clear its cache
	gfile.PutContents(tempFile, "new goframe example content")

	// There's some delay for cache clearing after file content change.
	time.Sleep(time.Second * 1)

	// read contents
	fmt.Println(gfile.GetContentsWithCache(tempFile))

	// May Output:
	// goframe example content
	// new goframe example content
}