github.com/keysonzzz/kmg@v0.0.0-20151121023212-05317bfd7d39/kmgCache/Deprecated.go (about)

     1  package kmgCache
     2  
     3  import (
     4  	"os"
     5  	"time"
     6  
     7  	"github.com/bronze1man/kmg/encoding/kmgGob"
     8  	"github.com/bronze1man/kmg/kmgFile"
     9  )
    10  
    11  // 这个函数bug太多，以废弃，请使用 MustMd5FileChangeCache
    12  // 根据文件变化,对f这个请求进行缓存
    13  // key表示这件事情的缓存key
    14  // pathList表示需要监控的目录
    15  // 文件列表里面如果有文件不存在,会运行代码
    16  // 已知bug,小于1秒的修改不能被检测到.
    17  // @deprecated
    18  func MustFileChangeCache(key string, pathList []string, f func()) {
    19  	//读取文件修改时间缓存信息
    20  	toChange := false
    21  	cacheInfo := map[string]time.Time{}
    22  	cacheFilePath := getFileChangeCachePath(key)
    23  	err := kmgGob.ReadFile(cacheFilePath, &cacheInfo)
    24  	if err != nil {
    25  		cacheInfo = map[string]time.Time{}
    26  	}
    27  	for _, path := range pathList {
    28  		statList, err := kmgFile.GetAllFileAndDirectoryStat(path)
    29  		if err != nil {
    30  			if os.IsNotExist(err) {
    31  				toChange = true
    32  				//fmt.Printf("[MustFileChangeCache] path:[%s] not exist\n", path)
    33  				break
    34  			}
    35  			panic(err)
    36  		}
    37  		for _, stat := range statList {
    38  			if stat.Fi.IsDir() {
    39  				continue
    40  			}
    41  			cacheTime := cacheInfo[stat.FullPath]
    42  			if cacheTime.IsZero() {
    43  				toChange = true
    44  				//fmt.Printf("[MustFileChangeCache] path:[%s] no save mod time\n", stat.FullPath)
    45  				break
    46  			}
    47  			if stat.Fi.ModTime() != cacheTime {
    48  				toChange = true
    49  				//fmt.Printf("[MustFileChangeCache] path:[%s] mod time not match save[%s] file[%s]\n", stat.FullPath,
    50  				//	cacheTime, stat.Fi.ModTime())
    51  				break
    52  			}
    53  		}
    54  		if toChange {
    55  			break
    56  		}
    57  	}
    58  	if !toChange {
    59  		return
    60  	}
    61  	f()
    62  	cacheInfo = map[string]time.Time{}
    63  	for _, path := range pathList {
    64  		statList, err := kmgFile.GetAllFileAndDirectoryStat(path)
    65  		if err != nil {
    66  			panic(err)
    67  		}
    68  		for _, stat := range statList {
    69  			if stat.Fi.IsDir() {
    70  				continue
    71  			}
    72  			cacheInfo[stat.FullPath] = stat.Fi.ModTime()
    73  		}
    74  	}
    75  	kmgFile.MustMkdirForFile(cacheFilePath)
    76  	kmgGob.MustWriteFile(cacheFilePath, cacheInfo)
    77  	//保存文件缓存信息
    78  	return
    79  }