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This commit is contained in:
eatmoreapple 2022-12-14 00:20:22 +08:00
parent 8c9d36ec16
commit d316f2a533
1 changed files with 3 additions and 0 deletions
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3
stroage.go
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@ -51,6 +51,9 @@ func (j *jsonFileHotReloadStorage) Write(p []byte) (n int, err error) {
return 0, err return 0, err
} }
} }
// 为什么这里要对文件进行Truncate操作呢?
// 这是为了方便每次Dump的时候对文件进行重新写入, 而不是追加
// json序列化写入只会调用一次Write方法, 所以不要把这个方法当成io.Writer的Write方法
if _, err = j.file.Seek(0, io.SeekStart); err != nil { if _, err = j.file.Seek(0, io.SeekStart); err != nil {
return return
} }