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type judgment in context

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Signed-off-by: xiekeyang <xiekeyang@huawei.com>
This commit is contained in:
xiekeyang 2016-03-30 17:35:22 +08:00
parent 0eefe17730
commit e388517d21
1 changed files with 4 additions and 12 deletions
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16
context/util.go
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@ -8,25 +8,17 @@ import (
// since that time. If the key is not found, the value returned will be zero. // since that time. If the key is not found, the value returned will be zero.
// This is helpful when inferring metrics related to context execution times. // This is helpful when inferring metrics related to context execution times.
func Since(ctx Context, key interface{}) time.Duration { func Since(ctx Context, key interface{}) time.Duration {
startedAtI := ctx.Value(key) if startedAt, ok := ctx.Value(key).(time.Time); ok {
if startedAtI != nil { return time.Since(startedAt)
if startedAt, ok := startedAtI.(time.Time); ok {
return time.Since(startedAt)
}
} }
return 0 return 0
} }
// GetStringValue returns a string value from the context. The empty string // GetStringValue returns a string value from the context. The empty string
// will be returned if not found. // will be returned if not found.
func GetStringValue(ctx Context, key interface{}) (value string) { func GetStringValue(ctx Context, key interface{}) (value string) {
stringi := ctx.Value(key) if valuev, ok := ctx.Value(key).(string); ok {
if stringi != nil { value = valuev
if valuev, ok := stringi.(string); ok {
value = valuev
}
} }
return value return value
} }