plugeth/vendor/github.com/allegro/bigcache/logger.go

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package bigcache
import (
"log"
"os"
)
// Logger is invoked when `Config.Verbose=true`
type Logger interface {
Printf(format string, v ...interface{})
}
// this is a safeguard, breaking on compile time in case
// `log.Logger` does not adhere to our `Logger` interface.
// see https://golang.org/doc/faq#guarantee_satisfies_interface
var _ Logger = &log.Logger{}
// DefaultLogger returns a `Logger` implementation
// backed by stdlib's log
func DefaultLogger() *log.Logger {
return log.New(os.Stdout, "", log.LstdFlags)
}
func newLogger(custom Logger) Logger {
if custom != nil {
return custom
}
return DefaultLogger()
}