xesite/vendor/gopkg.in/segmentio/analytics-go.v3/logger.go

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2018-08-22 03:17:59 +00:00
package analytics
import (
"log"
"os"
)
// Instances of types implementing this interface can be used to define where
// the analytics client logs are written.
type Logger interface {
// Analytics clients call this method to log regular messages about the
// operations they perform.
// Messages logged by this method are usually tagged with an `INFO` log
// level in common logging libraries.
Logf(format string, args ...interface{})
// Analytics clients call this method to log errors they encounter while
// sending events to the backend servers.
// Messages logged by this method are usually tagged with an `ERROR` log
// level in common logging libraries.
Errorf(format string, args ...interface{})
}
// This function instantiate an object that statisfies the analytics.Logger
// interface and send logs to standard logger passed as argument.
func StdLogger(logger *log.Logger) Logger {
return stdLogger{
logger: logger,
}
}
type stdLogger struct {
logger *log.Logger
}
func (l stdLogger) Logf(format string, args ...interface{}) {
l.logger.Printf("INFO: "+format, args...)
}
func (l stdLogger) Errorf(format string, args ...interface{}) {
l.logger.Printf("ERROR: "+format, args...)
}
func newDefaultLogger() Logger {
return StdLogger(log.New(os.Stderr, "segment ", log.LstdFlags))
}