github.com/instana/go-sensor@v1.62.2-0.20240520081010-4919868049e1/log.go (about) 1 // (c) Copyright IBM Corp. 2021 2 // (c) Copyright Instana Inc. 2016 3 4 package instana 5 6 import ( 7 "github.com/instana/go-sensor/logger" 8 ) 9 10 // Valid log levels 11 const ( 12 Error = 0 13 Warn = 1 14 Info = 2 15 Debug = 3 16 ) 17 18 // LeveledLogger is an interface of a generic logger that support different message levels. 19 // By default instana.Sensor uses logger.Logger with log.Logger as an output, however this 20 // interface is also compatible with such popular loggers as github.com/sirupsen/logrus.Logger 21 // and go.uber.org/zap.SugaredLogger 22 type LeveledLogger interface { 23 Debug(v ...interface{}) 24 Info(v ...interface{}) 25 Warn(v ...interface{}) 26 Error(v ...interface{}) 27 } 28 29 var defaultLogger LeveledLogger = logger.New(nil) 30 31 // SetLogger configures the default logger to be used by Instana go-sensor. Note that changing the logger 32 // will not affect already initialized instana.Sensor instances. To make them use the new logger please call 33 // (instana.TracerLogger).SetLogger() explicitly. 34 func SetLogger(l LeveledLogger) { 35 defaultLogger = l 36 37 // if the sensor has already been initialized, we need to update its logger too 38 if sensor != nil { 39 sensor.setLogger(l) 40 } 41 } 42 43 // setLogLevel translates legacy Instana log levels into logger.Logger levels. 44 // Any level that is greater than instana.Debug is interpreted as logger.DebugLevel. 45 func setLogLevel(l *logger.Logger, level int) { 46 switch level { 47 case Error: 48 l.SetLevel(logger.ErrorLevel) 49 case Warn: 50 l.SetLevel(logger.WarnLevel) 51 case Info: 52 l.SetLevel(logger.InfoLevel) 53 default: 54 l.SetLevel(logger.DebugLevel) 55 } 56 }