/
logger.go
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/
logger.go
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// Copyright 2014-2021 Aerospike, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package logger
import (
"fmt"
"log"
"os"
)
// LogPriority specifies the logging level for the client
type LogPriority int
const (
// DEBUG log level
DEBUG LogPriority = iota - 1
// INFO log level
INFO
// WARNING log level
WARNING
// ERR log level
ERR
// OFF log level
OFF LogPriority = 999
)
type genericLogger interface {
Printf(format string, v ...interface{})
}
type logger struct {
Logger genericLogger
level LogPriority
}
// Logger is the default logger instance
var Logger = newLogger()
func newLogger() *logger {
return &logger{
Logger: log.New(os.Stdout, "", log.LstdFlags),
level: OFF,
}
}
// SetLogger sets the *log.Logger object where log messages should be sent to.
// This method is not goroutine-safe, and is not designed to be accessed
// from multiple goroutines.
func (lgr *logger) SetLogger(l genericLogger) {
lgr.Logger = l
}
// SetLevel sets logging level. Default is ERR.
// This method is not goroutine-safe, and is not designed to be accessed
// from multiple goroutines.
func (lgr *logger) SetLevel(level LogPriority) {
lgr.level = level
}
// LogAtLevel will logs a message at the level requested.
func (lgr *logger) LogAtLevel(level LogPriority, format string, v ...interface{}) {
switch level {
case DEBUG:
lgr.Debug(format, v...)
case INFO:
lgr.Info(format, v...)
case WARNING:
lgr.Warn(format, v...)
case ERR:
lgr.Error(format, v...)
case OFF:
}
}
// Debug logs a message if log level allows to do so.
func (lgr *logger) Debug(format string, v ...interface{}) {
if lgr.level <= DEBUG {
if l, ok := lgr.Logger.(*log.Logger); ok {
l.Output(2, fmt.Sprintf(format, v...))
} else {
lgr.Logger.Printf(format, v...)
}
}
}
// Info logs a message if log level allows to do so.
func (lgr *logger) Info(format string, v ...interface{}) {
if lgr.level <= INFO {
if l, ok := lgr.Logger.(*log.Logger); ok {
l.Output(2, fmt.Sprintf(format, v...))
} else {
lgr.Logger.Printf(format, v...)
}
}
}
// Warn logs a message if log level allows to do so.
func (lgr *logger) Warn(format string, v ...interface{}) {
if lgr.level <= WARNING {
if l, ok := lgr.Logger.(*log.Logger); ok {
l.Output(2, fmt.Sprintf(format, v...))
} else {
lgr.Logger.Printf(format, v...)
}
}
}
// Error logs a message if log level allows to do so.
func (lgr *logger) Error(format string, v ...interface{}) {
if lgr.level <= ERR {
if l, ok := lgr.Logger.(*log.Logger); ok {
l.Output(2, fmt.Sprintf(format, v...))
} else {
lgr.Logger.Printf(format, v...)
}
}
}