/
logging_impl.go
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/
logging_impl.go
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/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* 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 neo4j
import (
"log"
"os"
)
// LogLevel is the type that default logging implementations use for available
// log levels
type LogLevel int
const (
// ERROR is the level that error messages are written
ERROR LogLevel = 1
// WARNING is the level that warning messages are written
WARNING = 2
// INFO is the level that info messages are written
INFO = 3
// DEBUG is the level that debug messages are written
DEBUG = 4
)
type internalLogger struct {
level LogLevel
errorLogger *log.Logger
warningLogger *log.Logger
infoLogger *log.Logger
debugLogger *log.Logger
}
// NoOpLogger returns a logger that doesn't generate any output at all
func NoOpLogger() Logging {
return &internalLogger{level: 0}
}
// ConsoleLogger returns a simple logger that writes its messages to the console
func ConsoleLogger(level LogLevel) Logging {
return &internalLogger{
level: level,
errorLogger: log.New(os.Stderr, "ERROR : ", log.Ldate|log.Ltime|log.Lmicroseconds),
warningLogger: log.New(os.Stdout, "WARNING: ", log.Ldate|log.Ltime|log.Lmicroseconds),
infoLogger: log.New(os.Stdout, "INFO : ", log.Ldate|log.Ltime|log.Lmicroseconds),
debugLogger: log.New(os.Stdout, "DEBUG : ", log.Ldate|log.Ltime|log.Lmicroseconds),
}
}
func (logger *internalLogger) ErrorEnabled() bool {
return ERROR <= logger.level
}
func (logger *internalLogger) WarningEnabled() bool {
return WARNING <= logger.level
}
func (logger *internalLogger) InfoEnabled() bool {
return INFO <= logger.level
}
func (logger *internalLogger) DebugEnabled() bool {
return DEBUG <= logger.level
}
func (logger *internalLogger) Errorf(message string, args ...interface{}) {
logger.errorLogger.Printf(message, args...)
}
func (logger *internalLogger) Warningf(message string, args ...interface{}) {
logger.warningLogger.Printf(message, args...)
}
func (logger *internalLogger) Infof(message string, args ...interface{}) {
logger.infoLogger.Printf(message, args...)
}
func (logger *internalLogger) Debugf(message string, args ...interface{}) {
logger.debugLogger.Printf(message, args...)
}