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logger.go
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logger.go
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// Copyright 2017 John Scherff
//
// 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 service
import (
`io`
`path/filepath`
`github.com/jscherff/gox/log`
`github.com/jscherff/cmdbd/utils`
)
// LoggerSvc is a collection of LoggerSvc with a getter method.
type LoggerSvc interface {
SystemLog() log.MLogger
AccessLog() log.MLogger
ErrorLog() log.MLogger
Close()
}
// loggerSvc is a collection of MLogger configurations with overrides.
type loggerSvc struct {
LogDir string
Stdout bool
Stderr bool
Syslog bool
Logger struct {
System *logger
Access *logger
Error *logger
}
}
// System returns the system logger.
func (this *loggerSvc) SystemLog() (log.MLogger) {
return this.Logger.System.MLogger
}
// Access returns the access logger.
func (this *loggerSvc) AccessLog() (log.MLogger) {
return this.Logger.Access.MLogger
}
// Error returns the error logger.
func (this *loggerSvc) ErrorLog() (log.MLogger) {
return this.Logger.Error.MLogger
}
// Close closes the system, access, and error loggerSvc.
func (this *loggerSvc) Close() {
this.Logger.System.Close()
this.Logger.Access.Close()
this.Logger.Error.Close()
}
// logger contains the configuration of a MLogger instance.
type logger struct {
log.MLogger
Tag string
Stdout bool
Stderr bool
Syslog bool
LogFile string
LogFlags []string
}
// NewLoggerSvc creates and initializes a new collection of LoggerSvc.
func NewLoggerSvc(cf string, console bool, syslog io.Writer) (LoggerSvc, error) {
this := &loggerSvc{}
if err := utils.LoadConfig(this, cf); err != nil {
return nil, err
}
init := func(l *logger) {
flags := log.LoggerFlags(l.LogFlags...)
file := filepath.Join(this.LogDir, l.LogFile)
l.MLogger = log.NewMLogger(
l.Tag,
flags,
l.Stdout || this.Stdout || console,
l.Stderr || this.Stderr,
file,
)
if (l.Syslog || this.Syslog) && syslog != nil {
l.AddWriter(syslog)
}
}
init(this.Logger.System)
init(this.Logger.Access)
init(this.Logger.Error)
return this, nil
}