mirror of https://github.com/tidwall/tile38.git
105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
// Copyright 2012-2018 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package logger logs to the windows event log
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package logger
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import (
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"fmt"
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"os"
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"strings"
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"golang.org/x/sys/windows/svc/eventlog"
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)
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const (
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natsEventSource = "NATS-Server"
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)
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// SysLogger logs to the windows event logger
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type SysLogger struct {
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writer *eventlog.Log
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debug bool
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trace bool
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}
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// NewSysLogger creates a log using the windows event logger
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func NewSysLogger(debug, trace bool) *SysLogger {
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if err := eventlog.InstallAsEventCreate(natsEventSource, eventlog.Info|eventlog.Error|eventlog.Warning); err != nil {
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if !strings.Contains(err.Error(), "registry key already exists") {
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panic(fmt.Sprintf("could not access event log: %v", err))
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}
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}
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w, err := eventlog.Open(natsEventSource)
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if err != nil {
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panic(fmt.Sprintf("could not open event log: %v", err))
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}
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return &SysLogger{
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writer: w,
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debug: debug,
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trace: trace,
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}
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}
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// NewRemoteSysLogger creates a remote event logger
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func NewRemoteSysLogger(fqn string, debug, trace bool) *SysLogger {
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w, err := eventlog.OpenRemote(fqn, natsEventSource)
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if err != nil {
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panic(fmt.Sprintf("could not open event log: %v", err))
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}
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return &SysLogger{
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writer: w,
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debug: debug,
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trace: trace,
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}
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}
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func formatMsg(tag, format string, v ...interface{}) string {
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orig := fmt.Sprintf(format, v...)
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return fmt.Sprintf("pid[%d][%s]: %s", os.Getpid(), tag, orig)
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}
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// Noticef logs a notice statement
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func (l *SysLogger) Noticef(format string, v ...interface{}) {
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l.writer.Info(1, formatMsg("NOTICE", format, v...))
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}
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// Fatalf logs a fatal error
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func (l *SysLogger) Fatalf(format string, v ...interface{}) {
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msg := formatMsg("FATAL", format, v...)
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l.writer.Error(5, msg)
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panic(msg)
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}
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// Errorf logs an error statement
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func (l *SysLogger) Errorf(format string, v ...interface{}) {
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l.writer.Error(2, formatMsg("ERROR", format, v...))
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}
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// Debugf logs a debug statement
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func (l *SysLogger) Debugf(format string, v ...interface{}) {
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if l.debug {
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l.writer.Info(3, formatMsg("DEBUG", format, v...))
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}
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}
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// Tracef logs a trace statement
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func (l *SysLogger) Tracef(format string, v ...interface{}) {
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if l.trace {
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l.writer.Info(4, formatMsg("TRACE", format, v...))
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}
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}
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