syslog_windows.go

// Copyright 2012-2024 The NATS Authors
// 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 logs to the windows event log
package logger

import (
"fmt"
"os"
"strings"

"golang.org/x/sys/windows/svc/eventlog"
)

varnatsEventSource="NATS-Server"

// SetSyslogName sets the name to use for the system log event source
funcSetSyslogName(namestring) {
natsEventSource=name
}

// SysLogger logs to the windows event logger
typeSysLoggerstruct {
writer*eventlog.Log
debugbool
tracebool
}

// NewSysLogger creates a log using the windows event logger
funcNewSysLogger(debug, tracebool) *SysLogger {
iferr:=eventlog.InstallAsEventCreate(natsEventSource, eventlog.Info|eventlog.Error|eventlog.Warning); err!=nil {
if!strings.Contains(err.Error(), "registry key already exists") {
panic(fmt.Sprintf("could not access event log: %v", err))
 }
 }

w, err:=eventlog.Open(natsEventSource)
iferr!=nil {
panic(fmt.Sprintf("could not open event log: %v", err))
 }

return&SysLogger{
writer: w,
debug: debug,
trace: trace,
 }
}

// NewRemoteSysLogger creates a remote event logger
funcNewRemoteSysLogger(fqnstring, debug, tracebool) *SysLogger {
w, err:=eventlog.OpenRemote(fqn, natsEventSource)
iferr!=nil {
panic(fmt.Sprintf("could not open event log: %v", err))
 }

return&SysLogger{
writer: w,
debug: debug,
trace: trace,
 }
}

funcformatMsg(tag, formatstring, v...any) string {
orig:=fmt.Sprintf(format, v...)
returnfmt.Sprintf("pid[%d][%s]: %s", os.Getpid(), tag, orig)
}

// Noticef logs a notice statement
func (l*SysLogger) Noticef(formatstring, v...any) {
l.writer.Info(1, formatMsg("NOTICE", format, v...))
}

// Warnf logs a warning statement
func (l*SysLogger) Warnf(formatstring, v...any) {
l.writer.Info(1, formatMsg("WARN", format, v...))
}

// Fatalf logs a fatal error
func (l*SysLogger) Fatalf(formatstring, v...any) {
msg:=formatMsg("FATAL", format, v...)
l.writer.Error(5, msg)
panic(msg)
}

// Errorf logs an error statement
func (l*SysLogger) Errorf(formatstring, v...any) {
l.writer.Error(2, formatMsg("ERROR", format, v...))
}

// Debugf logs a debug statement
func (l*SysLogger) Debugf(formatstring, v...any) {
ifl.debug {
l.writer.Info(3, formatMsg("DEBUG", format, v...))
 }
}

// Tracef logs a trace statement
func (l*SysLogger) Tracef(formatstring, v...any) {
ifl.trace {
l.writer.Info(4, formatMsg("TRACE", format, v...))
 }
}