105 lines
2 KiB
Go
105 lines
2 KiB
Go
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// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package log
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import (
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"encoding/json"
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"io"
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"log"
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"net"
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)
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// ConnWriter implements LoggerInterface.
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// it writes messages in keep-live tcp connection.
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type ConnWriter struct {
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lg *log.Logger
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innerWriter io.WriteCloser
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ReconnectOnMsg bool `json:"reconnectOnMsg"`
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Reconnect bool `json:"reconnect"`
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Net string `json:"net"`
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Addr string `json:"addr"`
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Level int `json:"level"`
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}
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// create new ConnWrite returning as LoggerInterface.
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func NewConn() LoggerInterface {
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conn := new(ConnWriter)
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conn.Level = TRACE
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return conn
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}
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// init connection writer with json config.
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// json config only need key "level".
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func (cw *ConnWriter) Init(jsonconfig string) error {
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return json.Unmarshal([]byte(jsonconfig), cw)
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}
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// write message in connection.
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// if connection is down, try to re-connect.
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func (cw *ConnWriter) WriteMsg(msg string, skip, level int) error {
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if cw.Level > level {
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return nil
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}
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if cw.neddedConnectOnMsg() {
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if err := cw.connect(); err != nil {
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return err
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}
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}
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if cw.ReconnectOnMsg {
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defer cw.innerWriter.Close()
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}
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cw.lg.Println(msg)
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return nil
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}
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func (_ *ConnWriter) Flush() {
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}
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// destroy connection writer and close tcp listener.
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func (cw *ConnWriter) Destroy() {
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if cw.innerWriter == nil {
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return
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}
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cw.innerWriter.Close()
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}
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func (cw *ConnWriter) connect() error {
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if cw.innerWriter != nil {
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cw.innerWriter.Close()
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cw.innerWriter = nil
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}
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conn, err := net.Dial(cw.Net, cw.Addr)
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if err != nil {
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return err
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}
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if tcpConn, ok := conn.(*net.TCPConn); ok {
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tcpConn.SetKeepAlive(true)
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}
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cw.innerWriter = conn
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cw.lg = log.New(conn, "", log.Ldate|log.Ltime)
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return nil
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}
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func (cw *ConnWriter) neddedConnectOnMsg() bool {
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if cw.Reconnect {
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cw.Reconnect = false
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return true
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}
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if cw.innerWriter == nil {
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return true
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}
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return cw.ReconnectOnMsg
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}
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func init() {
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Register("conn", NewConn)
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}
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