117 lines
2.5 KiB
Go
117 lines
2.5 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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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 logs
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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 = LevelTrace
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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 (c *ConnWriter) Init(jsonconfig string) error {
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return json.Unmarshal([]byte(jsonconfig), c)
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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 (c *ConnWriter) WriteMsg(msg string, level int) error {
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if level > c.Level {
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return nil
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}
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if c.neddedConnectOnMsg() {
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err := c.connect()
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if err != nil {
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return err
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}
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}
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if c.ReconnectOnMsg {
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defer c.innerWriter.Close()
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}
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c.lg.Println(msg)
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return nil
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}
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// implementing method. empty.
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func (c *ConnWriter) Flush() {
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}
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// destroy connection writer and close tcp listener.
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func (c *ConnWriter) Destroy() {
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if c.innerWriter != nil {
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c.innerWriter.Close()
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}
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}
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func (c *ConnWriter) connect() error {
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if c.innerWriter != nil {
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c.innerWriter.Close()
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c.innerWriter = nil
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}
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conn, err := net.Dial(c.Net, c.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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c.innerWriter = conn
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c.lg = log.New(conn, "", log.Ldate|log.Ltime)
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return nil
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}
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func (c *ConnWriter) neddedConnectOnMsg() bool {
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if c.Reconnect {
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c.Reconnect = false
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return true
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}
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if c.innerWriter == nil {
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return true
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}
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return c.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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