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Beego/pkg/logs/conn.go
2020-08-28 18:00:45 +01:00

133 lines
2.8 KiB
Go

// Copyright 2014 beego Author. All Rights Reserved.
//
// 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 logs
import (
"encoding/json"
"io"
"net"
"github.com/astaxie/beego/pkg/common"
)
// connWriter implements LoggerInterface.
// Writes messages in keep-live tcp connection.
type connWriter struct {
lg *logWriter
innerWriter io.WriteCloser
ReconnectOnMsg bool `json:"reconnectOnMsg"`
Reconnect bool `json:"reconnect"`
Net string `json:"net"`
Addr string `json:"addr"`
Level int `json:"level"`
}
// NewConn creates new ConnWrite returning as LoggerInterface.
func NewConn() Logger {
conn := new(connWriter)
conn.Level = LevelTrace
return conn
}
func (c *connWriter) Format(lm *LogMsg) string {
return lm.Msg
}
// Init initializes a connection writer with json config.
// json config only needs they "level" key
func (c *connWriter) Init(jsonConfig string, opts ...common.SimpleKV) error {
// for _, elem := range LogFormatter {
// if elem != nil {
// c.UseCustomFormatter = true
// c.CustomFormatter = elem
// }
// }
return json.Unmarshal([]byte(jsonConfig), c)
}
// WriteMsg writes message in connection.
// If connection is down, try to re-connect.
func (c *connWriter) WriteMsg(lm *LogMsg) error {
if lm.Level > c.Level {
return nil
}
if c.needToConnectOnMsg() {
err := c.connect()
if err != nil {
return err
}
}
if c.ReconnectOnMsg {
defer c.innerWriter.Close()
}
msg := c.Format(lm)
_, err := c.lg.writeln(msg)
if err != nil {
return err
}
return nil
}
// Flush implementing method. empty.
func (c *connWriter) Flush() {
}
// Destroy destroy connection writer and close tcp listener.
func (c *connWriter) Destroy() {
if c.innerWriter != nil {
c.innerWriter.Close()
}
}
func (c *connWriter) connect() error {
if c.innerWriter != nil {
c.innerWriter.Close()
c.innerWriter = nil
}
conn, err := net.Dial(c.Net, c.Addr)
if err != nil {
return err
}
if tcpConn, ok := conn.(*net.TCPConn); ok {
tcpConn.SetKeepAlive(true)
}
c.innerWriter = conn
c.lg = newLogWriter(conn)
return nil
}
func (c *connWriter) needToConnectOnMsg() bool {
if c.Reconnect {
return true
}
if c.innerWriter == nil {
return true
}
return c.ReconnectOnMsg
}
func init() {
Register(AdapterConn, NewConn)
}