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142 lines
3.0 KiB
142 lines
3.0 KiB
// 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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"fmt"
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"io"
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"net"
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"github.com/pkg/errors"
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)
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// connWriter implements LoggerInterface.
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// Writes messages in keep-live tcp connection.
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type connWriter struct {
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lg *logWriter
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innerWriter io.WriteCloser
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formatter LogFormatter
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Formatter string `json:"formatter"`
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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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// NewConn creates new ConnWrite returning as LoggerInterface.
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func NewConn() Logger {
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conn := new(connWriter)
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conn.Level = LevelTrace
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conn.formatter = conn
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return conn
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}
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func (c *connWriter) Format(lm *LogMsg) string {
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return lm.OldStyleFormat()
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}
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// Init initializes a connection writer with json config.
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// json config only needs they "level" key
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func (c *connWriter) Init(config string) error {
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res := json.Unmarshal([]byte(config), c)
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if res == nil && len(c.Formatter) > 0 {
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fmtr, ok := GetFormatter(c.Formatter)
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if !ok {
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return errors.New(fmt.Sprintf("the formatter with name: %s not found", c.Formatter))
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}
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c.formatter = fmtr
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}
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return res
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}
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func (c *connWriter) SetFormatter(f LogFormatter) {
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c.formatter = f
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}
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// WriteMsg writes message in connection.
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// If connection is down, try to re-connect.
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func (c *connWriter) WriteMsg(lm *LogMsg) error {
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if lm.Level > c.Level {
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return nil
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}
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if c.needToConnectOnMsg() {
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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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msg := c.formatter.Format(lm)
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_, err := c.lg.writeln(msg)
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if err != nil {
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return err
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}
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return nil
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}
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// Flush implementing method. empty.
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func (c *connWriter) Flush() {
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}
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// Destroy 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 = newLogWriter(conn)
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return nil
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}
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func (c *connWriter) needToConnectOnMsg() bool {
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if c.Reconnect {
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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(AdapterConn, NewConn)
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}
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