logs support elasticsearch adapter

+package es
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"net/url"
+	"time"
+
+	"github.com/astaxie/beego/logs"
+	"github.com/belogik/goes"
+)
+
+func NewES() logs.LoggerInterface {
+	cw := &esLogger{
+		Level: logs.LevelDebug,
+	}
+	return cw
+}
+
+type esLogger struct {
+	*goes.Connection
+	DSN   string `json:"dsn"`
+	Level int    `json:"level"`
+}
+
+// {"dsn":"http://localhost:9200/","level":1}
+func (el *esLogger) Init(jsonconfig string) error {
+	err := json.Unmarshal([]byte(jsonconfig), el)
+	if err != nil {
+		return err
+	}
+	if el.DSN == "" {
+		return errors.New("empty dsn")
+	} else if u, err := url.Parse(el.DSN); err != nil {
+		return err
+	} else if u.Path == "" {
+		return errors.New("missing prefix")
+	} else if host, port, err := net.SplitHostPort(u.Host); err != nil {
+		return err
+	} else {
+		conn := goes.NewConnection(host, port)
+		el.Connection = conn
+	}
+	return nil
+}
+
+func (el *esLogger) WriteMsg(msg string, level int) error {
+	if level > el.Level {
+		return nil
+	}
+	t := time.Now()
+	vals := make(map[string]interface{})
+	vals["@timestamp"] = t.Format(time.RFC3339)
+	vals["@msg"] = msg
+	d := goes.Document{
+		Index:  fmt.Sprintf("%04d.%02d.%02d", t.Year(), t.Month(), t.Day()),
+		Type:   "logs",
+		Fields: vals,
+	}
+	_, err := el.Index(d, nil)
+	return err
+}
+
+func (el *esLogger) Destroy() {
+
+}
+
+func (el *esLogger) Flush() {
+
+}
+
+func init() {
+	logs.Register("es", NewES)
+}