Add IndexNaming interface so users can custom the index name when they use es as the logger

pkg/infrastructure/logs/es/es.go

@@ -19,6 +19,7 @@ import (
 func NewES() logs.Logger {
 	cw := &esLogger{
 		Level:       logs.LevelDebug,
+		indexNaming: indexNaming,
 	}
 	return cw
 }
@@ -35,6 +36,8 @@ type esLogger struct {
 	Level     int    `json:"level"`
 	formatter logs.LogFormatter
 	Formatter string `json:"formatter"`
+
+	indexNaming IndexNaming
 }
 
 func (el *esLogger) Format(lm *logs.LogMsg) string {
@@ -96,7 +99,7 @@ func (el *esLogger) WriteMsg(lm *logs.LogMsg) error {
 	msg := el.formatter.Format(lm)
 
 	req := esapi.IndexRequest{
-		Index:        fmt.Sprintf("%04d.%02d.%02d", lm.When.Year(), lm.When.Month(), lm.When.Day()),
+		Index:        indexNaming.IndexName(lm),
 		DocumentType: "logs",
 		Body:         strings.NewReader(msg),
 	}

pkg/infrastructure/logs/es/index.go

@@ -0,0 +1,39 @@
+// Copyright 2020
+//
+// 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 es
+
+import (
+	"fmt"
+
+	"github.com/astaxie/beego/pkg/infrastructure/logs"
+)
+
+// IndexNaming generate the index name
+type IndexNaming interface {
+	IndexName(lm *logs.LogMsg) string
+}
+
+var indexNaming IndexNaming = &defaultIndexNaming{}
+
+// SetIndexNaming will register global IndexNaming
+func SetIndexNaming(i IndexNaming) {
+	indexNaming = i
+}
+
+type defaultIndexNaming struct{}
+
+func (d *defaultIndexNaming) IndexName(lm *logs.LogMsg) string {
+	return fmt.Sprintf("%04d.%02d.%02d", lm.When.Year(), lm.When.Month(), lm.When.Day())
+}

pkg/infrastructure/logs/es/index_test.go

@@ -0,0 +1,34 @@
+// Copyright 2020
+//
+// 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 es
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/astaxie/beego/pkg/infrastructure/logs"
+)
+
+func TestDefaultIndexNaming_IndexName(t *testing.T) {
+	tm := time.Date(2020, 9, 12, 1, 34, 45, 234, time.UTC)
+	lm := &logs.LogMsg{
+		When: tm,
+	}
+
+	res := (&defaultIndexNaming{}).IndexName(lm)
+	assert.Equal(t, "2020.09.12", res)
+}