前言
最近在用 Golang 做前端配置中心服务，想实现配置文件层级加载合并的功能，比如我们有业务域名 ram.console.liusuyun.com 我们希望它可以加载:
- ram.console.liusuyun.com
- console.liusuyun.com
- liusuyun.com
三个配置文件，合并后发送给前端，于是便有了如下功能的开发。
实现
package utils
import (
"reflect"
)
func MergeMany(sources ...map[string]interface{}) map[string]interface{} {
base := sources[0]
if len(sources) > 1 {
for index, source := range sources {
if index != 0 {
MergeBoth(source, base)
}
}
}
return base
}
func MergeBoth(from map[string]interface{}, to map[string]interface{}) {
for key, value := range from {
switch reflect.TypeOf(value).Kind() {
case reflect.Map:
if valueGq, ok := to[key]; ok {
MergeBoth(value.(map[string]interface{}), valueGq.(map[string]interface{}))
} else {
to[key] = value
}
case reflect.Slice, reflect.Array:
if valueGq, ok := to[key]; ok {
valueGyq := make([]interface{}, 0)
//
origin := reflect.ValueOf(value)
for i := 0; i < origin.Len(); i++ {
valueGyq = append(valueGyq, origin.Index(i).Interface())
}
origin = reflect.ValueOf(valueGq)
for i := 0; i < origin.Len(); i++ {
valueGyq = append(valueGyq, origin.Index(i).Interface())
}
//
to[key] = valueGyq
} else {
to[key] = value
}
default:
to[key] = value
}
}
}
package utils
import (
"testing"
)
func TestMergeMany(t *testing.T) {
x := map[string]interface{}{
"l": "0",
"x": "1",
"y": [...]int{2, 3},
"z": map[interface{}]interface{}{
"x": "6",
},
}
y := map[string]interface{}{
"l": "-1",
"y": [...]int{4, 5},
"z": map[interface{}]interface{}{
"y": "7",
},
}
z := MergeMany(x, y)
println(z)
}
完结撒花~
