Add global instance for config module

core/config/global.go

@@ -0,0 +1,115 @@
+// 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 config
+
+import (
+	"github.com/astaxie/beego/core/logs"
+)
+
+// We use this to simply application's development
+// for most users, they only need to use those methods
+var globalInstance Configer
+
+func init() {
+	// Ignore this error
+	err := InitGlobalInstance("ini", "config/app.conf")
+	if err != nil {
+		logs.Warn("init global config instance failed. If you donot use this, just ignore it. ", err)
+	}
+
+}
+
+// InitGlobalInstance will ini the global instance
+// If you want to use specific implementation, don't forget to import it.
+// e.g. _ import "github.com/astaxie/beego/core/config/etcd"
+// err := InitGlobalInstance("etcd", "someconfig")
+func InitGlobalInstance(name string, cfg string) error {
+	var err error
+	globalInstance, err = NewConfig(name, cfg)
+	return err
+}
+
+// support section::key type in given key when using ini type.
+func Set(key, val string) error {
+	return globalInstance.Set(key, val)
+}
+
+// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+func String(key string) (string, error) {
+	return globalInstance.String(key)
+}
+
+// get string slice
+func Strings(key string) ([]string, error) {
+	return globalInstance.Strings(key)
+}
+func Int(key string) (int, error) {
+	return globalInstance.Int(key)
+}
+func Int64(key string) (int64, error) {
+	return globalInstance.Int64(key)
+}
+func Bool(key string) (bool, error) {
+	return globalInstance.Bool(key)
+}
+func Float(key string) (float64, error) {
+	return globalInstance.Float(key)
+}
+
+// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+func DefaultString(key string, defaultVal string) string {
+	return globalInstance.DefaultString(key, defaultVal)
+}
+
+// get string slice
+func DefaultStrings(key string, defaultVal []string) []string {
+	return globalInstance.DefaultStrings(key, defaultVal)
+}
+func DefaultInt(key string, defaultVal int) int {
+	return globalInstance.DefaultInt(key, defaultVal)
+}
+func DefaultInt64(key string, defaultVal int64) int64 {
+	return globalInstance.DefaultInt64(key, defaultVal)
+}
+func DefaultBool(key string, defaultVal bool) bool {
+	return globalInstance.DefaultBool(key, defaultVal)
+}
+func DefaultFloat(key string, defaultVal float64) float64 {
+	return globalInstance.DefaultFloat(key, defaultVal)
+}
+
+// DIY return the original value
+func DIY(key string) (interface{}, error) {
+	return globalInstance.DIY(key)
+}
+
+func GetSection(section string) (map[string]string, error) {
+	return globalInstance.GetSection(section)
+}
+
+func Unmarshaler(prefix string, obj interface{}, opt ...DecodeOption) error {
+	return globalInstance.Unmarshaler(prefix, obj, opt...)
+}
+func Sub(key string) (Configer, error) {
+	return globalInstance.Sub(key)
+}
+
+func OnChange(key string, fn func(value string)) {
+	globalInstance.OnChange(key, fn)
+}
+
+func SaveConfigFile(filename string) error {
+	return globalInstance.SaveConfigFile(filename)
+}