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)
+}

core/config/global_test.go

@@ -0,0 +1,104 @@
+// 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 (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGlobalInstance(t *testing.T) {
+	cfgStr := `
+appname = beeapi
+httpport = 8080
+mysqlport = 3600
+PI = 3.1415926
+runmode = "dev"
+autorender = false
+copyrequestbody = true
+session= on
+cookieon= off
+newreg = OFF
+needlogin = ON
+enableSession = Y
+enableCookie = N
+developer="tom;jerry"
+flag = 1
+path1 = ${GOPATH}
+path2 = ${GOPATH||/home/go}
+[demo]
+key1="asta"
+key2 = "xie"
+CaseInsensitive = true
+peers = one;two;three
+password = ${GOPATH}
+`
+	path := os.TempDir() + string(os.PathSeparator) + "test_global_instance.ini"
+	f, err := os.Create(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = f.WriteString(cfgStr)
+	if err != nil {
+		f.Close()
+		t.Fatal(err)
+	}
+	f.Close()
+	defer os.Remove(path)
+
+	err = InitGlobalInstance("ini", path)
+	assert.Nil(t, err)
+
+	val, err := String("appname")
+	assert.Nil(t, err)
+	assert.Equal(t, "beeapi", val)
+
+	val = DefaultString("appname__", "404")
+	assert.Equal(t, "404", val)
+
+	vi, err := Int("httpport")
+	assert.Nil(t, err)
+	assert.Equal(t, 8080, vi)
+	vi = DefaultInt("httpport__", 404)
+	assert.Equal(t, 404, vi)
+
+	vi64, err := Int64("mysqlport")
+	assert.Nil(t, err)
+	assert.Equal(t, int64(3600), vi64)
+	vi64 = DefaultInt64("mysqlport__", 404)
+	assert.Equal(t, int64(404), vi64)
+
+	vf, err := Float("PI")
+	assert.Nil(t, err)
+	assert.Equal(t, 3.1415926, vf)
+	vf = DefaultFloat("PI__", 4.04)
+	assert.Equal(t, 4.04, vf)
+
+	vb, err := Bool("copyrequestbody")
+	assert.Nil(t, err)
+	assert.True(t, vb)
+
+	vb = DefaultBool("copyrequestbody__", false)
+	assert.False(t, vb)
+
+	vss := DefaultStrings("developer__", []string{"tom", ""})
+	assert.Equal(t, []string{"tom", ""}, vss)
+
+	vss, err = Strings("developer")
+	assert.Nil(t, err)
+	assert.Equal(t, []string{"tom", "jerry"}, vss)
+}