mirror of
https://gitee.com/johng/gf.git
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340 lines
9.6 KiB
Go
340 lines
9.6 KiB
Go
// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://gitee.com/johng/gf.
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// Package gcfg provides reading, caching and managing for configuration files.
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//
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// 配置管理,
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// 配置文件格式支持：json, xml, toml, yaml/yml
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package gcfg
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import (
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"bytes"
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"errors"
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"fmt"
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"gitee.com/johng/gf/g/container/garray"
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"gitee.com/johng/gf/g/container/gmap"
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"gitee.com/johng/gf/g/container/gtype"
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"gitee.com/johng/gf/g/container/gvar"
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"gitee.com/johng/gf/g/encoding/gjson"
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"gitee.com/johng/gf/g/os/gfile"
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"gitee.com/johng/gf/g/os/gfsnotify"
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"gitee.com/johng/gf/g/os/glog"
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"gitee.com/johng/gf/g/os/gspath"
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)
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const (
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DEFAULT_CONFIG_FILE = "config.toml" // 默认的配置管理文件名称
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)
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// 配置管理对象
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type Config struct {
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name *gtype.String // 默认配置文件名称
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paths *garray.StringArray // 搜索目录路径
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jsons *gmap.StringInterfaceMap // 配置文件对象
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vc *gtype.Bool // 层级检索是否执行分隔符冲突检测(默认为false，检测会比较影响检索效率)
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}
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// 生成一个配置管理对象
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func New(path string, file...string) *Config {
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name := DEFAULT_CONFIG_FILE
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if len(file) > 0 {
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name = file[0]
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}
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c := &Config {
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name : gtype.NewString(name),
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paths : garray.NewStringArray(0, 1),
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jsons : gmap.NewStringInterfaceMap(),
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vc : gtype.NewBool(),
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}
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if len(path) > 0 {
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c.SetPath(path)
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}
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return c
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}
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// 判断从哪个配置文件中获取内容，返回配置文件的绝对路径
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func (c *Config) filePath(file...string) (path string) {
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name := c.name.Val()
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if len(file) > 0 {
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name = file[0]
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}
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c.paths.RLockFunc(func(array []string) {
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for _, v := range array {
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if path, _ = gspath.Search(v, name); path != "" {
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break
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}
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}
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})
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if path == "" {
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buffer := bytes.NewBuffer(nil)
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buffer.WriteString(fmt.Sprintf("[gcfg] cannot find config file \"%s\" in following paths:", name))
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c.paths.RLockFunc(func(array []string) {
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for k, v := range array {
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buffer.WriteString(fmt.Sprintf("\n%d. %s",k + 1, v))
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}
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})
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glog.Error(buffer.String())
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}
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return path
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}
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// 设置配置管理器的配置文件存放目录绝对路径
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func (c *Config) SetPath(path string) error {
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realPath := gfile.RealPath(path)
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if realPath == "" {
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err := errors.New(fmt.Sprintf(`path "%s" does not exist`, path))
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glog.Error(fmt.Sprintf(`[gcfg] SetPath failed: %s`, err.Error()))
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return err
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}
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c.jsons.Clear()
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c.paths.Clear()
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c.paths.Append(realPath)
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glog.Debug("[gcfg] SetPath:", realPath)
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return nil
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}
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// 设置是否执行层级冲突检查，当键名中存在层级符号时需要开启该特性，默认为关闭。
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// 开启比较耗性能，也不建议允许键名中存在分隔符，最好在应用端避免这种情况。
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func (c *Config) SetViolenceCheck(check bool) {
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c.vc.Set(check)
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c.Reload()
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}
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// 添加配置管理器的配置文件搜索路径
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func (c *Config) AddPath(path string) error {
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realPath := gfile.RealPath(path)
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if realPath == "" {
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err := errors.New(fmt.Sprintf(`path "%s" does not exist`, path))
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glog.Error(fmt.Sprintf(`[gcfg] AddPath failed: %s`, err.Error()))
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return err
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}
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c.paths.Append(realPath)
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glog.Debug("[gcfg] AddPath:", realPath)
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return nil
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}
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// 获取指定文件的绝对路径，默认获取默认的配置文件路径
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func (c *Config) GetFilePath(file...string) string {
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return c.filePath(file...)
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}
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// 设置配置管理对象的默认文件名称
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func (c *Config) SetFileName(name string) {
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glog.Debug("[gcfg] SetFileName:", name)
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c.name.Set(name)
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}
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// 添加配置文件到配置管理器中，第二个参数为非必须，如果不输入表示添加进入默认的配置名称中
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func (c *Config) getJson(file...string) *gjson.Json {
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filePath := c.filePath(file...)
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if filePath == "" {
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return nil
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}
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if r := c.jsons.Get(filePath); r != nil {
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return r.(*gjson.Json)
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}
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if j, err := gjson.Load(filePath); err == nil {
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j.SetViolenceCheck(c.vc.Val())
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c.addMonitor(filePath)
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c.jsons.Set(filePath, j)
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return j
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} else {
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glog.Errorfln(`[gcfg] Load config file "%s" failed: %s`, filePath, err.Error())
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}
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return nil
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}
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// 获取配置项，当不存在时返回nil
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func (c *Config) Get(pattern string, file...string) interface{} {
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if j := c.getJson(file...); j != nil {
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return j.Get(pattern)
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}
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return nil
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}
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// 获得配置项，返回动态变量
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func (c *Config) GetVar(pattern string, file...string) gvar.VarRead {
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if j := c.getJson(file...); j != nil {
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return gvar.New(j.Get(pattern), true)
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}
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return gvar.New(nil, true)
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}
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// 获得一个键值对关联数组/哈希表，方便操作，不需要自己做类型转换
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// 注意，如果获取的值不存在，或者类型与json类型不匹配，那么将会返回nil
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func (c *Config) GetMap(pattern string, file...string) map[string]interface{} {
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if j := c.getJson(file...); j != nil {
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return j.GetMap(pattern)
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}
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return nil
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}
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// 获得一个数组[]interface{}，方便操作，不需要自己做类型转换
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// 注意，如果获取的值不存在，或者类型与json类型不匹配，那么将会返回nil
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func (c *Config) GetArray(pattern string, file...string) []interface{} {
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if j := c.getJson(file...); j != nil {
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return j.GetArray(pattern)
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}
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return nil
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}
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// 返回指定json中的string
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func (c *Config) GetString(pattern string, file...string) string {
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if j := c.getJson(file...); j != nil {
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return j.GetString(pattern)
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}
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return ""
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}
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func (c *Config) GetStrings(pattern string, file...string) []string {
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if j := c.getJson(file...); j != nil {
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return j.GetStrings(pattern)
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}
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return nil
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}
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func (c *Config) GetInterfaces(pattern string, file...string) []interface{} {
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if j := c.getJson(file...); j != nil {
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return j.GetInterfaces(pattern)
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}
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return nil
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}
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// 返回指定json中的bool
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func (c *Config) GetBool(pattern string, file...string) bool {
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if j := c.getJson(file...); j != nil {
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return j.GetBool(pattern)
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}
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return false
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}
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// 返回指定json中的float32
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func (c *Config) GetFloat32(pattern string, file...string) float32 {
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if j := c.getJson(file...); j != nil {
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return j.GetFloat32(pattern)
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}
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return 0
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}
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// 返回指定json中的float64
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func (c *Config) GetFloat64(pattern string, file...string) float64 {
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if j := c.getJson(file...); j != nil {
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return j.GetFloat64(pattern)
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}
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return 0
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}
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func (c *Config) GetFloats(pattern string, file...string) []float64 {
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if j := c.getJson(file...); j != nil {
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return j.GetFloats(pattern)
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}
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return nil
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}
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// 返回指定json中的float64->int
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func (c *Config) GetInt(pattern string, file...string) int {
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if j := c.getJson(file...); j != nil {
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return j.GetInt(pattern)
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}
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return 0
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}
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func (c *Config) GetInt8(pattern string, file...string) int8 {
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if j := c.getJson(file...); j != nil {
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return j.GetInt8(pattern)
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}
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return 0
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}
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func (c *Config) GetInt16(pattern string, file...string) int16 {
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if j := c.getJson(file...); j != nil {
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return j.GetInt16(pattern)
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}
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return 0
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}
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func (c *Config) GetInt32(pattern string, file...string) int32 {
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if j := c.getJson(file...); j != nil {
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return j.GetInt32(pattern)
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}
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return 0
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}
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func (c *Config) GetInt64(pattern string, file...string) int64 {
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if j := c.getJson(file...); j != nil {
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return j.GetInt64(pattern)
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}
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return 0
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}
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func (c *Config) GetInts(pattern string, file...string) []int {
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if j := c.getJson(file...); j != nil {
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return j.GetInts(pattern)
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}
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return nil
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}
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// 返回指定json中的float64->uint
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func (c *Config) GetUint(pattern string, file...string) uint {
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if j := c.getJson(file...); j != nil {
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return j.GetUint(pattern)
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}
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return 0
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}
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func (c *Config) GetUint8(pattern string, file...string) uint8 {
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if j := c.getJson(file...); j != nil {
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return j.GetUint8(pattern)
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}
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return 0
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}
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func (c *Config) GetUint16(pattern string, file...string) uint16 {
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if j := c.getJson(file...); j != nil {
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return j.GetUint16(pattern)
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}
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return 0
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}
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func (c *Config) GetUint32(pattern string, file...string) uint32 {
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if j := c.getJson(file...); j != nil {
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return j.GetUint32(pattern)
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}
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return 0
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}
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func (c *Config) GetUint64(pattern string, file...string) uint64 {
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if j := c.getJson(file...); j != nil {
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return j.GetUint64(pattern)
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}
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return 0
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}
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func (c *Config) GetToStruct(pattern string, objPointer interface{}, file...string) error {
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if j := c.getJson(file...); j != nil {
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return j.GetToStruct(pattern, objPointer)
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}
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return errors.New("config file not found")
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}
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// 清空当前配置文件缓存，强制重新从磁盘文件读取配置文件内容
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func (c *Config) Reload() {
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c.jsons.Clear()
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}
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// 添加文件监控
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func (c *Config) addMonitor(path string) {
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// 防止多goroutine同时调用
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if c.jsons.Get(path) != nil {
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return
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}
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gfsnotify.Add(path, func(event *gfsnotify.Event) {
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// 删除文件内容缓存，下一次查询会自动更新
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c.jsons.Remove(event.Path)
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})
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}
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