一个简单的配置管理器(SettingManager)

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一个简单的配置管理器(SettingManager)

2024-10-21 05:44:39 202人阅读

在很多.net开发的项目中，我们几乎都会使用到一些自定义的参数，比如说第三方的配置参数之类的.

他们的特点是:1.系统全局 2,可以做成键值对(Dictionary).

我们可以将这些参数放到Web.config,xml或者数据库表中,当然部分不常变的可以直接写在程序中.

为了方便我通常喜欢将他们统放在一个配置管理器中,然后希望别人使用时, 可以像使用AppSetings中的参数一样

技术分享

初看起来还是比较容易实现，在ConfiguratonManager中定义一个公开属性AppSettings就好了.

实现如下:

using System;using System.Collections.Generic;using System.Collections.ObjectModel;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConfigManager{    public class ConfigurationContainer    {        private static ConfigurationContainer m_Instance = null;        public static ConfigurationContainer Instance        {            get            {                if (m_Instance == null)                    m_Instance = new ConfigurationContainer();                return m_Instance;            }        }        private ConfigurationContainer()        {        }        private ReadOnlyDictionary<string, string> _configuration;        private Dictionary<string, string> _mutableConfiguration;        public ReadOnlyDictionary<string, string> Configuration        {            get            {                //TODO:check is newest or not in database??                if (_mutableConfiguration == null)                    Init();                _configuration =                    new ReadOnlyDictionary<string, string>(_mutableConfiguration);                return _configuration;            }        }        public bool Add(string key, string value)        {            bool bRet = false;            if (!_mutableConfiguration.ContainsKey(key))            {                _mutableConfiguration.Add(key, value);                bRet = true;            }            return bRet;        }        public bool Update(string key, string value)        {            bool bRet = false;            if (_mutableConfiguration.ContainsKey(key))            {                _mutableConfiguration[key] = value;                bRet = true;            }            return bRet;        }        public bool Remove(string key)        {            bool bRet = false;            if (_mutableConfiguration.ContainsKey(key))            {                _mutableConfiguration.Remove(key);                bRet = true;            }            return bRet;        }        //private bool ConfigurationAllowed(string key, string value)        //{        //    // Put in your checks and balances        //    // here and return the appropriate result        //    return true;        //}        private void Init()        {            _mutableConfiguration = new Dictionary<string, string>();            _mutableConfiguration.Add("key", "value");            _mutableConfiguration.Add("key1", "value1");            _mutableConfiguration["key2"] = "value2";        }    }}

View Code

ConfigurationContainer:using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConfigManager{    public class ConfigManager    {        private static IReadOnlyDictionary<string, string> _AppSettings = null;        public static IReadOnlyDictionary<string, string> Appettings        {            get            {                //initial ensurer the newest                _AppSettings = ConfigurationContainer.Instance.Configuration;                return _AppSettings;            }        }        //Exception:Violence to  Add        public static void BeNaughtyWithConfiguration()        {            IDictionary<string, string> convertToReadWrite                = (IDictionary<string, string>)_AppSettings;            //ConfigElement element = convertToReadWrite["key"];            //element.Value = "http://www.mamicode.com/Haa Haa";            //Console.WriteLine(element.Value);            //Console.WriteLine(convertToReadWrite["key"]);            //Console.ReadLine();            convertToReadWrite.Add("Key12345", "xsds");        }        public static bool Add(string key, string value)        {            return ConfigurationContainer.Instance.Add(key, value);        }        public static bool Update(string key, string value)        {            return ConfigurationContainer.Instance.Update(key, value);        }        public static bool Remove(string key)        {            return ConfigurationContainer.Instance.Remove(key);        }    }}

View Code

最底层是一个单例模式,并封装了字典的CRUD操作。

客户端测试一下:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConfigManager{    class Program    {        static void Main(string[] args)        {            var settings = ConfigManager.Appettings;                        foreach(var item in settings)            {                Console.WriteLine("key:{0},value:{1}",item.Key,item.Value);            }            var t1 = ConfigManager.Appettings["key1"];            //test add            ConfigManager.Add("t","test");            //var t2 = ConfigManager.Appettings;            //update            ConfigManager.Update("t","test123");            //remove            ConfigManager.Remove("t");            Console.ReadKey();        }    }}

View Code

技术分享

好像也能运行。

那么，问题来了!测试代码改一改,

//test not item in Dictionary var t2 = ConfigManager.Appettings["luckyhu"];

技术分享

代码崩溃了，老兄!

其实上面的代码能够满足一般的需求，但是对使用着来说，仍然不太方便.所以我和同事进一步优化了上述代码.

现在变得更加简洁了.

public class SettingManager : Dictionary<string, string>    {        private static SettingManager _Settings = null;        public static SettingManager Settings        {            get            {                if (_Settings == null)                    _Settings = new SettingManager();                return _Settings;            }        }        private SettingManager()        {            //Init Data            //DataSoure:truely data here...            for (int i = 0; i < 10; i++)            {                var key = String.Format("key{0}", i);                var value = http://www.mamicode.com/String.Format("value{0}", i);                if (!this.Keys.Contains(key))                    this.Add(key, value);            }        }        public string this[string key]        {            get            {                if (!this.ContainsKey(key))                    return String.Empty;                return base[key];            }            set            {                base[key] = value;            }        }        public static bool GetBoolValue(string key)        {            bool value = http://www.mamicode.com/false;            bool.TryParse(Settings[key], out value);            return value;        }        public static int GetIntValue(string key)        {            int value = http://www.mamicode.com/0;            int.TryParse(Settings[key], out value);            return value;        }    }