一個簡單的配置管理器(SettingManager)

時間 2019-12-08

標籤一個簡單配置管理器 settingmanager 简体版

原文原文鏈接

在不少.net開發的項目中，咱們幾乎都會使用到一些自定義的參數，好比說第三方的配置參數之類的.數據庫

他們的特色是:1.系統全局 2,能夠作成鍵值對(Dictionary).app

咱們能夠將這些參數放到Web.config,xml或者數據庫表中,固然部分不常變的能夠直接寫在程序中.ide

爲了方便我一般喜歡將他們統放在一個配置管理器中,而後但願別人使用時, 能夠像使用AppSetings中的參數同樣測試

初看起來仍是比較容易實現，在ConfiguratonManager中定義一個公開屬性AppSettings就行了.優化

實現以下:this

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 = "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

最底層是一個單例模式,並封裝了字典的CRUD操做。spa

客戶端測試一下:.net

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

好像也能運行。3d

那麼，問題來了!測試代碼改一改,code

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

代碼崩潰了，老兄!

其實上面的代碼可以知足通常的需求，可是對使用着來講，仍然不太方便.因此我和同事進一步優化了上述代碼.

如今變得更加簡潔了.

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 = 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 = false;
            bool.TryParse(Settings[key], out value);
            return value;
        }

        public static int GetIntValue(string key)
        {
            int value = 0;
            int.TryParse(Settings[key], out value);
            return value;
        }
    }