.net framework 使用Apollo 配置中心

参照了：https://www.cnblogs.com/xichji/p/11324893.html

Apollo默认有一个“SampleApp”应用，“DEV”环境 和 “timeout” KEY。

环境：VS2015，.net framework 4.5。

1.nuget 下载 ：Com.Ctrip.Framework.Apollo.ConfigurationManager   2.3.0。最新的2.6.2 我没安装成功。

2.修改web.config 增加：

<add key="Apollo.AppID" value="SampleApp" />
<add key="Apollo.Env" value="DEV" />
<add key="Apollo.MetaServer" value="http://192.168.192.100:8080" />

3.新建IApolloConfiguration

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace MyCompany.MyProject.Infrastructure
{
    /// <summary>
    /// 配置抽象接口。
    /// </summary>
    public interface IApolloConfiguration
    {
        /// <summary>
        /// 配置更改回调事件。
        /// </summary>
        //event EventHandler<ConfigurationChangeEventArgs> ConfigChanged;

        /// <summary>
        /// 获取配置项。
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="namespaces">命名空间集合</param>
        /// <returns></returns>
        string GetValue(string key, params string[] namespaces);

        /// <summary>
        /// 获取配置项。
        /// </summary>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="key">键</param>
        /// <param name="namespaces">命名空间集合</param>
        /// <returns></returns>
        TValue GetValue<TValue>(string key, params string[] namespaces);

        /// <summary>
        /// 获取配置项，如果值为 <see cref="null"/> 则取参数 <see cref="defaultValue"/> 值。
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="defaultValue">默认值</param>
        /// <param name="namespaces">命名空间集合</param>
        /// <returns></returns>
        string GetDefaultValue(string key, string defaultValue, params string[] namespaces);

        /// <summary>
        /// 获取配置项，如果值为 <see cref="null"/> 则取参数 <see cref="defaultValue"/> 值。
        /// </summary>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="key">键</param>
        /// <param name="defaultValue">默认值</param>
        /// <param name="namespaces">命名空间集合</param>
        /// <returns></returns>
        TValue GetDefaultValue<TValue>(string key, TValue defaultValue, params string[] namespaces);
    }

}

4.新建ApolloConfiguration

using Com.Ctrip.Framework.Apollo;
using Com.Ctrip.Framework.Apollo.Model;
using System;
using System.Globalization;

namespace MyCompany.MyProject.Infrastructure
{
    public class ApolloConfiguration : IApolloConfiguration
    {
        private readonly string _defaultValue = null;

        //public event EventHandler<ConfigurationChangeEventArgs> ConfigChanged;

        private IConfig GetConfig(params string[] namespaces)
        {
            var config = namespaces == null || namespaces.Length == 0 ?
                ApolloConfigurationManager.GetAppConfig().GetAwaiter().GetResult() :
                ApolloConfigurationManager.GetConfig(namespaces).GetAwaiter().GetResult();

            config.ConfigChanged += Config_ConfigChanged;

            return config;
        }

        private void Config_ConfigChanged(IConfig sender, ConfigChangeEventArgs args)
        {
            foreach (string key in args.ChangedKeys)
            {
                ConfigChange change = args.GetChange(key);
                // Console.WriteLine("Change - key: {0}, oldValue: {1}, newValue: {2}, changeType: {3}", change.PropertyName, change.OldValue, change.NewValue, change.ChangeType);
            }
        }

        public string GetValue(string key, params string[] namespaces)
        {
            if (string.IsNullOrWhiteSpace(key))
                throw new ArgumentNullException(nameof(key));
            
            var config = GetConfig(namespaces);
            return config.GetProperty(key, _defaultValue);
        }

        public TValue GetValue<TValue>(string key, params string[] namespaces)
        {
            var value = GetValue(key, namespaces);
            return value == null ?
                default(TValue) :
                (TValue)Convert.ChangeType(value, typeof(TValue), CultureInfo.InvariantCulture);
        }

        public string GetDefaultValue(string key, string defaultValue, params string[] namespaces)
        {
            if (string.IsNullOrWhiteSpace(key))
                throw new ArgumentNullException(nameof(key));

            var config = GetConfig(namespaces);
            return config.GetProperty(key, defaultValue);
        }

        public TValue GetDefaultValue<TValue>(string key, TValue defaultValue, params string[] namespaces)
        {
            var value = GetDefaultValue(key, defaultValue, namespaces);
            return value == null ?
                default(TValue) :
                (TValue)Convert.ChangeType(value, typeof(TValue), CultureInfo.InvariantCulture);
        }
    }
}

5.使用：

IApolloConfiguration config = new ApolloConfiguration();
            string aa = config.GetValue("timeout");

.