1.14 配置框架：自定义配置数据源与配置中心方案

1.14 配置框架：自定义配置数据源与配置中心方案.pdf

MyConfigurationSource：

class MyConfigurationSource : IConfigurationSource
{
    public IConfigurationProvider Build(IConfigurationBuilder builder)
    {
        return new MyConfigurationProvider();
    }
}

MyConfigurationProvider：

class MyConfigurationProvider : ConfigurationProvider
{
    // 使用 timer 创建一个线程来模拟配置发生变化
    private readonly Timer _timer;
    public MyConfigurationProvider() : base()
    {
        _timer = new Timer();
        _timer.Elapsed += Timer_Elapsed;
        _timer.Interval = 3000;
        _timer.Start();
    }
    private void Timer_Elapsed(object sender, ElapsedEventArgs e)
    {
        Load(true);
    }
    public override void Load()
    {
        // 加载数据
        Load(false);
    }
    void Load(bool reload)
    {
        this.Data["lastTime"] = DateTime.Now.ToString();
        if (reload)
        {
            base.OnReload();
        }
    }
}

MyConfigurationBuilderExtensions：

public static class MyConfigurationBuilderExtensions
{
    public static IConfigurationBuilder AddMyConfiguration(this IConfigurationBuilder builder)
    {
        builder.Add(new MyConfigurationSource());
        return builder;
    }
}

具体使用：

static void Main(string[] args)
{
    var builder = new ConfigurationBuilder();
    //builder.Add(new MyConfigurationSource());
    //var configRoot = builder.Build();
    //Console.WriteLine($"lastTIme:{configRoot["lastTIme"]}");
    builder.AddMyConfiguration();
    var configRoot = builder.Build();
    ChangeToken.OnChange(() => configRoot.GetReloadToken(), () =>
    {
        Console.WriteLine($"lastTime:{configRoot["lastTime"]}");
    });
    Console.WriteLine("开始了");
    Console.ReadKey();
}