该项目比较简单，只是单纯的把业务的dll模块和controller的dll做了一个动态的添加删除处理，目的就是插件开发。由于该项目过于简单，请勿吐槽。复杂的后续可以通过泛型的实体、dto等做业务和接口的动态区分。
项目结构如下：
上面的两个模块是独立通过dll加载道项目中的
repository动态的核心思想在此项目中是反射
public interface IRepositoryProvider { IRepository GetRepository(string serviceeName); } public class RepositoryProvider : IRepositoryProvider { public IRepository GetRepository(string x) { var path = $"{Directory.GetCurrentDirectory()}\lib\{x}.Repository.dll"; var _AssemblyLoadContext = new AssemblyLoadContext(Guid.NewGuid().ToString("N"), true); Assembly assembly = null; using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read)) { assembly = _AssemblyLoadContext.LoadFromStream(fs); } //var assembly = Assembly.LoadFrom(path); var types = assembly.GetTypes() .Where(t => typeof(IRepository).IsAssignableFrom(t) && !t.IsInterface); return (IRepository)Activator.CreateInstance(types.First()); } }
通过一个provider注入来获取示例，这个repository的示例既然是动态热拔插，能想到暂时只能是反射来做这一块了。
using Autofac; using IOrder.Repository; using Order.Repository; namespace AutofacRegister { public class RepositoryModule:Module { protected override void Load(ContainerBuilder builder) { //builder.RegisterType<Repository>().As<IRepository>().SingleInstance(); builder.RegisterType<RepositoryProvider>().As<IRepositoryProvider>().InstancePerLifetimeScope(); } } }
controller插件这一块大同小异，这个控制器是通过程序集注入来实现的
public class MyControllerFilter : IStartupFilter { private readonly PluginManager pluginManager; List<string> controllers = new List<string> { "First","Second" }; public MyControllerFilter(PluginManager pluginManager) { this.pluginManager = pluginManager; controllers.ForEach(x => pluginManager.LoadPlugins($"{Directory.GetCurrentDirectory()}\lib\", $"{x}.Impl.dll")); } Action<IApplicationBuilder> IStartupFilter.Configure(Action<IApplicationBuilder> next) { BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly; return app => { app.UseRouting(); app.UseEndpoints(endpoints => { foreach (IPlugin item in pluginManager.GetPlugins()) { foreach (MethodInfo mi in item.GetType().GetMethods(bindingFlags)) { endpoints.MapPost($"/{item.GetType().Name.Replace("Service", "")}/{mi.Name}", async (string parameters, HttpContext cotext) => { var task = (Task)mi.Invoke(item, new object[] { parameters }); if (task is Task apiTask) { await apiTask; // 如果任务有返回结果 if (apiTask is Task<object> resultTask) { var res = await resultTask; return Results.Ok(JsonConvert.SerializeObject(res)); } } // 如果方法没有返回 Task<ApiResult>，返回 NotFound return Results.NotFound("Method execution did not return a result."); }); } } }); next(app); }; } }
但是有一个问题,它的变化势必需要重新渲染整个controller,我只能重启他的服务了。
using Microsoft.Extensions.Hosting; using System; using System.Diagnostics; using System.IO; using System.Threading; using System.Threading.Tasks; namespace StartupDiagnostics { public class FileWatcherService : IHostedService { private readonly string _watchedFolder; private FileSystemWatcher _fileSystemWatcher; private readonly IHostApplicationLifetime _appLifetime; public FileWatcherService(IHostApplicationLifetime appLifetime) { _watchedFolder =Path.Combine(Directory.GetCurrentDirectory(),"lib"); //细化指定类型的dll _appLifetime = appLifetime; } public Task StartAsync(CancellationToken cancellationToken) { _fileSystemWatcher = new FileSystemWatcher(_watchedFolder); _fileSystemWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName; _fileSystemWatcher.Changed += OnFileChanged; _fileSystemWatcher.Created += OnFileChanged; _fileSystemWatcher.Deleted += OnFileChanged; _fileSystemWatcher.Renamed += OnFileChanged; _fileSystemWatcher.EnableRaisingEvents = true; return Task.CompletedTask; } public Task StopAsync(CancellationToken cancellationToken) { _fileSystemWatcher.Dispose(); return Task.CompletedTask; } private void OnFileChanged(object sender, FileSystemEventArgs e) { // 文件夹内容发生变化时重新启动应用程序 var processStartInfo = new ProcessStartInfo { FileName = "dotnet", Arguments = $"exec "{System.Reflection.Assembly.GetEntryAssembly().Location}"", UseShellExecute = false }; _appLifetime.ApplicationStopped.Register(() => { Process.Start(processStartInfo); }); _appLifetime.StopApplication(); } } }
repository这一块页面效果没法展示，
controllerr可以通过swagger来看看，first和second这可以通过删除dll和添加dll来增加和删除controller给第三方。
这是控制台展示的重启效果
源代码如下：
