理想很丰满，现实往往很残酷。
一种按照ddd的方式，根据业务来把自己需要的模块一个一个写出来，再按照模块把需要的接口一个一个的写出来，堆砌一些中间件，以及解耦的command，handler等等
，一个项目就这么成型了。上面的项目有一个非常清晰的特点，就是按需开发，不需要去可以定义业务相关的公共的模块，有就有没就没。这项目看起来没有什么公共框架，就是一个项目。当然这样效率性能也是最高的，不需要过多的包装一层又一层的公共代码。
有关示例如下，不做过多的赘述：
liuzhixin405/netcore-micro (github.com)
一种业务非常大，开发人员只需要写业务实现，这就需要一个公共框架，提供公共的可复制模块让业务人员写业务代码。
下面以为简洁的方式呈现这种开发模式，项目层级如下：
三个模块分别是业务模块，主机，基础模块。业务模块Business通过dll形式提供给host来完成注册和发布。
主机host可以存放公共的基础模块，例如注册、登录、认证等，这里省略。
业务模块存放业务代码，包括提供接口。
流程如下：request => 业务模块controller => business => service=> repository
整个项目接口不变，实现可各异。
在仓储层定义几个公共的方法，
public interface IRepository<TEntity,TID> where TEntity : IEntity<TID>
{
Task<ApiResult> AddAsync(TEntity entity);
Task<ApiResult> UpdateAsync(TEntity entity);
Task<ApiResult> DeleteAsync(Expression<Func<TEntity, bool>> filter);
Task<ApiResult> DeleteAsync(TID id);
// 通用分页查询
Task<PagedResult<TEntity>> GetPagedAsync(PagingParameters<TEntity> pagingParameters);
// 其他常用操作
Task<IEnumerable<TEntity>> FindAsync(Expression<Func<TEntity, bool>> filter);
}服务层也是同样的方法
[Intercept("business-service log")]
public interface IService
{
Task<ApiResult> AddAsync(IRequestDto requestDto);
Task<ApiResult> UpdateAsync(IRequestDto requestDto);
Task<ApiResult> DeleteAsyncc(IRequestDto requestDto);
Task<ApiResult> GetPagedAsyncc(IRequestDto requestDto) ;
Task<ApiResult> FindAsyncc(IRequestDto requestDto);
}依赖注入还是老一套，实现它就行。
public interface IModule
{
void ConfigureService(IServiceCollection services, IConfiguration configuration = null);
void Configure(IApplicationBuilder app, IWebHostEnvironment env = null);
}
public abstract class ModuleBase : IModule
{
public virtual void ConfigureService(IServiceCollection services, IConfiguration configuration = null)
{
}
public virtual void Configure(IApplicationBuilder app, IWebHostEnvironment env = null)
{
}
}在主机通过扫描assembly来注册服务
using Microsoft.AspNetCore.Mvc.ApplicationParts;
using Project.Base.Reflect;
using System.Reflection;
using Project.Base.ProjExtension;
using Project.Base.Common;
using Project.Base.DependencyInjection;
using Project.Base.Module;
namespace Project.Host
{
public class Program
{
public static void Main(string[] args)
{
var builder = WebApplication.CreateBuilder(args);
builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
builder.Configuration.AddJsonFile($"appsettings.{builder.Environment.EnvironmentName}.json", optional: true, reloadOnChange: true);
builder.Configuration.AddJsonFile("appsettings.Modules.json", optional: false, reloadOnChange: true);
//IModule注入 ,然后扫描调用ConfigureService，Business注入需要的服务入口
builder.Services.InitModule(builder.Configuration);
var sp = builder.Services.BuildServiceProvider();
var moduleInitializers = sp.GetServices<IModule>();
foreach (var moduleInitializer in moduleInitializers)
{
moduleInitializer.ConfigureService(builder.Services, builder.Configuration);
}
// Add services to the container.
var assemblys = GolbalConfiguration.Modules.Select(x => x.Assembly).ToList();
var mvcBuilder=builder.Services.AddControllers().ConfigureApplicationPartManager(apm => {
var folder = Path.Combine(Directory.GetCurrentDirectory(), "bus_lib");
var serviceList = (builder.Configuration.GetSection("ServiceList").Get<string[]>()) ?? new string[] { "ADM" };//默认加载基础服务
string[] serviceFiles = Directory.GetFiles(folder, "*.Api.dll").Where(x =>
serviceList.Any(y => x.Contains(y))
).ToArray();
foreach (var file in serviceFiles)
{
if (File.Exists(file))
{
var assembly = Assembly.LoadFrom(file);
var controllerAssemblyPart = new AssemblyPart(assembly);
apm.ApplicationParts.Add(controllerAssemblyPart);
}
}
});
foreach (var assembly in assemblys)
{
// 扫描并注册其他程序集中的控制器
mvcBuilder.AddApplicationPart(assembly);
// 扫描并注册其他程序集中的服务 针对特性注入
builder.Services.ReisterServiceFromAssembly(assembly);
}
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddBusinessServices();
var app = builder.Build();
ServiceLocator.Instance = app.Services;
//imodule 的Configure调用,business可以实现中间件等操作
foreach (var moduleInitializer in moduleInitializers)
{
moduleInitializer.Configure(app, app.Environment);
}
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
}
}
}业务需求注入代码如下：
using ADM001_User.Model;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Bson.Serialization;
using MongoDB.Bson;
using MongoDB.Driver;
using Project.Base.IRepository;
using Project.Base.Module;
using Project.Base.Reflect;
using Project.Base.Repository;
using Project.Base.Services;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ADM001_User.Business.Settings;
using Project.Base.Model;
namespace ADM001_User.Business
{
public class UserModule : ModuleBase
{
public override void ConfigureService(IServiceCollection services, IConfiguration configuration = null)
{
services.AddDbContext<UserDbContext>(options =>
options.UseInMemoryDatabase("InMemoryDb"));
services.AddScoped<IRepository<User, int>, GenericRepository<User, int, UserDbContext>>();
services.AddTransient<IService, UserService>();
AddMongo(services);
AddMongoRepository<User, int>(services, "users");
}
private static IServiceCollection AddMongo(IServiceCollection services)
{
BsonSerializer.RegisterSerializer(new GuidSerializer(BsonType.String));
BsonSerializer.RegisterSerializer(new DateTimeOffsetSerializer(BsonType.String));
services.AddSingleton(serviceProvider =>
{
var configuration = serviceProvider.GetService<IConfiguration>();
var serviceSettings = configuration.GetSection(nameof(ServiceSettings)).Get<ServiceSettings>();
var mongoDbSettings = configuration.GetSection(nameof(MongoDbSettings)).Get<MongoDbSettings>();
var mongoClient = new MongoClient(mongoDbSettings.ConenctionString);
return mongoClient.GetDatabase(serviceSettings.ServiceName);
});
return services;
}
private static IServiceCollection AddMongoRepository<T, TID>(IServiceCollection services, string collectionName) where T : IEntity<TID>
{
services.AddSingleton<IRepository<User, int>>(serviceProvider =>
{
var db = serviceProvider.GetService<IMongoDatabase>();
return new MongoRepository<User, int>(db, "collectionname");
});
return services;
}
}
}在business层加了aop,通过proxy的方式
using Castle.DynamicProxy;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
namespace Project.Base.Reflect
{
public static class ServiceExtension
{
private static readonly ProxyGenerator _generator = new ProxyGenerator();
public static IServiceCollection AddBusinessServices(this IServiceCollection services)
{
var folder = Path.Combine(Directory.GetCurrentDirectory(), "bus_lib");
var dllFiles = Directory.GetFiles(folder, "*.Business.dll");
var assemblies = dllFiles.Select(Assembly.LoadFrom).ToArray();
var businessTypes = assemblies.SelectMany(a => a.GetTypes().Where(t => t.IsClass&&!t.IsAbstract)).Where(type => type.GetInterfaces().Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IBusiness<>))).ToList();
CastleInterceptor castleInterceptor = new CastleInterceptor();
foreach (var type in businessTypes)
{
var interfaceType = type.GetInterfaces().First(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IBusiness<>));
services.AddTransient(interfaceType, provider =>
{
var target = ActivatorUtilities.CreateInstance(provider, type);
return _generator.CreateInterfaceProxyWithTarget(interfaceType, target, castleInterceptor);
});
}
return services;
}
}
}在你需要的每个方法前加上特性就可以了
using Project.Base.Model;
using Project.Base.ProjAttribute;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ADM001_User.Business
{
/// <summary>
/// 有需要就实现前后动作
/// </summary>
public class AddAop: BaseAopAttribute
{
public override Task After(BusinessAopContext aopContext)
{
return Task.CompletedTask;
}
public override Task Before(BusinessAopContext aopContext)
{
return Task.CompletedTask;
}
}
}再控制器层加了个公共的，不管是controller拦截还是公共的部分都可以写到这里
[Route("api/[controller]/[action]")]
[ApiController]
public class InitController<TModel>:ControllerBase
{
protected readonly ILogger<InitController<TModel>> _logger;
public InitController(ILogger<InitController<TModel>> logger)
{
_logger = logger;
}
}该框架主打就是一个简陋，像日志，缓存 ，消息中间件都可以提前约定好公共接口，service层接口调用，business层注入需要的实现。按照接口和实现分离的方式该项目还需要调整下目录
地址如下: