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ABP vNext微服务架构详细教程(补充篇)——单层模板

1. 简介

在之前的《ABP vNext微服务架构详细教程》系列中,我们已经构建了完整的微服务架构实例,但是在开发过程中,我们会发现每个基础服务都包含10个类库,这是给予DDD四层架构下ABP的实现方案,但是实际使用中我们会发现,随着微服务的增多,类库数量的确太过庞大了。而当时受到ABP vNext版本的限制,并没有一个快速生成精简应用框架的方式。

到了ABP vNext 5.3版本之后,官方添加了新的模板——单层应用模板,用于解决微服务架构单个项目类库过多的问题,也给了我们可以快速构建精简的微服务项目的入口。

这一篇,我就基于单层应用模板,对《ABP vNext微服务架构详细教程》系列原有微服务框架基础上进行简化,在ABP vNext单层模板上进一步精简的同时,提出一套在微服务架构下单层应用的最佳实践方案。

在此篇末尾,我会提供给大家一个精简版项目的代码生成器,请一定阅读到最后。

2. 架构介绍

在之前的文章编写时ABP vNext版本为5.1.1,只有5.3.0之后版本才支持单页应用,目前最新正式版版本为5.3.4,这里我们单层模板以5.3.4版本为例。

通过ABP CLI命令,我们可以创建一个简单的单层应用模板项目。这里的单层是针对类库来说的,也就是只有一层类库,但是类库内部依旧包含着DDD下所有的元素,只是按文件夹划分并且没有明确的分层界限。
到当前版本为止,ABP通过官方CLI命令创建的项目,是必须包含用户角色权限信息管理和身份认证服务的项目。可以理解为过去应用模板的单层形式,但实际在微服务架构下,我们需要进行进一步的调整。

对于整个微服务项目的总体架构和服务分层,我们依旧沿用之前《ABP vNext微服务架构详细教程》中的设计,详见:https://mp.weixin.qq.com/s/uDGwxbEhBv15RdMlflb7LA

在聚合服务层和基础服务层业务服务中,我们使用单层模板为基础构建我们的服务。包含以下内容:

  • 主服务:WebAPI启动项,也是ABP单层模板下生成的项目,包含过去Domain、Application、EntityFramworkCore、HttpApi、HttpApi.Host项目的内容,
  • 契约层:当我们在聚合服务层依赖基础服务层时,我们肯定只是希望依赖基础服务中接口声明而非实现,所以将过去项目中的Application.Contracts和Domain.Shared两个类库中的内容从单层模板主项目抽离出来就是一个必须的工作。在这里,我们将其放在契约层中
  • 动态客户端代理:在之前的基础服务中,包含一个特殊的类库:HttpApi.Client。它是对基础服务层动态客户端代理的封装和配置,它依赖于Application.Contracts项目,在当前服务中,我们依旧希望把它单独保留下来,以便于聚合服务实现HTTP调用。

这里,基础服务层需要包含以上三个项目,而聚合服务层目前没有提供动态客户端代理的需求,所以可以只包含主服务和契约层。(虽然从技术角度聚合服务中契约层也不是必须单独拿出来,但是从架构一致性和扩展性角度,我依旧推荐将契约单独存放)。

聚合服务层和基础服务层业务服务依赖关系如下图:

在整个微服务架构中,身份管理基础服务比较特殊,由于我们的授权中心依赖身份管理服务的EntityFrameworkCore,如果采用单层架构,则发现EntityFrameworkCore项目必须独立出来,而EntityFrameworkCore依赖于Domain层,则Domain层也需要独立,此时我们发现这个项目已经违背了单层应用的初衷。所以身份管理的基础服务我们依旧采用之前的方式来构建。

另外身份认证服务和网关本身就是单类库项目,也不需要做调整。

3. 框架搭建

3.1 基础服务

基础服务我们命名为NotificationManager,通过以下ABP CLI命令,我们可以构建基础服务的主服务,这里我们选择无UI模板,MySQL数据库

abp new Demo.NotificationManager -t app-nolayers -u none -dbms mysql

 将该服务添加至主解决方案service/notificationmanger解决方案文件夹下,并在同目录下分别创建契约层类库 Demo.NotificationManager.Contracts 和动态客户端代理类库 Demo.NotificationManager.Client 。创建后结果如下图:

由于我们没有使用多语言,所以直接将主项目中Localization文件夹所有内容删除。

这里我打算使用另一种对象映射框架,所以删除主项目中的ObjectMapping文件夹,如果准备继续使用AutoMapper框架则保留该文件夹。

移除主项目中Services文件夹中的Dtos子文件夹,DTO不存放在该项目中而是在契约层。

由于我们这边不涉及前端,所以删除wwwroot文件夹和package.json文件。

删除主服务Data文件夹下的IdentityServerDataSeedContributor.cs文件。

删除后主服务项目结构如下:

编辑主项目的Demo.NotificationManager.csproj文件,删除从  <ItemGroup> <PackageReference Include="Volo.Abp.Account.Application" Version="5.3.4" />  到  <PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="6.0.5" /> </ItemGroup> 的所有引用及AutoMapper引用,保留如下内容:

<Project Sdk="Microsoft.NET.Sdk.Web">

<PropertyGroup>
<TargetFramework>net6.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<GenerateEmbeddedFilesManifest>true</GenerateEmbeddedFilesManifest>
</PropertyGroup>

<ItemGroup>
<PackageReference Include="Serilog.AspNetCore" Version="5.0.0" />
<PackageReference Include="Serilog.Sinks.Async" Version="1.5.0" />
</ItemGroup>

<ItemGroup>
<PackageReference Include="Volo.Abp.AspNetCore.Mvc" Version="5.3.4" />
<PackageReference Include="Volo.Abp.Autofac" Version="5.3.4" />
<PackageReference Include="Volo.Abp.Swashbuckle" Version="5.3.4" />
<PackageReference Include="Volo.Abp.AspNetCore.Authentication.JwtBearer" Version="5.3.4" />
<PackageReference Include="Volo.Abp.AspNetCore.Serilog" Version="5.3.4" />
<PackageReference Include="Volo.Abp.EntityFrameworkCore.MySQL" Version="5.3.4" />
</ItemGroup>

<ItemGroup>
<PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="6.0.5" />
</ItemGroup>

<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="6.0.5">
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
<PrivateAssets>compile; contentFiles; build; buildMultitargeting; buildTransitive; analyzers; native</PrivateAssets>
</PackageReference>
</ItemGroup>

<ItemGroup>
<Compile Remove="Logs\**" />
<Content Remove="Logs\**" />
<EmbeddedResource Remove="Logs\**" />
<None Remove="Logs\**" />
</ItemGroup>

<ItemGroup>
<ProjectReference Include="..\..\..\common\Demo.Abp.Extension\Demo.Abp.Extension.csproj" />
<ProjectReference Include="..\Demo.NotificationManager.Contracts\Demo.NotificationManager.Contracts.csproj" />
</ItemGroup>
</Project>

删除主服务Data文件夹下NotificationManagerDbContext类中所有报错的行,保留如下内容:

using Demo.NotificationManager.Entities.Notifications;
using Microsoft.EntityFrameworkCore;
using Volo.Abp.EntityFrameworkCore;

namespace Demo.NotificationManager.Data;

public class NotificationManagerDbContext : AbpDbContext<NotificationManagerDbContext>
{    
    public NotificationManagerDbContext(DbContextOptions<NotificationManagerDbContext> options)
        : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
    }
}

修改Data文件夹下NotificationManagerDbMigrationService类改为以下代码(这里因为我们没使用多租户和初始化数据,所以我移除了相关内容):

using System.Diagnostics;
using System.Runtime.InteropServices;
using Microsoft.Extensions.Logging.Abstractions;
using Volo.Abp.Data;
using Volo.Abp.DependencyInjection;
using Volo.Abp.MultiTenancy;

namespace Demo.NotificationManager.Data;

public class NotificationManagerDbMigrationService : ITransientDependency
{
    public ILogger<NotificationManagerDbMigrationService> Logger { get; set; }

    private readonly IDataSeeder _dataSeeder;
    private readonly NotificationManagerEFCoreDbSchemaMigrator _dbSchemaMigrator;
    private readonly ICurrentTenant _currentTenant;

    public NotificationManagerDbMigrationService(
        IDataSeeder dataSeeder,
        NotificationManagerEFCoreDbSchemaMigrator dbSchemaMigrator,
        ICurrentTenant currentTenant)
    {
        _dataSeeder = dataSeeder;
        _dbSchemaMigrator = dbSchemaMigrator;
        _currentTenant = currentTenant;

        Logger = NullLogger<NotificationManagerDbMigrationService>.Instance;
    }

    public async Task MigrateAsync()
    {
        var initialMigrationAdded = AddInitialMigrationIfNotExist();

        if (initialMigrationAdded)
        {
            return;
        }

        Logger.LogInformation("Started database migrations...");

        await MigrateDatabaseSchemaAsync();
        
        Logger.LogInformation("Successfully completed all database migrations.");
        Logger.LogInformation("You can safely end this process...");
    }

    private async Task MigrateDatabaseSchemaAsync()
    {
        await _dbSchemaMigrator.MigrateAsync();
    }
    
    private bool AddInitialMigrationIfNotExist()
    {
        try
        {
            if (!DbMigrationsProjectExists())
            {
                return false;
            }
        }
        catch (Exception)
        {
            return false;
        }

        try
        {
            if (!MigrationsFolderExists())
            {
                AddInitialMigration();
                return true;
            }
            else
            {
                return false;
            }
        }
        catch (Exception e)
        {
            Logger.LogWarning("Couldn't determinate if any migrations exist : " + e.Message);
            return false;
        }
    }

    private bool DbMigrationsProjectExists()
    {
        return Directory.Exists(GetEntityFrameworkCoreProjectFolderPath());
    }

    private bool MigrationsFolderExists()
    {
        var dbMigrationsProjectFolder = GetEntityFrameworkCoreProjectFolderPath();

        return Directory.Exists(Path.Combine(dbMigrationsProjectFolder, "Migrations"));
    }

    private void AddInitialMigration()
    {
        Logger.LogInformation("Creating initial migration...");

        string argumentPrefix;
        string fileName;

        if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX) || RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
        {
            argumentPrefix = "-c";
            fileName = "/bin/bash";
        }
        else
        {
            argumentPrefix = "/C";
            fileName = "cmd.exe";
        }

        var procStartInfo = new ProcessStartInfo(fileName,
            $"{argumentPrefix} \"abp create-migration-and-run-migrator \"{GetEntityFrameworkCoreProjectFolderPath()}\" --nolayers\""
        );

        try
        {
            Process.Start(procStartInfo);
        }
        catch (Exception)
        {
            throw new Exception("Couldn't run ABP CLI...");
        }
    }

    private string GetEntityFrameworkCoreProjectFolderPath()
    {
        var slnDirectoryPath = GetSolutionDirectoryPath();

        if (slnDirectoryPath == null)
        {
            throw new Exception("Solution folder not found!");
        }

        return Path.Combine(slnDirectoryPath, "Demo.NotificationManager");
    }

    private string GetSolutionDirectoryPath()
    {
        var currentDirectory = new DirectoryInfo(Directory.GetCurrentDirectory());

        while (Directory.GetParent(currentDirectory.FullName) != null)
        {
            currentDirectory = Directory.GetParent(currentDirectory.FullName);

            if (Directory.GetFiles(currentDirectory.FullName).FirstOrDefault(f => f.EndsWith(".sln")) != null)
            {
                return currentDirectory.FullName;
            }
        }

        return null;
    }
}

将主服务模块类修改为以下内容:

using Demo.NotificationManager.Contracts;
using Microsoft.OpenApi.Models;
using Demo.NotificationManager.Data;
using Volo.Abp;
using Volo.Abp.AspNetCore.Mvc;
using Volo.Abp.AspNetCore.Serilog;
using Volo.Abp.Autofac;
using Volo.Abp.EntityFrameworkCore;
using Volo.Abp.EntityFrameworkCore.MySQL;
using Volo.Abp.Modularity;
using Volo.Abp.Swashbuckle;

namespace Demo.NotificationManager;

[DependsOn(
// ABP Framework packages
typeof(AbpAspNetCoreMvcModule),
typeof(AbpAutofacModule),
typeof(AbpEntityFrameworkCoreMySQLModule),
typeof(AbpSwashbuckleModule),
typeof(AbpAspNetCoreSerilogModule),
typeof(NotificationManagerContractsModule)
)]
public class NotificationManagerModule : AbpModule
{
#region 私有方法

#region 配置动态webapi
private void ConfigureAutoApiControllers()
{
Configure<AbpAspNetCoreMvcOptions>(options =>
{
options.ConventionalControllers.Create(typeof(NotificationManagerModule).Assembly);
});
}
#endregion

#region 配置swagger
private void ConfigureSwagger(IServiceCollection services)
{
services.AddAbpSwaggerGen(
options =>
{
options.SwaggerDoc("v1", new OpenApiInfo { Title = "NotificationManager API", Version = "v1" });
options.DocInclusionPredicate((_, _) => true);
options.CustomSchemaIds(type => type.FullName);
}
);
}
#endregion

#region 设置EF
private void ConfigureEfCore(ServiceConfigurationContext context)
{
context.Services.AddAbpDbContext<NotificationManagerDbContext>(options =>
{
/* You can remove "includeAllEntities: true" to create
* default repositories only for aggregate roots
* Documentation: https://docs.abp.io/en/abp/latest/Entity-Framework-Core#add-default-repositories
*/
options.AddDefaultRepositories(includeAllEntities: true);
});

Configure<AbpDbContextOptions>(options =>
{
options.Configure(configurationContext =>
{
configurationContext.UseMySQL();
});
});
}
#endregion

#endregion
public override void ConfigureServices(ServiceConfigurationContext context)
{
ConfigureSwagger(context.Services);
ConfigureAutoApiControllers();
ConfigureEfCore(context);
}

public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
app.UseRouting();
app.UseUnitOfWork();
app.UseSwagger();
app.UseSwaggerUI(options =>
{
options.SwaggerEndpoint("/swagger/v1/swagger.json", "NotificationManager API");
});
app.UseAbpSerilogEnrichers();
app.UseConfiguredEndpoints();
}
}

 在主服务中的appsettings.json中删除额外配置项保留如下内容

{
  "ConnectionStrings": {
    "Default": "Server=localhost;Port=3306;Database=NotificationManager;Uid=root;Pwd=123456;"
  },
  "urls": "http://*:5003"
}

删除契约层中的Class1.cs,并添加模块类NotificationManagerContractsModule如下:

using Volo.Abp.Application;
using Volo.Abp.Modularity;

namespace Demo.NotificationManager.Contracts;

[DependsOn(
    typeof(AbpDddApplicationContractsModule)
)]
public class NotificationManagerContractsModule : AbpModule
{

}

在契约层添加NotificationManagerRemoteServiceConsts类如下:

namespace Demo.NotificationManager.Contracts;

public class NotificationManagerRemoteServiceConsts
{
    public const string RemoteServiceName = "NitificationManager";

    public const string ModuleName = "nitificationManager";
}

删除动态客户端代理层的Class1.cs文件,添加模块类NotificationManagerClientModule如下:

using Demo.Abp.Extension;
using Demo.NotificationManager.Contracts;
using Microsoft.Extensions.DependencyInjection;
using Volo.Abp.Http.Client;
using Volo.Abp.Modularity;
using Volo.Abp.Timing;
using Volo.Abp.VirtualFileSystem;

namespace Demo.NotificationManager.Client;

[DependsOn(typeof(NotificationManagerContractsModule),
typeof(AbpHttpClientModule))]

public class NotificationManagerClientModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
context.Services.AddTransient<AddHeaderHandler>();
context.Services.AddHttpClient(NotificationManagerRemoteServiceConsts.RemoteServiceName)
.AddHttpMessageHandler<AddHeaderHandler>();

context.Services.AddHttpClientProxies(
typeof(NotificationManagerContractsModule).Assembly,
NotificationManagerRemoteServiceConsts.RemoteServiceName
);

Configure<AbpVirtualFileSystemOptions>(options =>
{
options.FileSets.AddEmbedded<NotificationManagerClientModule>();
});
Configure<AbpClockOptions>(options => { options.Kind = DateTimeKind.Local; });
}
}

 完成以上修改后,运行项目并用浏览器访问http://localhost:5005,可出现Swagger页面则基础服务配置成功。

3.2 聚合服务

这里我们将聚合服务命名为Domain.Core

和基础服务层一致,我们先通过命令创建单层模板项目Domain.Core,这里我们删除wwwroot、Data、Entities、Localization、ObjectMapping文件夹及其所有子文件,并删除package.json文件和Services文件夹下的Dtos文件夹

在同级目录添加类库Domain.Core.Constracts并删除其中的Class1.cs文件

这里我们在聚合服务中暂时不需要提供动态客户端代理,暂时不创建.Client项目,如果需要,创建方式和基础服务层相同。

修改Demo.Core.csproj文件如下:

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <GenerateEmbeddedFilesManifest>true</GenerateEmbeddedFilesManifest>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Serilog.AspNetCore" Version="5.0.0" />
    <PackageReference Include="Serilog.Sinks.Async" Version="1.5.0" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Volo.Abp.AspNetCore.Mvc" Version="5.3.4" />
    <PackageReference Include="Volo.Abp.Autofac" Version="5.3.4" />
    <PackageReference Include="Volo.Abp.Swashbuckle" Version="5.3.4" />
    <PackageReference Include="Volo.Abp.AspNetCore.Serilog" Version="5.3.4" />
  </ItemGroup>
  
  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="6.0.5" />
  </ItemGroup>

  <ItemGroup>
    <Content Remove="Localization\Core\*.json" />
    <EmbeddedResource Include="Localization\Core\*.json" />
    <EmbeddedResource Remove="wwwroot\**" />
    <Content Remove="wwwroot\**" />
    <Content Remove="package.json" />
  </ItemGroup>

  <ItemGroup>
    <Compile Remove="Logs\**" />
    <Content Remove="Logs\**" />
    <EmbeddedResource Remove="Logs\**" />
    <None Remove="Logs\**" />
    <Compile Remove="wwwroot\**" />
    <None Remove="wwwroot\**" />
  </ItemGroup>
  
  <ItemGroup>
    <ProjectReference Include="..\..\..\service\notificationmanager\Demo.NotificationManager.Client\Demo.NotificationManager.Client.csproj" />
    <ProjectReference Include="..\Demo.Core.Contracts\Demo.Core.Contracts.csproj" />
  </ItemGroup>
</Project>

修改CoreModule.cs类代码如下:

using Demo.Core.Contracts;
using Demo.NotificationManager.Client;
using Microsoft.OpenApi.Models;
using Volo.Abp;
using Volo.Abp.AspNetCore.Mvc;
using Volo.Abp.AspNetCore.Serilog;
using Volo.Abp.Autofac;
using Volo.Abp.Modularity;
using Volo.Abp.Swashbuckle;

namespace Demo.Core;

[DependsOn(
    // ABP Framework packages
    typeof(AbpAspNetCoreMvcModule),
    typeof(AbpAutofacModule),
    typeof(AbpSwashbuckleModule),
    typeof(AbpAspNetCoreSerilogModule),
    typeof(CoreContractsModule),
    typeof(NotificationManagerClientModule)
)]
public class CoreModule : AbpModule
{
    #region 私有方法
    
    #region 配置动态WebApi
    private void ConfigureAutoApiControllers()
    {
        Configure<AbpAspNetCoreMvcOptions>(options =>
        {
            options.ConventionalControllers.Create(typeof(CoreModule).Assembly);
        });
    }
    #endregion

    #region 配置swagger
    private void ConfigureSwagger(IServiceCollection services)
    {
        services.AddAbpSwaggerGen(
            options =>
            {
                options.SwaggerDoc("v1", new OpenApiInfo { Title = "Core API", Version = "v1" });
                options.DocInclusionPredicate((docName, description) => true);
                options.CustomSchemaIds(type => type.FullName);
            }
        );
    }
    #endregion
    
    #endregion
    
    public override void ConfigureServices(ServiceConfigurationContext context)
    {
        ConfigureSwagger(context.Services);
        ConfigureAutoApiControllers();
    }
    
    public override void OnApplicationInitialization(ApplicationInitializationContext context)
    {
        var app = context.GetApplicationBuilder();
        
        app.UseRouting();
        app.UseUnitOfWork();
        app.UseSwagger();
        app.UseSwaggerUI(options =>
        {
            options.SwaggerEndpoint("/swagger/v1/swagger.json", "Core API");
        });
        app.UseAbpSerilogEnrichers();
        app.UseConfiguredEndpoints();
    }
}

修改Program.cs文件内容如下:

using Demo.Core;
using Serilog;
using Serilog.Events;

Log.Logger = new LoggerConfiguration()
#if DEBUG
    .MinimumLevel.Debug()
#else
                .MinimumLevel.Information()
#endif
    .MinimumLevel.Override("Microsoft", LogEventLevel.Information)
    .Enrich.FromLogContext()
    .WriteTo.Async(c => c.File("Logs/logs.txt"))
#if DEBUG
    .WriteTo.Async(c => c.Console())
#endif
    .CreateLogger();

var builder = WebApplication.CreateBuilder(args);

builder.Host.UseAutofac().UseSerilog();

builder.Services.ReplaceConfiguration(builder.Configuration);

builder.Services.AddApplication<CoreModule>();

var app = builder.Build();

app.InitializeApplication();

app.Run();

修改appsettings.json文件如下:

{
  "urls": "http://*:6003",
  "RemoteServices": {
    "NitificationManager": {
      "BaseUrl": "http://localhost:5003/"
    }
  }
}

修改Demo.Core.Contracts.csproj文件:

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <TargetFramework>net6.0</TargetFramework>
        <ImplicitUsings>enable</ImplicitUsings>
        <Nullable>enable</Nullable>
    </PropertyGroup>
    
    <ItemGroup>
        <PackageReference Include="Volo.Abp.Ddd.Application.Contracts" Version="5.3.4" />
    </ItemGroup>
</Project>

在Demo.Core.Contracts项目中创建CoreContractsModule.cs文件内容如下:

using Volo.Abp.Application;
using Volo.Abp.Modularity;

namespace Demo.Core.Contracts;

[DependsOn(
    typeof(AbpDddApplicationContractsModule)
)]
public class CoreContractsModule : AbpModule
{

}

启动Demo.Core项目可正常运行并显示swagger页面则聚合服务创建成功。

4.业务代码

4.1 基础服务

在Demo.NotificationManager项目Entities文件夹中按领域划分子文件夹,这里创建Notifications领域文件夹,并添加实体类Notification如下:

using System.ComponentModel.DataAnnotations;
using Volo.Abp.Domain.Entities.Auditing;

namespace Demo.NotificationManager.Entities.Notifications;

/// <summary>
/// 通知
/// </summary>
public class Notification : CreationAuditedEntity<Guid>
{
    /// <summary>
    /// 接受着用户ID
    /// </summary>
    public Guid ReceiverId { get; set; }

    /// <summary>
    /// 标题
    /// </summary>
    [StringLength(128)]
    public string Title { get; set; }
    
    /// <summary>
    /// 内容
    /// </summary>
    public string Content { get; set; }

    /// <summary>
    /// 是否已读
    /// </summary>
    public bool IsRead { get; set; }
}

在Demo.NotificationManager项目Data文件夹下的NotificationManagerDbContext类中添加如下属性并引入相应依赖:

public DbSet<Notification> Notifications { get; set; }

通过 dotnet-ef 的 migrations add 命令和 database update 命令创建数据库结构。

这里我们未用到领域服务,如果需要,可在Demo.NotificationManager项目中添加Managers文件夹并按领域存放对应代码。

在Demo.NotificationManager.Contracts项目中添加Services文件夹,DTO和应用服务接口的定义。这里添加子文件夹Notifications并在其中添加Dtos文件夹,用于存放DTO。

我们添加以下两个DTO分别用于添加和查询通知:

using System.ComponentModel.DataAnnotations;
using Volo.Abp.Application.Dtos;

namespace Demo.NotificationManager.Contracts.Services.Notifications.Dtos;

public class NotificationCreateDto:EntityDto<Guid>
{
    /// <summary>
    /// 接受着用户ID
    /// </summary>
    public Guid ReceiverId { get; set; }

    /// <summary>
    /// 标题
    /// </summary>
    [StringLength(128)]
    public string Title { get; set; }
    
    /// <summary>
    /// 内容
    /// </summary>
    public string Content { get; set; }

    /// <summary>
    /// 是否已读
    /// </summary>
    public bool IsRead { get; set; }
}
using System.ComponentModel.DataAnnotations;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Auditing;

namespace Demo.NotificationManager.Contracts.Services.Notifications.Dtos;

public class NotificationDto:NotificationCreateDto,ICreationAuditedObject
{
    /// <summary>
    /// 创建时间
    /// </summary>
    public DateTime CreationTime { get; set; }
    
    /// <summary>
    /// 创建者
    /// </summary>
    public Guid? CreatorId { get; set; }
}

添加INotificationAppService应用服务接口,内容如下:

using Demo.NotificationManager.Contracts.Services.Notifications.Dtos;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;

namespace Demo.NotificationManager.Contracts.Services.Notifications;

public interface
    INotificationAppService : ICrudAppService<NotificationDto, Guid, PagedResultRequestDto, NotificationCreateDto>
{

}

在Demo.NotificationManger中Services文件夹中添加应用服务实现类,这里添加Notifications子文件夹并创建NotificationAppService类如下:

using Demo.Abp.Extension;
using Demo.NotificationManager.Contracts.Services.Notifications;
using Demo.NotificationManager.Contracts.Services.Notifications.Dtos;
using Demo.NotificationManager.Entities.Notifications;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Domain.Repositories;

namespace Demo.NotificationManager.Services.Notifications;

public class NotificationAppService : CustomCrudAppService<Notification, NotificationDto, Guid,PagedResultRequestDto,NotificationCreateDto>, INotificationAppService
{
    public NotificationAppService(IRepository<Notification, Guid> repository) : base(repository)
    {
    }
}

此处,我引入了Mapster框架替代原来的AutoMapper框架,所以我们看到CustomCrudAppService类替代了默认增删改查类CrudAppService。

CrudAppService类被存放在Demo.Abp.Extension类库中作为通用基类使用,代码如下:

using Mapster;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;
using Volo.Abp.Domain.Entities;
using Volo.Abp.Domain.Repositories;

namespace Demo.Abp.Extension;

#region 重载
public abstract class CustomCrudAppService<TEntity, TEntityDto, TKey>
    : CustomCrudAppService<TEntity, TEntityDto, TKey, PagedAndSortedResultRequestDto>
    where TEntity : class, IEntity<TKey>
    where TEntityDto : IEntityDto<TKey>
{
    protected CustomCrudAppService(IRepository<TEntity, TKey> repository)
        : base(repository)
    {

    }
}

public abstract class CustomCrudAppService<TEntity, TEntityDto, TKey, TGetListInput>
    : CustomCrudAppService<TEntity, TEntityDto, TKey, TGetListInput, TEntityDto>
    where TEntity : class, IEntity<TKey>
    where TEntityDto : IEntityDto<TKey>
{
    protected CustomCrudAppService(IRepository<TEntity, TKey> repository)
        : base(repository)
    {

    }
}

public abstract class CustomCrudAppService<TEntity, TEntityDto, TKey, TGetListInput, TCreateInput>
    : CustomCrudAppService<TEntity, TEntityDto, TKey, TGetListInput, TCreateInput, TCreateInput>
    where TEntity : class, IEntity<TKey>
    where TEntityDto : IEntityDto<TKey>
{
    protected CustomCrudAppService(IRepository<TEntity, TKey> repository)
        : base(repository)
    {

    }
}

public abstract class CustomCrudAppService<TEntity, TEntityDto, TKey, TGetListInput, TCreateInput, TUpdateInput>
    : CustomCrudAppService<TEntity, TEntityDto, TEntityDto, TKey, TGetListInput, TCreateInput, TUpdateInput>
    where TEntity : class, IEntity<TKey>
    where TEntityDto : IEntityDto<TKey>
{
    protected CustomCrudAppService(IRepository<TEntity, TKey> repository)
        : base(repository)
    {

    }

    protected override Task<TEntityDto> MapToGetListOutputDtoAsync(TEntity entity)
    {
        return MapToGetOutputDtoAsync(entity);
    }

    protected override TEntityDto MapToGetListOutputDto(TEntity entity)
    {
        return MapToGetOutputDto(entity);
    }
}
#endregion


public class CustomCrudAppService<TEntity, TGetOutputDto, TGetListOutputDto, TKey, TGetListInput, TCreateInput,
        TUpdateInput>
    : CrudAppService<TEntity, TGetOutputDto, TGetListOutputDto, TKey, TGetListInput, TCreateInput, TUpdateInput>
    where TEntity : class, IEntity<TKey>
    where TGetOutputDto : IEntityDto<TKey>
    where TGetListOutputDto : IEntityDto<TKey>
{
    public CustomCrudAppService(IRepository<TEntity, TKey> repository) : base(repository)
    {
    }
    
    #region Mapster
    protected override TEntity MapToEntity(TCreateInput createInput)
    {
        var entity = createInput.Adapt<TEntity>();
        SetIdForGuids(entity);
        return entity;
    }

    protected override void MapToEntity(TUpdateInput updateInput, TEntity entity)
    {
        if (updateInput is IEntityDto<TKey> entityDto)
        {
            entityDto.Id = entity.Id;
        }
        entity = updateInput.Adapt(entity);
    }

    protected override TGetOutputDto MapToGetOutputDto(TEntity entity)
    {
        return entity.Adapt<TGetOutputDto>(); //ObjectMapper.Map<TEntity, TGetOutputDto>(entity);
    }
    protected override TGetListOutputDto MapToGetListOutputDto(TEntity entity)
    {
        return entity.Adapt<TGetListOutputDto>(); //ObjectMapper.Map<TEntity, TGetListOutputDto>(entity);
    }
    #endregion
}

此类我继承自原有的CrudAppService类,并重写了对象转换方法。

使用Mapster,比AutoMapper效率更高,而且不需要提前声明默认的对象映射关系,如果需要额外定义映射关系或操作,可通过添加MapConfig类实现。具体用法参考其官方文档:https://github.com/rivenfx/Mapster-docs

如果我们需要定义领域通用配置、枚举等原属于Domain.Share项目中的内容,可创建并存放在Demo.NotificationManager.Contracts项目下Share文件夹中。

完成以上步骤,并可成功运行Demo.NotificationManager项目,则基础服务代码运行成功。

4.2 聚合服务

聚合服务层和基础服务层相同的道理,在Demo.Core.Contracts增加Services文件夹,并添加Notifications子文件夹,在其中添加Dtos文件夹并添加两个DTO与基础服务对应:

using Volo.Abp.Application.Dtos;

namespace Demo.Core.Contracts.Services.Notifications.Dtos;

public class CoreNotificationCreateDto:EntityDto<Guid>
{
    /// <summary>
    /// 接受着用户ID
    /// </summary>
    public Guid ReceiverId { get; set; }

    /// <summary>
    /// 标题
    /// </summary>
    public string Title { get; set; }

    /// <summary>
    /// 内容
    /// </summary>
    public string Content { get; set; }

    /// <summary>
    /// 是否已读
    /// </summary>
    public bool IsRead { get; set; }
}
using Volo.Abp.Auditing;

namespace Demo.Core.Contracts.Services.Notifications.Dtos;

public class CoreNotificationDto : CoreNotificationCreateDto,ICreationAuditedObject
{
    /// <summary>
    /// 创建时间
    /// </summary>
    public DateTime CreationTime { get; set; }
    
    /// <summary>
    /// 创建人
    /// </summary>
    public Guid? CreatorId { get; set; }
}

在Demo.Core.Contracts项目中Services/Notifications下添加接口ICoreNotificationAppService如下:

using Demo.Core.Contracts.Services.Notifications.Dtos;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;

namespace Demo.Core.Contracts.Services.Notifications;

public interface ICoreNotificationAppService:IApplicationService
{
    Task<PagedResultDto<CoreNotificationDto>> GetAllAsync(PagedAndSortedResultRequestDto request);

    Task<bool> CreatAsync(CoreNotificationCreateDto request);
}

在Demo.Core项目中的Services下创建Notifications文件夹并添加实现类CoreNotificationAppService:

using Demo.Core.Contracts.Services.Notifications;
using Demo.Core.Contracts.Services.Notifications.Dtos;
using Demo.NotificationManager.Contracts.Services.Notifications;
using Demo.NotificationManager.Contracts.Services.Notifications.Dtos;
using Mapster;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;

namespace Demo.Core.Services.Notifications;

public class CoreNotificationAppService:ApplicationService,ICoreNotificationAppService
{
    private readonly INotificationAppService _notificationAppService;

    public CoreNotificationAppService(INotificationAppService notificationAppService)
    {
        _notificationAppService = notificationAppService;
    }

    public async Task<PagedResultDto<CoreNotificationDto>> GetAllAsync(PagedAndSortedResultRequestDto request)
    {
        var ret = await _notificationAppService.GetListAsync(request);
        return new PagedResultDto<CoreNotificationDto>(ret.TotalCount, ret.Items.Adapt<List<CoreNotificationDto>>());
    }

    public async Task<bool> CreatAsync(CoreNotificationCreateDto request)
    {
        var notification = request.Adapt<NotificationDto>();
        await _notificationAppService.CreateAsync(notification);
        return true;
    }
}

修改Demo.Core项目appsettings.json文件如下:

{
  "urls": "http://*:6003",
  "RemoteServices": {
    "NitificationManager": {
      "BaseUrl": "http://localhost:5003/"
    }
  }
}

到这里,我们最基础的一个聚合层服务和基础层服务都创建完毕。

5. 补充说明

如果我们使用的是单一服务或者没有使用聚合层,可以只使用基础服务的用法。

如果想继续使用AutoMapper框架作为实体映射,可在创建项目时保留AutoMapper相关内容。

这篇文章中我们完成了删减的过程,依据我们的需要,我们再增加所需要的缓存、鉴权、当前用户传递等代码,具体可参见《ABP vNext微服务架构详细教程》系列完整文章。

为大家创建单层应用方便,我将编写一个单层模板项目代码生成器,上传至https://gitee.com/lightnehum/abp-single-layer-builder,请大家关注并使用。

posted on 2022-09-25 16:28  车神ne  阅读(756)  评论(0编辑  收藏  举报