MasaFramework 入门第三篇，使用MasaFramework

首先我们需要创建一个MasaFramework模板的项目，项目名称TokenDemo，项目类型如图所示

删除Web/TokenDemo.Admin项目，新建Masa Blazor Pro项目模板

项目，项目位置在src/Web项目

项目类型选择ServerAndWasm，为了让我们支持俩种模式

创建完成以后的目录，然后在TokenDemo.Admin中添加项目引用TokenDemo.Caller

配置EntityFrameworkCore和Sqlite

修改TokenDemo.Service项目的包依赖为预览版

 <ItemGroup>
<PackageReference Include="Masa.BuildingBlocks.Dispatcher.Events" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Data.Contracts" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Data.EFCore.Sqlite" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Dispatcher.Events" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Dispatcher.IntegrationEvents.EventLogs.EFCore" Version="1.0.0-preview.18" />
<PackageReference Include="FluentValidation" Version="11.5.1" />
<PackageReference Include="FluentValidation.AspNetCore" Version="11.2.2" />
<PackageReference Include="Masa.Utils.Extensions.DependencyInjection" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Service.MinimalAPIs" Version="1.0.0-preview.18" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="6.0.3" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
</ItemGroup>

Masa.Contrib.Data.Contracts提供了数据过滤^[1]的能力, 但它不是必须的

然后会出现报错

LogMiddleware将代码修改为以下代码

namespace TokenDemo.Service.Infrastructure.Middleware;

public class LogMiddleware<TEvent> : EventMiddleware<TEvent>
where TEvent : not, IEvent
{
private readonly ILogger<LogMiddleware<TEvent>> _logger;

public LogMiddleware(ILogger<LogMiddleware<TEvent>> logger)
 {
 _logger = logger;
 }

public override async Task HandleAsync(TEvent action, EventHandlerDelegate next)
 {
var typeName = action.GetType().FullName;

 _logger.LogInformation("----- command {CommandType}", typeName);

await next();
 }
}

ValidatorMiddleware将代码修改为以下代码

namespace TokenDemo.Service.Infrastructure.Middleware;

public class ValidatorMiddleware<TEvent> : EventMiddleware<TEvent>
where TEvent : not, IEvent
{
private readonly ILogger<ValidatorMiddleware<TEvent>> _logger;
private readonly IEnumerable<IValidator<TEvent>> _validators;

public ValidatorMiddleware(IEnumerable<IValidator<TEvent>> validators, ILogger<ValidatorMiddleware<TEvent>> logger)
 {
 _validators = validators;
 _logger = logger;
 }

public override async Task HandleAsync(TEvent action, EventHandlerDelegate next)
 {
var typeName = action.GetType().FullName;

 _logger.LogInformation("----- Validating command {CommandType}", typeName);

var failures = _validators
 .Select(v => v.Validate(action))
 .SelectMany(result => result.Errors)
 .Where(error => error != )
 .ToList();

if (failures.Any())
 {
 _logger.LogWarning("Validation errors - {CommandType} - Command: {@Command} - Errors: {@ValidationErrors}", typeName, action, failures);

throw new ValidationException("Validation exception", failures);
 }

await next();
 }
}

OrderEventHandler将代码修改为以下代码

namespace TokenDemo.Service.Infrastructure.Handlers;

public class OrderEventHandler
{
readonly IOrderRepository _orderRepository;

public OrderEventHandler(IOrderRepository orderRepository)
 {
 _orderRepository = orderRepository;
 }

 [EventHandler(Order = 1)]
public async Task HandleAsync(QueryOrderListEvent @event)
 {
 @event.Orders = await _orderRepository.GetListAsync();
 }
}

public class OrderEventAfterHandler : IEventHandler<QueryOrderListEvent>
{
public async Task HandleAsync(QueryOrderListEvent @event, CancellationToken cancellationToken = new CancellationToken())
 {
await Task.CompletedTask;
 }
}

修改appsettings.json 添加Sqlite地址

{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
 }
 },
"AllowedHosts": "*",
"ConnectionStrings": {
"DefaultConnection": "Data Source=Catalog.db;"
 }
}

修改Program.cs代码

using TokenDemo.Service.Infrastructure;

var builder = WebApplication.CreateBuilder(args);

builder.Services
 .AddAuthorization()
 .AddAuthentication(options =>
 {
 options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
 options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
 })
 .AddJwtBearer(options =>
 {
 options.Authority = "";
 options.RequireHttpsMetadata = false;
 options.Audience = "";
 });

builder.Services.AddMasaDbContext<ShopDbContext>(dbContextBuilder =>
{
 dbContextBuilder
 .UseSqlite() //使用Sqlite数据库
 .UseFilter(); //数据数据过滤
});

builder.Services.AddAutoInject();
var app = builder.Services
 .AddEndpointsApiExplorer()
 .AddSwaggerGen(options =>
 {
 options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme()
 {
 Name = "Authorization",
 Type = SecuritySchemeType.ApiKey,
 Scheme = "Bearer",
 BearerFormat = "JWT",
 In = ParameterLocation.Header,
 Description = "JWT Authorization header using the Bearer scheme. \r\n\r\n Enter 'Bearer' [space] and then your token in the text input below.\r\n\r\nExample: \"Bearer xxxxxxxxxxxxxxx\"",
 });
 options.AddSecurityRequirement(new OpenApiSecurityRequirement
 {
 {
new OpenApiSecurityScheme
 {
 Reference = new OpenApiReference
 {
 Type = ReferenceType.SecurityScheme,
 Id = "Bearer"
 }
 },
new string[] {}
 }
 });
 })
 .AddFluentValidationAutoValidation().AddFluentValidationClientsideAdapters()
 .AddEventBus(eventBusBuilder =>
 {
 eventBusBuilder.UseMiddleware(typeof(ValidatorMiddleware<>));
 eventBusBuilder.UseMiddleware(typeof(LogMiddleware<>));
 })
 .AddServices(builder);

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
 app.UseSwagger();
 app.UseSwaggerUI();
}
app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();

app.UseHttpsRedirection();

app.Run();

添加EFCore迁移依赖

 <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.15">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="6.0.15">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>

在程序包管理器控制台中输入 Add-Migration Init生成Init的迁移文件（如果出现 error NETSDK1082: Microsoft.AspNetCore.App 没有运行时包可用于指定的 RuntimeIdentifier“browser-wasm”这个错误的话就先把TokenDemo.Admin.WebAssembly项目移除）

使用Update-Database生成Sqlitem

然后就可以看到项目中生成了Catalog.db文件

启动TokenDemo.Service.Order我们就可以看到Swagger的界面了

如何对接接口

打开TokenDemo.Caller项目中的``Callers\OrderCaller.cs`文件

修改BaseAdderss为TokenDemo.Service.Order的服务地址

打开TokenDemo.Service.Order项目的Services\OrderService.cs文件并且修改代码

namespace TokenDemo.Service.Services;

public class OrderService : ServiceBase
{
public OrderService(IServiceCollection services) : base(services)
 {
 App.MapGet("/order/list", QueryList).Produces<List<Infrastructure.Entities.Order>>()
 .WithName("GetOrders");
 }

public async Task<IResult> QueryList(IEventBus eventBus)
 {
var orderQueryEvent = new QueryOrderListEvent();
await eventBus.PublishAsync(orderQueryEvent);
return Results.Ok(orderQueryEvent.Orders);
 }
}

然后在通过命令行启动TokenDemo.Service.Order项目

打开TokenDemo\Admin项目的Pages\Home\Index.razor文件并且修改代码

@page "/"
@using TokenDemo.Caller.Callers
@inherits LayoutComponentBase
@inject NavigationManager Nav
@inject OrderCaller OrderCaller
@code {

protected override async Task OnAfterRenderAsync(bool firstRender)
 {
 Nav.NavigateTo(GlobalVariables.DefaultRoute,true);
var data = await OrderCaller.GetListAsync();
await base.OnAfterRenderAsync(firstRender);
 }

}

并且在await base.OnAfterRenderAsync(firstRender);这里打一个断点用于查看是否获取到消息

打开TokenDemo.Admin.Server项目的Program.cs，添加以下代码

builder.Services.AddCaller(typeof(TokenDemo.Caller.Callers.OrderCaller).Assembly);

然后启动TokenDemo.Admin.Server项目，进入断点

得到结果

结尾

通过上文我们可以基本将MasaFramework的使用掌握，前端和后端的接口也掌握了

当前是MasaFramework的第三篇入门，我会继续学习MasaFramework并且分享给大家

来自token的分享

MASA Framework^[2]

学习交流：737776595

参考资料