【ABP框架系列学习】模块系统(4)之插件示例开发

0.引言

上一篇博文主要介绍了ABP模块及插件的相关知识，本章节主要开发一个插件示例来学习如何创建一个插件，并在应用程序中使用。这个命名为FirstABPPlugin的插件主要在指定的时间段内删除审计日志。

1.创建插件

(1).新建项目，选择【类库(.NET Core)】

(2).添加引用Abp、Abp.ZeroCore

(3).创建FirstABPPluginModule类，继承AbpModule类和声明依赖于AbpZeroCoreModule

    [DependsOn(typeof(AbpZeroCoreModule))]
    public class FirstABPPluginModule:AbpModule
    {
        public override void Initialize()
        {
            IocManager.RegisterAssemblyByConvention(Assembly.GetExecutingAssembly());
        }

        public override void PostInitialize()
        {
            var workManager = IocManager.Resolve();
            workManager.Add(IocManager.Resolve(DeleteOldAuditLogsWorker());
        }
    }

(4).添加DeleteOldAuditLogsWorker类

 public class DeleteOldAuditLogsWorker : PeriodicBackgroundWorkerBase, ISingletonDependency
    {
        private readonly IRepository _auditLogRepository;

        public DeleteOldAuditLogsWorker(AbpTimer timer,IRepository auditLogRepository) : base(timer)
        {
            _auditLogRepository = auditLogRepository;

            Timer.Period = 5000;
        }

        [UnitOfWork]
        protected override void DoWork()
        {
            Logger.Info("---------------- DeleteOldAuditLogsWorker 正在工作 ----------------");

            using (CurrentUnitOfWork.DisableFilter(AbpDataFilters.MayHaveTenant))
            {
                var fiveMinutesAgo = Clock.Now.Subtract(TimeSpan.FromMinutes(5));

                _auditLogRepository.Delete(log => log.ExecutionTime > fiveMinutesAgo);

                CurrentUnitOfWork.SaveChanges();
            }
        }
    }

(5).最终结构如下

(6).生成项目，在bin/Debug/netcoreapp2.1目录下生成FirstABPPlugin.dll

2.添加插件到应用程序

(1).启动ABP项目模版生成的程序，把刚生成的FirstABPPlugin.dll拷贝到wwwroot/Plugins目录下

(2).在Mvc项目的Startup.cs类中，添加如下代码：

public class Startup
{
    private readonly IConfigurationRoot _appConfiguration;

    public Startup(IHostingEnvironment env)
    {
        _appConfiguration = env.GetAppConfiguration();
    }

    public IServiceProvider ConfigureServices(IServiceCollection services)
    {
        ...

        // Configure Abp and Dependency Injection
        return services.AddAbp(
            // Configure Log4Net logging
            options => options.IocManager.IocContainer.AddFacility(
                f => f.UseAbpLog4Net().WithConfig("log4net.config")
            );

            options.PlugInSources.AddFolder(Path.Combine(_hostingEnvironment.WebRootPath, "Plugins"), SearchOption.AllDirectories);
        );
    }

    ...
}

(3)运行程序，查看Logs.txt日志记录