[TOC]
什么是Module？
Module就是模块化的设计思想。开发人员可以将自定义的功能以模块的形式集成到项目中。具体的功能也可以设计成一个单独的模块
AbpModule
AbpModule是所有Module的基类。
ABP如何发现Moudle
1. 程序入口调用：AbpBootstrapper.Initialize()
2. 通过入口的Moudle获取到所有互相依赖的Moudle
private static void AddModuleAndDependenciesRecursively(List<Type> modules, Type module)
{
if (!IsAbpModule(module))
{
throw new AbpInitializationException("This type is not an ABP module: " + module.AssemblyQualifiedName);
}
if (modules.Contains(module))
{
return;
}
modules.Add(module);
var dependedModules = FindDependedModuleTypes(module);
foreach (var dependedModule in dependedModules)
{
AddModuleAndDependenciesRecursively(modules, dependedModule);
}
}
/// <summary>
/// Finds direct depended modules of a module (excluding given module).
/// </summary>
public static List<Type> FindDependedModuleTypes(Type moduleType)
{
if (!IsAbpModule(moduleType))
{
throw new AbpInitializationException("This type is not an ABP module: " + moduleType.AssemblyQualifiedName);
}
var list = new List<Type>();
if (moduleType.GetTypeInfo().IsDefined(typeof(DependsOnAttribute), true))
{
var dependsOnAttributes = moduleType.GetTypeInfo().GetCustomAttributes(typeof(DependsOnAttribute), true).Cast<DependsOnAttribute>();
foreach (var dependsOnAttribute in dependsOnAttributes)
{
foreach (var dependedModuleType in dependsOnAttribute.DependedModuleTypes)
{
list.Add(dependedModuleType);
}
}
}
return list;
}3. 注册所有Moudle
RegisterModules(moduleTypes);4. 创建所有Module的描述信息
CreateModules(moduleTypes, plugInModuleTypes);- AbpModule的基本信息放在AbpModuleInfo类中
- 多个AbpModuleInfo放在AbpModuleCollection集合中
5. 初始化所有Moudle
public virtual void StartModules()
{
var sortedModules = _modules.GetSortedModuleListByDependency();
sortedModules.ForEach(module => module.Instance.PreInitialize());
sortedModules.ForEach(module => module.Instance.Initialize());
sortedModules.ForEach(module => module.Instance.PostInitialize());
}由于模块有依赖关系存在，所以初始化之前确定好初始化顺序，即：被依赖的模块要在依赖的模块之前初始化
至此所有Moudle都被Abp框架集成了
如何把自己Moudle中的类和接口注册到abp框架中
比如AbpWebMvcModule这个模块，就是如何把Controller注册到Abp框架中
每个模块都有PreInitialize 和 Initialize方法
- 在PreInitialize添加依赖关系
- 在Initialize替换ControllerFactory
/// <summary>
/// This module is used to build ASP.NET MVC web sites using Abp.
/// </summary>
[DependsOn(typeof(AbpWebModule))]
public class AbpWebMvcModule : AbpModule
{
/// <inheritdoc/>
public override void PreInitialize()
{
//添加依赖关系
IocManager.AddConventionalRegistrar(new ControllerConventionalRegistrar());
IocManager.Register<IAbpMvcConfiguration, AbpMvcConfiguration>();
Configuration.ReplaceService<IAbpAntiForgeryManager, AbpMvcAntiForgeryManager>();
}
/// <inheritdoc/>
public override void Initialize()
{
IocManager.RegisterAssemblyByConvention(Assembly.GetExecutingAssembly());
//用WindsorControllerFactory替换MVC下默认的ControllerFactory
//MVC将使用WindsorControllerFactory从IOC容器中解析出controller
ControllerBuilder.Current.SetControllerFactory(new WindsorControllerFactory(IocManager));
HostingEnvironment.RegisterVirtualPathProvider(IocManager.Resolve<EmbeddedResourceVirtualPathProvider>());
}
}依赖关系表明：注册所有Controller
/// <summary>
/// Registers all MVC Controllers derived from <see cref="Controller"/>.
/// </summary>
public class ControllerConventionalRegistrar : IConventionalDependencyRegistrar
{
/// <inheritdoc/>
public void RegisterAssembly(IConventionalRegistrationContext context)
{
//注册所有Controller
context.IocManager.IocContainer.Register(
Classes.FromAssembly(context.Assembly)
.BasedOn<Controller>()
.If(type => !type.GetTypeInfo().IsGenericTypeDefinition)
.LifestyleTransient()
);
}
}WindsorControllerFactory将替代DefaultControllerFactory
从IOC容器中解析出Controller
/// <summary>
/// This class is used to allow MVC to use dependency injection system while creating MVC controllers.
/// </summary>
public class WindsorControllerFactory : DefaultControllerFactory
{
/// <summary>
/// Reference to DI kernel.
/// </summary>
private readonly IIocResolver _iocManager;
/// <summary>
/// Creates a new instance of WindsorControllerFactory.
/// </summary>
/// <param name="iocManager">Reference to DI kernel</param>
public WindsorControllerFactory(IIocResolver iocManager)
{
_iocManager = iocManager;
}
/// <summary>
/// Called by MVC system and releases/disposes given controller instance.
/// </summary>
/// <param name="controller">Controller instance</param>
public override void ReleaseController(IController controller)
{
_iocManager.Release(controller);
}
/// <summary>
/// Called by MVC system and creates controller instance for given controller type.
/// </summary>
/// <param name="requestContext">Request context</param>
/// <param name="controllerType">Controller type</param>
/// <returns></returns>
protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
{
if (controllerType == null)
{
return base.GetControllerInstance(requestContext, controllerType);
}
return _iocManager.Resolve<IController>(controllerType);
}
}模块的生命周期
1. PreInitialize
初始化之前：当应用启动后会首先调用这个方法，在依赖注入之前。
2. Initialize
初始化：这个方法一般是用来依赖注入的，一般调用IocManager.RegisterAssemblyByConvention实现。
3. PostInitialize
用来解析依赖关系。
4. Shutdown
当应用关闭以后，这个方法会被调用。
模块依赖
Abp框架会自动解析模块之间的依赖关系
[DependsOn(typeof(AbpWebCommonModule))]
public class AbpWebModule : AbpModule
{
/// <inheritdoc/>
public override void Initialize()
{
//依赖注入
IocManager.RegisterAssemblyByConvention(Assembly.GetExecutingAssembly());
}
}AbpWebModule依赖于AbpWebCommonModule，AbpWebCommonModule会在AbpWebModule之前初始化
这两个模块启动的顺序为：
AbpWebCommonModule.PreInitialize();
AbpWebModule.PreInitialize();
AbpWebCommonModule.Initialize();
AbpWebModule.Initialize();
AbpWebCommonModule.PostInitialize();
AbpWebModule.PostInitialize();
ABP先完成所有Module的PreInitialize，接着再执行所有Module的Initialize，最后执行PostInitialize。不是执行完一个Module的这三个方法，再去执行下一个Module的这三个方法
调用依赖模块
在AbpWebModule中如何调用AbpWebCommonModule中的方法？
在AbpWebModule中：
private readonly abpWebCommonModule _abpWebCommonModule;
public AbpWebModule(AbpWebCommonModule abpWebCommonModule)
{
_abpWebCommonModule = abpWebCommonModule;
}
public override void PreInitialize()
{
//调用abpWebCommonModule中的方法。
//_abpWebCommonModule.
}abp底层框架的一些功能模块如何注册？
底层的模块都会依赖于AbpKernelModule，AbpKernelModule中主要初始化各种拦截器，如审计日志、多语言、工作单元拦截器等。
public override void PreInitialize()
{
IocManager.AddConventionalRegistrar(new BasicConventionalRegistrar());
IocManager.Register<IScopedIocResolver, ScopedIocResolver>(DependencyLifeStyle.Transient);
IocManager.Register(typeof(IAmbientScopeProvider<>), typeof(DataContextAmbientScopeProvider<>), DependencyLifeStyle.Transient);
AddAuditingSelectors();
AddLocalizationSources();
AddSettingProviders();
AddUnitOfWorkFilters();
ConfigureCaches();
AddIgnoredTypes();
}