abp中將生命周期事件抽象為4個(gè)接口：

//預(yù)初始化 public interface IOnPreApplicationInitialization {void OnPreApplicationInitialization([NotNull] ApplicationInitializationContext context); }//初始化 public interface IOnApplicationInitialization {void OnApplicationInitialization([NotNull] ApplicationInitializationContext context); }//初始化完成 public interface IOnPostApplicationInitialization {void OnPostApplicationInitialization([NotNull] ApplicationInitializationContext context); }//關(guān)閉 public interface IOnApplicationShutdown {void OnApplicationShutdown([NotNull] ApplicationShutdownContext context); }

abp定義了一個(gè)模塊生命周期接口，該接口只有兩個(gè)方法，用于初始化和關(guān)閉。

public interface IModuleLifecycleContributor : ITransientDependency {void Initialize([NotNull] ApplicationInitializationContext context, [NotNull] IAbpModule module);void Shutdown([NotNull] ApplicationShutdownContext context, [NotNull] IAbpModule module); }

這個(gè)接口的參數(shù)是IAbpModule接口的類型，也就是派生自AbpModule的模塊類型。該接口有一個(gè)默認(rèn)實(shí)現(xiàn)，是一個(gè)抽象類，主要是用于復(fù)用。

public abstract class ModuleLifecycleContributorBase : IModuleLifecycleContributor {public virtual void Initialize(ApplicationInitializationContext context, IAbpModule module){}public virtual void Shutdown(ApplicationShutdownContext context, IAbpModule module){} }

abp根據(jù)四個(gè)生命周期分別有四個(gè)類型，這四個(gè)類型是基于模塊生命周期基類創(chuàng)建的。

public class OnApplicationInitializationModuleLifecycleContributor : ModuleLifecycleContributorBase {public override void Initialize(ApplicationInitializationContext context, IAbpModule module){(module as IOnApplicationInitialization)?.OnApplicationInitialization(context);} }public class OnApplicationShutdownModuleLifecycleContributor : ModuleLifecycleContributorBase {public override void Shutdown(ApplicationShutdownContext context, IAbpModule module){(module as IOnApplicationShutdown)?.OnApplicationShutdown(context);} }public class OnPreApplicationInitializationModuleLifecycleContributor : ModuleLifecycleContributorBase {public override void Initialize(ApplicationInitializationContext context, IAbpModule module){(module as IOnPreApplicationInitialization)?.OnPreApplicationInitialization(context);} }public class OnPostApplicationInitializationModuleLifecycleContributor : ModuleLifecycleContributorBase {public override void Initialize(ApplicationInitializationContext context, IAbpModule module){(module as IOnPostApplicationInitialization)?.OnPostApplicationInitialization(context);} }

只有"關(guān)閉應(yīng)用"這個(gè)生命周期實(shí)現(xiàn)Shutdown方法，其余的都是實(shí)現(xiàn)Initialize方法。最后是傳入的參數(shù)abp模塊去調(diào)用對應(yīng)的生命周期。
剖析圖如下：

總結(jié)

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