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This article mainly explains "what is the life cycle of abp module". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the life cycle of abp module".

Lifecycle events are abstracted into four interfaces in abp:

/ / Preinitialization

Public interface IOnPreApplicationInitialization

{

Void OnPreApplicationInitialization ([NotNull] ApplicationInitializationContext context)

}

/ / initialize

Public interface IOnApplicationInitialization

{

Void OnApplicationInitialization ([NotNull] ApplicationInitializationContext context)

}

/ / initialization completed

Public interface IOnPostApplicationInitialization

{

Void OnPostApplicationInitialization ([NotNull] ApplicationInitializationContext context)

}

/ / close

Public interface IOnApplicationShutdown

{

Void OnApplicationShutdown ([NotNull] ApplicationShutdownContext context)

}

Abp defines a module lifecycle interface that has only two methods for initializing and shutting down.

Public interface IModuleLifecycleContributor: ITransientDependency

{

Void Initialize ([NotNull] ApplicationInitializationContext context, [NotNull] IAbpModule module)

Void Shutdown ([NotNull] ApplicationShutdownContext context, [NotNull] IAbpModule module)

}

The parameter to this interface is the type of the IAbpModule interface, that is, the module type derived from AbpModule. The interface has a default implementation, which is an abstract class, mainly for reuse.

Public abstract class ModuleLifecycleContributorBase: IModuleLifecycleContributor

{

Public virtual void Initialize (ApplicationInitializationContext context, IAbpModule module)

{

}

Public virtual void Shutdown (ApplicationShutdownContext context, IAbpModule module)

{

}

}

Abp has four types based on the four lifecycles, which are created based on the module lifecycle base class.

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)? .OnApplication Shutdown (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)

}

}

Only the "close application" lifecycle implements the Shutdown method, and the rest implements the Initialize method. Finally, the parameter abp module is passed in to invoke the corresponding life cycle.

The analysis figure is as follows:

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