How are classes marked as singleton are initialized? Which scope do they use to be created?
Thanks in advance
7 Answer(s)
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I recommend you check this article https://medium.com/volosoft/asp-net-core-dependency-injection-best-practices-tips-tricks-c6e9c67f9d96
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@mailming I understand how DI works. What I am asking how are they being initialized in abp?
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They are initialized by the DI container, and abp uses [Windsor] (https://github.com/castleproject/Windsor).
Singleton components will only produce a single instance that is bound to the container. The instance will be created the first time someone requests it, and subsequently reused every time it's needed
Abp provides the IShouldInitialize interface. https://aspnetboilerplate.com/Pages/Documents/Dependency-Injection#ishouldinitialize-interface
Dependency injection containers can also use factory to create components.
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The instance will be created the first time someone requests it, and subsequently reused every time it's neededTake as example the EntityCache which is a singleton. It is using the dbcontext to get the entity from database if I am not mistaked. The first request that comes in the controller that uses an EntityCache is gonna use the dbcontext that was created for the first request. Is that right? -
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EntityCachenot a singleton service.SettingManageris a singleton service.It's usually the first request, but it will be created if you use it before requesting it, then reuse it. For example, call it when the application starts.
What problem have you encountered?
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Where can I call it?
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For example,
AppTimes, it will be created when the application is launched.
