Spring @Lookup Method Injection | Bean Scopes | Interview QA | JavaTechie

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This tutorial will explain you to understand how can you inject prototype bean into singleton bean in spring using @Lookup method injection
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28 июл 2022

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Комментарии : 55

@punzzycool 2 года назад

Very good explanation with appropriate example. Keep it up the good work

@avinashsakroji1811 Год назад

So nicely explained. Thanks for posting good contents on your channel.

@pavanim6258 Год назад

very well explained .Thank you so much for your crystal clear explanation

@bugrae9341 2 года назад

So good and helpfull. I will wait another awesome video :D

@gasparcalix2095 Год назад

learning something i didn't know i need to learn, Excelente!

@sudheerkumar-tp1mg Год назад

Deep knowledge

@dedeepyaamasa4441 Год назад

As always you give quality content with explanation

@FactsNationReal Год назад

Very knowledgeable.. 👍

@abhaymishra8112 Год назад

Good Topic. And nicely explained.

@tanujkumaragrawal4756 2 года назад

Thanks sir for keeping us updated

@arvindpandey8793 Год назад

Great

@utsavshrivastava9481 2 года назад

Great explanation

@neha6000 2 года назад

Once again thousand of thanks 🙏

@sahilbhasin2112 2 года назад

Good, Can you cover real usecase for all bean scopes and in which best situation we can use other than default scope?

@Javatechie 2 года назад

Okay I will

@midhunnair6932 Год назад

Pls add this video under Interview QA playlist

@artemief 3 дня назад

Hi How can I test a method(let's call it methodA) in which I call a method(let's call it methodB) annotated with @LookUp? Right now I am getting a NullPointerException error when calling methodB inside methodA

@MrNil1982 8 месяцев назад

Pay attention that @Lookup method must be NOT private, otherwise you will get NPE exception.

@thatoshebe5505 Год назад

Please share how we can unit test a method making use of @lookup bean

@dasariravinder 2 года назад

You could add @Lazy on the ObjectFactory ... that should give the effect of @Lookup? pls clarify

@Javatechie 2 года назад

I guess you didn't get context on both the approach

@PiyushDhanwani 2 года назад

I have gone through all your angular vedios, but still there are many things which are not clear. It will be really helpful if you start a course to learn from Java script to reactive forms and then finally to angular framework.

@858Bikash 2 года назад

Hi sir please make a video on singleton design pattern with all scenarios like (cloning, sterilization,thread safe tec.) with proper explanation

@Javatechie 2 года назад

Bikash it is already there in my channel please search with keyword "singleton"

@andresflores4434 Год назад

You are amazing. But i have a question for you. How could i set the value of the weather ? Something like this. Inside UseService public String setCurrentTempFromAnotherAPI(String time) { return getWeatherServiceBean().setTodaysTemp(time); } I''m trying but allways i get a null value.

@Javatechie Год назад

Is this time you passed from controller

@chakpang147 2 года назад

If we create 2 UserService, is the hashcode of them still the same after using @Lookup?

@Javatechie 2 года назад

Yes of course why do you think different behaviour here

@vrmupparaju 9 месяцев назад

since its prototype scope, container will not destroy the beans ,how bean will be destroyed ??

@Javatechie 9 месяцев назад

Why won't it be destroyed?

@kunalsharma-zc2ho Год назад

Hi Basant , One doubt can we use similar approach for call static method from Service bean ? if not how should solve . My findings is we can use App. Context . ?

@Javatechie Год назад

Static method simply you can call using ClassName . No service bean instance required to call that

@kunalsharma-zc2ho Год назад

My Bad ...calling a bean class method inside a static method ?

@avinashshrivastava1512 2 года назад

I have taken your courses here i have one doubt if singleton bean inject in to prototype what will happen then

@Javatechie 2 года назад

Ofcourse. You can always inject any type of bean. If you are defining the parent bean as Prototype and then you are trying to inject a Singleton into that, it will be injected. But, think if that is what you want to do. Singleton beans instance are created only once. The main reason behind creating the Prototype bean is to have new instance for each request. Still, the prototype bean will be created every request. But, the singleton bean will always be the same once you have injected.