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

This tutorial will explain you to understand how can you inject prototype bean into singleton bean in spring using @Lookup method injection
Spring boot microservice course Offer will close soon so Hurry-up & Register today itself!
COURSE LINK : javatechie5246.ongraphy.com/
PROMO CODE : Java40
GitHub:
github.com/Java-Techie-jt/loo...
Blogs:
/ javatechie
Facebook:
/ javatechie
guys if you like this video please do subscribe now and press the bell icon to not miss any update from Java Techie
Disclaimer/Policy:
--------------------------------
Note : All uploaded content in this channel is mine and its not copied from any community ,
you are free to use source code from above mentioned GitHub account

[@punzzycool]

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

[@pavanim6258]

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

[@avinashsakroji1811]

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

[@bugrae9341]

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

[@gasparcalix2095]

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

[@dedeepyaamasa4441]

As always you give quality content with explanation

[@tanujkumaragrawal4756]

Thanks sir for keeping us updated

[@neha6000]

Once again thousand of thanks 🙏

[@FactsNationReal]

Very knowledgeable.. 👍

[@abhaymishra8112]

Good Topic. And nicely explained.

[@utsavshrivastava9481]

Great explanation

[@sudheerkumar-tp1mg]

Deep knowledge

[@sahilbhasin2112]

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

[@Javatechie]

Okay I will

[@arvindpandey8793]

Great

[@midhunnair6932]

Pls add this video under Interview QA playlist

[@artemief]

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

[@thatoshebe5505]

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

[@dasariravinder]

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

[@Javatechie]

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

[@858Bikash]

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

[@Javatechie]

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

[@PiyushDhanwani]

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.

[@chakpang147]

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

[@Javatechie]

Yes of course why do you think different behaviour here

[@andresflores4434]

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]

Is this time you passed from controller

[@gourabbanik2043]

Please make a video how to read data from xlsx Or xls and store in mysql Or any db

[@Javatechie]

I guess I already did this in my spring batch video

[@gourabbanik2043]

@@Javatechie I didn't find it could you please share the link btw I asking about Apache poi dependency

[@Javatechie]

My bad i thought your asking about XML but it's Excel let me check

[@swapnilburde7268]

Brother can you please use large font size so mobile users also view your code

[@Javatechie]

Sure buddy will do that

[@sushantkumar2631]

Sir make one video how to attend your class online from August 1

[@Javatechie]

Sure buddy i will upload that tomorrow even I am thinking to make open session for 1st August let's see

[@vrmupparaju]

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

[@Javatechie]

Why won't it be destroyed?

[@vedhvaishvikreddy1199]

Sir, prerequisite for spring microservice course.. ?

[@Javatechie]

Spring core is enough

[@TravelLifeStyleWITheEXPLORE]

Bhai weekly one deveops content pls.

[@Javatechie]

Bhai content also required . Almost all Devops I uploaded with separate playlist

[@TravelLifeStyleWITheEXPLORE]

@@Javatechie Thanks🙏

[@kunalsharma-zc2ho]

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]

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

[@kunalsharma-zc2ho]

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

[@sureshmanne7245]

What is the business scenario where a prototype bean passed into singleton bean?

[@avinashshrivastava1512]

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

[@Javatechie]

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.

[@itsnarahari]

Spring container will behave internally singleton only it will create one object if prototype

[@Javatechie]

For singleton bean it will create only one instance and prototype it will behave as it is

[@lordgreat6051]

Thank you sir but can you please make the fonts bigger it is difficult to see the code

[@Javatechie]

It depends where are you watching if mobile then please fit it to screen. Thanks i will noted it and going forward will take care

[@lordgreat6051]

@@Javatechie Thank you sir really appreciate it

[@Hitesh-fe9cc]

Solution: 8:20