Spring boot: Bean and its Lifecycle | Inversion of Control (IOC)

➡️ Notes link: Shared in the Member Community Post (If you are Member of this channel, then pls check the Member community post, i have shared the Notes link there)
➡️ Join this channel to get access to member only perks:
/ @conceptandcoding
Spring boot playlist: • Spring Boot from Basic...
Pre-requisite: Java ( • JAVA from Basics to Ad... )
Chapters:
00:00 - What is Bean
01:00 - How to Create Bean (Component annotation)
05:16 - How to Create Bean (Bean and Configuration annotation)
10:55 - ComponentScan annotation
14:01 - Eagerly Initialized and Lazy-initialized Bean (Lazy annotation)
16:40 - Lifecycle of Bean (PostConstruct and PreDestroy annotation)
#springboot #java

[@aritrajsays]

Your teaching style is so unique! One of best channels across KZbin.One small request to you that please complete the playlist within 6 months.Thank you again for the quality content.

[@harshitagrawal997]

This video is loaded with so much information. Each one of your videos is compelling me to comment. Thanks man ♥

[@prasannapm3220]

Eagerly waiting for next videos in this springboot playlist

[@grrlgd3835]

Great content. Pitched exactly right. Thanks

[@ConceptandCoding]

thanks

[@shivam17_95]

Thanks for the Great content bro ! It's easy to understand and properly explained.

[@tejaswigutta-op5fr]

Completed watching this video. Great content bro🎉. When will you release the next video?

[@raviravi-gg5ck]

Thanks a lot, it cleared my doubts

[@mukulkopulwar]

Thanks for sharing 😊

[@sahildadhich59]

very nicely explained

[@thedev007]

Well explained,

[@asharc6410]

Thanks for the video

[@baburaomulaparthi4531]

Great content bro.

[@karanya0929]

superb content

[@subhamsadhukhan9098]

Great Video as usual

[@ConceptandCoding]

thanks

[@umanathjha5927]

Great content! Just one input - if we have a default constructor along with a parameterized constructor, two beans should be created.

[@ayushigupta685]

Please explain more concepts in spring boot, It will be really helpful.

[@ConceptandCoding]

sure

[@rohitgavande]

Please try to increase upload frequency...it will be really helpful

[@ConceptandCoding]

sure will try my best

[@justinstorm]

Nice nice nice Thank you

[@mohammadwazir5566]

Should have also discuss about ApplicationContext and Bean Factory . Still very handy video.

[@singhji4149]

Shreyansh excellent video, waiting for async in springboot video with completable and futures

[@ConceptandCoding]

noted

[@akshitkumar6450]

There are three membership options for your account which one to join such that i have access to the notes of all the three java, LLD/HLD and spring boot series ?

[@chellimalayilradhakrishnan7872]

Really awesome teaching. Can you come up with Data structures and algorithms videos as well???

[@suryanshraghuvanshi9761]

at 9:22 we can use @Bean(name=" ") for specifying bean name and qualify speccific bean using @Qualifier with bean name

[@santoshbhatnagar2155]

do we need to mention the bean path in the applicationcontext.xml file in spring boot?

[@vishalgavale6375]

Hi sir ,Yours video is very informative and understanding concepts in the simple ways can you make dsa playlist.

[@ConceptandCoding]

in future, i will try buddy

[@UnderflowGaming]

Great content, can you please upload example code to git? Thanks

[@shailesh5514]

For class which doesn't have a default constructor ie; we have made our own parameterised custom constructor , we are supposed to add @bean and its function. right? @component won't help?

[@ConceptandCoding]

i will cover it in next video, it will clear your doubt

[@akashhivre6566]

Hi sir will you please tell us what should be skills in which we have to master before giving interview as a Java springboot developer with 2+ year of Experience... ?

[@ritikagrawal9768]

Shreyansh, you said while creating bean spring calls default constructor . so do we need to provide a default constructor for every class that i want to make bean of ?

[@jayendratodawat9773]

If you don't have any constructor defined in your class then spring will automatically use default constructor so you don't have to provide default constructor every time, but in case of multiple constructor if you have provided default constructor then it will use that constructor for bean creation.

[@ritikagrawal9768]

@@jayendratodawat9773 okh got it

[@rishikant7357]

So when we use @Lazy annotation it will change scope of bean like if its singleton and by using @Lazy will it change to prototype?

[@ConceptandCoding]

no its still a singleton, just it tells spring to not do eager initialization

[@user-ie9yw4wr2j]

Sooooo goooddddd

[@souravpatra0175]

@ConceptandCoding if I initialized a bean UserInfoDTO userInfoDTO = new UserInfoDTO() like this, without using @Component and @Configuration , then also bean will create as usual, then will it be managed by ioc container and if not then why we are using this annotation, as we can create bean manually and garbage collector will destroy the bean when it's no longer needed ??

[@ConceptandCoding]

if you create an object using NEW keyword, then object is not managed by IOc and its not called bean. As bean are the objects which are managed by IOc.

[@souravpatra0175]

@@ConceptandCoding ok got it

[@ibrahimshaikh3642]

Very good with all the confusing question, aap ek book publish kar do

[@ConceptandCoding]

sorry, you can post your questions here which you find confusing, i will try to answer

[@baburaomulaparthi4531]

Can you please make a vedio on spring circular dependency issue.

[@ConceptandCoding]

noted

[@rahulas721]

Does Spring use Reflection to find the classes with @component or methods with @Bean? If no, then how does it do it??

[@ConceptandCoding]

yes, pls check the Annotation video in Java playlist

[@rahulas721]

@@ConceptandCoding Thanks for Confirming. I have already watched the Annotations Video in Java Playlist, just want to make Sure that my understanding is Correct.

[@vivekakundi]

When @SpringbootApplication is be default having the @ComponetScan then why we are again providing @ComponentScan?

[@ConceptandCoding]

just to show that we can override the base package value

[@akashbhadouria6727]

Bro please try to put 2 videos a week 🙏🏻

[@ConceptandCoding]

sure will try my best

[@harshgarg0906]

What is the difference between @Configuration vs @AutoConfiguration When to use which

[@ConceptandCoding]

for auto configuration pls check 1st video (Introduction) and for Configuration pla check 5th video (Bean and its lifecycle)

[@harshgarg0906]

@@ConceptandCoding Shreyansh I am here asking about the annotations @autoconfiguration not the auto configuration of spring boot

[@InquisitiveDev]

Would it be possible to get your notes for these topics?

[@ConceptandCoding]

i have shared the notes in member community post buddy.

[@InquisitiveDev]

@@ConceptandCoding I bought the membership for notes and multithreading videos. Totally worth it!

[@ConceptandCoding]

@@InquisitiveDev glad to know that.

[@sumanta8504]

Has anyone checked if the User bean was created using both @Component and @Configuration annotations? I've tried it, but I always get the bean created by @Component. However, the video mentioned that priority should be given to @Configuration. Interestingly, when I commented out @Component, the bean created by @Configuration started showing results.

[@drostwades824]

He mentioned that when using @Configuration we need to remove @Component

[@souravpatra0175]

Hi, it happens when you are using or injecting component annoation generated bean, to use or inject configuration gererated bean you just need to keep the bean name same with @component bean in configuration class bean method, after this you will get expected behaviour

[@sahilGupta217]

Will your notes be in PDF format?

[@ConceptandCoding]

no , online zoho notes

[@sahilGupta217]

I was thinking, if it were PDF, then I'll take print out of it so that I myself don't have to create notes.

[@CodeWithSachinYadav]

Please attach the notes also sir because only watching the video is not helpful please please attach the notes also sir

[@ConceptandCoding]

pls check member community post section

[@AshishkumarGupta-ld5vc]

Let say we have a class A , it does not have bean i.e @Component. But we have another class Order for which bean in created. Now i try to autowire the Order in class A. Will this work ? Or do I need to make class A with @Component? Can you help me to understand why or why not it works ? class A { @Autowire Order order; }

[@ConceptandCoding]

it will not work. as class A is not managed by Spring IOC.

[@user-cg9xk6wl5r]

i think you are just increasing length of video ,i haven't found anything from your video