What is Dependency Injection? | Why | Spring
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Spring Dependency Injection.
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In software engineering, dependency injection is a technique whereby one object (or static method) supplies the dependencies of another object. A dependency is an object that can be used (a service). An injection is the passing of a dependency to a dependent object (a client) that would use it. The service is made part of the client's state.[1] Passing the service to the client, rather than allowing a client to build or find the service, is the fundamental requirement of the pattern.
-wikipedia
Dependency Injection is a design pattern.
In this video we will see :
- What is Dependency Injection
- Why it is so famous
- An example of Dependency Injection explaining the process.
- Object dependency
- Loose Coupling
- Tight Coupling
- Dpendency injectction container
- Spring container
- Spring Boot
- @Component
- @Autowired
- Testing
- Mock Object
- Maintenance
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You're not just a programmer but also an awesome story teller. When asked about dependency injection people make it so complex that you start scratching your head.... But you explained like it was a piece of cake. 🙏
Big brother, you speak so beautifully your words directly injects into my brain without an error at all. Everything becomes so comprehensible when you explain it.
Sir, from the beginning of my programming you have been with me. Thank you so much for your instructions !
I have watched more of your videos to learn SWE topics than I can count. You have been instrumental in allowing me to understand these concepts intuitively. Big thanks!
One of the best TH-camr in teaching. Seriously I learned a lot from this channel
Man, 5 years old video and still the best explanation about dependency explanation. This guy truly knows the subject, and he knows which example to pick to explain what topic. He has the teaching spirit in him. Hands down the best youtube channel. whenever, i have a doubt i come here, dang the concepts are much clear. Kudos to you brother.
Really good explanation I covered Software Engineering recently + have been using Spring and Angular and never actually realised about this loosely coupled idea. Nice philosophy behind how project should be managed. Also the part of testing that loose coupling makes it easier to test, never realised that :-D ...... Great explanation a bit of practical would be plus ...
this is the best explanation about dependency injection in Spring ive heard so far. Simple but I can understand it so well! Thank you!
Best tutorial on dependency injection. Finally, I got what it really is.
My day starts with Telusko
Fantastic explanation that takes away the confusion. We tend to use such big words when a simple explanation is the best way. I have been doing this concept since 1975 and it always amuses me when the industry comes up with a new concept that really is just doing good programming with a different word. Great job!
man, the passion and joy of teaching in this guy's eyes is sight to behold...
Thanks for a very thorough and simple explanation. Your tutorials are addictive. God bless you.
You are the God of Java dude.. I was searching this explanation for a whole week and i got that within 8 mins from your video. Thanks a lot.
This guy is teaching me everything...i am not even browsing youtube. Once i find this guy i go ahead...and it always work. Best teacher
At it's core, dependency injection centralizes the creation of concrete objects that your client (meaning your code) uses and can use in many places. This provides many benefits, first you are able to easily switch out the implementation, you are able to easily test the implementation, and you are able to wrap or manipulate how you want it to instantiate. Whether it be wrapping authentication around it or adding pre and post processing, or auditing/logging to it and you can do this retroactively in the entire system in a very easy manner.
thanks for using classes on screen. got some idea of the concept.
ive been wandering around for days trying to find a proper explanation for DI...and although im focussed on DI in Dart this video was the BEST to understand what it means...thank you very much sir
I am thankful to you, I remember after graduation your videos were the source of preparation material for me for interviews and I landed a job. Respect from Pakistan.
Excellent explanation based on real practical example ! Thank you for sharing this valuable knowledge. Vladan Ulardzic
Im 7+ yr experience in java and spring and i always screwed up the defination of dependency injection in the interviews 🤣
Hlo bhai
This is the first time i understood dependency injection and the jargons related to it! Thanks.
Sir i'm a student of Cdac and even teachers here, also dont explain concepts like this. Thankyou sir❤
now i understand dependecy injection. what a great examples you use sir. easily understandable even for layman
This guy, men you are a good teacher. I don't know if you know David J. Malan from Havard?
You and that guy are my best teachers of all time. Good job!
I know David
Great Navin Sir you are always there to help me ...no words for this kind of explanation
Marvelous teaching style. Superb, Marvelous, Mind blowing.
Comprehensive and relatable. Nice analogies to explain the concept. Thanks Navin !
I saw so many video's and article about DI but still somewhere i'm confused but you solve it using very simple way...Thanks
You just explained the concept nicely manner. Thanks for explaining! finally got it.
Thank you for this clarification, I understood it completely!
Simplest and best explanation of DI. Thank you!!
Very good examplaination sir about dependency injection...
thanks for explaining in such easy way and you have given a very good example which make us to understand easily amd better way.
A simple and an excellent explanation. Thank you very much !
Sir You're a Greate Teacher.
As always, I understood the concept. Thank you!
How great teacher you are.. Lots of love and respect sir.. Great topics.. we need practical implementations of all these concepts in projects..
Thanks for reference.. I have watched the video.. greatly explained sir..
Sir i'm confused wheather i should learn new java10 features like var, garbage collectors etc or it's good or bad and future updates of java bcz oracle now saying many things... Please sir.. make a complete video on all these topics.. would be helpful..
Things are easy to understand but difficult to explain, thank you so much
Sensei.
you are the god of simple and elegant explanation of the most complex topics.
Clarity of DI is 🔥 by far the best video ❤️
One of the better Java channels :)
Yeah, now I understand .. what is dependency injection, why it is required, how it works ... this man is too good #telusko
Such an enjoyable video. Thank you sir :)
Very thorough, simple and informartive explanation!
The best teacher that i have ever seen , thanks a lot !!!!!!!
You are a great teacher Naveen garu, than you for the video series..
this is awesome...!♥️God bless you...!🙌🏻
You have got very good teacher skill. Awesome 👏 . Very clear and concise
Thank you, Sir. You really made it simple to understand :)
Such a good explanation ! Thanks!
Learned a lot. Thank you for putting this up.
The knowledge u share to us is priceless
Omg man you´re the best. It´s clear your explanation.
hands down! best video with simple explaination
You have improved lot in the area of content delivery.. keep going on
Your explonation is amazing. Thank you for the video
I forgot why I subscribe you, it must because of other video. But I know you save me again, so cleeeeeeeear and understandable. Thank you.
I thoroughly enjoy the way you explain things; you are undoubtedly talented at it. Personally, I highly value and appreciate the service you provide.
the best explanation I found on the internet................
Hey ! You have it so simple.Thanks for this :)
Best teacher on TH-cam 😍
Thank you so much Naveen Reddy !
I've some experience, and even I found this very useful. So far, I've used @Autowire n number of times to inject @Repositories in my @Services and to inject @Services in my @Controllers.
But after watching your video, it became crystal clear, why!!
The example of Hitachi and Samsung Harddrives implementing Harddrive interface and Laptop using loose coupling by means of someone else injecting the dependencies - @Autowire and @Component - is a truly great example, and it has helped me grasp this concept, I'd like to believe, concretely.
Earlier I knew how to use it, but wouldn't be able to explain so lucidly to some one if they asked WHY. I'd just say do like this, as it is industry standard :D :)
Similarly, I knew about JUnit testing with Mockito and mocking certain classes, etc. But didn't consciously realize that due to loose coupling only mocking is made possible. I never worried about how mocking is made possible. Now I know. :) \/,
So, thanks a lot. May god bless you !
You now have a new subscriber.
The example is awesome. Thank you
Extremely grateful for this explanation sir!
Quite Impressssive , i understand everything in just 8 min thanks
This is an excellent video, thanks for taking the time to make it! And for the people commenting that he needs to provide some sort of implementation, he posted a link to that in the description: @t
Awesome. So clear and simple.
This is a really great explanation.
Great explanation!! Really recommended. Thank you :D
Awesome! Well done on this tutorial.
Amazing! I enjoyed this!
Very useful and good explanation! Thank you!
I couldn't understand it yet I have to see it once or twice more but it look's like it is the best explaination of dependency injection. thanks
Very nice videos. The way you have taught spring mvc was awewsome. May I request you please upload the spring boot videos like that ie with creating a basic program.
Thanks for the real concept of dependency injection.
Sir, i want to learn Spring, which playlist is suitable for me to learn from scratch? Spring Boot or Spring MVC or any other playlist??
Wow, now that's a brilliant explanation 💯💯
Few developpers can explain.
Telusko can.
Thanks for sharing.
Marvelous sir ,I was in need of this concept and you made it very clear thankyou ..please make a video on AOP
Sir, you are a yogi who makes students enlightened.
This time I got your explanation for DI very very clear
I actually enjoyed this.Man O man you are a gem
Fantastic explanation! Thanks! Could anybody help with the difference between Dependency Inversion and dependency injection??
Very good explanation. Thanks.
became fan of your teaching...awesome sir
You have a talent for teaching.
No words.... only will say "CLASSY "!!!!
Explained very well.. I like your teaching
Really good explanation. Your example is very understandable.
such a simple explanation..it was awesome Sir
Great explanation, thank you
Such an wonderful lecture!!!!!!
love you man.. awesome explanation..
Thank you sir!!! Succinct and engaging explanation.
This was a beautiful way to explain it
This guy is GOLD !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Great Tutorial. Very helpful
Your videos are always best.
Very Very clean explantion.. clean as in understandable tq
Great I knew we use this for loosely coupled but the way he told is very good.