Spring Boot Application Events Explained with Real-Time Examples |

Рет қаралды 18,725

Ай бұрын

#JavaTechie #DistributedMessaging #SpringBoot #ApachePulsar
👉 "n this video, we’ll explore Spring Boot's event-driven architecture, which offers modularity, asynchronous communication, and loose coupling. We'll explain event concepts, show real-time examples, and demonstrate running a Spring Boot application with custom event listeners.
What You Will Learn:
👉 What is Spring Events?
👉 Why we need Spring Events?
👉 Realtime usecase Hospital management system?
👉 Building Hands-On publisher & listener Examples using spring events
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Пікірлер: 70

@prasanthsanjeevi2563 Ай бұрын

Sir please do spring boot microservices real time project covering all patterns and tools please it's a request

@sushilbiswal1597 Ай бұрын

Yes

@Javatechie Ай бұрын

Hello Prashant, noted ✅️. I already have plans for this, but with my DevOps live course running, it's really difficult for me to manage time on weekends. I will definitely plan for it starting next month.

@prasanthsanjeevi2563 Ай бұрын

@@Javatechie even if it is paid also we are ready because we are eagerly waiting for your content

@gopikrishnacheekati1689 Ай бұрын

Yes

@Javatechie Ай бұрын

No need to pay Prashant it will be completely free course I will do in youtube

@faixan13 Ай бұрын

Everytime I learned something unique and new from you regarding springboot. :) Will wait for exception handling part.

@tararamgoyal2220 Ай бұрын

Thank you so much Basant for the exclusive content 🙏

@devolajide Ай бұрын

You are the only one that always give practical example to these concepts. Can you give tutorial on Domain Driven Design, Hexagonal Architecture and Spring Modulith?

@Javatechie Ай бұрын

Yes I will thanks buddy 👍

@gopisambasivarao5282 Ай бұрын

Thanks Basant. Appreciate your efforts, God bless you. 🙂🙏

@MohitSaini-tv8go Ай бұрын

Thanks Basant !! Awesome content !!

@psudhakarreddy6548 Ай бұрын

Thank you bro 😁😊. I am learning now things

@subhashsahu9930 Ай бұрын

By seeing your hardworking and deliver free contant is also motivates me to do some for society without any self interest. Hat's off sir....❤❤❤

@YashPatel-gp3gp Ай бұрын

Hi Basant, I love watching your videos, Thanks for creating top notch content. Love the way you explain with examples. I would like to request you if you can a roadmap based on your video content, which would allow us to successfully land our dream java dev job.

@Javatechie Ай бұрын

Thanks for your kind word surely I will prepare one 🙂

@ArshadMansuri-gb1so Ай бұрын

Thank you so much Basant for providing useful & Awesome content, i have learnt many things from your videos and keep going on...please provide some more real time project videos .its a request.

@balag2368 Ай бұрын

Wonderful content bro.

@JikiJakaLu Ай бұрын

Thank you 🙏🏿

@arunpallayil9485 Ай бұрын

Spring Rocks! So do you @Javatechie, Thank you!. This is indeed a much better design rather than Autowiring a thousand services in a class. Very simple and right at the heart of SOLID. Great stuff. I am not sure of the idea of running it as @Async as the discharge process in this case is ONLY successful if ALL the downstream services are successful. Anything fails, the whole things fails. Unless and until we have a method to handle the failures, blocking approach is better. Anyway, Thanks again!

@Javatechie Ай бұрын

Hello Arun , I do agree but same thing can be handle with async as well I will cover that error handling next

@arunpallayil9485 Ай бұрын

@@Javatechie Thank you. I just did a PoC myself. I used SpringRabbit (As my micro-services are using messages and not API calls. API calls gets terminated at Gateway and from there its messages.) Once the message is received, I am sending the message body to appropriate event class based on the message header. Then instead of writing massive long service methods, now I can write simple event handlers where each event is a small feature - such as SignInEvent, SignUpEvent, ForgotPasswordEvent - so easy to understand, so easy to test and maintain. Talking about testing, if you can cover the JUnit part of event testing that would be awesome too. This whole thing made my end to end architecture fully async as well. Earlier it was async only up to the method calls. So thanks again! Waiting for the next video to learn how are you handling the error handling. Cheers! ❤

@gajendrathakur4833 Ай бұрын

Thank you Sir😊

@mareeskannanrajendran594 Ай бұрын

Thank you for the content. Your content always helping me to learn new new things, keep on going. Could you please clarify me on handling exceptions while using Spring Events? Also how to capture the result of the execution in the publisher?

@rishiraj2548 21 күн бұрын

thanks a lot

@manjindersingh5874 Ай бұрын

Thanks

@Javatechie Ай бұрын

Thank you for your gift 🎁. Keep learning 😊

@satishmarutham3195 Ай бұрын

Thanks Basant.. When could be except the Second Part of Helm

@somethingforyou891 Ай бұрын

If we have different methods in Notification or Other Handler classes, then how it takes excecute perticular method for the event. If I mention @EventListener @Async for other methods too.. Could you please explain it. Thanks for your way of explanation. Big fan of You ❤️

@sachinmukherjee29 Ай бұрын

Thank you Basant for this awesome video. One question what if one of the services fails to process the event then how do we handle this scenario?

@Javatechie Ай бұрын

I will cover this fault tolerance part

@immortalhuman7085 Ай бұрын

Hi you explained all void services. What if we want to retrurn from one service and consume the output in different service. Also What if any service in your example throw an exception? I know if exception thrown from thread will not hamper other threads all are running in thier own threads.

@sureshsadanala3605 Ай бұрын

thank you Brother for sharing new concept :). I have one query here, Based on what order sprint events listener will execute. understood this is sync process but want to know how listener orders is preserved here

@Javatechie Ай бұрын

Currently it will execute in async manner but you can maintain order of execution using @Order(count) in listerner Note : this is not recommended approach 😐. Because async means can't predict

@sureshsadanala3605 Ай бұрын

@@Javatechie Basant For my business case, I need to execute in the sync manner, still can I use spring events ?

@krishrajan8670 Ай бұрын

Good one One question, how to consume clean the room before go to billing for example

@Javatechie Ай бұрын

We can set the order only if it is synchronous buddy, since it is async we cannot expect order

@deeplife9654 Ай бұрын

Hey bro , would you like to make a video on Jackson api , converting json file to java object and vice versa ?

@shwetharajesh424 Ай бұрын

How do we handle errors in this case? How to reprocess the failed events?suppose if house keeping service fails, how to handle it?

@Javatechie Ай бұрын

I will cover that in next part

@shwetharajesh424 Ай бұрын

@@Javatechie Thanks

@esmaeeilenani2005 Ай бұрын

@@Javatechie you are the GOAT

@sairammanchala40 Ай бұрын

Hi, can you please do a video on sending data with gzip requestBody with spring reactor Webclient.

@Javatechie Ай бұрын

Yes I will

@ramrockzz8773 Ай бұрын

Hi Sir, Do you do 1:1 mentoring in which we can ask our doubts related to java spring boot microservices? It can be through chat

@sumantaghosh4239 Ай бұрын

Thank you so much, but I have one question. In the case of distributed microservices, is this approach sustainable, or do we have to use message brokers?

@Javatechie Ай бұрын

Yes ,This approach is only for within a application (intra application communication )

@akshaykumar-uv3up Ай бұрын

How do we handle exceptions in kafka (both consumer and producer).

@manikantab7677 Ай бұрын

What if we need to maintain a order of execution of services consuming the event. How can that be handled.

@leovelcamiloneto3608 Ай бұрын

In that case if service A need to be the first consuming event E and B second, all you need is to do is to make the service A publish another event E1 after consuming event E and then service B consume event E1. E -> A -> E1 -> B

@esmaeeilenani2005 Ай бұрын

what if we have a hierarchy of execution we need to maintain?

@RaviYadav-cx2pb Ай бұрын

Add database integration

@TheMrtest123 21 күн бұрын

How to do the exception handling if there is issue with notification service?

@Javatechie 21 күн бұрын

It's good to propagate the error from service to the caller

@TheMrtest123 21 күн бұрын

@@Javatechie but let's say error is in notification service which is async. What is the best way to handle the error

@bala7965 Ай бұрын

Hi bro when will your devops course complete?

@Javatechie Ай бұрын

Before 20 June

@malleswarrao3887 Ай бұрын

Hi Sir please plan for migration project sir

@djoleezcool Ай бұрын

As I understood they are to reusable in other services (spring-apps)? I don't see really use case where this will be better solution than just use async at top of async method.

@Javatechie Ай бұрын

It will be very useful for monolithic architecture please try re visit the intro again

@sumitkarmakar9098 29 күн бұрын

@djoleezcool, there's a difference.. architecture wise EventListener approach is better. Here the parent method is not tight coupled. So, in future, if any child method is removed from the process or any new process needs to be added, no changes are required in the parent method. We just need to remove the Listener from the child method or add a new Listener.

@rabindradocument8934 Ай бұрын

We can do a direct method call also, why do we need events.

@Javatechie Ай бұрын

Hello Rabindra, I explained it what's the drawback of durect method call

@rabindradocument8934 Ай бұрын

I understand. Tight coupling issue but with interface design we can make it loose coupling. Just like spring provides ApplicationEvent a abstraction we can have our own. We should have a custom annotation that will using executor service to make calls in async nature

@rabindradocument8934 Ай бұрын

I am asking this because our application doesn't use spring. It is a legacy one but we want above functionality

@Javatechie Ай бұрын

I understand, but this is a feature of the Spring framework. If your app is legacy and not using Spring, you can go with the interface approach. This approach is not fully tightly coupled but only partially.