Spring Boot | Spring Data JPA Transaction Management | @Transactional | JavaTechie

In this tutorial, we're going to learn What is Transaction and it's real time implementation
#javatechie #Transaction #SpringBoot
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[@rockyrocko-j2gk]

Start at 27:00 if you know the basic struct of Spring Boot app with service

[@bathulanagendra4621]

Nice video sir. Sir if possible create video on first and second level cache explanation with examples.

[@bhaktilatadash7619]

I am requesting also same

[@yatri6329]

First level by default, through session or persistent context

[@hrishavdhawajpurkayastha7299]

Very informative and very good way of explaining transaction in spring Thanks for such tutorial Looking forward for the video related to isolation, propagation, rollback etc. etc

[@bosaeed2011]

If you don't have time you can just jump to 25:30

[@mahfooz15]

Please create a video related to isolation and propagation in details

[@SK-rx8yq]

He explained everything, except main content related to transaction management and its annotation's meta data 😕

[@abhishekkoranga1378]

Read all the articles from the links in google search , but still couldn't understand the purpose of it . Everyone was telling what it does but it was absolutely clear when you explained it . You are doing a great work brother . Keep it up 👏👏👏.

[@Javatechie]

Thanks Abhishek 😊

[@N.KhanSaab]

I appreciate your time, You're putting lots of efforts :) God bless brother :)

[@maheshtambe9535]

Its very boring try to create consice and upto point vedeo and discuss properties of transactions.

[@Javatechie]

Mahesh already I mentioned based on viewers response I will continue transaction properties .

[@Raj-hm6qi]

Waiting for in depth video on transaction :)

[@adverturer9057]

Hibernate is unable to create SQL queries while compiling. says unable to find any such database. Can u add sql queries in description

[@pramodjalindra5414]

Let's suppose I have hit the post api and saved the data in db via jpa ... Now I am using back button and resubmitting the request again 3 time and each times data is pushed in db ..and I don't want to insert resubmitted data in the table , could you please tell me how we can achieve this TIA 😊

[@Javatechie]

Just use composite key it will solve your problem otherwise you can disable auto generate id in entity class

[@pramodjalindra5414]

@@Javatechie interviewer said just use Springboot concept... He gave me hint of using @transctional

[@skumar-vl7iq]

Sir please teach the spring transaction for lower to higher level.

[@AmritAgarwal07]

Some articles are also using @ transaction at class level if possible. And then we should use that

[@_ravi_kumar_gupta]

Awesome explaination. Can you make a video on transaction between two microservice. It will be very helpful.

[@kirane5911]

Thank you very much Sir for this video and Good Explanation. Through you videos, I got knowledge and many folks watching your videos are getting knowledge. Please keep uploading videos.

[@Bladeeey69]

Hi Sir. I had a query that why we did not define an EntityManager since we are working with JPA and managing transactions. Kindly reply as it would of great help. Thanks!

[@Javatechie]

I am not creating datasource manually here so spring boot will do this job for me create datasource then build Entity Manager . That is what advantage of spring boot auto configuration

[@rthiaga]

If you encounter MYSQL timezone issue. Then use the serverTimezone query string in applicaiton.properties spring.datasource.url = jdbc:mysql://localhost:3306/javatechie_youtube?serverTimezone=UTC

[@Javatechie]

Thanks for info

[@muralijava552]

When I am trying to run this example in my local I am getting below error org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'springDataJpaDemoApplication': Unsatisfied dependency expressed through field 'service': Error creating bean with name 'bookingService': Unsatisfied dependency expressed through field 'passengerInfoRepository': Error creating bean with name 'passengerInfoRepository' defined in com.springdata.jpa.api.repo.PassengerInfoRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Not a managed type: interface com.springdata.jpa.api.repo.PassengerInfoRepository

[@manchoduprashanth7167]

If we use @restcontroller at class level.. Do we really needs to use @RequestBody annotation in method level..?

[@Javatechie]

Ofcourse purpose of @RequestBody is different . I would strongly suggest you to understand about this annotation

[@subhrajeetpadhy]

@Java Techie Hi Basant, I declared the @Transactional at the method level and declared the @EnableTransactionManagement at application level. I am still facing the issue that record persisted into primary key table where foreign key table doesn't have entry in case of exception. Its a Spring Data Jpa project. Any suggestion where to look upon. Please...

[@Javatechie]

Can you share your GitHub source code link please

[@sreevisveswaran6557]

Hi This video is very informative I also want Propagation and Isolation in Spring Transactional. Can we have a video for that ?

[@shraddhagujrthi5756]

Where to find the schema java_techie....getting database not found ..reply asap...

[@Javatechie]

You need to create it manually . Create database javatechie; Use javatechie;

[@prometheusli101]

great video，but i recommend you that add subtitles will be better

[@iammanishganguly]

Fantastic explanation. We wait for the next part. Transaction propagation and Isolation levels etc. Thanks for sharing

[@bhargavi4557]

Could any one please answer this In dev environment or product environment. Through swagger or through Ui, multiple users can access the same service at a time. How service will handle multiple incoming request. Please do provide answers

[@Javatechie]

When user calls api then server will create a separate thread per request and process it

[@adrianharmann2955]

Hi, great explanation. But there is a part of code that l dont quite understand. When l try to post an invalid entry, for instance with an invalid fare for my chosen "accountNo", the program will fail to persist it in the database. That's happening FlightBookingService.java. I dont quite see, where it prevents the passengerinfo from being persisted. I mean, yes l understand @Transactional annotation is doing some magic and is preventing the passengerInfo from being written to the DB. But still l dont know where the condition is happening. Like, where does the spring magic happen, that says "stop persisting, because amount is insufficient". is there an if clause that lm missing?

[@Javatechie]

Spring internally used Aspect oriented programming so that in runtime it create one class and extend it from your class where you annotate transaction Then it will override your tx method and it will begin committee and if there is any error simply it will rollback

[@pranavtallewar6551]

Very good explanation! Waiting for Transaction isolation/propagation video

[@attrayadas8067]

Why did you say that association mapping is not a good practice in Microservices? How are we solving that requirement in microservices?

[@Javatechie]

Please checkout the database per service design pattern you will understand

[@sumitbora9245]

Sir please make 1 vedio on multithreading interview question. like in realtime project in which case people use multithreading in the project. please please sir

[@Javatechie]

Yes I will

[@rajthakkar0071]

what is relation between entity and repository ? can we have one repository for multiple entities ? Can one entity have multiple repository ?

[@Javatechie]

Raj have you gone through spring data jpa if not please check that this is basic of spring data jpa impl

[@sujith6323]

Could you please explain why you said association making is not good for microservices and what alternatives we have there other than association mapping.

[@Javatechie]

API composition design pattern

[@roshanpatro5777]

Such an amazing tutorial. Thank you so much!!!! ❤

[@govindkamath9931]

Great Explanation!😀

[@Matthew-hh6ex]

Very informative 👏 thanks for sharing. I wish I could give more likes.

[@nareshn6628]

Great video .Looking forward for the video related to isolation, propagation, rollback etc. etc

[@chaitrapavate3759]

I am not able to get @Entity enabled. I am not bale to import javax.persistence.*. Please tell me a fix to this.

[@Javatechie]

Check the dependency in pom and verify whether you have jpa or not

[@GAneshStudyGAng]

Please do video on propagation and isolation

[@sachinmankotia2291]

Do we need to add @enabletransactionmanagement? isn't it implicitly there in Spring boot?

[@Javatechie]

Not required

[@rohitsharma-xt8qe]

Good example and explanation, just a quick question how long it will take to create such demo application ?

[@Javatechie]

Thanks 15 min

[@Srini8174]

Thank you.explain on dB cache first and second level with example

[@Javatechie]

Okay will create one more session

[@ch.chandrasekharreddy5543]

Hai sir data storing always in passengerinfo table even using @transactional with exception raising ,how can i resolve it. please tell me sir.

[@Javatechie]

Please checkout my github code and compare

[@20M_Target_1.0]

Hi Basant, will it work with calling to the external micro services using restTemplate.

[@Javatechie]

No for microservices you need to go for saga design pattern.

[@sharibzafar734]

Hi Basant, nicely explained, please add video for Transaction properties

[@mallesrao]

Hi thanks for your inputs for us, can i get the internals of transaction and isolation , rollback and propagation

[@Javatechie]

Yes I will upload that but it might take some time to do

[@vishalmewati7997]

As always Basant sir Thankyou for your time and in depth knowledge share to us ❤

[@amitkumar7566]

How to take care of transaction management when there are calls to other microservices inside the service method along with database save?

[@Javatechie]

That we need to follow saga pattern ,I will cover this as part of reactive programming

[@myakhandbharat-2024]

Basant - Its a nice video and info , I have a request if you will be able to make one video on debezium as well

[@Javatechie]

I am not aware that this will check and update

[@vikramsamavedam5625]

@Java Techie I am using @transactional with multiple datasources in spring-boot, passenger-info is being saved into H2 while payment-info is being saved to mysql , when InsufficientFundsException is triggered data is not persisted on H2 but in the console I can still see the insert statement: Hibernate: insert into passenger_info (passenger_id, arrival_time, destination, email, fare, name, pickup_time, source, travel_date) values (null, ?, ?, ?, ?, ?, ?, ?, ?) In the video this was not observed. Is this ok or am I missing some step

[@Javatechie]

It's not possible to handle same transaction in two different datasource to achieve that you need to work on some distributed transaction or you can go with global transaction

[@vikramsamavedam5625]

@@Javatechie Yes i use the concept of ChainedTransactionManager for chaining the H2 and MySQL transaction managers and data is also not getting persisted into H2 The only issue is I am able to see the insert statement in the log

[@sagarsaud156]

Is there any way to submit the list from javascript form (input type="text" name="n") added dynamically. I tried using table tr td append. And tried String[] nm = request.getparametervalues("n"); But spring controller can't find it. Help me.

[@Javatechie]

Can't you pass object in java script using ajax post method call So that you can get data in controller with @RequestBody

[@sagarsaud156]

I can. But Iam not doing ajax post. And I am using javascript for creating dynamic input text.

[@simashpokharel6044]

Hello Sir , Can you please make a video on spring boot + memcached

[@Javatechie]

Good suggestion I will definitely look into this

[@sureshsadanala4639]

Good one, waiting for propagation and isolation levels in-detail video. thank you

[@sripalkolli2554]

Nice video. Sir, How to solve the above issue in mongodb database.

[@Javatechie]

Directly we can't

[@responsibleindian654]

Spring boot Transaction will work for MonhoBB also??

[@Javatechie]

No it won't work for NoSQL

[@foodgallery5819]

Thank you so much for the video, can you please share the link where I can see the video related to isolation, propagation, rollback.

[@sopranosmohit]

Why association mapping is not recommended in Microservices? I am new to learning spring boot and hibernate and was wondering why projects don't use association like one to many wouldn't that automatically handle Transaction managment. Please help would highly appreciate

[@Javatechie]

If you are using Microservices then you should follow database per service

[@sopranosmohit]

@@Javatechie I mean the database still remains the same. Like in your example here, there are two entities both for one database. I am also saying two entities both for one database but mapped to each other by @OneToOne or @OneToMany, in that case also if for the second entity insert is not possible(Constraint Error) , both the first and second entity will not be persisted by save method.

[@Bimal_Behera]

I'm using JdbcTemplete and this is not working for me. Can you please help me ? I don't understand what msistake I'm doing@JavaTechie

[@Javatechie]

You need to build datasource and inject ds into jdbctemplate This example am using jpa

[@Bimal_Behera]

@@Javatechie Hi, I used that too, still not working. Please have a look in this example stackoverflow.com/questions/66039922/how-to-use-rollback-with-jdbctemplate-of-springboot

[@amruteshwarbichewar1731]

Why it's not good to use association mapping in microservices archi

[@Javatechie]

Because microservice follow database per service pattern

[@azatburkhanov1397]

thank alot for your explanations. How to get/install create -> New -> Generate POJOs from JSON functionality in IntelliJ?

[@Javatechie]

You want to create pojo from json automatically?

[@azatburkhanov1397]

​@@Javatechie I don't have such functionality at Intellij. And i just wonder how did you get it. I saw prevously that you used www.jsonschema2pojo.org/ to convert from json to pojo (kzbin.info/www/bejne/lX6wl2WJq7OkrtE) and seems like build-in tool could be more convient to use that going to this website.

[@sushantbhardwaj3080]

Please create video on Propgation, Isolation and rollbackfor .....thanks in adv.

[@rahul20versity]

Why not add assosiation mapping if it’s a micro service??

[@Javatechie]

Because it violates the principle of database per service partner

[@diegov9799]

Hi Java Techie, could you make a video about locks in JPA?

[@Javatechie]

Cool I will check this out and update you

[@athirashree6820]

Great class sir, conveying complex things in the most simple way. thank you

[@Javatechie]

Thank you Athira , keep learning 😃

[@youtubeek9428]

Nice thank You But why you not use @Repository in repository package Can I use that?

[@Javatechie]

You can use but it's not mandatory spring is smart enough to scan your bean if we follow proper package hierarchy

[@youtubeek9428]

@@Javatechie okay thanks 🙏😊

[@manojkumarpadarthi4805]

Is @EnableTransactionManagement required in springboot application ?

[@Javatechie]

I think yes you need to add it

[@manojkumarpadarthi4805]

@@Javatechie I have read some where else that it is not required in springboot application as it is enabled by default. Can u also make a video about different attributes of transactional annotation (propagation,isolation,rollbackfor etc)

[@jasper5016]

This is a fantastic tutorial. If you have several functions and each needs commit. However, if the last one fails, it should rollback all. How to manage this?

[@Javatechie]

You need to keep all dependant logic in a single transaction

[@jasper5016]

@@Javatechie Thanks Basant

[@edilsonhdz]

Sequence is changing with every request fail. 🙃

[@Javatechie]

Yes it will

[@ashokkumarrout688]

Bro i hv an issue .Entity must not null exception coming.

[@Javatechie]

Check all the annotation in entity class , if everything okay then only change table name and restart your application

[@vengateshm2122]

If Transactional annotation is used every operation is considered as a part of transaction and if one fails it Rolled back to old state. One question In some examples I have seen @Transactional on entity java classes. What's their purpose?

[@Javatechie]

Why on entity level . i am not sure it really follow transaction support or not ?

[@vengateshm2122]

@@Javatechie seems it should not be used at entity level rather in method level in repo layer. I saw this one of the you tube content, so asked. Thanks a lot for replying.

[@kvkchaitanya5517]

can we pay the money first , then save the passenger info with payment Id? If so, how do we rollback the payment if we fail to issue ticket.?

[@Javatechie]

It doesn't seems correct usecase . Will you ever pay first before check the product

[@kvkchaitanya5517]

@@Javatechie thanks for clarifying.

[@AmritAgarwal07]

How to rollback for particular exception only

[@Javatechie]

Just Define rollback attribute inside @Transactional annotation and specify exception class

[@RaviVerma-bg6ul]

sir, how do we maintain Transaction in Microservices?

[@Javatechie]

Using saga design pattern you can checkout my microservice design pattern playlist Reference kzbin.info/www/bejne/bICYmn1thbCIntU

[@GodOfDeathShiva]

Amazing Videos, its very helpful, Thanks a lot, Kindly please provide core Java video with example projects.

[@nguyenquan4836]

Thank you so much!!!

[@biswaranjandas3275]

What if i have list of records to load and im trying to to load one by one but inbetween for one record i will get exception... Then how to handle this?

[@Javatechie]

Transaction is usually not recommended for get or fetch scenario

[@biswaranjandas3275]

@@Javatechie Translation? If i want to put Transactional for list of user to load.. and if for one iteration i found that user invalid then any of the user should not be load.. that is my problem statement

[@martinmiloshev241]

Amazing!

[@ANKITCHOUDHARYankitkrchy]

Brilliant

[@mallikarjun-shurpali9698]

Great Content SIr..

[@bholenathshivaya241]

please do make new video on propagation next video

[@Javatechie]

I will vinod

[@Kiran08357]

Just Awesome !! Simple and clear

[@Mahmudulhasan-ts5hm]

nice video, looking forward to related to isolation, propagation, rollback in details

[@niteeshchandanshire4381]

Sir please can you share video of propogation and isolation parameters in @transactional annotation

[@JaniSyed-ne1zj]

Really great Job, thanks a lot for explaining @Transactional in a simple way. Please share other topics related @Transactional. Thank you once again.

[@Bharat60425]

Great tutorial as always... just one query what makes a difference between creating end-point in the SpringBoot client class rather then creating a separate controller for it, I understand as for sake of simplicity of this tutorial you just created that end-point in the client class having main function, but what else we can define in the SpringBoot main class? can't thank you enough for your valuable content.

[@Javatechie]

Usually we shouldn't write anything on spring boot main class it should always consider as app luncher

[@tanaykamath1415]

Great video!!

[@gamec6289]

Thank you sir

[@shagunmathur7611]

Intereseted in knowing about Isolation and Propagation.

[@azimrahman3584]

Thank you sir and batch processing lecture uploaded sir in jdbc too or is it sufficient for transaction purpose in Java?

[@adepunithish5840]

Sir before moving into code , explain the flow with full picture .thanks in advance

[@divinity5250]

Awesome super video!! More subscribers on the way ✨

[@manojbhale6081]

Nice Explanation sir Please sir make more videos on spring Transaction why use like isolation,propagation

[@subhamchoudhury8363]

Thank you Sir

[@sachinjadhav5706]

Thank you🙏🙏

[@Surya_Glimpse389]

Extraordinary explanation sir continue the isolation and propagation as said we are interest thank you

[@programmingwithnish483]

thanks bro

[@sujitkumar2196]

Its a very basic and very good explanation...thanks

[@niteshnaik6992]

It was very helpful... thankyou so much❤️

[@prajyotlawande193]

Please go in depth with examples for isolation and propagation levels 👍🏼

[@ravi77235]

thanks Sir

[@amitdey789]

This is very good content, to the point and crisp.. keep up the good work and you will receive many blessings