Spring Boot : How to connect with multiple databases using Spring Data JPA

#springboot #multipledatabases #springdatajpa
In this video you can learn how to develop spring boot application which can connect with multiple databases using Spring Data JPA.
In the application we have configured below 2 databases.
Database-1 : Embedded H2 Database
Database-2 : MySQL Database (AWS RDS)
👉 Source Code Git Hub Link : github.com/ash...
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[@ashokit]

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[@pratikjha2742]

i can't believe there are so less views and likes on this video, soon it will cross millions

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[@Aigyan471]

I'm getting this error Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'sourceEntityManagerFactory' defined in class path resource [com/example/ecommerceh/configuration/SourceDataConfig.class]: Unsatisfied dependency expressed through method 'sourceEntityManagerFactory' parameter 0: No qualifying bean of type 'org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}

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[@musterknabe3223]

well the tutorial is missing JTA Transactions.

[@nagalakshmi991]

Sir simply superb great sir within 4 minutes' you completed. Thanqq soo much for sharing this video

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[@sasikumarramasamy4236]

Well organised content. Clear explaination steps. Gotcha in first view itself.

[@kartheeknaidu2338]

Very good explanation but username and password hard coded values how to do secret

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[@Mohamed-uf5jh]

Thanks Sir ! very clear and a good explain Wow !!!

[@ashokit]

Most welcome!

[@danielclaire882]

I tried your solution but you don't show what's in the entities package. Other classes are also hidden. Do you have a github link where we can get this code and try this? Without the link, the solution doesn't help.

[@ashokit]

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[@lukamaletic9557]

Did you get the code? I was waiting for several days, but nothing...

[@phoneix24886]

Short. Precise. To the point. Great job!

[@ashokit]

Thank you so much

[@ASIFRAZA-qt1tf]

In case of same class name , User which is defined in two different com.ashokit.read.User Another one is com.ashokit.write.User In this case database understand which User class to use

[@avonzo]

This should not work as there are conflicting names used. Same name used in the same Spring Context in multiple places. Application (Spring framework) will present an error and would not start.

[@nhv2607]

Do you have git hub link please?

[@ashokit]

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[@ADITILATKAR1]

Why @primary is used in db1 configuration class and not in db2 congratulation class

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[@kannadasankaruppaiyan1155]

Awesome bro

[@ashokit]

Thankyou...

[@eternalgaming2144]

Hello Ashok, i have a problem statement - suppose i want to use 2 rdbms database one as primary and other as backup database so if i want to persist all entities to both database and retrieve the data only from primary database via repository how to configure, can you please help.

[@ErLakhan]

Can you please highlight how Transactions would work?

[@nguyenminhhieu1295]

I have an issue, my application can not find the EntityManagerFacotyBuilder

[@ashokit]

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[@alisonwalker2419]

dataSource or dataSourceClassName or jdbcUrl is required. ??

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[@gobindasuniqueideas8247]

Not working... showing cycle dependency

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[@mayureshsohani9913]

sir can you please share code here. getting compilation errors while creating Builder object

[@ashokit]

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[@sayakrana5072]

Problem is i am able to connect using this but using connection pool i am unable to do it using jndi-name

[@ashokit]

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[@deepakpareek3014]

Ashok sir, if db1 table wants to use db2 tables or suppose to join db1 table to db2 wht would be solution for that

[@ashokit]

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[@AnubhabKundu]

You are writing in spring boot 2.x application?

[@ashokit]

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[@kalyanimvn]

Very good.and easily understand.thank yoy

[@ashokit]

You are welcome

[@rajendranaik7317]

You are the genuine Java trainer Sir. Others focusing to earn but your content is worthful

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[@SAYANTANMAITYGREEN]

Thanks.

[@ashokit]

Thank you so much

[@anandnandudkar1419]

Thanks alot!

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[@luisenriquegonzalez5130]

you are good

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[@pranitpawar9837]

Thank you

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[@Gangadharj-j2p]

can you show Respository classes ?

[@ashokit]

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[@ShashankBhattarai-g1m]

I Tried this already but what if my database is totally dynamic and i need to switch the database in runtime? For example my conn info comes from my admin table where all my clients database conn info are stored. Which ever client uses the appplication it should switch the database on runtime. I was not able to acheive this using dynamic datasource routing and stuffs. Can you help me with that ?

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