Spring Boot : How to connect with multiple databases using Spring Data JPA
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- Опубліковано 25 січ 2023
- #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)
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Well organised content. Clear explaination steps. Gotcha in first view itself.
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Very good.and easily understand.thank yoy
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Very good explanation but username and password hard coded values how to do secret
Can you please highlight how Transactions would work?
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.
Why @primary is used in db1 configuration class and not in db2 congratulation class
Problem is i am able to connect using this but using connection pool i am unable to do it using jndi-name
Ashok sir, if db1 table wants to use db2 tables or suppose to join db1 table to db2 wht would be solution for that
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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
You are writing in spring boot 2.x application?
dataSource or dataSourceClassName or jdbcUrl is required. ??
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Do you have git hub link please?
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sir can you please share code here. getting compilation errors while creating Builder object
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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.
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Did you get the code? I was waiting for several days, but nothing...
I have an issue, my application can not find the EntityManagerFacotyBuilder
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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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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.
Not working... showing cycle dependency
can you show Respository classes ?
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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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