Spring boot Single entity to multiple database - spring

Question

Is it possible to save single entity to multiple Databse (DB1 and DB2) by spring boot.For example am having two MYSQL DB with same table while posting data i need to save the person details into two dbs at same .?or any other way doing spring .Already i created two db Connections if the entity are different means, I can save the data, but the entity are same means i cant able to do?
public class Person {
private Long id;
private String name;
private String city;
}
My tablesCREATE TABLEperson(
idBIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
nameVARCHAR(255) DEFAULT NULL,
cityVARCHAR(255) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB DEFAULT CHARSET=latin1
For two DBS Named as DB1 and DB2
MY Connection Config is
#Configuration
#EnableJpaRepositories(basePackages =
{"com.onlinetutorialspoint.repository.db1"},
entityManagerFactoryRef = "db1EntityManager",
transactionManagerRef = "db1TransactionManager")
public class DB1_DataSource {
#Autowired
private Environment env;
#Bean
#Primary
public LocalContainerEntityManagerFactoryBean db1EntityManager() {
LocalContainerEntityManagerFactoryBean em = new
LocalContainerEntityManagerFactoryBean();
em.setDataSource(db1Datasource());
em.setPackagesToScan(new String[]
{"com.onlinetutorialspoint.model.db1"});
em.setPersistenceUnitName("db1EntityManager");
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
HashMap<String, Object> properties = new HashMap<>();
properties.put("hibernate.dialect",
env.getProperty("hibernate.dialect"));
properties.put("hibernate.show-sql",
env.getProperty("jdbc.show-sql"));
em.setJpaPropertyMap(properties);
return em;
}
#Primary
#Bean
public DataSource db1Datasource() {
DriverManagerDataSource dataSource
= new DriverManagerDataSource();
dataSource.setDriverClassName(
env.getProperty("jdbc.driver-class-name"));
dataSource.setUrl(env.getProperty("db1.datasource.url"));
dataSource.setUsername(env.getProperty("db1.datasource.username"));
dataSource.setPassword(env.getProperty("db1.datasource.password"));
return dataSource;
}
#Primary
#Bean
public PlatformTransactionManager db1TransactionManager() {
JpaTransactionManager transactionManager
= new JpaTransactionManager();
transactionManager.setEntityManagerFactory(
db1EntityManager().getObject());
return transactionManager;
}
}
For second DB
#Configuration
#EnableJpaRepositories(basePackages =
{"com.onlinetutorialspoint.repository.db2"},
entityManagerFactoryRef = "db2EntityManager",
transactionManagerRef = "db2TransactionManager")
public class DB2_DataSource {
#Autowired
private Environment env;
#Bean
public LocalContainerEntityManagerFactoryBean db2EntityManager() {
LocalContainerEntityManagerFactoryBean em
= new LocalContainerEntityManagerFactoryBean();
em.setDataSource(db2Datasource());
em.setPackagesToScan(
new String[]{"com.onlinetutorialspoint.model.db2"});
em.setPersistenceUnitName("db2EntityManager");
HibernateJpaVendorAdapter vendorAdapter
= new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
HashMap<String, Object> properties = new HashMap<>();
properties.put("hibernate.dialect",
env.getProperty("hibernate.dialect"));
properties.put("hibernate.show-sql",
env.getProperty("jdbc.show-sql"));
em.setJpaPropertyMap(properties);
return em;
}
#Bean
public DataSource db2Datasource() {
DriverManagerDataSource dataSource
= new DriverManagerDataSource();
dataSource.setDriverClassName(
env.getProperty("jdbc.driver-class-name"));
dataSource.setUrl(env.getProperty("db2.datasource.url"));
dataSource.setUsername(env.getProperty("db2.datasource.username"));
dataSource.setPassword(env.getProperty("db2.datasource.password"));
return dataSource;
}
#Bean
public PlatformTransactionManager db2TransactionManager() {
JpaTransactionManager transactionManager
= new JpaTransactionManager();
transactionManager.setEntityManagerFactory(
db2EntityManager().getObject());
return transactionManager;
}
}
My Rest Controller
#RestController
public class CustomerController {
#Autowired
private PersonRepository personRepositorydb1;
#Autowired
private PersonRepository personRepositorydb2;
#RequestMapping("/save")
public Person savePersonDetails()
public savePersonDetails(#RequestBody Person person ){
personRepositorydb1.savePerson(person);
return personRepositorydb2.savePerson(person);
}
}
If i call two repository means its getting error the model name is already impoted
My Repository is
import com.onlinetutorialspoint.model.db1.Person;
#Repository
public interface PersonRepository extends CrudRepository<Person, Long>{
}
import com.onlinetutorialspoint.model.db2.Person;
#Repository
public interface PersonRepository extends CrudRepository<Person, Long>{
}

Answer 1

Maybe you can use the same approach in this answer
Spring Data + JPA with multiple datasources but only one set of Repositories
Here there is an example on how to use AbstractRoutingDataSource
https://www.endpoint.com/blog/2016/11/16/connect-multiple-jpa-repositories-using