I want to configure Spring Boot to use 2 JNDI datasources. I tried this configuration:
application.properties
spring.production.datasource.jndi-name=java:/global/production_gateway
spring.production.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.production.datasource.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
spring.production.datasource.jpa.show-sql = true
spring.production.datasource.jpa.hibernate.ddl-auto = update
spring.warehouse.datasource.jndi-name=java:/global/production_warehouse
spring.warehouse.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.warehouse.datasource.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
spring.warehouse.datasource.jpa.show-sql = true
spring.warehouse.datasource.jpa.hibernate.ddl-auto = update
primary database
#Configuration
#EnableJpaRepositories(
basePackages = "org.datalis.plugin.production.entity",
entityManagerFactoryRef = "productionEntityManagerFactory",
transactionManagerRef = "productionTransactionManager"
)
#EnableTransactionManagement
public class ContextProductionDatasource {
#Primary
#Bean(name = "productionDataSourceProperties")
#ConfigurationProperties(prefix="spring.production.datasource")
public JndiPropertyHolder productionDataSourceProperties() {
return new JndiPropertyHolder();
}
#Primary
#Bean(name = "productionDataSource")
#ConfigurationProperties(prefix="spring.production.datasource")
public DataSource productionDataSource() {
JndiDataSourceLookup dataSourceLookup = new JndiDataSourceLookup();
DataSource dataSource = dataSourceLookup.getDataSource(productionDataSourceProperties().getJndiName());
return dataSource;
}
#Primary
#Bean(name = "productionEntityManager")
public EntityManager productionEntityManager(EntityManagerFactory emf) {
return emf.createEntityManager();
}
#Primary
#Bean(name = "productionEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean productionEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("hibernate.hbm2ddl.auto", "update");
return builder
.dataSource(productionDataSource())
.packages("org.datalis.plugin.production.entity")
.persistenceUnit("production")
.properties(properties)
.build();
}
#Primary
#Bean(name = "productionTransactionManager")
public PlatformTransactionManager productionTransactionManager(final EntityManagerFactory emf) {
final JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
#Primary
#Bean(name = "productionExceptionTranslation")
public PersistenceExceptionTranslationPostProcessor productionExceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
private static class JndiPropertyHolder {
private String jndiName;
public String getJndiName() {
return jndiName;
}
public void setJndiName(String jndiName) {
this.jndiName = jndiName;
}
}
}
second datasource:
#Configuration
#EnableJpaRepositories(
basePackages = "org.datalis.plugin.warehouse.entity",
entityManagerFactoryRef = "warehouseEntityManagerFactory",
transactionManagerRef = "warehouseTransactionManager"
)
#EnableTransactionManagement
public class ContextWarehouseDatasource {
#Bean(name = "warehouseDataSourceProperties")
#ConfigurationProperties(prefix="spring.warehouse.datasource")
public JndiPropertyHolder warehouseDataSourceProperties() {
return new JndiPropertyHolder();
}
#Bean(name = "warehouseDataSource")
#ConfigurationProperties(prefix="spring.warehouse.datasource")
public DataSource warehouseDataSource() {
JndiDataSourceLookup dataSourceLookup = new JndiDataSourceLookup();
DataSource dataSource = dataSourceLookup.getDataSource(warehouseDataSourceProperties().getJndiName());
return dataSource;
}
#Bean(name = "warehouseEntityManager")
public EntityManager warehouseEntityManager(EntityManagerFactory emf) {
return emf.createEntityManager();
}
#Bean(name = "warehouseEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean warehouseEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("hibernate.hbm2ddl.auto", "update");
return builder
.dataSource(warehouseDataSource())
.packages("org.datalis.plugin.warehouse.entity")
.persistenceUnit("warehouse")
.properties(properties)
.build();
}
#Bean(name = "warehouseTransactionManager")
public PlatformTransactionManager warehouseTransactionManager(final EntityManagerFactory emf) {
final JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
#Bean(name = "warehouseExceptionTranslation")
public PersistenceExceptionTranslationPostProcessor warehouseExceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
private static class JndiPropertyHolder {
private String jndiName;
public String getJndiName() {
return jndiName;
}
public void setJndiName(String jndiName) {
this.jndiName = jndiName;
}
}
}
When I deploy the code I get exception:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
Full error stack:
https://pastebin.com/bBZPZGfu
Do you know how I can solve this issue?
When I remove:
#Primary
#Bean(name = "productionEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean productionEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("hibernate.hbm2ddl.auto", "update");
return builder
.dataSource(productionDataSource())
.packages("org.datalis.plugin.production.entity")
.persistenceUnit("production")
.properties(properties)
.build();
}
The package is properly deployed. Any idea why?
The main problem is to have 2 different Entity managers, which access different databases.
So the cause of the exception: Spring Data JPA tries to create a set of repositories but does not know which entity manager factory to use. By default, Spring Data JPA expects only one Entity manager factory bean, preferably named entityManagerFactory, but you do not have such.
So you have to be really precise in configuration: for example, you can organize your code in 2 packages: ...warehouse.* and app.production.*, then you can specify a precise configuration of Spring Data JPA: #EnableJpaRepositories(basePackages = "...warehouse.**", entityManagerFactoryRef = "warehouseEntityManagerFactory") and for production #EnableJpaRepositories(basePackages = "...production.**", entityManagerFactoryRef = "productionEntityManagerFactory").
The second step is to ensure that no default Data JPA instantiation is done: adding the configuration property spring.data.jpa.repositories.enabled=false will resolve this.
And looking through the configuration disable any kind of other #EnableJpaRepositories or #EntityScan except defined above precise configurations.
And during creation of LocalContainerEntityManagerFactoryBean do not use injected EntityManagerFactoryBuilder: dead simple new LocalContainerEntityManagerFactoryBean() will work better.
And last but not least, related to application in general: you have to think about 2-phase commit transactions: you have 2 data sources, which can be accessed within single transactions but each of them is managed by different transaction managers.
Put annotation #ConfigurationProperties("spring.datasource") on you datasource definitions, e.g. warehouseDataSource() and productionDataSource()
Eek! I'd advise following the database per microservice pattern and changing your solution/architecture to have one microservice with a production micro db, and one microservice with a warehouse micro db!
As of Spring ORM v1.4 org.springframework.boot.orm.jpa.EntityScan was deprecated in favor of org.springframework.boot.autoconfigure.domain.EntityScan.
I was going to remove deprecated annotation in favor of new one, but such replacement cause IllegalStateException:
Caused by: java.lang.IllegalStateException: No persistence units parsed from {classpath*:META-INF/persistence.xml}
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainDefaultPersistenceUnitInfo(DefaultPersistenceUnitManager.java:680) ~[spring-orm-4.3.5.RELEASE.jar:4.3.5.RELEASE]
With org.springframework.boot.orm.jpa.EntityScan annotation, application starts and works correctly.
Here is my config:
#Configuration
#EntityScan("com.app.domain")
#EnableJpaRepositories("com.app.persistence.jpa")
public class JpaInfrastructureConfig {
// ... config props
#Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driverName);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
entityManagerFactory.setJpaVendorAdapter(vendorAdapter);
entityManagerFactory.setDataSource(dataSource());
entityManagerFactory.setJpaProperties(new Properties() {{
put("hibernate.dialect", hibernateDialect);
put("hibernate.show_sql", hibernateShowSql);
put("hibernate.hbm2ddl.auto", hibernateHbm2ddl);
}});
return entityManagerFactory;
}
#Bean
public JpaTransactionManager transactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
return transactionManager;
}
// ...
}
It seams that I've missed something, haven't I?
If you take a look at this issue on Spring Boot's issue tracker, you'll find the behaviour changes with the new annotation, as now documented in the release notes.
In your example, the simplest change would be to add a line to call LocalContainerEntityManagerFactoryBean.setPackagesToScan(…), as suggested in the release notes.
i want to use two data source in spring boot app like for some table i want to use h2 and for some use mysql using jpa hibernate.
in my application.java what i m doing is..
#Bean
#Primary
#ConfigurationProperties(prefix="datasource.primary")
public DataSource primaryDataSource() {
System.out.println(list+"============");
return DataSourceBuilder.create().build();
}
#Bean
#ConfigurationProperties(prefix="datasource.secondary")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
#Bean(name = "entityManagerFactory")
#Primary
public LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
return builder
.dataSource(primaryDataSource())
.packages("com.opallios.ode.model")
.persistenceUnit("primary")
.properties(buildProperties())
.build();
}
#Bean(name = "secondaryEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean secondaryEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
return builder
.dataSource(secondaryDataSource())
.packages("com.opallios.ode.model")
.persistenceUnit("secondary")
.properties(buildProperties())
.build();
}
private Map<String, Object> buildProperties() {
// This is usually set by HibernateJpaAutoConfiguration
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("hibernate.ejb.naming_strategy",
ImprovedNamingStrategy.class.getName());
return properties;
}
#Bean
#Autowired
#Qualifier("secondaryEntityManagerFactory")
public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(emf);
return txManager;
}
#Bean
#Autowired
#Qualifier("entityManagerFactory")
public PlatformTransactionManager transactionManagerr(EntityManagerFactory emf) {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(emf);
return txManager;
}
#Bean
public ServletRegistrationBean h2servletRegistration() {
ServletRegistrationBean registration = new ServletRegistrationBean(new WebServlet());
Map<String,String> params = new HashMap<String,String>();
params.put("webAllowOthers", h2WebAllow);
registration.setInitParameters(params);
registration.addUrlMappings("/console/*");
return registration;
}enter code here
its giving exception
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'springSecurityFilterChain
i want all suggestions if any i want a simpel code in which mysql as well as h2 db can be configured and can fetch data from db .
I am setting up java config for database in my spring mvc app, and what I cannot figure out is why DataSourceInitializer bean does not get created, i.e. dataSourceInitializer method is never called.
#Configuration
#EnableJpaRepositories(basePackageClasses = {CustomerRepository.class})
#EnableTransactionManagement
public class DatabaseConfig {
#Resource
Environment environment;
#Bean
public NamedParameterJdbcTemplate jdbcTemplate(DataSource dataSource) {
return new NamedParameterJdbcTemplate(dataSource);
}
#Bean
public DataSource dataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("org.h2.Driver");
dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
dataSource.setUsername(environment.getRequiredProperty("jdbc.user"));
dataSource.setPassword(environment.getRequiredProperty("jdbc.pwd"));
return dataSource;
}
#Bean
public DataSourceInitializer dataSourceInitializer(DataSource dataSource) {
final DataSourceInitializer initializer = new DataSourceInitializer();
initializer.setDataSource(dataSource);
initializer.setDatabasePopulator(databasePopulator());
return initializer;
}
#Bean
public DatabasePopulator databasePopulator() {
ResourceDatabasePopulator databasePopulator = new ResourceDatabasePopulator();
databasePopulator.addScript(new ClassPathResource("classpath:/db/sql/create-db.sql", DatabaseConfig.class));
databasePopulator.addScript(new ClassPathResource("classpath:/db/sql/insert-data.sql", DatabaseConfig.class));
return databasePopulator;
}
#Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory);
return transactionManager;
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) throws Exception {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setPersistenceUnitName("CustomersPU");
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("com.myapp.domain");
factory.setDataSource(dataSource);
factory.setJpaProperties(jpaProperties());
return factory;
}
Properties jpaProperties() {
Properties props = new Properties();
props.put("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
props.put("hibernate.hbm2ddl.auto", "validate");
...
return props;
}
}
UPDATE: Exception that I get is
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [com/myapp/conf/DatabaseConfig.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: CustomersPU] Unable to build Hibernate SessionFactory
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at ....
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: CustomersPU] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:877)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:805)
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)
at ...
Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Schema-validation: missing table [CUSTOMERS]
at org.hibernate.tool.schema.internal.SchemaValidatorImpl.validateTable(SchemaValidatorImpl.java:67)
at org.hibernate.tool.schema.internal.SchemaValidatorImpl.doValidation(SchemaValidatorImpl.java:50)
at org.hibernate.tool.hbm2ddl.SchemaValidator.validate(SchemaValidator.java:91)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:484)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:802)
... 62 more
What I am looking for is to have it configured similar to this configuration: embedded database + special username and password + paths to schema and insertion sql files. Like described here https://github.com/JohnathanMarkSmith/HelloSpringJavaBasedJavaConfig
UPDATE
If I just use EmbeddableDatabase, then it does not allow me to define username, password and DB connection URL, which is necessary to me. The following example works, but it does not allow me to define username, password and DB connection URL.
#Bean
public DataSource dataSource() {
return new EmbeddedDatabaseBuilder()
.setType(EmbeddedDatabaseType.H2)
.addScript("classpath:/db/sql/create-db.sql")
.addScript("classpath:/db/sql/insert-data.sql")
.build();
}
How can I configure and use two data sources?
For example, here is what I have for the first data source:
application.properties
#first db
spring.datasource.url = [url]
spring.datasource.username = [username]
spring.datasource.password = [password]
spring.datasource.driverClassName = oracle.jdbc.OracleDriver
#second db ...
Application class
#SpringBootApplication
public class SampleApplication
{
public static void main(String[] args) {
SpringApplication.run(SampleApplication.class, args);
}
}
How do I modify application.properties to add another data source? How do I autowire it to be used by a different repository?
Here you go.
Add in your application.properties file:
#first db
spring.datasource.url = [url]
spring.datasource.username = [username]
spring.datasource.password = [password]
spring.datasource.driverClassName = oracle.jdbc.OracleDriver
#second db ...
spring.secondDatasource.url = [url]
spring.secondDatasource.username = [username]
spring.secondDatasource.password = [password]
spring.secondDatasource.driverClassName = oracle.jdbc.OracleDriver
Add in any class annotated with #Configuration the following methods:
#Bean
#Primary
#ConfigurationProperties(prefix="spring.datasource")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
#Bean
#ConfigurationProperties(prefix="spring.secondDatasource")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
Update 2022-05-29 with Spring Boot 1.5.8.RELEASE which should work with Spring Boot 2.x
Most answers do not provide how to use them (as datasource itself and as transaction), only how to config them.
Moreover you should know how to commit/rollback transactions of both datasources at the same time.
You can see the runnable example and some explanation in https://github.com/surasint/surasint-examples/tree/master/spring-boot-jdbi/10_spring-boot-two-databases (see what you can try in README.txt)
I copied some code here.
First you have to set application.properties like this
#Database
database1.datasource.url=jdbc:mysql://localhost/testdb
database1.datasource.username=root
database1.datasource.password=root
database1.datasource.driver-class-name=com.mysql.jdbc.Driver
database2.datasource.url=jdbc:mysql://localhost/testdb2
database2.datasource.username=root
database2.datasource.password=root
database2.datasource.driver-class-name=com.mysql.jdbc.Driver
Then define them as providers (#Bean) like this:
#Bean(name = "datasource1")
#ConfigurationProperties("database1.datasource")
#Primary
public DataSource dataSource(){
return DataSourceBuilder.create().build();
}
#Bean(name = "datasource2")
#ConfigurationProperties("database2.datasource")
public DataSource dataSource2(){
return DataSourceBuilder.create().build();
}
Note that I have #Bean(name="datasource1") and #Bean(name="datasource2"), then you can use it when we need datasource as #Qualifier("datasource1") and #Qualifier("datasource2") , for example
#Qualifier("datasource1")
#Autowired
private DataSource dataSource;
If you do care about transaction, you have to define DataSourceTransactionManager for both of them, like this:
#Bean(name="tm1")
#Autowired
#Primary
DataSourceTransactionManager tm1(#Qualifier ("datasource1") DataSource datasource) {
DataSourceTransactionManager txm = new DataSourceTransactionManager(datasource);
return txm;
}
#Bean(name="tm2")
#Autowired
DataSourceTransactionManager tm2(#Qualifier ("datasource2") DataSource datasource) {
DataSourceTransactionManager txm = new DataSourceTransactionManager(datasource);
return txm;
}
Then you can use it like
#Transactional //this will use the first datasource because it is #primary
or
#Transactional("tm2")
The most important part, which you will hardly find an example in anywhere: if you want a method to commit/rollback transactions of both databases, you need ChainedTransactionManager for tm1 and tm2 , like this:
#Bean(name = "chainedTransactionManager")
public ChainedTransactionManager getChainedTransactionManager(#Qualifier ("tm1") DataSourceTransactionManager tm1, #Qualifier ("tm2") DataSourceTransactionManager tm2){
return new ChainedTransactionManager(tm1, tm2);
}
To use it, add this annotation in a method #Transactional(value="chainedTransactionManager") for example
#Transactional(value="chainedTransactionManager")
public void insertAll() {
UserBean test = new UserBean();
test.setUsername("username" + new Date().getTime());
userDao.insert(test);
userDao2.insert(test);
}
This should be enough. See example and detail in the link above.
Refer the official documentation
Creating more than one data source works same as creating the first one. You might want to mark one of them as #Primary if you are using the default auto-configuration for JDBC or JPA (then that one will be picked up by any #Autowired injections).
#Bean
#Primary
#ConfigurationProperties(prefix="datasource.primary")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
#Bean
#ConfigurationProperties(prefix="datasource.secondary")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
I also had to setup connection to 2 datasources from Spring Boot application, and it was not easy - the solution mentioned in the Spring Boot documentation didn't work. After a long digging through the internet I made it work and the main idea was taken from this article and bunch of other places.
The following solution is written in Kotlin and works with Spring Boot 2.1.3 and Hibernate Core 5.3.7. Main issue was that it was not enough just to setup different DataSource configs, but it was also necessary to configure EntityManagerFactory and TransactionManager for both databases.
Here is config for the first (Primary) database:
#Configuration
#EnableJpaRepositories(
entityManagerFactoryRef = "firstDbEntityManagerFactory",
transactionManagerRef = "firstDbTransactionManager",
basePackages = ["org.path.to.firstDb.domain"]
)
#EnableTransactionManagement
class FirstDbConfig {
#Bean
#Primary
#ConfigurationProperties(prefix = "spring.datasource.firstDb")
fun firstDbDataSource(): DataSource {
return DataSourceBuilder.create().build()
}
#Primary
#Bean(name = ["firstDbEntityManagerFactory"])
fun firstDbEntityManagerFactory(
builder: EntityManagerFactoryBuilder,
#Qualifier("firstDbDataSource") dataSource: DataSource
): LocalContainerEntityManagerFactoryBean {
return builder
.dataSource(dataSource)
.packages(SomeEntity::class.java)
.persistenceUnit("firstDb")
// Following is the optional configuration for naming strategy
.properties(
singletonMap(
"hibernate.naming.physical-strategy",
"org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl"
)
)
.build()
}
#Primary
#Bean(name = ["firstDbTransactionManager"])
fun firstDbTransactionManager(
#Qualifier("firstDbEntityManagerFactory") firstDbEntityManagerFactory: EntityManagerFactory
): PlatformTransactionManager {
return JpaTransactionManager(firstDbEntityManagerFactory)
}
}
And this is config for second database:
#Configuration
#EnableJpaRepositories(
entityManagerFactoryRef = "secondDbEntityManagerFactory",
transactionManagerRef = "secondDbTransactionManager",
basePackages = ["org.path.to.secondDb.domain"]
)
#EnableTransactionManagement
class SecondDbConfig {
#Bean
#ConfigurationProperties("spring.datasource.secondDb")
fun secondDbDataSource(): DataSource {
return DataSourceBuilder.create().build()
}
#Bean(name = ["secondDbEntityManagerFactory"])
fun secondDbEntityManagerFactory(
builder: EntityManagerFactoryBuilder,
#Qualifier("secondDbDataSource") dataSource: DataSource
): LocalContainerEntityManagerFactoryBean {
return builder
.dataSource(dataSource)
.packages(EntityFromSecondDb::class.java)
.persistenceUnit("secondDb")
.build()
}
#Bean(name = ["secondDbTransactionManager"])
fun secondDbTransactionManager(
#Qualifier("secondDbEntityManagerFactory") secondDbEntityManagerFactory: EntityManagerFactory
): PlatformTransactionManager {
return JpaTransactionManager(secondDbEntityManagerFactory)
}
}
The properties for datasources are like this:
spring.datasource.firstDb.jdbc-url=
spring.datasource.firstDb.username=
spring.datasource.firstDb.password=
spring.datasource.secondDb.jdbc-url=
spring.datasource.secondDb.username=
spring.datasource.secondDb.password=
Issue with properties was that I had to define jdbc-url instead of url because otherwise I had an exception.
p.s.
Also you might have different naming schemes in your databases, which was the case for me. Since Hibernate 5 does not support all previous naming schemes, I had to use solution from this answer - maybe it will also help someone as well.
Here is the Complete solution
#First Datasource (DB1)
db1.datasource.url: url
db1.datasource.username:user
db1.datasource.password:password
#Second Datasource (DB2)
db2.datasource.url:url
db2.datasource.username:user
db2.datasource.password:password
Since we are going to get access two different databases (db1, db2), we need to configure each data source configuration separately like:
public class DB1_DataSource {
#Autowired
private Environment env;
#Bean
#Primary
public LocalContainerEntityManagerFactoryBean db1EntityManager() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(db1Datasource());
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;
}
}
Second Datasource :
public class DB2_DataSource {
#Autowired
private Environment env;
#Bean
public LocalContainerEntityManagerFactoryBean db2EntityManager() {
LocalContainerEntityManagerFactoryBean em
= new LocalContainerEntityManagerFactoryBean();
em.setDataSource(db2Datasource());
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;
}
}
Here you can find the complete Example on my blog :
Spring Boot with Multiple DataSource Configuration
# Here '1stDB' is the database name
spring.datasource.url=jdbc:mysql://localhost/A
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# Here '2ndDB' is the database name
spring.second-datasourcee.url=jdbc:mysql://localhost/B
spring.second-datasource.username=root
spring.second-datasource.password=root
spring.second-datasource.driver-class-name=com.mysql.jdbc.Driver
#Bean
#Primary
#ConfigurationProperties(prefix = "spring.datasource")
public DataSource firstDataSource() {
return DataSourceBuilder.create().build();
}
#Bean
#ConfigurationProperties(prefix = "spring.second-datasource")
public DataSource secondDataSource() {
return DataSourceBuilder.create().build();
}
My requirement was slightly different but used two data sources.
I have used two data sources for same JPA entities from same package. One for executing DDL at the server startup to create/update tables and another one is for DML at runtime.
The DDL connection should be closed after DDL statements are executed, to prevent further usage of super user previlleges anywhere in the code.
Properties
spring.datasource.url=jdbc:postgresql://Host:port
ddl.user=ddluser
ddl.password=ddlpassword
dml.user=dmluser
dml.password=dmlpassword
spring.datasource.driver-class-name=org.postgresql.Driver
Data source config classes
//1st Config class for DDL Data source
public class DatabaseDDLConfig {
#Bean
public LocalContainerEntityManagerFactoryBean ddlEntityManagerFactoryBean() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
PersistenceProvider persistenceProvider = new
org.hibernate.jpa.HibernatePersistenceProvider();
entityManagerFactoryBean.setDataSource(ddlDataSource());
entityManagerFactoryBean.setPackagesToScan(new String[] {
"com.test.two.data.sources"});
HibernateJpaVendorAdapter vendorAdapter = new
HibernateJpaVendorAdapter();
entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);
HashMap<String, Object> properties = new HashMap<>();
properties.put("hibernate.dialect",
"org.hibernate.dialect.PostgreSQLDialect");
properties.put("hibernate.physical_naming_strategy",
"org.springframework.boot.orm.jpa.hibernate.
SpringPhysicalNamingStrategy");
properties.put("hibernate.implicit_naming_strategy",
"org.springframework.boot.orm.jpa.hibernate.
SpringImplicitNamingStrategy");
properties.put("hibernate.hbm2ddl.auto", "update");
entityManagerFactoryBean.setJpaPropertyMap(properties);
entityManagerFactoryBean.setPersistenceUnitName("ddl.config");
entityManagerFactoryBean.setPersistenceProvider(persistenceProvider);
return entityManagerFactoryBean;
}
#Bean
public DataSource ddlDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
dataSource.setUrl(env.getProperty("spring.datasource.url"));
dataSource.setUsername(env.getProperty("ddl.user");
dataSource.setPassword(env.getProperty("ddl.password"));
return dataSource;
}
#Bean
public PlatformTransactionManager ddlTransactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(ddlEntityManagerFactoryBean().getObject());
return transactionManager;
}
}
//2nd Config class for DML Data source
public class DatabaseDMLConfig {
#Bean
#Primary
public LocalContainerEntityManagerFactoryBean dmlEntityManagerFactoryBean() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
PersistenceProvider persistenceProvider = new org.hibernate.jpa.HibernatePersistenceProvider();
entityManagerFactoryBean.setDataSource(dmlDataSource());
entityManagerFactoryBean.setPackagesToScan(new String[] { "com.test.two.data.sources" });
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);
entityManagerFactoryBean.setJpaProperties(defineJpaProperties());
entityManagerFactoryBean.setPersistenceUnitName("dml.config");
entityManagerFactoryBean.setPersistenceProvider(persistenceProvider);
return entityManagerFactoryBean;
}
#Bean
#Primary
public DataSource dmlDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
dataSource.setUrl(envt.getProperty("spring.datasource.url"));
dataSource.setUsername("dml.user");
dataSource.setPassword("dml.password");
return dataSource;
}
#Bean
#Primary
public PlatformTransactionManager dmlTransactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(dmlEntityManagerFactoryBean().getObject());
return transactionManager;
}
}
//Usage of DDL data sources in code.
public class DDLServiceAtStartup {
//Import persistence unit ddl.config for ddl purpose.
#PersistenceUnit(unitName = "ddl.config")
private EntityManagerFactory entityManagerFactory;
public void executeDDLQueries() throws ContentServiceSystemError {
try {
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
entityManager.createNativeQuery("query to create/update table").executeUpdate();
entityManager.flush();
entityManager.getTransaction().commit();
entityManager.close();
//Close the ddl data source to avoid from further use in code.
entityManagerFactory.close();
} catch(Exception ex) {}
}
//Usage of DML data source in code.
public class DDLServiceAtStartup {
#PersistenceUnit(unitName = "dml.config")
private EntityManagerFactory entityManagerFactory;
public void createRecord(User user) {
userDao.save(user);
}
}
#Primary annotation when used against a method like below works good if the two data sources are on the same db location/server.
#Bean(name = "datasource1")
#ConfigurationProperties("database1.datasource")
#Primary
public DataSource dataSource(){
return DataSourceBuilder.create().build();
}
#Bean(name = "datasource2")
#ConfigurationProperties("database2.datasource")
public DataSource dataSource2(){
return DataSourceBuilder.create().build();
}
If the data sources are on different servers its better to use #Component along with #Primary annotation. The following code snippet works well on two different data sources at different locations
database1.datasource.url = jdbc:mysql://127.0.0.1:3306/db1
database1.datasource.username = root
database1.datasource.password = mysql
database1.datasource.driver-class-name=com.mysql.jdbc.Driver
database2.datasource1.url = jdbc:mysql://192.168.113.51:3306/db2
database2.datasource1.username = root
database2.datasource1.password = mysql
database2.datasource1.driver-class-name=com.mysql.jdbc.Driver
#Configuration
#Primary
#Component
#ComponentScan("com.db1.bean")
class DBConfiguration1{
#Bean("db1Ds")
#ConfigurationProperties(prefix="database1.datasource")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
}
#Configuration
#Component
#ComponentScan("com.db2.bean")
class DBConfiguration2{
#Bean("db2Ds")
#ConfigurationProperties(prefix="database2.datasource1")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
}
I used mybatis - springboot 2.0 tech stack,
solution:
//application.properties - start
sp.ds1.jdbc-url=jdbc:mysql://localhost:3306/mydb?useSSL=false
sp.ds1.username=user
sp.ds1.password=pwd
sp.ds1.testWhileIdle=true
sp.ds1.validationQuery=SELECT 1
sp.ds1.driverClassName=com.mysql.jdbc.Driver
sp.ds2.jdbc-url=jdbc:mysql://localhost:4586/mydb?useSSL=false
sp.ds2.username=user
sp.ds2.password=pwd
sp.ds2.testWhileIdle=true
sp.ds2.validationQuery=SELECT 1
sp.ds2.driverClassName=com.mysql.jdbc.Driver
//application.properties - end
//configuration class
#Configuration
#ComponentScan(basePackages = "com.mypkg")
public class MultipleDBConfig {
public static final String SQL_SESSION_FACTORY_NAME_1 = "sqlSessionFactory1";
public static final String SQL_SESSION_FACTORY_NAME_2 = "sqlSessionFactory2";
public static final String MAPPERS_PACKAGE_NAME_1 = "com.mypg.mymapper1";
public static final String MAPPERS_PACKAGE_NAME_2 = "com.mypg.mymapper2";
#Bean(name = "mysqlDb1")
#Primary
#ConfigurationProperties(prefix = "sp.ds1")
public DataSource dataSource1() {
System.out.println("db1 datasource");
return DataSourceBuilder.create().build();
}
#Bean(name = "mysqlDb2")
#ConfigurationProperties(prefix = "sp.ds2")
public DataSource dataSource2() {
System.out.println("db2 datasource");
return DataSourceBuilder.create().build();
}
#Bean(name = SQL_SESSION_FACTORY_NAME_1)
#Primary
public SqlSessionFactory sqlSessionFactory1(#Qualifier("mysqlDb1") DataSource dataSource1) throws Exception {
System.out.println("sqlSessionFactory1");
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setTypeHandlersPackage(MAPPERS_PACKAGE_NAME_1);
sqlSessionFactoryBean.setDataSource(dataSource1);
SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBean.getObject();
sqlSessionFactory.getConfiguration().setMapUnderscoreToCamelCase(true);
sqlSessionFactory.getConfiguration().setJdbcTypeForNull(JdbcType.NULL);
return sqlSessionFactory;
}
#Bean(name = SQL_SESSION_FACTORY_NAME_2)
public SqlSessionFactory sqlSessionFactory2(#Qualifier("mysqlDb2") DataSource dataSource2) throws Exception {
System.out.println("sqlSessionFactory2");
SqlSessionFactoryBean diSqlSessionFactoryBean = new SqlSessionFactoryBean();
diSqlSessionFactoryBean.setTypeHandlersPackage(MAPPERS_PACKAGE_NAME_2);
diSqlSessionFactoryBean.setDataSource(dataSource2);
SqlSessionFactory sqlSessionFactory = diSqlSessionFactoryBean.getObject();
sqlSessionFactory.getConfiguration().setMapUnderscoreToCamelCase(true);
sqlSessionFactory.getConfiguration().setJdbcTypeForNull(JdbcType.NULL);
return sqlSessionFactory;
}
#Bean
#Primary
public MapperScannerConfigurer mapperScannerConfigurer1() {
System.out.println("mapperScannerConfigurer1");
MapperScannerConfigurer configurer = new MapperScannerConfigurer();
configurer.setBasePackage(MAPPERS_PACKAGE_NAME_1);
configurer.setSqlSessionFactoryBeanName(SQL_SESSION_FACTORY_NAME_1);
return configurer;
}
#Bean
public MapperScannerConfigurer mapperScannerConfigurer2() {
System.out.println("mapperScannerConfigurer2");
MapperScannerConfigurer configurer = new MapperScannerConfigurer();
configurer.setBasePackage(MAPPERS_PACKAGE_NAME_2);
configurer.setSqlSessionFactoryBeanName(SQL_SESSION_FACTORY_NAME_2);
return configurer;
}
}
Note :
1)#Primary -> #primary
2)---."jdbc-url" in properties -> After Spring Boot 2.0 migration: jdbcUrl is required with driverClassName
declaring a data source in Spring Boot application.properties
spring.datasource.company.url=jdbc:mysql://localhost/company_db?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false&allowPublicKeyRetrieval=true
spring.datasource.company.username=root
spring.datasource.company.password=root
spring.datasource.company.platform=mysql
spring.datasource.employee.url=jdbc:mysql://localhost/employee_db?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false&allowPublicKeyRetrieval=true
spring.datasource.employee.username=root
spring.datasource.employee.password=root
spring.datasource.employee.platform=mysql
use multiple data sources, we need to declare multiple beans with
different mappings within Spring's application context.
using a configuration class
#Configuration
#EnableJpaRepositories(basePackages = "com.example.multiple.datasources.entity.company",
entityManagerFactoryRef = "companyEntityManagerFactory",
transactionManagerRef = "companyTransactionManager")
public class CompanyDataSourceConfiguration {
#Bean
#ConfigurationProperties("spring.datasource.company")
public DataSourceProperties companyDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
#ConfigurationProperties("spring.datasource.company.configuration")
public DataSource companyDataSource() {
return companyDataSourceProperties().initializeDataSourceBuilder()
.type(HikariDataSource.class).build();
}
#Bean(name = "companyEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean companyEntityManagerFactory(EntityManagerFactoryBuilder builder) {
return builder.dataSource(companyDataSource()).packages(Company.class).build();
}
#Bean
public PlatformTransactionManager companyTransactionManager(
final #Qualifier("companyEntityManagerFactory") LocalContainerEntityManagerFactoryBean companyEntityManagerFactory
) {
return new JpaTransactionManager(companyEntityManagerFactory.getObject());
}
}
we need to declare one of the datasources as #Primary. This is because
EntityManagerFactoryBuilder is declared in JpaBaseConfiguration and
this class need a single data source injected.
#Configuration
#EnableJpaRepositories(basePackages = "com.example.multiple.datasources.entity.employee",
entityManagerFactoryRef = "employeeEntityManagerFactory",
transactionManagerRef = "employeeTransactionManager")
public class EmployeeDatasourceConfiguration {
#Bean
#Primary
#ConfigurationProperties("spring.datasource.employee")
public DataSourceProperties employeeDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
#Primary
#ConfigurationProperties("spring.datasource.employee.configuration")
public DataSource employeeDataSource() {
return employeeDataSourceProperties().initializeDataSourceBuilder().type(HikariDataSource.class).build();
}
#Primary
#Bean("employeeEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean employeeEntityManagerFactory(EntityManagerFactoryBuilder builder) {
return builder.dataSource(employeeDataSource()).packages(Employee.class).build();
}
#Primary
#Bean
public PlatformTransactionManager employeeTransactionManager(
final #Qualifier("employeeEntityManagerFactory") LocalContainerEntityManagerFactoryBean employeeEntityManagerFactory
) {
return new JpaTransactionManager(employeeEntityManagerFactory.getObject());
}
}