I need to create my custom configuration for EntityManager, however I want to set all properties suitable for it from application.properties.
Here I set properties hibernate.hbm2ddl.auto and hibernate.dialect explicitly. But I don't know which properties will be passed in application.properties. They can be changed from this file.
How to get all appropriate properties from application.properties for EntityManager.
@Bean
public LocalContainerEntityManagerFactoryBean entityManager() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[] {ENTITY_TO_SCAN});
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
Map<String, Object> properties = new HashMap<>();
properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
em.setJpaPropertyMap(properties);
return em;
}
All your appropriate properties will be available in JpaProperties bean, if they are declared properly in application.properties file.
@Autowired
JpaProperties jpaProperties;
The jpa properties format should be like this.
spring.jpa.properties.hibernate.show_sql=false
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.H2Dialect
prefix spring.jpa.properties.*
Then you can update your entity manager bean like
@Bean
public LocalContainerEntityManagerFactoryBean entityManager(JpaProperties jpaProperties) {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[] {ENTITY_TO_SCAN});
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaPropertyMap(jpaProperties.getProperties());
return em;
}