Question

我正在尝试配置两个jpa数据源，我和this example一样，每件事都很好但是可以自动完成自动配置，只需添加一个新配置而不必创建{{1手动。

LocalContainerEntityManagerFactoryBean

Answer 1

我不确定您的具体问题是什么或者您想要完成什么，但我会向您展示我是如何使用自动将Spring数据源与Spring Boot一起使用的配置功能：

为每个数据源创建配置（在单独的类中仅为了更好的阅读）：

PrimaryDbConfig.java

C:\Users\User\uabshp\bower_components\UglifyJS2\bin\uglifyjs:111
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   at Object.<anonymous> (C:\Users\User\uabshp\bower_components\UglifyJS2\bin\uglifyjs:111:6)
   at Module._compile (module.js:541:32)
   at Object.Module._extensions..js (module.js:550:10)
   at Module.load (module.js:458:32)
   at tryModuleLoad (module.js:417:12)
   at Function.Module._load (module.js:409:3)
   at Module.runMain (module.js:575:10)
   at run (bootstrap_node.js:352:7)
   at startup (bootstrap_node.js:144:9)
   at bootstrap_node.js:467:3

SecondaryDbConfig.java

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "com.aoc.dao", entityManagerFactoryRef = "entityManager", transactionManagerRef = "transactionManager")
public class PrimaryDBConfiguration {

 @Bean(name = "dataSource")      
 @Primary
 @ConfigurationProperties(prefix = "primary.datasource")
 public DataSource dataSource() {
      return DataSourceBuilder.create().build();
 }

 @PersistenceContext(unitName = "primary")   
 @Primary
 @Bean(name = "entityManager")
 public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder) {
      return builder.dataSource(dataSource())
              .persistenceUnit("primary")                 
              .packages("com.aoc.model")
              .build();
 }

}

使用它@Configuration @EnableTransactionManagement @EnableJpaRepositories(basePackages = "com.aoc.dao", entityManagerFactoryRef = "secondaryEntityManager", transactionManagerRef = "secondaryTransactionManager") public class SecondaryDBConfiguration { @Bean @ConfigurationProperties(prefix = "secondary.datasource") public DataSource secDataSource() { return DataSourceBuilder.create().build(); } @PersistenceContext(unitName = "secondary") @Bean(name = "secondaryEntityManager") public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder) { return builder.dataSource(secDataSource()) .persistenceUnit("secondary") .packages("com.aoc.siri") .build(); } @Bean(name = "secondaryTransactionManager") public PlatformTransactionManager transactionManager(EntityManagerFactoryBuilder builder) { JpaTransactionManager tm = new JpaTransactionManager(); tm.setEntityManagerFactory(entityManagerFactory(builder).getObject()); tm.setDataSource(secDataSource()); return tm; } } PersistenceContext分配每个DAO：

OneDaoImpl.java

unitName

AnotherDaoImpl.java

@Repository(value = "OneDaoImpl")
public class OneDaoImpl {

@PersistenceContext(unitName="primary")
private EntityManager manager;

public List<AplicacioMsc> getAllOne() {     
    return (List<One>) manager.createQuery("FROM ONE", One.class).getResultList();
}
}

然后在@Repository(value = "anotherDaoImpl") public class AnotherDaoImpl { @PersistenceContext(unitName = "secondary") private EntityManager manager; public List<Producte> getAllAnother() { return (List<Another>) manager.createQuery("FROM Another", Another.class).getResultList(); } }

中

src/main/resources/application.properties

您可能知道如果您使用recommended Spring Boot packages naming这些类和语言，您应该能够同时使用这两个dataSource。

具有主要自动配置的spring boot辅助数据源

1 个答案: