主數據源中沒有名為“entityManagerFactory”的 bean

Question

我正在嘗試使用 JNDI 將 Spring Boot 配置為使用 2 個數據源：

應用程序屬性：

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

主要數據源：

@Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.production.entity", 
        entityManagerFactoryRef = "productionEntityManager", 
        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
    @PersistenceContext(unitName = "production")
    @Bean(name = "productionLocalEntityManager")
    public LocalContainerEntityManagerFactoryBean mySqlEntityManagerFactory(EntityManagerFactoryBuilder builder) {
         return  builder.dataSource(productionDataSource()).persistenceUnit("production").packages("org.datalis.plugin.production.entity").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;
        }
    }
}

我嘗試以這種方式使用實體管理器：

@Service
@Transactional(value = "productionEntityManager")
public class ..... {

    @PersistenceContext(unitName = "production")
    private EntityManager entityManager;
}

但是在部署過程中出現錯誤：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available

你知道我的配置錯在哪里嗎？

Answer 1

您似乎缺少EntityManagerFactory的 bean。 你在這里請求它：

public EntityManager productionEntityManager(EntityManagerFactory emf) {

嘗試添加

@Primary
@Bean(name = "productionEntityManagerFactory") 
public EntityManagerFactory productionEntityManagerFactory() {
    return Persistence.createEntityManagerFactory("production");
}