java - 没有名为 'entityManagerFactory' 的可用 bean，但已设置entityManagerFactoryRef

Question

我正在尝试配置两个 H2 数据源。我尝试了十几个教程，但仍然不起作用。现在我有两个配置类

一、默认配置:

@Configuration
@EnableJpaRepositories(
    basePackages = "com.yyy.xxx.repository",
    entityManagerFactoryRef = "defaultEntityManagerFactory",
    transactionManagerRef = "defaultTransactionManager")
@EnableTransactionManagement
public class DefaultJpaConfiguration {

    private final JpaVendorAdapter jpaVendorAdapter;

    public DefaultJpaConfiguration(JpaVendorAdapter jpaVendorAdapter) {
        this.jpaVendorAdapter = jpaVendorAdapter;
    }

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

    @Bean(name = "defaultEntityManagerFactory")
    public EntityManagerFactory defaultEntityManagerFactory() {
        LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
        lef.setDataSource(defaultDataSource());
        lef.setJpaVendorAdapter(jpaVendorAdapter);
        lef.setPackagesToScan("com.yyy.xxx.entity");
        lef.setPersistenceUnitName("defaultPersistenceUnit");
        lef.afterPropertiesSet();
        return lef.getObject();
    }

    @Bean(name = "defaultTransactionManager")
    public PlatformTransactionManager defaultTransactionManager() {
        return new JpaTransactionManager(defaultEntityManagerFactory());
    }

    @Bean(name = "defaultEntityManager")
    public EntityManager defaultEntityManager() {
        return defaultEntityManagerFactory().createEntityManager();
    }

}

第二个:

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        basePackages = "com.yyy.xxx.adminPassword.repository",
        entityManagerFactoryRef = "passwordEntityManagerFactory",
        transactionManagerRef = "passwordTransactionManager")
public class PlkPasswordsDatabaseConfiguration {

    private final JpaVendorAdapter jpaVendorAdapter;

    public PlkPasswordsDatabaseConfiguration(JpaVendorAdapter jpaVendorAdapter) {
        this.jpaVendorAdapter = jpaVendorAdapter;
    }

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

    @Bean(name = "passwordEntityManagerFactory")
    public EntityManagerFactory passwordEntityManagerFactory() {
        LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
        lef.setDataSource(passwordDataSource());
        lef.setJpaVendorAdapter(jpaVendorAdapter);
        lef.setPackagesToScan("com.yyy.xxx.adminPassword.entity");
        lef.setPersistenceUnitName("passwordPersistenceUnit");
        lef.afterPropertiesSet();
        return lef.getObject();
    }

    @Bean(name = "passwordEntityManager")
    public EntityManager passwordEntityManager() {
        return passwordEntityManagerFactory().createEntityManager();
    }

    @Bean(name = "passwordTransactionManager")
    public PlatformTransactionManager passwordTransactionManager() {
        return new JpaTransactionManager(passwordEntityManagerFactory());
    }

}

属性文件:

datasource.default.url=jdbc:h2:mem:xxx_db;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false
datasource.default.username=sa
datasource.default.password=

datasource.adminPasswords.url=jdbc:h2:mem:xxx_plk_passwords_db;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false
datasource.adminPasswords.username=sa
datasource.adminPasswords.password=

我得到的错误是:

由以下原因引起:org.springframework.beans.factory.NoSuchBeanDefinitionException:没有名为“entityManagerFactory”的可用 bean

但是正如您在配置类中看到的那样，entityManagerFactoryRef 已设置。

Answer 1

当您有多个数据源、EntityManager 和 PlatformTransactionManager 时，Spring 希望您指定其中哪一个是主要数据源。在数据源、entitymanager 和 transactionmanager(无论是哪一个)bean 之一上添加 @Primary