Spring Boot 2.0.0.M4 & Hibernate 5.2.11.Final 找不到 EntityManagerFactoryBuilder 类型的 bean

Question

我显然有一些配置问题，但我自己无法解决这个问题。我希望你们能帮帮我？

我发现的所有示例都没有表明必须为 EntityManagerFactoryBuilder 创建一个 bean，所以有什么问题。

我正在尝试配置完全独立的数据源，包括不同的实体管理器等。

我的错误：

---

应用程序无法启动

---

描述：

方法 entityManagerFactory 的参数 0 需要一个无法找到的“org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder”类型的 bean。

行动：

考虑在您的配置中定义一个 'org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder' 类型的 bean。

我的数据源配置

package ...;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

@Configuration
@EnableTransactionManagement
public class DataSourceConfiguration {


    @Primary
    @Bean()
    @ConfigurationProperties(prefix="spring.my.datasource")
    public DataSource myDataSource() {
        return DataSourceBuilder.create().build();
    }



    @Primary
    @Bean(name = "myEntityManager")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder factoryBuilder,
                                                                       @Qualifier("myEntityManager") DataSource bds) {
        ...
    }
}

我的应用程序

@SpringBootApplication(exclude = {
        DataSourceAutoConfiguration.class,
        HibernateJpaAutoConfiguration.class,
        JpaRepositoriesAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class
})

我的绒球

Answer 1

通过排除HibernateJpaAutoConfiguration您正在关闭创建EntityManagerFactoryBuilderbean。

默认情况下，EntityManagerFactoryBuilderbean 是由JpaBaseConfiguration#entityManagerFactoryBuilder(JpaVendorAdapter, ObjectProvider).

只有一种JpaBaseConfiguration实现 - HibernateJpaConfiguration，它在以下情况下被激活：

• 只有一名DataSource候选人（或一名被标记为@Primary）；
• HibernateJpaAutoConfiguration条件为真 - 检查HibernateJpaAutoConfiguration类。

您应该在没有构建器的情况下创建和配置 LocalContainerEntityManagerFactoryBean （就像您在自己的答案中所做的那样），或者像这样在您的配置中手动创建 EntityManagerFactoryBuilder ：

@Bean
public EntityManagerFactoryBuilder entityManagerFactoryBuilder() {
    return new EntityManagerFactoryBuilder(new HibernateJpaVendorAdapter(), new HashMap<>(), null);
}

Answer 2

回答@Albert Bos 的问题...

我想这就是干啥的吧。

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        basePackageClasses = { MyEntityRepository.class },
        repositoryBaseClass = EntityRepositoryImpl.class,
        transactionManagerRef = "myTransactionManager",
        entityManagerFactoryRef = "myEntityManagerFactory"
)
public class MyDataSourceConfiguration { ...

这是我的数据源配置。

@Bean(name = DATASOURCE_NAME + "DataSource")
public DataSource dataSource(@Qualifier(DATASOURCE_NAME + "DataSourceProperties") DataSourceProperties dataSourceProperties) 
{
    return DataSourceBuilder.create()
            .url(dataSourceProperties.getUrl())
            .username(dataSourceProperties.getUsername())
            .password(dataSourceProperties.getPassword())
            .driverClassName(dataSourceProperties.getDriverClassName())
            .build();
}

@Bean(name = DATASOURCE_NAME + "EntityManagerFactory")
@PersistenceContext(unitName = DATASOURCE_NAME + "PersistenceUnit")
public EntityManagerFactory entityManagerFactory(
        @Qualifier(DATASOURCE_NAME + "JpaProperties") Properties jpaProperties,
        @Qualifier(DATASOURCE_NAME + "DataSource") DataSource dataSource,
        @Qualifier(DATASOURCE_NAME + "JpaVendorAdapter") JpaVendorAdapter jpaVendorAdapter) 
{
    LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
    factoryBean.setDataSource(dataSource);
    factoryBean.setJpaProperties(jpaProperties);
    factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
    factoryBean.setPackagesToScan(MyEntity.class.getPackage().getName());
    factoryBean.setPersistenceUnitName(DATASOURCE_NAME + "PersistenceUnit");
    factoryBean.afterPropertiesSet();
    return factoryBean.getObject();
}

@Bean(name = DATASOURCE_NAME + "TransactionManager")
public PlatformTransactionManager transactionManager(@Qualifier(DATASOURCE_NAME + "EntityManagerFactory") EntityManagerFactory entityManagerFactory) 
{
    JpaTransactionManager txManager = new JpaTransactionManager();
    txManager.setEntityManagerFactory(entityManagerFactory);
    return txManager;
}

和应用程序配置

@SpringBootApplication(exclude = {
        LiquibaseAutoConfiguration.class,
        DataSourceAutoConfiguration.class,
        ValidationAutoConfiguration.class,
        HibernateJpaAutoConfiguration.class,
        JpaRepositoriesAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class
})