Question

我正在尝试手动设置SPring Boot应用程序中的所有属性，因为我将最终使用不同的DataSource用于常规JDBC。但这是我的代码：

@Bean
@Primary
public DataSource getJpaDatasource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(hibernateConfiguration.getDriverClassName());
    dataSource.setUrl(hibernateConfiguration.getDatabaseUrl());
    dataSource.setUsername(hibernateConfiguration.getUsername());
    dataSource.setPassword(hibernateConfiguration.getPassword());
    return dataSource;
}

现在我正在使用遗留代码，需要创建实体工厂，我想将Hikari用作连接池。这是代码：

@Bean
public EntityManagerFactory getEntityManager() {
    LocalContainerEntityManagerFactoryBean localContainerEntityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
    localContainerEntityManagerFactoryBean.setDataSource(getJpaDatasource());
    HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
    localContainerEntityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);

    Map<String, String> hibernateProperties = new HashMap<>();
    hibernateProperties.put("hibernate.dialect",hibernateConfiguration.getProperties().get("hibernate.dialect"));
    hibernateProperties.put("hibernate.show-sql",hibernateConfiguration.getProperties().get("show-sql"));
    hibernateProperties.put("hibernate.format-sql",hibernateConfiguration.getProperties().get("format-sql"));
    hibernateProperties.put("hibernate.id.new_generator_mappings",hibernateConfiguration.getProperties().get("id.new_generator_mappings"));
    hibernateProperties.put("hibernate.ejb.naming_strategy",hibernateConfiguration.getProperties().get("ejb.naming_strategy"));
    hibernateProperties.put("hibernate.hikari.minimumIdle",hibernateConfiguration.getConnectionPool().get("hibernate.hikari.minimumIdle"));
    hibernateProperties.put("hibernate.hikari.maximumPoolSize", hibernateConfiguration.getConnectionPool().get("hibernate.hikari.maximumPoolSize"));
    hibernateProperties.put("hibernate.hikari.idleTimeout", hibernateConfiguration.getConnectionPool().get("hibernate.hikari.idleTimeout"));
    hibernateProperties.put("hibernate.connection.provider_class",hibernateConfiguration.getConnectionPool().get("hibernate.connection.provider_class"));

    localContainerEntityManagerFactoryBean.setJpaPropertyMap(hibernateProperties);
    localContainerEntityManagerFactoryBean.afterPropertiesSet();
    EntityManagerFactory ef = (EntityManagerFactory)localContainerEntityManagerFactoryBean.getObject();
    return ef;
}

现在没有任何东西返回null或任何东西，我只是得到这个错误：

 nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.connections.spi.ConnectionProvider]

我缺少什么想法？

修改为了让所有明显的方法脱颖而出：

是的，我可以通过mysqlWorkbench
用户名和密码正确无误。
没有连接池，我已经累了。
在第一次调用db之前，不会抛出任何错误。即“select * from users”

这就是我得到的：

Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!

这看似简单，但我无法想出这个！

Answer 1

当通过Spring手动覆盖事物时，记住你必须覆盖所有东西是很重要的。我忘了的是TransactionManager。这就是全部：

@Bean
public JpaTransactionManager jpaTransactionManager() {
    LocalContainerEntityManagerFactoryBean localContainerEntityManagerFactoryBean = this.getEntityManagerFactoryBean();
    EntityManagerFactory ef = (EntityManagerFactory)localContainerEntityManagerFactoryBean.getObject();
    JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(ef);
    return transactionManager;
}

我不知道连接池是否正常工作，但我能够从数据库中检索数据。

无法创建请求的服务[org.hibernate.engine.jdbc.connections.spi.ConnectionProvider]

1 个答案: