Question

您好我有遗留代码通过

获取其jdbc连接

DataSource.getConnection()

DataSource与Jndi名称空间有关。

假设我有一个函数来获取它的连接：

foo(){
   ...
   Connection con = DataSource.getConnection()
   ...
}

我想将这个foo方法运行到一个定义良好的spring事务中。我该怎么做？

我使用了TransactionAwareDataSourceProxy，在我进入像JPA这样的东西之前它运作良好

首先，我可以使用此配置将foo的事务与我的spring事务同步。

    <tx:annotation-driven transaction-manager="txManager"/>

    <bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations"><list><value>classpath:/db.properties</value></list></property>
    </bean>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">
         <constructor-arg ref="dbcpDataSource"/>
    </bean>

    <bean id="dbcpDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName"><value>oracle.jdbc.driver.OracleDriver</value></property>
        <property name="url"><value>jdbc:oracle:thin:@${jdbc.url}:1521:${jdbc.db}</value></property>
        <property name="username"><value>${jdbc.username}</value></property>
        <property name="password"><value>${jdbc.password}</value></property>
<!--    <property name="defaultAutoCommit"><value>true</value></property> -->
    </bean>

    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

之后，我使用LocalContainerEntityManagerFactoryBean和JpaTransactionManager进入JPA。

package setup;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;


@Configuration
@EnableJpaRepositories
public class SpringContextConfiguration {


    @Bean
    public TestsSetup testSetup(){
        return new TestsSetup();
    }

    @Bean
    public TransactionAwareDataSourceProxy dataSource(){
        TransactionAwareDataSourceProxy tp = new TransactionAwareDataSourceProxy();
        BasicDataSource ds = new BasicDataSource();
        ds.setDriverClassName("oracle.jdbc.driver.OracleDriver");
        ds.setUrl("jdbc:oracle:thin:@a.a.a.a:port:some");
        ds.setUsername("user");
        ds.setPassword("paswd");
        ds.setDefaultAutoCommit(true);
        tp.setTargetDataSource(ds);
        return tp;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter) {
        LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
        lef.setDataSource(dataSource);
        lef.setJpaVendorAdapter(jpaVendorAdapter);
        lef.setPackagesToScan("setup");
        return lef;
    }

    @Bean
    public JpaVendorAdapter jpaVendorAdapter() {
        HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
        hibernateJpaVendorAdapter.setShowSql(true);
        hibernateJpaVendorAdapter.setGenerateDdl(false);
        hibernateJpaVendorAdapter.setDatabase(Database.ORACLE);
        return hibernateJpaVendorAdapter;
    }

    @Bean
    public PlatformTransactionManager transactionManager() {
        return new JpaTransactionManager();
    }
}

现在，我的旧代码块不会与托管交易同步。我怎样才能克服这个问题。非常感谢任何工具或评论。

修改

Answer 1

将DataSource和EntityManagerFactory注入JpaTransactionManager bean。有关详情，请参阅课堂评论@ http://docs.spring.io/spring/docs/3.2.5.RELEASE/javadoc-api/org/springframework/orm/jpa/JpaTransactionManager.html。

Answer 2

上述配置实际上是正确的，并且在创建的spring事务中调用了基础遗留函数。我想念的是，在上层我需要将底层会话刷新到数据存储区。当我这样做时，遗留事务开始意识到已更改的数据，一切都运行良好，并且事务也可以回滚。

我使用以下内容将会话刷新到数据存储区：

@Autowired
PlatformTransactionManager pt;

    TransactionDefinition td = new DefaultTransactionDefinition(TransactionDefinition.PROPAGATION_MANDATORY);
    pt.getTransaction(td).flush();

如何在托管Spring事务中运行遗留代码？

2 个答案: