Question

Typical XML for hooking up a transaction manager in Spring looks like:

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

<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
    .... properties go here ....
</bean>

How do I accomplish the same thing with code?

@Configuration
public class MyConfig {
  @Bean
  public DataSource myDataSource() {
       return new DataSource(); /// and set properties, etc.
  }

  @Bean
  public DataSourceTransactionManager txManager() {
       --> What goes here? <--
  }
}

Specifically, how do I get txManager wired up to the myDataSource singleton via code?

Answer 1

Since DataSourceTransactionManager has a constructor that takes DataSource, you can do the following (otherwise you would need to call setDataSource()):

@Bean   
public DataSourceTransactionManager txManager() {
    return new DataSourceTransactionManager(myDataSource());
}

See also:

• 3.11.4.2 Injecting dependencies