<bean id="myAppJdbcDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
      destroy-method="close">
      <!-- Connection properties -->
      <property name="driverClass" value="$DS{database.class}" />
      <property name="jdbcUrl" value="$DS{database.url}" />
      <property name="user" value="$DS{database.username}" />
      <property name="password" value="$DS{database.password}" />

      <!-- Pool properties -->
      <property name="minPoolSize" value="5" />
      <property name="maxPoolSize" value="20" />
      <property name="maxStatements" value="50" />
      <property name="idleConnectionTestPeriod" value="3000" />
      <property name="loginTimeout" value="300" />
   </bean>

   <bean id="myAppLocalEmf"
      class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
      <property name="persistenceUnitName" value="myapp-core" />
      <property name="dataSource" ref="myAppJdbcDataSource" />
   </bean>