datasource-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
    Application context definition for PetClinic Datasource.
-->
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:jee="http://www.springframework.org/schema/jee"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/jdbc
         http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
         http://www.springframework.org/schema/jee
         http://www.springframework.org/schema/jee/spring-jee.xsd">

    <!-- ========================= DATASOURCE DEFINITION ========================= -->

    <!-- Configurer that replaces ${...} placeholders with values from a properties file -->
    <!-- (in this case, JDBC-related settings for the dataSource definition below) -->
    <context:property-placeholder location="classpath:spring/data-access.properties" system-properties-mode="OVERRIDE"/>

    <!-- DataSource configuration for the tomcat jdbc connection pool 
    See here for more details on commons-dbcp versus tomcat-jdbc: 
    http://blog.ippon.fr/2013/03/13/improving-the-performance-of-the-spring-petclinic-sample-application-part-3-of-5/-->
    <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource"
          p:driverClassName="${jdbc.driverClassName}" p:url="${jdbc.url}"
          p:username="${jdbc.username}" p:password="${jdbc.password}"/>

    <!-- Database initializer. If any of the script fails, the initialization stops. -->
    <!-- As an alternative, for embedded databases see <jdbc:embedded-database/>. -->
    <jdbc:initialize-database data-source="dataSource">
        <jdbc:script location="${jdbc.initLocation}"/>
        <jdbc:script location="${jdbc.dataLocation}"/>
    </jdbc:initialize-database>

    <beans profile="javaee" >
        <!-- JNDI DataSource for JEE environments -->
        <jee:jndi-lookup id="dataSource" jndi-name="java:comp/env/jdbc/petclinic"/>
    </beans>
</beans>