Setting the datasource configuration file

<bean id="mysqlDataSource" class="com.mysql.jdbc.jdbc2.optional.
MysqlConnectionPoolDataSource">
    <property name="url" value="jdbc:mysql://localhost:3306/root"/>
    <property name="user" value="root"/>
    <property name="password" value=""/>
</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.datasources.
SharedPoolDataSource" destroy-method="close">
    <property name="connectionPoolDataSource" ref="mysqlDataSource"/>
    <property name="maxActive" value="20"/>
    <property name="maxIdle" value="5"/>
    <property name="maxWait" value="-1"/>
</bean>

<service ref="dataSource" interface="javax.sql.DataSource">
    <service-properties>
         <entry key="osgi.jndi.service.name" value="jdbc/sample"/>
    </service-properties>
</service>