Since kernel 2.0.7 and 2.1, it is possible to use system properties in literal values of component configuration meta data. This makes it possible to resolve properties at runtime instead of providing a value at packaging time.

See below an example of a configuration file based on system properties:

<component>

    <key>org.exoplatform.services.database.HibernateService</key>

    <jmx-name>database:type=HibernateService</jmx-name>

    <type>org.exoplatform.services.database.impl.HibernateServiceImpl</type>

    <init-params>

        <properties-param>

            <name>hibernate.properties</name>

            <description>Default Hibernate Service</description>

            ...

            <property name="hibernate.connection.url" value="${connectionUrl}"/>

            <property name="hibernate.connection.driver_class" value="${driverClass}"/>

            <property name="hibernate.connection.username" value="${username}"/>

            <property name="hibernate.connection.password" value="${password}"/>

            <property name="hibernate.dialect" value="${dialect}"/>

            ...

        </properties-param>

    </init-params>

</component>

System properties can be set by using the -D option: java -DconnectionUrl=jdbc:hsqldb:file:../temp/data/exodb -DdriverClass=org.hsqldb.jdbcDriver in the startup commands/scripts.