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

<component>

  ...

  <init-params>

    <value-param>

      <name>simple_param</name>

      <value>${simple_param_value}</value>

    </value-param>

    <properties-param>

      <name>properties_param</name>

      <property name="value_1" value="properties_param_value_1"/>

      <property name="value_2" value="${properties_param_value_2}"/>

    </properties-param>

    <object-param>

      <name>object_param</name>

      <object type="org.exoplatform.xml.test.Person">

        <field name="address"><string>${person_address}</string></field>

        <field name="male"><boolean>${person_male}</boolean></field>

        <field name="age"><int>${age_value}</int></field>

        <field name="size"><double>${size_value}</double></field>

      </object>

    </object-param>

  </init-params>

</component>