How to configure service

Hallo,

I'd like to configure service developed by myself with properties. I mean properties like iViews have. To make things clear - in portalapp.xml for iView (component):

<components>
    <component name="TestClass">
      <component-config>
        <property name="ClassName" value="com.sap.pct.TestClass"/>
      </component-config>
      <component-profile>
        .. there are properties ...
      <component-profile/>
    </component>
</components>

Is something similar possible in service tag? And where I can configure these properties in portal after deployment?

Best regards,

Josef Motl