An example of symfony2 forms as services

forms.xml

<parameters>
   <parameter key="my_bundle.my_model.form.type.class">My\Bundle\RestBundle\Form\Type\MyModelFormType</parameter>
        <parameter key="my_bundle.my_model.form.handler.class">My\Bundle\RestBundle\Form\Handler\MyModelFormHandler</parameter>
</parameters>

<services>
   <service id="my_bundle.my_model.form.type" class="%my_bundle.my_model.form.type.class%"/>
    <service id="my_bundle.my_model.form" factory-method="create" factory-service="form.factory" class="Symfony\Component\Form\Form">
        <argument type="service" id="my_bundle.my_model.form.type"/>
    </service>
    <service id="my_bundle.my_model.form.handler" class="%my_bundle.my_model.form.handler.class%" scope="request">
        <argument type="service" id="request"/>
        <argument type="service" id="my_bundle.my_model.form"/>
        <argument type="service" id="my_bundle.my_model.manager"/>
    </service>
</services>