modules/core/test/rules/synapse-sendnow.xml

<synapse xmlns="http://ws.apache.org/ns/synapse">
  <engage-addressing-in/>

    <refdefine ref="ping"/>
    <refdefine ref="addressing"/>

      <define name="addressing">
        <xpath expr="//ns:text_addressing" xmlns:ns="urn:text-body">
            <header type="to" value="http://localhost:8090/axis2/services/npe"/>
            <header type="action" value="urn:synapse/sendon-addressing-engage"/>
            <sendnow/>
        </xpath>
      </define>

    <define name="ping">
        <xpath expr="//ns:text_ping" xmlns:ns="urn:text-body">
            <header type="to" value="http://localhost:8090/axis2/services/npe"/>
            <header type="action" value="urn:synapse/ping"/>
            <sendnow/>
        </xpath>
      </define>
  </synapse>