may MarkupContext in UpdateResponse contain no elements.

["Richard Jacob" <richard.jacob@de.ibm.com>]

Andre,

when testing the Citric producer I  noticed that when I click on the action
link and invoke performBlockingInteraction() with "cloneBeforeWrite" set,
the citrix producer returns a new portletContext and a new MarkupContext.
However the MarkupContext contains no elements at all.
We check if MarkupContext is being returned and cache it so we don't need
to call getMarkup here.
But since there is no content finally nothing is displayed.

I think from the specs point of view if MarkupContext is returned it has to
contain some data:
1. usedCachedMarkup should be there (if the producer want to refer to the
consumers cache contents)
1a. if useCachedMarkup is not set, the default is set to "false"
2. in case of useCachedMarkup=false, either markupString or markupBinary
have to appear.
2a. we agreed that one could interpret the spec that there is simply an
"empty Markup" if none of markupString or markupBinary appears. In this
case the consumer displays an empty markup.

So here we interpret the MarkupContext the citrix producer returns as an
"empty markup" returned and therefor do not call getMarkup() after
performBlockingInteraction().

Here is the message:

==============
Listen Port: 8083
Target Host: andrek.dyndns.org
Target Port: 80
==== Request ====
POST /NETlets/NETlet_Markup.asmx HTTP/1.0
Content-Type: text/xml; charset=utf-8
Accept: application/soap+xml, application/dime, multipart/related, text/*
User-Agent: Axis/1.1
Host: localhost:8083
Cache-Control: no-cache
Pragma: no-cache
SOAPAction: "urn:oasis:names:tc:wsrp:v1:performBlockingInteraction"
Content-Length: 1949
Cookie: ASP.NET_SessionId=2v1kea45zfthlq55ve0iwp45

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi
="http://www.w3.org/2001/XMLSchema-instance">
  <soapenv:Body>
    <performBlockingInteraction xmlns="urn:oasis:names:tc:wsrp:v1:types">
      <registrationContext>
        <registrationHandle>uri:NETlet:IBM WSRP4J Proxy
Portlet.oUVhPNlijPNe7m3PlVZDb9eJsmY=</registrationHandle>
      </registrationContext>
      <portletContext>
        <portletHandle>uri:NETlet:portlet:Main</portletHandle>
      </portletContext>
      <runtimeContext>
        <userAuthentication>wsrp:none</userAuthentication>
        <portletInstanceKey>Citrix_row_col1_p0</portletInstanceKey>
        <namespacePrefix>Pluto_Citrix_row_col1_p0_</namespacePrefix>
        <sessionID>sid.7c9c3xlraHPJ5MQtKMGSoYcrT_Q=</sessionID>
      </runtimeContext>
      <userContext>
        <userContextKey>dummyUserContextKey</userContextKey>
      </userContext>
      <markupParams>
        <secureClientCommunication>false</secureClientCommunication>
        <locales>en</locales>
        <locales>de</locales>
        <mimeTypes>text/html</mimeTypes>
        <mode>wsrp:view</mode>
        <windowState>wsrp:normal</windowState>
        <clientData>
          <userAgent>IBM WSRP4J ProxyPortlet.0.042</userAgent>
        </clientData>
        <navigationalState>render1</navigationalState>
        <markupCharacterSets>UTF-8</markupCharacterSets>
        <validNewModes>wsrp:view</validNewModes>
        <validNewModes>wsrp:help</validNewModes>
        <validNewModes>wsrp:edit</validNewModes>
        <validNewWindowStates>wsrp:normal</validNewWindowStates>
        <validNewWindowStates>wsrp:maximized</validNewWindowStates>
        <validNewWindowStates>wsrp:minimized</validNewWindowStates>
      </markupParams>
      <interactionParams>
        <portletStateChange>cloneBeforeWrite</portletStateChange>
        <interactionState>action1</interactionState>
      </interactionParams>
    </performBlockingInteraction>
  </soapenv:Body>
</soapenv:Envelope>
==== Response ==== HTTP/1.0 200 OK
Via: HTTP/1.1 ips-ehni-c.ehningen.de.ibm.com (IBM-PROXY-WTE), 1.1 JACOBTP.
Server: Microsoft-IIS/5.1
Date: Tue, 15 Jul 2003 20:31:40 GMT
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
Cache-Control: private, max-age=0
Content-Type: text/xml; charset=utf-8
Content-Length: 886

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd
="http://www.w3.org/2001/XMLSchema">
  <soap:Header>
    <wsu:Timestamp xmlns:wsu
="http://schemas.xmlsoap.org/ws/2002/07/utility">
      <wsu:Created>2003-07-15T20:31:40Z</wsu:Created>
      <wsu:Expires>2003-07-15T20:36:40Z</wsu:Expires>
    </wsu:Timestamp>
  </soap:Header>
  <soap:Body>
    <performBlockingInteractionResponse xmlns
="urn:oasis:names:tc:wsrp:v1:types">
      <updateResponse>
        <sessionContext>
          <sessionID>sid.7c9c3xlraHPJ5MQtKMGSoYcrT_Q=</sessionID>
          <expires>-1</expires>
        </sessionContext>
        <portletContext>

<portletHandle>uri:NETlet:portlet:Main.gZ3cPW4RTP2j7a4Oa4M2t+AIBOE
=</portletHandle>
        </portletContext>
        <markupContext />
        <navigationalState>a1</navigationalState>
      </updateResponse>
    </performBlockingInteractionResponse>
  </soap:Body>
</soap:Envelope>
==============

Mit freundlichen Gruessen / best regards,

        Richard Jacob
______________________________________________________
IBM Lab Boeblingen, Germany
Dept.8288, WebSphere Portal Server Development
Phone: ++49 7031 16-3469  -  Fax: ++49 7031 16-4888
Email: mailto:richard.jacob@de.ibm.com