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From Ivelin Ivanov <ive...@apache.org>
Subject [RT] WebServicesProxy Generator
Date Mon, 24 Jun 2002 03:10:59 GMT

Following is an initial draft of a new component I am starting to work on.

Fire and Ice welcome ;)


------------------------------------------------------------------------

The WebServiceProxy Cocoon generator is intended to:

1) Allow easy syndication of dynamic content as a natural extension of 
the currently popular static content syndication with RSS.

2) Allow transparent routing of web service request through GET, POST, 
SOAP-RPC and SOAP-DOC binding methods.

3) Allow almost full control through sitemap configuration.

4) Allow use of Cocoon components for content formatting, aggregation 
and styling through a tight integration with the Cocoon sitemap.

5) Require 0 (zero) lines of Java or other business logic code in most 
cases.

6) Be generic and flexible enough to allow custom extensions for 
advanced and non-typical uses.

7) Support sessions, authentication, http 1.1, https,  request 
manipulation, redirects following, connection pooling, and others.

8) Use the Jakarta HttpClient library which provides many sophisticated 
features for HTTP connections.



------------------------------------------------------------------------
Example I: Integration of the Amazon book search service in a Cocoon portal:
------------------------------------------------------------------------

pipeline:
---------

     <map:pipeline>
       <map:match pattern="amazon/searchform">
           <map:generate src="AmazonForm.xml"/>
           <map:transform src="AmazonForm2html.xsl"/>
           <map:transform 
src="context://stylesheets/xmlform/xmlform2html.xsl"/>
           <map:serialize type="html"/>
         </map:act>
       </map:match>

       <map:match pattern="amazon/search*">

           <map:generate src="http://rcm.amazon.com/e/cm{1}">
               <!-- The WebSericeProxy generator takes 3 arguments: -->
               <!-- 1) The URL of the targeted web service -->
               <!-- 2) The binding method: GET, POST, SOAP-RPC or 
SOAP-DOC -->
               <!-- 3) Optionally, name of the session to the remote 
service, which allows scoping and grouping between different sitemap 
sections. -->
               <map:parameter name="wsproxy-method" value="GET"/>
               <map:parameter name="wsproxy-session" 
value="myAmazonSession"/>
           </map:generate>

           <map:transform src="amazonform2html.xsl"/>
           <map:transform 
src="context://stylesheets/xmlform/xmlform2html.xsl"/>
           <map:serialize type="html"/>
         </map:act>
       </map:match>
     </map:pipeline>


AmazonForm.xml:
---------------

<?xml version="1.0" ?>
<document xmlns:xf="http://xml.apache.org/cocoon/xmlform/2002">
   <xf:form id="form-amazon" view="search" 
action="amazon/search?t=myAmazonId-02-20&l=st1&mode=books&p=102&o=1&f=xml">
     <xf:caption>Amazon book search by keyword</xf:caption>
     <xf:textbox ref="search">
         <xf:caption>Keywords</xf:caption>
     </xf:textbox>
     <xf:submit id="submit" class="button">
       <xf:caption>Submit</xf:caption>
     </xf:submit>
   </xf:form>
</document>


------------------------------------------------------------------------
Example II: Even more interesting.
Integration with an interactive web service - the Cocoon FeedBack Wizard.
Notice that it is actually simpler to integrate with an interactive 
service then a "single call" based one, because WebServiceProxy supports 
sessions as well !
------------------------------------------------------------------------

     <map:pipeline>
       <map:match pattern="RemoteWizard/*">
         <map:generate 
src="http://remotehost:8080/cocoon/samples/xmlform/{1}">
           <map:generate src="http://rcm.amazon.com/e/cm{1}">
               <map:parameter name="wsproxy-method" value="POST"/>
               <map:parameter name="wsproxy-session" 
value="myFeedbackWizardSession"/>
           </map:generate>
           <map:transform src="myNewStyle-wizard2html.xsl"/>
           <map:transform 
src="context://stylesheets/xmlform/xmlform2html.xsl"/>
           <map:serialize type="html"/>
         </map:act>
       </map:match>
     </map:pipeline>



------------------------------------------------------------------------
End of file
------------------------------------------------------------------------


-- 

-= Ivelin =-


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