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From jma...@apache.org
Subject cvs commit: ws-site/targets/wsrp4j/arch arch.pdf consumer.html consumer.pdf arch.html producer.html producer.pdf
Date Thu, 13 Nov 2003 00:03:53 GMT
jmacna      2003/11/12 16:03:53

  Added:       targets/wsrp4j/arch arch.pdf consumer.html consumer.pdf
                        arch.html producer.html producer.pdf
  Log:
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  1.1                  ws-site/targets/wsrp4j/arch/arch.pdf
  
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  1.1                  ws-site/targets/wsrp4j/arch/consumer.html
  
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  <div align="center">
  <h1>WSRP Consumer Architecture</h1>
  </div>
  <div class="h3"> 
     
    
      
  <p>
      The Producer and Consumer are provided with a very modular
      architecture enabling an easy exchange of module implementations.
      All modules excel by interfaces based on the WSRP object model
      hiding the portal's object model and thus gaining independence of
      changes in the portal implementation or design.
      </p>
      
  <div align="center">
  <img class="figure" alt="Consumer Architecture" src="../images/consumer_architecture.jpg"></div>
      
  <div class="h3">
  <h3>Protocol Handler</h3>
  </div>
        
  <p>
        The Protocol Handler is a standalone Swing based application that
        implements the consuming portal and the browser functionality. It
        aggregates the integrated WSRP portlets and forwards all
        invocations together with relevant context and request information
        to the remote WSRP service. The Swing consumer thereby uses the
        ConsumerEnvironment to collect all data required for a WSRP call.
        </p>
      
      
  <div class="h3">
  <h3>WSRP Object Model </h3>
  </div>
        
  <p>
        Most of the WSRP object model is being generated from the WSRP
        specification's WSDL types. 
        </p>
      
      
  <div class="h3">
  <h3>PortletDriver </h3>
  </div>
        
  <p>
        The PortletDriver is the task oriented abstraction of the
        generated WSRP stubs for markup and action invocation.
        </p>
        
  <p>
        The PortletDriver is the task oriented abstraction of the
        generated WSRP stubs for markup and action invocation.
        </p>
      
      
  <div class="h3">
  <h3>WSRP service (stubs) () </h3>
  </div>
        
  <p>
        The stubs generated by the axis SOAP implementation. The stubs are
        also implementing the cookie handling - for more details see
        SessionHandler below.
        </p>
      
      
  <div class="h3">
  <h3>ProducerRegistry </h3>
  </div>
        
  <p>
        The ProducerRegistry stores and manages details about producer
        portals from which portlets were integrated or shall be
        integrated.
        </p>
      
      
  <div class="h3">
  <h3>SessionHandler </h3>
  </div>
        
  <p>
        The WSRP consumer implementation session handling is based on the
        SOAP stack's session handling. The generated SOAP stubs are doing
        the cookie handling and are caching the cookies in instance
        variables. This means that one stub object instance is equivalent
        to one HTTP session which we map to one WSRP session (initCookie
        wise). When a WSRP session did time out an InvalidCookie exception
        is being thrown and a new session must be established.
        </p>
      
      
  <div class="h3">
  <h3>URLHandler </h3>
  </div>
        
  <p>
        The URLHandler is responsible for the URL rewriting of the WSRP
        URLs embedded in the markup received from the remote portlet.
        </p>
      
      
  <div class="h3">
  <h3>PortletRegistry </h3>
  </div>
        
  <p>
        The PortletRegistry stores and provides access to WSRP specific
        data and descriptions of a remote Portlet.
        </p>
      
      
  <div class="h3">
  <h3>UserRegistry </h3>
  </div>
        
  <p>
        The UserRegistry is in the Swing consumer case very simplistic. As
        the browser is integrated there is always only one "dummy" user
        being managed.
        </p>
      
    
  
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  1.1                  ws-site/targets/wsrp4j/arch/consumer.pdf
  
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  1.1                  ws-site/targets/wsrp4j/arch/arch.html
  
  Index: arch.html
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  <h1>WSRP Architecture</h1>
  </div>
  <div class="h3"> 
     
  
  
  <p>
  The 
  <a href="http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=wsrp">OASIS WSRP</a>

  standard defines pluggable, user-facing, interactive web
  services with a common, well-defined interface and protocol for
  processing user interactions and providing presentation fragments
  suitably for aggregation by portals. WSRP standardizes web
  services at the presentation layer on top of the existing web
  services stack, builds on the existing web services standards and
  will leverage additional web services standards efforts, such as
  security efforts now underway, as they become available. The WSRP
  interfaces are defined in the Web Services Description Language
  (WSDL). In addition, WSRP defines metadata for self-description
  for publishing and finding WSRP services in registries. All WSRP
  services are required to implement a SOAP binding and optionally
  may support additional bindings.
  </p>
  
  <p>
  In the definition of the WSRP standard and the 
  <a href="http://www.jcp.org/en/jsr/detail?id=168">JSR 168</a>, 
  the OASIS Technical Committee and the JSR 168 Expert group have
  closely collaborated to make sure that that both fit together well
  in portal architectures. JSR 168 compliant portlets can be exposed
  as WSRP compliant web services and conversely, WSRP services can
  be integrated through generic portlet proxies written to the
  Portlet API (see Figure below).
  </p>
  
  <div align="center">
  <img class="figure" alt="Portal Overview" src="../images/WSRPArch1.png"></div>
  
  <p>
  The WSRP4J project provides the WSRP4J Producer, which allows
  implementing such WSRP compliant services based on a free, open
  source software stack consisting of Tomcat, Axis and WSRP4J which
  in turn includes Pluto, the JSR 168 reference implementation. In
  addition, the WSRP4J project provides a generic proxy portlet
  written to the Portlet API, the WSRP4J Consumer (see Figure
  below).
  </p>
  
  <div align="center">
  <img class="figure" alt="WSRP4J Components" src="../images/WSRPArch2.png"></div>
  
  
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  <div class="app">
  <div align="center">
  <h1>WSRP Producer Architecture</h1>
  </div>
  <div class="h3"> 
     
    
      
  <p>
      Producer and consumer are provided with a very modular
      architecture enabling an easy exchange of module implementations.
      All modules excel by interfaces based on the WSRP object model
      hiding the runtime environment's (portal's) object model
      and thus gaining independence of changes in the environment's
      implementation or design.
      </p>
      
  <div align="center">
  <img class="figure" alt="WSRP Producer Architecture" src="../images/producer_architecture.jpg"></div>
      
  <div class="h3">
  <h3>WSRPEngine</h3>
  </div>
        
  <p>
        The WSRPEngine is the WSRP implementation endpoint. This class
        must be deployed in the app server (Tomcat) as a web service.  The
        WSRPEngine implements the WSRP protocol specific ports
        (=interfaces) and does the corresponding protocol handling. There
        are four WSRP ports:
        </p>
        
  <dl>
        
  <dt>Markup</dt> 
  <dd>deals with Portlet invocation and Session handling</dd>
        
  <dt>PortletManagement</dt> 
  <dd>covers lifecycle and properties of portlets</dd>
        
  <dt>Registration</dt> 
  <dd>enables a consumer to register at the producer</dd>
        
  <dt>ServiceDescription</dt> 
  <dd>enables a consumer to discover the services that a producer provides</dd>
        
  </dl>
        
  <div class="frame note">
  <div class="label">Note</div>
  <div class="content">
        To be able to reuse Portal functionality regarding session and
        request handling when invoking a portlet the WSRPEngine must be
        able to access the HttpServletRequest.
        </div>
  </div>
      
      
  <div class="h3">
  <h3>ConsumerRegistry</h3>
  </div>
        
  <p>
        This component manages and provides access to the registered Consumers. 
        </p>
        
        
  <div class="h3">
  <h3>HandleGenerator</h3>
  </div>
        
  <p>
        This component is responsible for generating IDs / handles required
        for the WSRP protocol handling.
        </p>
        
        
  <div class="h3">
  <h3>WSRP Object Model</h3>
  </div>
        
  <p>
        The WSRP object model is being generated from the WSRP specification's WSDL types.
        </p>
      
      
  <div class="h3">
  <h3>Provider</h3>
  </div>
        
  <p>
        The Provider is the access point for the WSRPEngine to the Provider
        components which hide the provider (portal) implementation's
        components required to handle and invoke portlets. All Subcomponents
        wrap corresponding provider components and map the WSRP object model
        to the provider object model.
        </p>
      
      
  <div class="h3">
  <h3>Portlet Invoker</h3>
  </div>
        
  <p>
        The PortletInvoker wraps the Provider's invocation mechanisms and
        provides the Provider with the required environment.
        </p>
        
        
  <div class="h3">
  <h3>Description Handler</h3>
  </div>
        
  <p>
        The DescriptionHandler manages and provides the description of the
        provider regarding configuration properties like registration or
        session handling policy, etc.  It moreover provides the descriptions
        of the provided portlets depending on the registration.
        </p>
      
      
  <div class="h3">
  <h3>PortletPool</h3>
  </div>
        
  <p>
        The PortletPool manages the portlet instances and is responsible for
        the portlets' lifecycle management (clone, destroy).
        </p>
        
        
  <div class="h3">
  <h3>Portlet State Manager</h3>
  </div>
        
  <p>
        The PortletStateMananger enables a Producer to access a portlet's
        state as a blob that than can be delegate to the consumer to be stored
        on consumer side.
        </p>
      
      
  <div class="h3">
  <h3>Session Handler</h3>
  </div>
        
  <p>
        No additional session handling implementation for the Pluto provider
        is required as the session handling concept is completely HTTP
        (cookie) based and relies on consumer' cookie handling.
        </p>
      
      
  <div class="h3">
  <h3>URL Composer</h3>
  </div>
        
  <p>
        The URLComposer must be used for WSRP triggered portlet invocation to
        create WSRP URLs instead of the portal's URL handling
        implementation. Therefore the URLComposer is being used by WSRP's
        version of the DynamicInformationProvider which is being used by the
        Portlet API implementation to generate portlet URLs. There are two
        ways how URLs can be composed in a WSRP environment:
        </p>
        
  <ol>
  	
  <li>
  	Via templates that represent URLs that are valid on Consumer side and
  	contain placeholders for all portlet specific URL components.
  	</li>
  	
  <li>
  	Via URL rewriting. In that case WSRP specific URLs are being composed
  	that will have to be rewritten by the Consumer.
  	</li>
        
  </ol>
      
    
  
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