Web Services for Interactive Applications

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Web Services for Interactive Applications

• Overview of the OASIS WSIA Technical Committee
• Charlie Wiecha, IBM T.J. Watson Research Center,
  Yorktown Hts NY
• www.oasis-open.org/committees/wsia

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WSIA Technical Committee Members

• BEA
• Bowstreet
• Cisco
• Computer Associates
• CrossWeave
• Cyclone Commerce
• Divine
• USAF/Dept of Defense
• Epicentric
• France Telecom
• Fujitsu
• HP
• IBM
• Intel
• KiNZAN
• Macromedia
• Nokia

• Peregrine Systems
• Plumtree
• Pointgain Corp
• SAP
• SeeBeyond
• Silverstream
• Sterling Commerce
• Vitria
• WebCollage

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WSIA Positioning in the Web Services standards
stack
Security / Privacy
Quality of service
Management
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The business payoff...

• Business want to distribute web applications
  through multiple distribution channels and
  multiple deployment mechanisms.
• Business want to easily create new web
  applications by leveraging a world wide pallet of
  user interface assets.

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Producers and consumers ofend-user experience
Consumers (or integrators)
Producers
Client
Application Back End Services
User Experience Services
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Producers and consumers ofend-user experience
Consumers (or integrators)
Producers
Client
Application Back End Services
User Experience Services
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WSIA Business Scenarioswww.oasis-open.org/committ
ees/wsia/scenarios/index.shtml
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Business Scenario - OEM Value Chain
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Range of service composition use cases

• Embedded
• Placing the WSIA Web Service inside a new
  container side-by-side.
• Example Stock plot applications as-is within a
  corporate portal.
• Customized
• Embedding the WSIA Web Service inside a new Web
  application, with look and feel modifications,
  adding or excluding elements, altering actions
  associated with elements, in/out data
  transferred. Provides for customization both of
  the process of generating output, and for
  handling interaction returning from the end-user.
• Example Altering the options in the navigation
  bar for the stock plot or excluding some
  elements. Customization can either be static
  (offline configuration, a typical portal
  scenario) or dynamic (a per-user or per-session
  configuration, a.k.a., personalization).

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Range of service composition use cases

• Coordinated
• Integrating the WSIA Web Service into a new Web
  application, providing in-page wiring. Note that
  the Consumer can coordinate Producer and Consumer
  elements, or coordinate between multiple
  Producers.
• Example As the user selects options in the
  Consumers customized stock plot navigation bar
  the separate WSIA plotting service is updated.
• Orchestrated
• Integrating the WSIA Web Service, while
  customizing and adapting the flow of the Web
  Service.
• Example Instead of displaying the stock plot
  standard dialog box for entering a symbol,
  provide the symbol directly from the Consumer.
• Republished
• The Consumer of the WSIA Web Service republishes
  the new experience as a new WSIA Web Service.
• Example After performing the flow changes, the
  Consumer wraps the new stock plot experience as a
  WSIA Web Service, and integrates it into
  different locations on its e-banking site (Gold
  Site, Silver Site, Standard Site).

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Embedded WSIA services
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Embedded WSIA services
Consumer
Producers
Users
WSIA Proxy
HTTP(SOAP)
WSIA Application
WSIA Runtime
WSIA Proxy
Travelers Check Application
HTTP(SOAP)
HTTP(HTML)
WSIA Application
WSIA Application
Stock Application
WSIA Runtime
WSIA Runtime
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Possible interfaces for Embedded level of WSIA
function

• Lifecycle
• createInstance
• destroyInstance
• User interaction
• getOutput
• invokeAction
• Service description
• getInterface
• hasInterface

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Customized WSIA services
Users
Consumer
Producer
Data and presentation properties
WSIA Proxy
Producer specific operations
HTTP(SOAP)
HTTP(HTML)
Stock Application
WSIA Application
WSIA Application
WSIA Runtime
WSIA Runtime
WSIA Runtime
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Possible interfaces for Customized level of
function

• Properties
• getPropertySchema
• setProperties
• getProperties
• An example of a PropertyList
• ltPropertyListgt
• ltProperty propertyLocatora/b/cgta
  stringlt/Propertygt
• ltProperty propertyLocatorf/d/e/tgt
• lt someComplexType gt
• lt/ someComplexType gt
• lt/Propertygt
• lt/PropertyListgt

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Coordinated WSIA services
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Coordinated WSIA services
Users
Consumer
Producer
WSIA Service
Data and presentation properties
WSIA Proxy
HTTP(SOAP)
HTTP(HTML)
WSIA Application
WSIA Application
WSIA Runtime
WSIA Runtime
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WSIA Control Component

• Event handlers associated with arcs can
• Modify the structure of data and/or presentation
  components.
• Make calls to external services
• Trigger the instantiation of additional WSIA
  components.

Property mutation events
WSIA Presentation Component

Property mutation events
Extensible Micro Control Language
WSIA Presentation Component
Property mutation events
WSIA Control Component
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Coordination through adaptation of output and
user interaction
Consumer
Producer
Output Adaptation
getOutput
End user
Input Adaptation (interception)
invokeAction on original Producer
Local implementation or redirection to
other Producer
Custom
Base WSIA Service
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Coordination through property setting and change
notification
Consumer
Producer A
getOutput
End user
invokeAction on original Producer
Base WSIA Service
Producer B
getOutput
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Consumer
3
, 10a
WSIA Pres. Service
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Action bar properties
User
5
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WSIA Control Service
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8
10b
WSIA Pres. Proxy
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Stock plot properties
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Possible interfaces for Coordinated level of
function

• Property change (event) notification
• addEventListeners
• removeEventListeners
• handleEvent
• Patterned after XML Events
• ltListenerListgt
• ltlistener eventPropertyMutation
  propertya/b/d
• handlerrefFor-EventSinkDocU
  RI/gt
• lt/ListenerListgt

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Overview of the WSIA service model
Producer
Lifecycle createInstance, destroyInstance Service
description getInterface, hasInterface
User interaction getOutput, invokeAction
Properties getPropertySchema, setProperties,
getProperties
Property synchronization addEventListener,
removeEventListener, handleEvent
Custom service specific operations to affect
either properties or output
Base WSIA Service
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Assumed WSRP design point

• Pluggable Producers
• administrator/end-user configuration - no
  programming at Consumer (local portal)
• generic proxy for all remote portlet services (no
  Producer-specific properties, operations)
• Standard types for
• user profile
• device description
• markup preferences
• locale
• Portal-specific lifecycle
• persistant portlet definitions
• transient user-specific sessions

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Alignment of WSIA and WSRP
Producer
Lifecycle createInstance, destroyInstance,
createSession( persistant-portlet-key ) Service
description getInterface, hasInterface
User interaction getOutput, invokeAction getPort
letOutput( WSRP-properties ) invokePortletAction(
WSRP-properties)
Properties getPropertySchema, setProperties,
getProperties
Property synchronization addEventListener,
removeEventListener, handleEvent
Custom service specific operations to affect
either properties or output
Base WSIA Service
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Orchestrated WSIA services
Users
Consumer
Producer
WSIA Service
Data and presentation properties
WSIA Proxy
HTTP(SOAP)
HTTP(HTML)
WSIA Application
WSIA Application
WSIA Runtime
WSIA Runtime
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Republished WSIA services
Consumer becomes a WSIA service
Users
Producer
Consumer
WSIA Service
Data and presentation properties
WSIA Proxy
HTTP(SOAP)
HTTP(SOAP)
WSIA Application
WSIA Application
WSIA Runtime
WSIA Runtime
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Open Issues and Focus Areas

• Requirements -- driven by business scenarios and
  use-cases
• Usage patterns and requirements
• Core functionality and architecture of the UI
  framework
• Base interfaces base service, adaptation, data
  inputs and outputs, page entry points, and
  collection/container
• Flow composition
• Aggregation (global composition)
• Event interaction and composition
• Surrounding issues
• Security
• Performance
• Management model
• Agreements
• Availability, failure and recovery semantics
• Adoption
• Tools and runtime support
• Sample service implementations
• Business/technical education training
• Standardization
• Standardization process for core architecture

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For further information...

• On WSIA
• www.oasis-open.org/committees/wsia
• On WSXL
• http//www-106.ibm.com/developerworks/library/ws-w
  sxl/