ws-VLAM workflow Composer

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ws-VLAM workflow Composer

• System and Network Engineering group
• Institute of informatics
• University of Amsterdam

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Introduction

• This presentation contains information related to
  WS-VLAM composer
• It helps the reader understand how to use WS-VLAM
  composer, describes the current state and present
  the ongoing activities and planned ones.
• NOTE
• We are currently still working on the Users and
  developers Guide, they are not available at this
  time. The presentations do not replace the
  documentation it just give a quick introduction.
• Do not hesitate to contact us for further
  information
• Thanks for taking some of your time to read
  about the WS-VLAM work, any comments are more
  than welcome
• WS-VLAM developers
• gvlam-dev_at_lists.vl-e.nl

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Needed background

• To be able to follow the content of this
  presentation you will need to know about
• WSRF Web Service Reference Framework
• GT4 Globus Toolkit version 4
• More detailed description of the presented work
  can be found in the section of publication of the
  WS-VLAM home page

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Objective of this presentation

• Why you should be interested in this
  presentations?
• You want to use the WS-VLAM composer and want a
  quick introduction.
• More details can be the Users guide

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Outline

• Introduction
• Composer features
• Bar menu
• Detach/attach feature
• Get a graphical output of a workflow component
• Monitoring Graphical interface
• Export a workflow as composite element
• Define task farming description

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WS-VLAM Composer features

• Allows the graphical composition of the
  application workflow
• Generates the XML description of the workflow
• submits the description of the workflow using
  SOAP protocol to the workflow engine
• Retrieves the description of workflow components
  from Repository Services
• Allows attach and detach to/from workflow engine
  in the case of long running workflows
• Monitors the workflow execution using
  WSRF-notifications
• Supports hierarchical data typing.
• Supports hierarchical workflow composition
  (creates composite workflow components).
• Based on JGraph library http//www.jgraph.org

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WS-VLAM composer
Workflow Components palette
Composition panel
Monitoring consol
Property panel
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GUI features The menu bar

• Menu bar items (from left to right)
• Create new GUI
• Load saved workflow
• Save workflows
• Running workflow will be saved with the
  associated End Point Reference.
• Stop
• Terminates the execution of a running workflow
• Zoom in/out
• Layout

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GUI features detects missing components

• When opening an application workflow the GUI
  checks if components are still available (local
  or in the shared repository
• If a component is missing the GUI displays it in
  red
• the workflow cannot be executed

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GUI features Layout support

• For complex workflows there a layout support
  which helps the end-users reorganizing his
  workflow components by
• a click on the layout button
• The user can create modify the connections layout
  by creating intermediate graphical points
• press Shiftleft mouse button

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GUI features attach and detach

• For long running workflows, users can detach
  (close) the ws-VLAM client
• Note
• Before closing the ws-VLAM GUI the user has to
  save the running workflows
• Later on the user can attach to the running
  workflows by just loading the saved workflow.
• The end-point-reference and other information of
  the running workflow will be display in the
  monitoring console
• Note
• After loading the running workflow you can stop
  it , use the stop button in the main menu bar and
  restart a new execution

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GUI features attach to graphical output of a
workflow component

• To attach to the graphical output of a running
  workflow component
• Select the workflow component
• click on right mouse button
• select the View menu item

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GUI features Monitoring functions

• When the user runs the experiment a monitoring
  window appears
• The window has a tab for each workflow component
  to monitor the activity per component
• And Default tab which monitors the execution of
  the whole workflow
• workflow components monitoring tabs are composed
  of 3 tabs
• Std Out,
• Std Err,
• Module Status.
• By default the client subscribe only to the
  Module status event
• If the user is interested in some events he has
  to use the Get button at the bottom of each tab

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Additional Tools web services harvester

• Converting web services into workflow components
• Note only RPC style web service are supported so
  far
• The user has to specify the URI to the WSDL of
  the web service

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GUI features composite modules (Under
development)

• An application workflow can be saved one workflow
  component
• Popup window The users has to define the inputs,
  outputs ports and the parameters that should be
  exposed for the composite module.

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Additional Tools Scan workflow component
repository (Under development)

• Scan workflow component repository

• Still Under Testing and debugging

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Additional Tools define workflow farming (Under
development)

• Define a parameter input data to be used for
  farming the entire workflow automatically

• Still Under Testing and debugging

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Some References

1. Science Z Zhao, A Belloum, M Bubak Editorial
   Special section on workflow systems and
   applications in e-Future Generation Computer
   Systems 25 (5), 525-527
2. A. Wibisono, D. Vasyunin, V. Korkhov, AS.Z.
   Belloum WS-VLAM a GT4 based workflow management
   system , The 2nd International Workshop on
   Scientific Workflows, In conjunction with ICCS
   2007, Beijing, China, 2007
3. A.S.Z. Belloum, V. Korkhov, S. Koulouzis, M. A
   Inda, and M. Bubak Collaborative e-Science
   experiments from scientific workflow to
   knowledge sharing JULY/AUGUST, IEEE Internet
   Computing, 2011
4. Ilkay Altintas, Manish Kumar Anand, Daniel
   Crawl, Shawn Bowers, Adam Belloum, Paolo Missier,
   Bertram Ludascher, Carole A. Goble, Peter M.A.
   Sloot, Understanding Collaborative Studies
   Through Interoperable Workflow Provenance,
   IPAW2010, Troy, NY, USA

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Some References

1. A. Belloum, Z. Zhao, and M. Bubak Workflow
   systems and applications , Future Generation
   Comp. Syst. 25 (5) 525-527 (2009)
2.  Z. Zhao, A.S.Z. Belloum, et al., Distributed
   execution of aggregated multi domain workflows
   using an agent framework The 1st IEEE
   International Workshop on Scientific Workflows,
   Salt Lake City, U.SA, 2007
3. Zhiming Zhao, Adam Belloum, Cees De Laat, Pieter
   Adriaans, Bob Hertzberger Using Jade agent
   framework to prototype an e-Science workflow bus
   Authors Cluster Computing and the Grid, 2007.
   CCGRID 2007

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http//www.vl-e.nl/