Greg McChesneyThesis Proposal PresentationComputer Science, TTUGreg.mcchesney@ttu.edu

Service Context Management for Exertion-oriented Programming

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Overall Presentation Goal or Primary Purpose

Beginning

• Create a life-cycle for context management in Exertion Oriented Programming

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Learning Objectives

• As a result of this presentation, you will be able to:– Understand the purpose of contexts– Understand why a life-cycle is required– Utilize the life-cycle for your SORCER projects– Create a context in SORCER– Modify a context in SORCER– Launch a service in SORCER– View returned context from the service

Beginning

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Speaker’s Qualifications

• Greg McChesney is a graduate student at TTU

• Greg McChesney is planning to graduate in May of 2009 with a Master’s in Computer Science

• Greg McChesney thesis is on Cataloger and creating contexts and jobs in SORCER

Beginning

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Did you know?

There is no method for creating dynamic Contexts, Tasks, or Jobs in the SORCER environment.

Beginning

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Presentation Agenda

• Background Knowledge

• What is a Context?

• Discuss why a life-cycle is required

• Overview of life-cycle

• Discuss Task Editor

• Feasibility Study

• Demo

• Schedule

Beginning

Background Knowledge

• Many different Exertion-Oriented Systems

• Implementation based on SORCER– Created by Mike Sobolewski in 2002– Based on JINI services– Framework constantly evolving– Interoperability with existing providers a

concern for new development

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All About Contexts

• A Context is a set of instructions for a provider.

• The context various depending on the provider and the method being executed.

• Contexts can specify anything about a provider

• Example:– The context for makeDeposit in the

AccountTester is: deposit/amount=amount

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Sample Context

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Need for a Life-Cycle

• No method to dynamically create Contexts

• No method of updating or removing Contexts

• Exertion-oriented programming cannot be dynamic without Context management

• Updated Cataloger will provide more accessibility

• Need Context methods for a task-editor

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Proposed Life-Cycle

• Implement Context Methods into provider classes– New methods will be remotely invokeable– Get– Create– Update– Delete

• Update Cataloger to utilize new methods

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Life-Cycle Explained

• Context must be:– Stored locally by provider– Reloaded on provider restart– Saved on update/create– Return blank when none is found

• Changes must be– Compliant with existing providers– Provide backup file in case of bad context

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Use Case Diagram Cataloger

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Component Diagram Cataloger

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Cataloger UI Component Diagram

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Need for a Task Editor

• No common graphical method of creating tasks in SORCER– Each provider must have own GUI interface– Users must learn each providers interface

• Provide easier development of new services

• No method for creating Jobs

• No method for saving and reusing Jobs.

Middle

Edit the Context?

• Why would we want to edit the Context before we launch the Task?– The Context can often described input

variables that are not static, editing it allows us to change them.

– Example: The AccountTester would be useless if you could not specify how much you were depositing or withdrawing.

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Output of the Task

• Tasks return a Context for their output

• In the case of a simple Task the output is returned the user

• In a Job the output is used as input for the next Task

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Use Case-Task Manager

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Component Diagram-Task Manager

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Task Manager UI Component Diagram

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Feasibility Study

• Update Cataloger to test Life-Cycle methods– Get Context– Add Context– Update Context– Delete Context

• Utilize provider from Air Force Research Center (Mealstrom) to validate task manager works as intended

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Summary

• Benefits of Task Creation Panel– Simplified user interface– Less work for new provider creators

• In combination with new Cataloger will provide:– Complete Context Management– Task Initiation – Job Initiation

End

Schedule

• Literature Review

• System Requirements

• Life-Cycle context management model

• Architecture and detailed design

• LCSM prototype

• Thesis proposal presentation

• Framework Implementation-End Of February

• Validation of Use Cases and deployment-Early March

• Thesis Defense- Mid March

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