![Rich Service Model
Policies
Policy
Evaluator
Requestor Fulfiller
Generic Workflow
Requestor
Fulfiller
Alternate
Fulfiller
1
2
1
4
2 3
2'
3'
Policy Evaluator
(injected at
runtime) If User in Researchers
then Fulfiller
else AlternateFulfiller
Policies
Policy
Evaluator
Requestor Fulfiller
Generic Workflow
Requestor
Fulfiller
Alternate
Fulfiller
1
3
1
2
5
4'
5'Policy Evaluator
returns service to
execute
Router
2
4 36
4Router
If User in Researchers
then [Fulfiller]
else [AlternateFulfiller]
Policy-driven Development
Just-In-Time Workflow Composition
Barry Demchak (bdemchak@ucsd.edu) & Ingolf KrĂźger
California Institute for Telecommunications and Information Technology, San Diego Division
Context
Cyberinfrastructure (CI)â â
⢠100s of stakeholders (e.g., producers,
consumers, operators, etc.)
⢠Stakeholders opt in only when CI
satisfies their requirements
⢠CIs have long delivery times
Solution
Policy
⢠Injected at specific workflow location
⢠Decision expressed in Domain-
Specific Language (DSL1)
⢠Provides alternate workflow(s)
Results
Benefits
⢠Rapid requirement realization
(on live system)
⢠Enable stakeholders to articulate
requirements as policies
⢠Enable complex/compound policies
Future Work
⢠Policy authoring system2,3
⢠Verify completeness/correctness4
using CPN Tools5
⢠Maintain system consistency
⢠Secure policy deployment
This material is based upon work supported by the National Institutes of Health
Under Grant Nos 1U01CA130771-01 (Project PALMS: Kevin Patrick, PI) and U54 HL108460
f
â â Cyberinfrastructures (CI)
f
f
â PALMS References
Physical Activity Location Measurement System to understand where activity-related energy expenditure occurs in
humans as a function of time and space. Harvests data from wearable devices on small and large scales, provides
framework for research and analysis, and has ultimate goal of discovering methods for engineering better health.
An Internet-based research computing environment that supports data acquisition, data storage, data management, data
integration, data mining, data visualization, and other computing and information processing services. Different
stakeholders produce, consume, manage, and govern a CI, and their requirements must be simultaneously met or else
the integrity of the CI degrades.
1. M. Fowler. Domain-Specific Languages. Boston, MA: Addison-Wesley, Pearson Education, Inc. Sept 2010.
2. T. Lodderstedt, D. Basin, and J. Doser. SecureUML: A UML-Based Modeling Language for Model-Driven Security. Proceedings of the
5th International Conference on The Unified Modeling Language. pp426-441. Springer Verlag, 2002.
3. A. Bhattacharjee and R. Shyamasundar. Activity Diagrams: A Formal Framework to Model Business Processes and Code Generation.
Journal of Object Technology. Vol 8, No 1, Jan 2009.
4. J. Juerjens. Security Systems Development with UML. Springer-Verlag Berlin Heidelberg, 2003.
5. K. Jensen and L. Kristensen. Coloured Petri Nets: Modeling and Validation of Concurrent Systems. Berlin: Springer-Verlag. 2009.
6. M. Arrott, B. Demchak, V. Ermagan, C. Farcas, E. Farcas, I. H. KrĂźger, and M. Menarini. Rich Services: The Integration Piece of the
SOA Puzzle. In Proceedings of the IEEE International Conference on Web Services (ICWS), Salt Lake City, Utah, USA. IEEE, Jul.
2007, pp. 176-183.
Sensor Data
Techniques
Service Oriented Architecture-
based execution & deployment
⢠Leverage standard patterns5:
strategy, messaging, routing, &
composite pattern
⢠Leverage role-based interaction,
choreography & interceptor
techniques
⢠High availability, reliable, scalable
Model-driven engineering
⢠Refinement follows Rich Service6
decomposition & logical/deployment
transformation
⢠Composition based on Systems-of-
Systems principles
PALMSâ Case Study
Data Storage Calculations Visualization
Overall Requirements
Problem
More stakeholders ď¨
requirements churn ď¨
even longer delivery times ď¨
unhappy stakeholders
â´ lower likelihood CI will satisfy
community requirements
Insight
Compose new workflows onto
existing workflows at runtime
⢠Access control, data stream filtering
⢠Feature addition/deletion
Conceptual](https://image.slidesharecdn.com/poster-jsoeresearchexpo2012-151111214953-lva1-app6891/85/poster-jsoe-research-expo-2012-1-320.jpg)
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- 1. Rich Service Model Policies Policy Evaluator Requestor Fulfiller Generic Workflow Requestor Fulfiller Alternate Fulfiller 1 2 1 4 2 3 2' 3' Policy Evaluator (injected at runtime) If User in Researchers then Fulfiller else AlternateFulfiller Policies Policy Evaluator Requestor Fulfiller Generic Workflow Requestor Fulfiller Alternate Fulfiller 1 3 1 2 5 4' 5'Policy Evaluator returns service to execute Router 2 4 36 4Router If User in Researchers then [Fulfiller] else [AlternateFulfiller] Policy-driven Development Just-In-Time Workflow Composition Barry Demchak (bdemchak@ucsd.edu) & Ingolf KrĂźger California Institute for Telecommunications and Information Technology, San Diego Division Context Cyberinfrastructure (CI)â â ⢠100s of stakeholders (e.g., producers, consumers, operators, etc.) ⢠Stakeholders opt in only when CI satisfies their requirements ⢠CIs have long delivery times Solution Policy ⢠Injected at specific workflow location ⢠Decision expressed in Domain- Specific Language (DSL1) ⢠Provides alternate workflow(s) Results Benefits ⢠Rapid requirement realization (on live system) ⢠Enable stakeholders to articulate requirements as policies ⢠Enable complex/compound policies Future Work ⢠Policy authoring system2,3 ⢠Verify completeness/correctness4 using CPN Tools5 ⢠Maintain system consistency ⢠Secure policy deployment This material is based upon work supported by the National Institutes of Health Under Grant Nos 1U01CA130771-01 (Project PALMS: Kevin Patrick, PI) and U54 HL108460 f â â Cyberinfrastructures (CI) f f â PALMS References Physical Activity Location Measurement System to understand where activity-related energy expenditure occurs in humans as a function of time and space. Harvests data from wearable devices on small and large scales, provides framework for research and analysis, and has ultimate goal of discovering methods for engineering better health. An Internet-based research computing environment that supports data acquisition, data storage, data management, data integration, data mining, data visualization, and other computing and information processing services. Different stakeholders produce, consume, manage, and govern a CI, and their requirements must be simultaneously met or else the integrity of the CI degrades. 1. M. Fowler. Domain-Specific Languages. Boston, MA: Addison-Wesley, Pearson Education, Inc. Sept 2010. 2. T. Lodderstedt, D. Basin, and J. Doser. SecureUML: A UML-Based Modeling Language for Model-Driven Security. Proceedings of the 5th International Conference on The Unified Modeling Language. pp426-441. Springer Verlag, 2002. 3. A. Bhattacharjee and R. Shyamasundar. Activity Diagrams: A Formal Framework to Model Business Processes and Code Generation. Journal of Object Technology. Vol 8, No 1, Jan 2009. 4. J. Juerjens. Security Systems Development with UML. Springer-Verlag Berlin Heidelberg, 2003. 5. K. Jensen and L. Kristensen. Coloured Petri Nets: Modeling and Validation of Concurrent Systems. Berlin: Springer-Verlag. 2009. 6. M. Arrott, B. Demchak, V. Ermagan, C. Farcas, E. Farcas, I. H. KrĂźger, and M. Menarini. Rich Services: The Integration Piece of the SOA Puzzle. In Proceedings of the IEEE International Conference on Web Services (ICWS), Salt Lake City, Utah, USA. IEEE, Jul. 2007, pp. 176-183. Sensor Data Techniques Service Oriented Architecture- based execution & deployment ⢠Leverage standard patterns5: strategy, messaging, routing, & composite pattern ⢠Leverage role-based interaction, choreography & interceptor techniques ⢠High availability, reliable, scalable Model-driven engineering ⢠Refinement follows Rich Service6 decomposition & logical/deployment transformation ⢠Composition based on Systems-of- Systems principles PALMSâ Case Study Data Storage Calculations Visualization Overall Requirements Problem More stakeholders ď¨ requirements churn ď¨ even longer delivery times ď¨ unhappy stakeholders â´ lower likelihood CI will satisfy community requirements Insight Compose new workflows onto existing workflows at runtime ⢠Access control, data stream filtering ⢠Feature addition/deletion Conceptual