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Ernst OberortnerVienna University of Technology
December 2008
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DOMAIN-SPECIFIC LANGUAGES
FOR
SERVICE-ORIENTED ARCHITECTURES:
AN EXPLORATIVE STUDY
2
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Agenda
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Problem
Background
Our Approach■ Study Details■ Study Results
Future Work
Conclusion
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PROBLEM
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PROBLEM
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PROBLEM
6
Domain Experts
High level of abstraction, domain-specificconcepts
IT Developers
Low level of abstraction, technical-, technology-, platform-specificimplementations
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BACKGROUND
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Domain-Specific Languages (DSL)
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• tailored for narrow domain
• e.g. SQL
• multiple levels of abstractions • business vs. technical experts
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Model-Driven Software Development (MDSD)
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• Functionality vs. Technology
• Different Levels of Abstractions
• Business Level:• no technical knowledge• Technology not important
• IT Level:• multiple technologies• collaboration between technologies• changing permanently (e.g. versions)
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OUR APPROACH
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MDSD-based DSL
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High-level DSLSyntax
High-Level Language
Model
Low-level DSLSyntax
extends
Low-Level Language
Model
extends
represents
represents
*
*
1
1
High-Level Model
Instance
Low-LevelModel
Instance
extends
instanceOf *
*
1
1 instanceOf
defined in
1 *
defined in
1 *
Domain Expert
Technical Expert
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Our Approach
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•Design decisions/Trade-offs• MDSD-based DSLs
• basic SOA concerns• e.g. controlflow, informationflow
• extensional SOA concerns• e.g. transactions, human interactions
• non SOA concerns• e.g. pageflow of Web applications
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Claims
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• systematic development approach
•multiple levels of abstractions• domain experts• IT experts
• extension/integration points
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View-based Modeling Framework (VbMF)
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View-based Modeling Framework (VbMF)
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Pageflow of Web UIs
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Study Results
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Claims:
• systematic development approach process-driven and non-process driven SOA
• separation into high- and low-level DSLs domain and IT experts
• enhance understandability and readability
• reduce complexity
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Study Results
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Design Decisions:
• DSL syntax language model
• High-level models low-level models
• multiple models one model
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Study Results
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Trade-Offs:
• Separation into high- and low-levels redundancy in languages inconsistencies overlapping concerns
• Detailed separation complex model merging
less understandable and readable DSLs
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FUTURE WORK
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FUTURE WORK
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• more experiments process-driven SOA non-process-driven SOA non SOA
• more design decisions/trade-offs
• more evaluation
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CONCLUSION
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CONCLUSION
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• Problem• domain vs. IT experts
• MDSD-based DSLs
• Study Details & Results• Design decisions/Trade-offs• Three experiments
• Future Work
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