Domain Specific Languages - A superficial approach
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The document discusses Domain Specific Languages (DSLs). It notes that DSLs are small languages focused on a particular aspect of a software system and cannot be used to build a full program alone. DSLs are commonly used alongside general purpose languages. Examples of DSLs include regular expressions, SQL, and parts of Rails. DSLs can be external and independent of a host language or internal and embedded within a host language. The advantages of DSLs include increasing abstraction, focusing on the problem domain rather than implementation details, and enabling code reuse. Potential drawbacks include high development costs and requiring expertise in the target domain.
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Domain Specific Languages - A superficial approach
- 1. DSL - Domain Specific Languages quinta-feira, 12 de dezembro de 13
- 2. * Soft ware Craftsman * Web Developer TRE-AL * Graduando Sistemas de Informação @toni_esteves quinta-feira, 12 de dezembro de 13
- 3. Domain... quinta-feira, 12 de dezembro de 13
- 4. * Visual representation of conceptual classes or objects real world... * Identify concepts related to system requirements... * It is an artifact that represents the domain of problem... * Should be independent of the physical solution... * Communication... * UML... quinta-feira, 12 de dezembro de 13
- 5. DSL... quinta-feira, 12 de dezembro de 13
- 6. “DSLs are small languages, focused on a particular aspect of a soft ware system. You can't build a full program with a DSL, but you often use multiple DSLs in a system mainly written in a general purpose language....” - Matin Fowler quinta-feira, 12 de dezembro de 13
- 7. “DSLs are small languages, focused on a particular aspect of a soft ware system. You can't build a full program with a DSL, but you often use multiple DSLs in a system mainly written in a general purpose language....” - Matin Fowler WTF ?! quinta-feira, 12 de dezembro de 13
- 8. A real aplication.... quinta-feira, 12 de dezembro de 13
- 9. quinta-feira, 12 de dezembro de 13
- 10. If you’ll design a device driver, which programming language do you choose ?! quinta-feira, 12 de dezembro de 13
- 11. Try this then, if you will build a compiler which programming language you choose ?! quinta-feira, 12 de dezembro de 13
- 12. X quinta-feira, 12 de dezembro de 13
- 13. General Purpose Languages Domain Specific Languages X quinta-feira, 12 de dezembro de 13
- 14. Communication Protocol Device Drives Games Databases Image Manipulations Mobile Agents Music Medical quinta-feira, 12 de dezembro de 13
- 15. Domain Specific Languages Communication Protocol Device Drives Games Databases Image Manipulations Mobile Agents Music Medical quinta-feira, 12 de dezembro de 13
- 16. Domain Specific Languages subroutine libraries/ API`s Component Framework / Object-Orientation Communication Protocol Device Drives Games Databases Image Manipulations Mobile Agents Music Medical quinta-feira, 12 de dezembro de 13
- 17. For example... Do you know this ?! =SOMA(D1:D5) quinta-feira, 12 de dezembro de 13
- 18. “ DSLs are very common in computing: e xample s i nclude CSS, re gul ar expressions, make, rake, ant, SQL, HQL, many bits of Rails, expectations in JMock, graphviz's dot language, FIT, strut's configuration file....” Matin Fowler quinta-feira, 12 de dezembro de 13
- 19. GUI builders can also be seen as DSLs? quinta-feira, 12 de dezembro de 13
- 20. Characteristics.... * Are usually small... * Are usually declarative... * Many DSLs are translated compiled) into calls to APIs... * Are divided into External DSL and Internal DSL... * Unambiguous... quinta-feira, 12 de dezembro de 13
- 21. Pattern Application.... Model: It`s the problem. May be a te xt ual e x pre ssion or a diagram... Plataform: Used for the execution of the problem... Integration: method to express the integration of language on the platform... quinta-feira, 12 de dezembro de 13
- 22. Pattern Application.... quinta-feira, 12 de dezembro de 13
- 23. Method of Integration... Reading: part of the platform i tse lf is de dic ate d t o t h e mastery of expressions of dsl and execution of your goals... Generation: a separate procedure is used to convert the DSL expression into something t h a t re c o g n i ze s p l a t f o r m natively... quinta-feira, 12 de dezembro de 13
- 24. Method of Integration... Craft Techniques: used when a particular model is not enough to solve the entire problem... quinta-feira, 12 de dezembro de 13
- 25. DSL types... quinta-feira, 12 de dezembro de 13
- 26. External... * Independent of a particular programming language... * Depends on the programming language... * It`s benefited by existing resources in the host language... * It`s limited by the rules of the host language restrictions... * May be readable to people who do not know anything about the language, but have experience in the field... quinta-feira, 12 de dezembro de 13
- 27. Internal... * Usually are easy to implement... * Creator of the language has the freedom to create the language the way you want... * Is necessary to create a compiler for parsing, processing syntax and mapping semantics... * Very flexible but takes time to create and maintain the compiler... quinta-feira, 12 de dezembro de 13
- 28. Advantages... * Solutions in their own language and domain... * Increase abstraction level... * What programming instead how programming... * Efforts on productivity... * Encapsulates the problem... * Make concise code... * Prepare code to reuse... * Generate sufficient documentation... quinta-feira, 12 de dezembro de 13
- 29. Drawback... * Requires attention to high costs... * Needs technical expertise on domain... * Needs to bring all the relevant domain knowledge... * Difficulty in seeking the general scope and the construction of domain-specific languages... * Experts must possess the relevant knowledge domain... quinta-feira, 12 de dezembro de 13
- 30. Other topics... * Embedded DSL... * Language Workbench... * Visual DSL`s... * Language-Oriented Programming... quinta-feira, 12 de dezembro de 13
- 31. Ending.... quinta-feira, 12 de dezembro de 13