How to build successful DSL s

Transcription

1 How to build successful DSL s Octavie van Haaften Leendert Versluijs 5 juni

2 AGENDA Process Demo 2

3 What: The Goal Modeling must be less work than coding Generate code that runs Being able to always re-generate Code always conform a reference architecture Only for reoccurring patterns Usable for junior developers 3

4 What: The Domain Medium to large scale administrative systems Based on Microsoft architecture Latest available Microsoft technology Service oriented Open standards Microsoft & open source components Clear, explicit choices 4

5 What: The Architecture and Components Users User Interface components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Business Processes Business Classes User Processes Service Interfaces Business Workflows Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 5

6 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Business Processes Users User Interface components Business Classes Controls (Validation) (AJAX) User Processes Service Interfaces Business Workflows Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 6

7 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Users User Interface components User Processes Application Building Block Business Processes Business Classes Controls (Validation) Microsoft (AJAX) UI Process Service Interfaces Business Workflows Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 7

8 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Users Controls (Validation) Microsoft (AJAX) UI Process User Interface components User Processes Application Building Block Validation (Custom attributes) Service Interfaces Business Processes Business Workflows Business Classes Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 8

9 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Users Controls (Validation) Microsoft (AJAX) UI Process User Interface components User Processes Application Building Block Validation WCF (Custom (Behaviours) attributes) Service Interfaces Business Processes Business Workflows Business Classes Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 9

10 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Users User Interface components User Processes Application Building Block Business Process (Validation) Microsoft (AJAX) UI Process Service Interfaces (Translation for DTO s) Controls Validation WCF (Custom (Behaviours) attributes) Business Processes (Base classes) Business Workflows Business Classes Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 10

11 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Users User Interface components User Processes Application Building Block Business Process (Validation) Microsoft (AJAX) UI Process Business Classes Service Interfaces (Translation for DTO s) Business Class Business Processes (Base classes) (Translation) Controls (Business rules handling) Validation WCF (Custom (Behaviours) attributes) Business Workflows Service Agents DTO ListItem DTO Data Access Logic Components Data Service Agents 11

12 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Users User Interface components User Processes Application Building Block Business Process (Validation) Microsoft (AJAX) UI Process Business Classes Service Interfaces (Translation for DTO s) Business Class Business Processes (Base classes) (Translation) Controls (Business rules handling) Validation WCF (Custom (Behaviours) attributes) Business Workflows Service Agents DTO ListItem DTO NHibernate Data Access Logic Components Data Service Agents 12

13 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Log4Net Ordina DSL Specific Frameworks Users User Interface components User Processes Application Building Block Business Process (Validation) Microsoft (AJAX) UI Process Business Classes Service Interfaces (Translation for DTO s) Business Class Business Processes (Base classes) (Translation) Controls (Business rules handling) Validation WCF (Custom (Behaviours) attributes) Business Workflows Service Agents DTO ListItem DTO NHibernate Data Access Logic Components Data Service Agents 13

14 What: The Architecture and Components Communication Operational Management Security Ordina Core Framework Log4Net Ordina DSL Specific Frameworks Users User Interface components User Processes Application Building Block Business Process (Validation) Microsoft (AJAX) UI Process Business Classes Service Interfaces (Translation for DTO s) Business Class Business Processes (Base classes) (Translation) Controls (Business rules handling) Validation WCF (Custom (Behaviours) attributes) Business Workflows Service Agents DTO ListItem DTO NHibernate Data Access Logic Components Data Service Agents 14

15 Define: Analyze the code Static code is put into framework Re-occuring patterns are generated from a DSL The rest: keep writing the code by hand Tradeoffs : the division between putting something in the framework or generating code is iteratively being adjusted. 15

16 Define: Rules of the Game Define the concepts that you need in your DSL to generate the required code Focus on concepts above programming language level Keep a DSL small and simple Keep models for a DSL small Assume that you will need multiple DSLs Storyboard the models 16

17 Define: The Models Users Communication Operational Management Security Ordina Core Framework Ordina DSL Specific Frameworks Service DSL Business Processes Web-Scenario User Interface components User Processes Service Interfaces Business Classes DSL DSL Business Workflows Service Agents Data Contract DSL Workflow Foundation Sequential workflows DTO ListItem DTO Data Access Logic Components Data Service Agents 17

18 Build: Model Integration & Validation /> <HTML> <BODY> Hello World </BODY> </HTML> Class MyClass { public string Hello() { return Hello world ; } } DSL Specifiek Framework Class MyClass { public string Hello() { return Hello world ; } } DSL Specifiek Framework Generiek Framework Class MyClass { public string Hello() { return Hello world ; } } <Mapping> <Class> <Table> </Mapping> DSL Specifiek Framework CREATE TABLE MyTable FIELD1 int FIELD2 varchar(50) 18

19 Build: NDIP Ordina NDIP Code generation support Cross model validation DSL Intellisense support Propagate model changes Ordina Web Scenario Designer Ordina Data Contract Designer Ordina Service Designer Ordina Business Class Designer Output Output Output Output 19

20 Build: Code Generation Strategies Code generation templates (T4) Never change generated code, extend it Design extension points in generated code Code generation patterns Abstract Base Class GENERATED Partial Concrete SubClass GENERATED HAND WRITTEN Partial SubClass Extension XML merging Need partial XML files (a la partial C# classes) Configurable Controls and Unique identifiers 20

21 Build: Usability Visual Studio.NET Instant action on save Validation Generation Popups for complex editing tasks IntelliSense Generation of multiple files Cross project generation Files under model 21

22 Use: Create Fertile Environment Workshops developed Underlying architecture, framework & components The DSL s Development process with DSLs Project support Life Wiki for how-to's Q&A Release management Keep technology up to date Add new functionality Release new versions of DSL s regularly 22

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24 Take Away s Keep DSLs small A DSL doesn t live standalone, you need an NDIP Model is the unit of version control, multiuser access, etc. Everything in a model is used for code generation Models are leading: never touch the generated code Don t aim for 100% code generation The success lies in the usage of your DSL 24

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