Trivadis TechEvent 2016 Kill three birds with one stone (Eclipse Scout) by Christian Mötzing
1 like344 views
Eclipse Scout is an open-source framework for building desktop, web, and mobile applications using pure Java code. It aims to improve productivity, reduce costs and time to market, and ensure applications are future proof. The framework achieves this through architectural decoupling of the UI, services, and business logic layers. This allows applications built with Eclipse Scout to target multiple platforms without code changes. The framework has been in development for over 16 years and promotes a steep initial learning curve but high long-term productivity.
![UI: Input Validation
AD – Eclipse Scout16 30.09.2016
1 public class FirstNameField extends AbstractStringField {
2 private String PATTERN = "^[A-Z][a-z]+$";
3 @Override
4 protected int getConfiguredMaxLength() {
5 return 64;
6 }
7 @Override
8 protected String execValidateValue(String rawValue) {
9 if (rawValue != null &&
!Pattern.matches(PATTERN, rawValue)) {
10 throw new
VetoException(TEXTS.get("BadFirstName"));
11 }
12 return rawValue;
13 }
14 }](https://image.slidesharecdn.com/te092016christianmtzingkillthreebirdswithonestoneeclipsescout-161006080514/85/Trivadis-TechEvent-2016-Kill-three-birds-with-one-stone-Eclipse-Scout-by-Christian-Motzing-16-320.jpg)
Trivadis TechEvent 2016 Kill three birds with one stone (Eclipse Scout) by Christian Mötzing
- 1. BASEL BERN BRUGG DÜSSELDORF FRANKFURT A.M. FREIBURG I.BR. GENEVA HAMBURG COPENHAGEN LAUSANNE MUNICH STUTTGART VIENNA ZURICH Kill three birds with one stone Mobile, Web and Desktop application in one take with Eclipse Scout Christian Mötzing Consultant – AD Stuttgart
- 2. Enterprise • boring • enables work • legacy • conservative use of technology Web • fancy • life-style • trending • infinite budget • geek play ground Application Types AD – Eclipse Scout2 30.09.2016 from … to …
- 3. Enterprise • boring • enables work • legacy • conservative use of technology Enterprise Applications AD – Eclipse Scout3 30.09.2016 Can‘t change every day Usability Accessability limiting factors – Skill – License – Maturity – …
- 4. AD – Eclipse Scout4 30.09.2016 Eclipse Scout
- 5. Eclipse Scout AD – Eclipse Scout5 30.09.2016 OpenSource (initiated in 2010) Claims – Quality – Time to Market – Costs – Future Proof (16 years development, no rewrites, state of the art) Source: https://wiki.eclipse.org/images/8/87/100601_eclipse_banking_day_scout.pdf
- 6. How to deliver these claims AD – Eclipse Scout6 30.09.2016 Good framework structure, testing facilities included, proven technologiesQuality Time to Market Cost Future Proof High productivity through eclipse integration, steep learning curve Built-in architecture plan, decoupling
- 7. Excursion: Learning Curves AD – Eclipse Scout7 30.09.2016 Experience Learning Experience Learning Steep Shallow
- 8. How to deliver these claims AD – Eclipse Scout8 30.09.2016 Good framework structure, testing facilities included, proven technologiesQuality Time to Market Cost Future Proof High productivity through eclipse integration, steep learning curve Built-in architecture plan, decoupling proven technologies productivity decoupling
- 9. How does Eclipse Scout decouple? AD – Eclipse Scout9 30.09.2016 UI Server Business Logic Server Database Server communication communication „Don‘t depend on ANY UI technology.“ Source: https://wiki.eclipse.org/images/e/e8/160202b_Scout_OOP.pdf Pure Java UI No Technology
- 10. Architectural Decoupling AD – Eclipse Scout10 30.09.2016 Source: Scout Technical Guide 6.0 1 example.app 2 example.app.server 3 example.app.shared 4 example.app.client 5 example.app.ui.html 6 example.app.server.app.dev 7 example.app.ui.html.app.dev 8 example.app.server.app.war 9 example.app.ui.html.app.war
- 11. Programming Paradigm Decoupling AD – Eclipse Scout11 30.09.2016 Application code is pure Java – No UI technology references – No service technology references – No dependency injection specifics „Don‘t depend on ANY UI technology.“ Source: https://wiki.eclipse.org/images/e/e8/160202b_Scout_OOP.pdf
- 12. UI: Define a Field on a Form AD – Eclipse Scout12 30.09.2016 1 public FirstNameField getFirstNameField() { 2 return getFieldByClass(FirstNameField.class); 3 } 4 5 @Order(30) 6 public class FirstNameField extends AbstractStringField { 7 @Override 8 protected String getConfiguredLabel() { 9 return TEXTS.get("FirstName"); 10 } 11 }
- 13. UI: Define a Data Object AD – Eclipse Scout13 30.09.2016 1 @Generated(value = "org.eclipse...client.person.PersonForm") 2 public class PersonFormData extends AbstractFormData { 3 public FirstName getFirstName() { 4 return getFieldByClass(FirstName.class); 5 } 6 7 public static class FirstName extends AbstractValueFieldData<String> { 8 private static final long serialVersionUID = 1L; 9 } FormData FormData UI Service SQL
- 14. Service: Define a Service AD – Eclipse Scout14 30.09.2016 1 @ApplicationScoped 2 @TunnelToServer 3 public interface IPersonService { 4 5 PersonFormData create(PersonFormData formData); 6 7 PersonFormData load(PersonFormData formData); 8 9 PersonFormData store(PersonFormData formData); 10 } 11 12 public class PersonService implements IPersonService { … 13 }
- 15. Service: Persisting Data AD – Eclipse Scout15 30.09.2016 1 @Override 2 public PersonFormData store(PersonFormData formData) { 3 SQL.insert(SQLs.PERSON_INSERT, formData); 4 return formData; 5 } 6 7 // SQL.java 8 String PERSON_UPDATE = "" + "UPDATE PERSON " + "SET first_name = :firstName, " + " last_name = :lastName, „ … + "WHERE person_id = :personId"; 9
- 16. UI: Input Validation AD – Eclipse Scout16 30.09.2016 1 public class FirstNameField extends AbstractStringField { 2 private String PATTERN = "^[A-Z][a-z]+$"; 3 @Override 4 protected int getConfiguredMaxLength() { 5 return 64; 6 } 7 @Override 8 protected String execValidateValue(String rawValue) { 9 if (rawValue != null && !Pattern.matches(PATTERN, rawValue)) { 10 throw new VetoException(TEXTS.get("BadFirstName")); 11 } 12 return rawValue; 13 } 14 }
- 17. UI: Form Validation AD – Eclipse Scout17 30.09.2016 1 // on field inside form 2 @Override 3 protected void execChangedValue() { 4 validateAddressFields(); 5 } 6 } 7 8 // on form 9 protected void validateAddressFields() { 10 boolean hasStreet = StringUtility.hasText(getStreetField().getValue()); 11 // if you provide a street, then you must provide a city 13 getCityField().setMandatory(hasStreet); 14 }
- 18. Programming Paradigm Decoupling (2nd time) AD – Eclipse Scout18 30.09.2016 Application code is pure Java – No UI technology references – No service technology references – No dependency injection specifics „Don‘t depend on ANY UI technology.“ Source: https://wiki.eclipse.org/images/e/e8/160202b_Scout_OOP.pdf No CDI (JSR346) No standard internationalization No standard tools (like Apache Commons StringUtils)
- 19. Technology behind framework is not visible AD – Eclipse Scout19 30.09.2016 Source: Scout Technical Guide 6.0 Even Services use a „Service Tunnel“ not REST or SOAP
- 20. AD – Eclipse Scout20 30.09.2016 What could have been the Demo
- 21. Desktop AD – Eclipse Scout21 30.09.2016 Source: http://www.eclipse.org/scout/
- 22. Web AD – Eclipse Scout22 30.09.2016 Source: http://www.eclipse.org/scout/
- 23. Mobile AD – Eclipse Scout23 30.09.2016 Source: http://www.eclipse.org/scout/
- 24. What about that „killing three birds with one stone“ part AD – Eclipse Scout24 30.09.2016 Scout 5.0 • SWING • SWT • RAP Scout 6.0 • HTML5 • CSS • JavaScript
- 25. AD – Eclipse Scout25 30.09.2016 The actual Demo
- 26. What else comes with Eclipse Scout AD – Eclipse Scout26 30.09.2016 Internationalization Security Theming & Styling (with CSS3 + Less) IDE integration (Eclipse only) Aim for a long life (Enterprise Applications > 10 years) Yet to be proven publicly since only in market for 6 years.
- 27. Migrating other Applications to Eclipse Scout AD – Eclipse Scout27 30.09.2016 UI Services Data Model UI Services Data ModelSQLs, Tables Service Logic ?
- 28. Conclusion AD – Eclipse Scout28 30.09.2016 The Good – Framework with the best UI abstraction I have seen to date – High productivity (not verified by me on longterm) – You get a good standard UI without (any) HTML or CSS knowledge The Bad – High abstraction means customization is more complex – Skills are pretty unique to framework
- 29. AD – Eclipse Scout29 30.09.2016 Demo: https://scout.bsi-software.com/contacts/ Docs: https://github.com/BSI-Business-Systems-Integration-AG/org.eclipse.scout.docs Project: https://eclipse.org/scout/
- 30. Session Feedback – now AD – Eclipse Scout30 09.09.2016 Please use the Trivadis Events mobile app to give feedback on each session Use "My schedule" if you have registered for a session Otherwise use "Agenda" and the search function If the mobile app does not work (or if you have a Windows smartphone), use your smartphone browser – URL: http://trivadis.quickmobileplatform.eu/ – User name: <your_loginname> (such as “svv”) – Password: sent by e-mail...
- 31. Christian Mötzing Consultant Tel. +49 711 903 632 342 christian.moetzing@trivadis.com 30.09.2016 AD – Eclipse Scout31