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NCUG 2019: Spring forward: an introduction to Spring boot and Thymeleaf for (XPages) developers
The document provides an introduction to Spring Boot and Thymeleaf for XPages developers, outlining the features, similarities, and differences between these technologies and XPages. It details setup instructions, syntax, security integration, and additional tools like Lombok, Swagger, and Jenkins to enhance development. Resources for further learning are also included, such as documentation links and the Spring Forward starter project.
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NCUG 2019: Spring forward: an introduction to Spring boot and Thymeleaf for (XPages) developers
- 1. Spring forward: anintroduction to Spring boot and Thymeleaf for (XPages) developers Frank van der Linden Full stack Developer elstar IT
- 2. About me • FreelanceFull stack developer • Owner of elstar IT • Curious of new technology • IBM Champion 2013, 2014, 2017, 2018 and 2019
- 3. Disclaimer Session is NOTabout #dominoforever
- 4. How to proceed •What is Spring boot and Thymeleaf • Similarities and differences • Runs everywhere • How to start • Syntax • Security • New possibilities
- 5. What is Springboot and Thymeleaf
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- 7. Spring boot • Opensource, Pivotal is coordinating. • Spring boot creates Spring (Java) based applications • Embedded Tomcat makes it ‘just’ run everywhere • Auto configure as much as possible • Built in metrics and health checks • Easy to configure with YAML or property file • Very good documentation and code examples • Fast creation of REST api’s
- 8. Thymeleaf • Is atemplate engine • Based on Java and HTML5 • Very strict, or template will break • Full Spring framework support • Extensible with dialects • Full (and extensible) internationalisation support. • Reusable fragments, like Custom Controls • Extensive documentation
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- 10. XPages Spring Boot/Thymeleaf ConfigureFaces-config @Autowired Endpoints Need work or SmartNSF very strong support Security Built-in Need Spring Security Add-ons Lots of 3rd party add-on Thanks to OpenNTF Lots of 3rd party add-on Deployment Runs on Domino Runs everwhere Build Pain of the Domino Designer Maven/Gradle build out-of-the box IDE DDE (Windows) for OSGi plugins almost every IDE Almost every IDE, like Netbeans, Eclipse, IntelliJ and more (Windows, Linux, MacOS)
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- 12. Runs everywhere • WithEmbedded Tomcat as default the jar ‘just run’ • More choices of embedded web server, in the future also OpenLiberty • Will run on Docker • Will run on Cloud Foundry, like IBM Cloud or Pivotal on Azure • Tomcat can by excluding to run it on Websphere Application Server, Tomcat or WildFly (a.k.a JBoss) • Even on Domino as OSGi plugin, http://hasselba.ch/blog/?p=2589
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- 14. How to start •Install Gradle or Maven • Move over to start.spring.io • Or use the Starter in IntelliJ • Fill all the fields and select the required projects (full version) • Generate project • Download zip, unzip and add to Git repository. • Open project in favourite IDE, run ‘mvn clean install’ • Start coding
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- 16. Spring boot setup minimalYAML file
- 17. Thymeleaf setup add topom.xml
- 18. How it workstogether
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- 20. Spring boot syntax endpointto return an object as JSON endpoint to return a thymeleaf template
- 21. Component scan • Componentscan will scan all the packages for @Service, @Controller, @Repository and more @Component(s) • @Autowired will glue everything together
- 22. Thymeleaf syntax • Includethe th namespace to the page • Every html element attribute has a th:…. Equivalent. • Variable Expressions: ${...} • Selection Variable Expressions: *{...} • Message Expressions: #{...} • Link URL Expressions: @{...}
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- 28. Link URL Expressions resourcelinks links in on a page
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- 31. Fragments (2)fragment code useit multiple times
- 32. Attachments • Forget theUploadedFile provided by IBM, learn MultipartFile • MultipartFile has lots of similarities with UploadedFile, but easier to use. Less code to achieve the same
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- 34. Spring Security • Frameworkfor Authentication and Authorisation • Prevention of clickjacking, CORS, cross site request forgery • Integrates with Spring Boot and Thymeleaf • Customisable to the bone • Support for Basic Authentication, SAML2, oAuth and more.
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- 36. Spring security inThymeleaf add to pom.xml add namespace
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- 38. Lombok • Forget Gettersand Setters • Forget toString, hashCode and equals • One @Annotations rules the all (@Data or @Getter and @Setter) • Add logging by @annotations (@Log4j2 or @Slf4j)
- 39. Lombok add to pom.xml add@Data using the build in logging
- 40. Swagger • Part ofOpen API Specification, since v3 • Documentation of API’s • Playground for testing • Add annotation to generate the documentation dynamically
- 41. Swagger add to pom.xml adda configuration add annotation to endpoint
- 42. Jenkins • With Jenkinsyou can build automatically the application • …But also do quality control, do load tests and even deploy. • JenkinsFile should be in the root of the GIT Repository • Groovy is the language for JenkinsFile
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- 46. Reach out tome @flinden68 https://www.elstarit.nl flinden68@elstarit.nl https://nl.linkedin.com/in/flinden68 https://github.com/flinden68
- 47. Resources • Spring Initializr •http://start.spring.io/ • Thymeleaf documentation • http://www.thymeleaf.org/ • Spring Boot • https://projects.spring.io/spring-boot/ • Lombok • https://projectlombok.org/ • Jenkins • https://jenkins.io/
- 48. Resources • Swagger • http://swagger.io •Thymeleaf documentation • http://www.thymeleaf.org/ • Maven • https://maven.apache.org/ • Gradle • https://gradle.org/ • Spring Forward Starter • https://bitbucket.org/flinden68/spring-forward-starter