task #5285
Updated by Andreas Kohlbecker about 7 years ago
Vaadin Spring Addon
The Vaadin Spring integration library helps you build amazing Vaadin based user interfaces on top of your high quality Spring based enterprise backend. Your UI classes become Spring managed beans, allowing you to autowire Spring based services directly into your UI code.
Links:
* [Vaadin Spring API](https://vaadin.com/api/vaadin-spring/)
* [**Vaadin Spring Tutorial**](http://vaadin.github.io/spring-tutorial/)
* [Example application](https://github.com/Vaadin/spring-tutorial)
* https://vaadin.com/wiki/-/wiki/Main/Spring%20Integration (on Vaadin 6)
* https://vaadin.com/wiki/-/wiki/Main/Vaadin+Spring
The features of Vaadin Spring include:
* First class support for Spring Boot
* Vaadin UI, View and component classes can be Spring managed beans and utilise the IoC container provided by Spring core
* @SpringUI annotated classes are automatically published, no need to manually introduce a servlet
* Vaadin Navigator support for View classes annotated with @SpringView
*Scopes for Vaadin UIs and Views
* Using the @Autowired annotation in Vaadin UI code
* Push support
**TODO**:
*THE BOOK OF VAADIN (2016-04-19) IS OUTDATED REGARDING VAADIN-SPRING!*
Therefore the below conclusions may not be up to date.
* ~~Add `vaadin-spring` as maven dependency~~ DONE
* ~~`CdmVaadinConversationalServlet`, `StatusEditorUI`, `ConceptRelationshipUI`, `ConceptRelationshipUIRedirect`, `CheckTestUI`, `D3CTreeUI` which are extending `VaadinServlet` must be modified (see *Book of Vaadin, 12.18.4. Preparing Application for Spring*) Since we need need **multiple servlets** with custom configuration see **Section 12.18.8, “Deploying Spring UIs and Servlets”** is important for us~~ DONE also all subtasks below
* CdmVaadinConversationalServlet: needs to extend SpringVaadinServlet
* UI Classes:
* The inner `VaadinServlet` classes of the UI Classes need to extend `SpringVaadinServlet`
* the `@VaadinServletConfiguration` needs to be removed. **Q:** How can the widgetset be configured? (The other attributes are obsolete.) **A:** Use the `@WidgetSet` at the type level.
* The `@Scope` annotation at the `DetailWindow` must be replaced by `@ViewScope` or by `@UIScope` if this annotation is really still relevant.
* A couple of Views are evaluating the Spring Security Context. These classes are using the static method `SecurityContextHolder.getContext()` to get the context. This can most probably be replaced by `ViewAccessControl` or `ViewInstanceAccessControl`, which can restrict access to the view either
before or after a view instance is created. (See *Book of Vaadin 12.18.7. Access Control* ) Control
*)
* The `CdmSpringContextHelper` no longer needs to provide the Springbeans by the bean id when using `vaadin-spring`. Through spring-vaadin injection of spring beans works. Springbeans can be @Autowired. The `CdmSpringContextHelper` should be replaced by the *Repository View* addressed in #3320 - I attempted to refactor cdm-vaading accordingly but giving up on this, due to the complexity and variety of the 'design patterns' that have been used: commit:cdm-vaadin|a735bbb