Important Notice - Forums is archived
To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.
Vaadin lets you build secure, UX-first PWAs entirely in Java.
Free ebook & tutorial.
Vaadin Grails Plugin
Hi All,
I finally tried integrating Vaadin with Grails to see if it was possible to develop a Vaadin application without having to constantly redeploy in order to see my progress. The result is a new Vaadin Grails plugin, and I was very impressed with the increase in productivity. For details, check out the plugin here, or install the it in your Grails app like this:
grails install-plugin vaadinHave fun!
Daniel
Nevermind, I found a solution for this. I'll share it, as this might save someone a minute or two.
You can get a handle to your service, for example, by using a factory class like this:
import org.codehaus.groovy.grails.commons.ApplicationHolder
class ServiceFactory {
def getSomeService() {
return this.getBean('someService')
}
private def getBean(beanName) {
return ApplicationHolder.getApplication().getMainContext().getBean(beanName)
}
}
Then you would use this class in a vaadin component, like this:
...
def serviceFactory = new ServiceFactory()
def service = serviceFactory.getSomeService()
...
Hi All,
Based on Daniel's work, I've released a new (version 1.1) Grails Vaadin plugin. It now supports:
- Latest stable Vaadin version (6.3.3 at this time)
- Paths to your Vaadin UI other than the context root (e.g. http://www.somehost.com/myapp/vaadinUI)
- Per-environment configuration (Vaadin's 'production mode' = true for Grails production environment only. Can be overridden for any environment). Custom environments are also supported (e.g. 'beta', 'uat', etc)
A *huge* benefit to Grails 1.3 users is that because Grails 1.3 supports Groovy 1.7, which can use nested and anonymous inner classes, you can program all of your Vaadin UI in Groovy with natural Rich UI paradigms. For example, button listener registration and nested logic:
// Remove a contact from a list:
def removalCount = 0
contactRemovalButton = new Button("-", new Button.ClickListener() {
void buttonClick(ClickEvent event) {
contactList.removeItem(contactList.value)
//reference a non-final attribute inside an anonymous inner class!
removalCount++;
}
})
To install in your grails app:
> grails install-plugin vaadin
Happy coding!
Les Hazlewood
http://www.katasoft.com
Michael Carl:
java.lang.RuntimeException: javax.servlet.ServletException: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
...
This is an old post, but didn't see an answer on here regarding this problem. I recently ran into this myself, and though, cause is unknown (something between Vaadin, Grails, and Hibernate - helpful, huh?), I was able to get around this by only showing relevant data fields in the container I was populating and ignoring those put in by GORM/Vaadin using setVisibleColumns().
Seems simple enough. Like I said, exact cause unknown, but this works in my case. Freakishly, this problem led me to start developing my Grails view layer in Zk (gasp!), but now I'm back to Vaadin and very, very relieved.
Chris