Grails 0.6 Adds Best of Breed Mix From Spring Web Flow and Rich Conversations a la JBoss
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Graeme Rocher announced that Grails is moving further away from "its Rails-like beginnings" with this latest release. Although this release was labeled as 0.6, it's clearly being modest with the amount of work that went into it. Here's the full feature list:
The above snippet illustrates the concept of defining a unit of work or "conversation", as described in the JBoss Seam framework. Just as in Seam, the "flow" contains conversational state information.
3 comments
- Joint Groovy/Java Compilation
- Spring Web Flow Integration
- Support for Spring scopes to allow scoped services
- Improved support for REST with automatic XML/JSON marshalling and RESTful URL mappings
- New Config DSL for configuration not possible by convention
- Refreshed scaffolding interface and branding
- Support for Sitemesh inline decorators
- Controllers can now call tag libraries as methods
- New GSP tags
- Massive improvements to speed of start-up time, unit tests and generation tool
Spring Web Flow Integration
Just as Rod Johnson had proposed a new way of defining Spring-managed beans via code rather than the traditional XML markup, Graeme takes a similar approach by defining Spring Web Flow definitions with Groovy:
showCart {
on("checkout").to "enterPersonalDetails"
on("continueShopping").to "showCatalogue"
}
enterPersonalDetails {
on("submit") {
def p = new Person(params)
flow.person = p
def e = yes()
if(p.hasErrors() || !p.validate())return error()
}.to "enterShipping"
on("return").to "showCart"
on(Exception).to "handleError"
}
enterShipping {
on("back").to "enterPersonalDetails"
on("submit") {
def a = new Address(params)
flow.address = a
if(a.hasErrors() || !a.validate()) return error()
}.to "enterPayment"
}
The above snippet illustrates the concept of defining a unit of work or "conversation", as described in the JBoss Seam framework. Just as in Seam, the "flow" contains conversational state information.
Automatic XML/JSON marshalling and RESTful URL mapping
While previously using a plug-in for conversions, this release uses:
import grails.converters.*
...
def list = {
render Book.list() as XML
// or render Book.list() as JSON
}
Community comments
Seam
by
Martin Gilday
Posted
Re: Seam [News Item Updated]
by
Scott Delap
Posted
nice work
by
serge boulay
Posted
Seam
by
Martin Gilday
What integration has been added with JBoss Seam? There is no mention of it in the release notes. Here you have a subtitle "Rich Conversion via JBoss Seam" but then only have a code snippet showing content rendering, of XML and JSON. Graeme's blog seems to suggest that Grails' new integration with SWF provides something equivalent to Seam's conversations, not "via". Sorry to be pedantic, but the title just seems misleading (unless I have misunderstood).
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