Recent Grails CVS Activity

[graemer]

Just to keep everyone up-to-date on what has been happening with
Grails. The following features have been added:

* Support for save/reload of views by using a filter only included
with the "run-app" command that copies all resources across when they
change (it also copies the .groovy files for controllers etc. but
there is no code there yet that checks for changes and reloads etc.)
* Groovy Server Pages (GSP) has been forked and customised for Grails.
It has been heavily refactored into a TemplateEngine (although it
still doesn't actually extend TemplateEngine it uses the same general
interface, it was previously a servlet). What this means is you can
now write views in JSP or GSP
* The QuickStart guide (http://grails.codehaus.org/Quick+Start) has
been updated with a GSP example
* Although GSP won't support JSP tag libraries support has been added
for the Grails tag library to GSP. All <gr:*> tags will be available
in both JSP (as a taglib) and GSP (automatically). I did this becauses
some things are just better represented as a tag. At the moment I have
only implemented one but there are many more to come: <gr:link
controller="book" action="list" />
* A few useful new methods have been added to controllers including
"bindData", "render" and "rico" (see
http://grails.codehaus.org/Dynamic+Methods+Reference)


*Gasp*

Cheers,
Graeme

[Dierk König]

Hi,

after fetching the latest changes, I get for the books project after
grails init
grails run-app

   [script] Servlet 'grails' configured successfully
   [script] Started SocketListener on 0.0.0.0:8080
   [script]
org.mortbay.util.MultiException[java.lang.ClassNotFoundException:
org.codehaus.groovy.grails.web.pages.GroovyPagesServlet]
   [script]     at org.mortbay.http.HttpServer.doStart(HttpServer.java:731)

cheers
Mittie

[Dierk König]

with the latest changes and rebuild, it's still not working, but
the message changed :-)

   [script] Looking up handler for [/books]
   [script] Testing handler adapter
[org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@18353cf]
   [script] Last-Modified value for [/books/books] is [-1]
   [script] DispatcherServlet with name 'grails' received request for
[/books/books]
   [script] Testing handler adapter
[org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@18353cf]
   [script] HandlerExceptionResolver returned ModelAndView [ModelAndView:
reference to view with name 'error'; model is
{exception=java.lang.IllegalArgumentException: No eventId could be
obtained -- make sure the client provides the _eventI
d parameter as input; the parameters provided for this request
were:map[[empty]]}] for exception
   [script] Handler execution resulted in exception - forwarding to resolved
error view
   [script] java.lang.IllegalArgumentException: No eventId could be
obtained -- make sure the client provides the _event
Id parameter as input; the parameters provided for this request
were:map[[empty]]
   [script]     at org.springframework.util.Assert.hasText(Assert.java:142)
   [script]     at
org.springframework.webflow.execution.FlowExecutionManager.onEvent(FlowExecu
tionManager.java:435)
   [script]     at
org.springframework.webflow.execution.servlet.ServletFlowExecutionManager.ha
ndle(ServletFlowExecution
Manager.java:91)
   [script]     at
org.codehaus.groovy.grails.web.pageflow.execution.servlet.GrailsServletFlowE
xecutionManager.handle(Gr
ailsServletFlowExecutionManager.java:115)
   [script]     at
org.springframework.webflow.mvc.FlowController.handleRequestInternal(FlowCon
troller.java:138)
   [script]     at
org.springframework.web.servlet.mvc.AbstractController.handleRequest(Abstrac
tController.java:128)
   [script]     at
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(Si
mpleControllerHandlerAdap
ter.java:44)
   [script]     at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServl
et.java:684)
   [script]     at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServle
t.java:625)
   [script]     at
org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkSer
vlet.java:386)
   [script]     at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java
:346)
   [script]     at
javax.servlet.http.HttpServlet.service(HttpServlet.java:596)

cheers
Mittie

> -----Original Message-----
> From: Dierk Koenig [mailto:[hidden email]]
> Sent: Donnerstag, 12. Januar 2006 21:25
> To: [hidden email]
> Subject: RE: [grails-dev] Recent Grails CVS Activity
>
>
> Hi,
>
> after fetching the latest changes, I get for the books project after
> grails init
> grails run-app
>
>    [script] Servlet 'grails' configured successfully
>    [script] Started SocketListener on 0.0.0.0:8080
>    [script]
> org.mortbay.util.MultiException[java.lang.ClassNotFoundException:
> org.codehaus.groovy.grails.web.pages.GroovyPagesServlet]
>    [script]     at
> org.mortbay.http.HttpServer.doStart(HttpServer.java:731)
>
> cheers
> Mittie

[graemer]

I've noticed this error before it is related to the flow execution
state on webflows..i had to close my browser and restart it fresh to
get round it before. if you try normal controllers it will work fine..

I need to revisit webflows and improve them, but as much as i love the
webflows the priority at the moment is to get normal controllers
finished which means implementing things like the tag
library,scaffolding  etc.

Graeme

On 12/01/06, Dierk Koenig <[hidden email]> wrote:

> with the latest changes and rebuild, it's still not working, but
> the message changed :-)
>
>    [script] Looking up handler for [/books]
>    [script] Testing handler adapter
> [org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@18353cf]
>    [script] Last-Modified value for [/books/books] is [-1]
>    [script] DispatcherServlet with name 'grails' received request for
> [/books/books]
>    [script] Testing handler adapter
> [org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@18353cf]
>    [script] HandlerExceptionResolver returned ModelAndView [ModelAndView:
> reference to view with name 'error'; model is
> {exception=java.lang.IllegalArgumentException: No eventId could be
> obtained -- make sure the client provides the _eventI
> d parameter as input; the parameters provided for this request
> were:map[[empty]]}] for exception
>    [script] Handler execution resulted in exception - forwarding to resolved
> error view
>    [script] java.lang.IllegalArgumentException: No eventId could be
> obtained -- make sure the client provides the _event
> Id parameter as input; the parameters provided for this request
> were:map[[empty]]
>    [script]     at org.springframework.util.Assert.hasText(Assert.java:142)
>    [script]     at
> org.springframework.webflow.execution.FlowExecutionManager.onEvent(FlowExecu
> tionManager.java:435)
>    [script]     at
> org.springframework.webflow.execution.servlet.ServletFlowExecutionManager.ha
> ndle(ServletFlowExecution
> Manager.java:91)
>    [script]     at
> org.codehaus.groovy.grails.web.pageflow.execution.servlet.GrailsServletFlowE
> xecutionManager.handle(Gr
> ailsServletFlowExecutionManager.java:115)
>    [script]     at
> org.springframework.webflow.mvc.FlowController.handleRequestInternal(FlowCon
> troller.java:138)
>    [script]     at
> org.springframework.web.servlet.mvc.AbstractController.handleRequest(Abstrac
> tController.java:128)
>    [script]     at
> org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(Si
> mpleControllerHandlerAdap
> ter.java:44)
>    [script]     at
> org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServl
> et.java:684)
>    [script]     at
> org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServle
> t.java:625)
>    [script]     at
> org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkSer
> vlet.java:386)
>    [script]     at
> org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java
> :346)
>    [script]     at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
>
> cheers
> Mittie
>
> > -----Original Message-----
> > From: Dierk Koenig [mailto:[hidden email]]
> > Sent: Donnerstag, 12. Januar 2006 21:25
> > To: [hidden email]
> > Subject: RE: [grails-dev] Recent Grails CVS Activity
> >
> >
> > Hi,
> >
> > after fetching the latest changes, I get for the books project after
> > grails init
> > grails run-app
> >
> >    [script] Servlet 'grails' configured successfully
> >    [script] Started SocketListener on 0.0.0.0:8080
> >    [script]
> > org.mortbay.util.MultiException[java.lang.ClassNotFoundException:
> > org.codehaus.groovy.grails.web.pages.GroovyPagesServlet]
> >    [script]     at
> > org.mortbay.http.HttpServer.doStart(HttpServer.java:731)
> >
> > cheers
> > Mittie
>
>

[Dierk König]

> I've noticed this error before it is related to the flow execution
> state on webflows..i had to close my browser and restart it fresh to
> get round it before. if you try normal controllers it will work fine..

restarting the browser solved the Exception but the books app doesn't
start anyway.
Connecting to http://localhost:8080/books/books shows
----
HTTP ERROR: 404

/WEB-INF/grails-app/viewslistBooks.jsp

RequestURI=/books/books
----
with log output
----
   [script] Opening single Hibernate Session in OpenSessionInViewFilter
   [script] Testing handler map
[org.codehaus.groovy.grails.web.servlet.mvc.GrailsUrlHandlerMapping@188c838]
in Dispatch
erServlet with name 'grails'
   [script] Looking up handler for [/books]
   [script] Testing handler adapter
[org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@111089b]
   [script] Last-Modified value for [/books/books] is [-1]
   [script] DispatcherServlet with name 'grails' received request for
[/books/books]
   [script] Testing handler adapter
[org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@111089b]
   [script] Cached view 'listBooks'
   [script] Rendering view [org.springframework.web.servlet.view.JstlView:
name 'listBooks'; URL [/WEB-INF/grails-app/vi
ewslistBooks.jsp]] in DispatcherServlet with name 'grails'
   [script] Successfully completed request
   [script] Closing single Hibernate Session in OpenSessionInViewFilter
----

> I need to revisit webflows and improve them, but as much as i love the
> webflows the priority at the moment is to get normal controllers
> finished which means implementing things like the tag
> library,scaffolding  etc.

ok. I understand.
It's a bit difficult for me to tell what's supposed to work and
what isn't.
I worked on integrating WebTest more closely but I need the backing
of a running solution before I dare to commit any changes...

cheers
Mittie

[graemer]

On 12/01/06, Dierk Koenig <[hidden email]> wrote:
> > I've noticed this error before it is related to the flow execution
> > state on webflows..i had to close my browser and restart it fresh to
> > get round it before. if you try normal controllers it will work fine..
>
> restarting the browser solved the Exception but the books app doesn't
> start anyway.
> Connecting to http://localhost:8080/books/books shows

Hmm this is likely because the page flows are not setting the default
action to forward to correctly. It should forward to
/WEB-INF/grails-app/views/books/viewlistBooks.jsp but clearly isn't

> ----
> HTTP ERROR: 404
>
> /WEB-INF/grails-app/viewslistBooks.jsp
>
> RequestURI=/books/books
> ----
> with log output
> ----
>    [script] Opening single Hibernate Session in OpenSessionInViewFilter
>    [script] Testing handler map
> [org.codehaus.groovy.grails.web.servlet.mvc.GrailsUrlHandlerMapping@188c838]
> in Dispatch
> erServlet with name 'grails'
>    [script] Looking up handler for [/books]
>    [script] Testing handler adapter
> [org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@111089b]
>    [script] Last-Modified value for [/books/books] is [-1]
>    [script] DispatcherServlet with name 'grails' received request for
> [/books/books]
>    [script] Testing handler adapter
> [org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter@111089b]
>    [script] Cached view 'listBooks'
>    [script] Rendering view [org.springframework.web.servlet.view.JstlView:
> name 'listBooks'; URL [/WEB-INF/grails-app/vi
> ewslistBooks.jsp]] in DispatcherServlet with name 'grails'
>    [script] Successfully completed request
>    [script] Closing single Hibernate Session in OpenSessionInViewFilter
> ----
>
> > I need to revisit webflows and improve them, but as much as i love the
> > webflows the priority at the moment is to get normal controllers
> > finished which means implementing things like the tag
> > library,scaffolding  etc.
>
> ok. I understand.
> It's a bit difficult for me to tell what's supposed to work and
> what isn't.
> I worked on integrating WebTest more closely but I need the backing
> of a running solution before I dare to commit any changes...

I understand, I will build a more complete sample app using normal
controllers once I have everything I needed implemented, you cant then
work on integrating WebTest then. Once, I'm happy normal controllers
are finished I will then look at all the problems with page flows and
we can re-visit the books sample app.

>
> cheers
> Mittie
>
>