Dmitry,
there is the import
org.apache.tapestry5.services.ComponentRequestFilter, which gets called on
page and component events. For example, Tynamo's tapestry-security module
(e.g. org.tynamo.security.SecurityComponentRequestFilter) uses these to
check if the user has the correct permissions.
Maybe this is too obvious of an answer and you're looking for something
else...
Cheers,
Alex K
On Mon, Aug 6, 2012 at 3:52 PM, Dmitry Gusev <dmitry.gu...@gmail.com> wrote:
> Hi,
>
> is it possible to intercept component event actions?
>
> I have one page with multiple zones. Blocks from another page rendered on
> these zones using ajax.
> Those blocks have components with event action handlers.
> Every action handler have context parameter, and I would like to check
> these params before action gets executed and, possibly, substitute another
> action output.
>
> Normally I'd use page's onActivate method for this, but since blocks are on
> the other page -- onActivate doesn't get invoked for that page.
> Now I have to repeat the code in order to do checks (see code below), but
> I'd really like to intercept these calls.
>
> Just can't find how to do this. Or I'm I doing something wrong and this can
> be done in some other way?
>
> public class PageWithBlocks {
>
> private Project project;
>
> ...
>
> public Object onActionFromCheckout(int projectId) {
> // XXX Code smells (DRY)
> if (project == null)
> {
> Object response = resolveProject(projectId);
> if (project == null) {
> return response;
> }
> }
>
> projectManager.scheduleCheckout(project);
>
> return settingsBlock;
> }
>
> public Object onActionFromUpdate(int projectId) {
> // XXX Code smells (DRY)
> if (project == null)
> {
> Object response = resolveProject(projectId);
> if (project == null) {
> return response;
> }
> }
>
> projectManager.scheduleUpdate(project);
>
> return settingsBlock;
> }
> }
>
> --
> Dmitry Gusev
>
> AnjLab Team
> http://anjlab.com
>
