[webbeans-dev] CDI Quartz Extension and SE Example

[pete at screamingcoder.com]

OK that's all implemented. The only slight differences are:

- the properties file where the named scheduls are defined is called
scheduler.properties and lives at the root of the classpath (optionally
provided by the client application)

- typesafe schedule binding types use the same mechanism as used by
interceptor binding types to approximate inheritence, ie:

@Scheduled("after.hours")
@BindingType
@Retention(RUNTIME)
public @interface AfterHours {};

- the type for arbitrarily scheduled events is now called Event, not
Schedule.

I'm ready to check this in, just need to find some decent internet access
(probably next week) so I can chat with Pete M and Dan, and then perform
the checkin.

Just have one question: Do you want the free-memory grapher example app
which demostrates usage of this module? If so the I'm not sure how that
will work since it is a SE/Swing app and this module will be going into the
Seam modules sandbox. I think it will look a little weird for an SE app to
depend on a Seam module. I guess I'm really wondering why the ties to Seam
when this is a generally useful module?

Cheers,

Pete.





On Thu, 25 Jun 2009 11:37:46 +0100, Peter Royle
<howardmoon at screamingcoder.com> wrote:
> OK will do. I'm just implementing the stuff below and cleaning up a  
> bit first. Got a 24hr flight ahead of me so should be able to get a  
> lot done - if I'm not rendered a zombie :).
> 
> 
> On 19/06/2009, at 7:12 PM, Pete Muir wrote:
> 
>> How about putting this in Seam sandbox/modules for now?
>>
>> Talk to Dan Allen offline about the structure for the code (but  
>> basically it is like webbeans-extensions).
>>
>> Also, ping me and I'll sort out the SVN permissions.
>>
>> On 28 May 2009, at 22:45, Peter Royle wrote:
>>
>>> Hi,
>>>
>>> I know you're all really busy right now with the spec updates, but  
>>> I've got a new extension for possible inclusion into WebBeans, plus  
>>> a new example app for SE which uses it.
>>>
>>> == Quartz Extension ==
>>>
>>> WebBeans-Quartz.zip
>>>
>>> The extension is a Quartz extension. It basically fires events  
>>> @Every Second, @Every Minute and @Every Hour, which can be observed  
>>> like so:
>>>
>>> public void updateSomething(@Observes @Every Hour hour) { // blah }
>>>
>>> On startup the extension first checks for the presence of observers  
>>> for each type of event and if there are no observers for a  
>>> particular type of event, no events will be scheduled.
>>>
>>> I intend to extend it by:
>>> 1)  introducing a way to define arbitrary schedules (in annotations  
>>> or in a properties file which is then referenced by name in an  
>>> annotation - which can then be made typesafe by subclassing the  
>>> annotation). Eg:
>>>
>>>    package org.jboss.webbeans.extension.scheduler;
>>>    public @interface Scheduled {
>>>        String name();
>>>    }
>>> -----------
>>>    public @interface AfterHours extends Scheduled{
>>>         String name() default "afterHours";
>>>    }
>>> -----------
>>>    schedule.properties:
>>>    afterHours=0 1 * * * *
>>> -----------
>>>    public void batchProcess(@Observes @AfterHours Schedule  
>>> schedule) { ... }
>>>
>>> 2) Adding whatever is necessary to make this usable in EE  
>>> environment. Any pointers?
>>>
>>> 3) Any other suggestions?
>>>
>>> == Memory Graph Example ==
>>>
>>> MemoryGrapher.zip
>>>
>>> This is another Swing based example, which renders a graph of the  
>>> VM's free memory, updating every second and calling garbage  
>>> collection every minute using the above extension. It's a nice  
>>> concise example of how to bootstrap and shutdown SE, how to observe  
>>> events and how to use the injectable logger. Plus everyone loves a  
>>> pretty graph!
>>>
>>> I know there is some obvious clean up work required, and maybe  
>>> removing the name Quartz (?) - which I'm happy to do prior to  
>>> checking in.
>>>
>>> What do you think?
>>>
>>>
>>> Pete.
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> webbeans-dev mailing list
>>> webbeans-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/webbeans-dev
>>
> 
> _______________________________________________
> webbeans-dev mailing list
> webbeans-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/webbeans-dev