Hello, > > Hey, > > I'm sorry for my delayed answer too ;-) > > Well, what I'm trying to gain is implementation independent blocks. > I cleaned up the JMS block using Spring provided mechanisms > (templates) for message delivery. > > The sample block is now based on the ActiveMQ implementation > running in embedded mode (initialized via Spring namespace). > For demonstration purpose, it uses the > JMSEventMessageListener component for invalidating cached responses. > > As far as I get this, there are no dependencies between > eventcache and jms-impl at all? > If we consider (re)placing the JMSEventMessageListener into > the jms-sample block, because it is a concrete subclass of > the AbstractMessageListener, we would get a more satisfying situation.
Doesn't the JMSEventMessageListener have a dependency on eventcache, or none at all (it's been a while so I might be off here...) > > The way you might go, consists of writing a concrete listener > in a separate block, using whatever other block (e.g. > eventcache) you might need. I must also admit I haven't yet been working with 2.2 and only 2.1. Do I get correctly, that we would have in the end a jms block and a separate event block, and if you want the event block using the jms, you need to add a separate block containing the concrete listener impl? Or is it not necessary to add a block...? > > Can you live with that? Honestly, you can better judge it then I can, because I am still to much thinking and looking at it from the 2.1 days... :-). So if it makes the architecture of the blocks better, you ahead -Ard > > Regards, > Lukas > > Ard Schrijvers schrieb: > > Hello Lukas, > > > > Sry for my late respond > > > >> Hello, > >> > >> I'm wondering, why the eventcache block has dependencies > on the JMS > >> block and not the other way round? > > > > I do not know what you would win by switching the > dependency around. > > JMS seems to me more uncoupled from eventcache then > eventcache to jms. > > Perhaps I would like to use JMS listeners, while at the > same time I do > > not have any eventcache at all. I would for example just use JMS > > to...I don't know, trigger an email to send... > > > > > > >> For those who are familiar with these blocks, in my opinion the > >> JMSEventListener makes use of eventcache capabilities. > >> > >> So I would say, JMS provides callback support via eventcache. > >> > >> What do you think? > > > > It's been a while for since I last worked with it, and I > suppose it is > > targeted for Cocoon 2.2 where my knowledge is mainly 2.1.x, > so I might > > be missing something. Anyway, it is not directly clear for > me what to > > gain with this dependency switch > > > > -Ard > > > >> Regards, > >> Lukas > >> > >> > > > > > > >
