The current 3.2 invokers don't have any notion of client callback. You could make it work if you could guarantee an MBeanServer on the clients (which you cannot).
Otherwise they would need to be modified to target something other than an ObjectName on the MBus. The remoting framework has client callbacks but it is not transparent (at least last time I looked at it). The subsystem has to know what client callbacks are involved. This is very unclean since it depends upon what sort of callback the transport supports (e.g. two-way socket stream like UIL2, two sockets like OIL, RMI or whether the client has to do polling). IMHO, the client callback should be part of the transport layer which knows best how to optimize it. Ideally it should be more transparent like RMI where something that implements java.rmi.Remote is replaced with its remote stub as it passes through the transport layer. Regards, Adrian On Sun, 2003-12-21 at 17:05, Ivelin Ivanov wrote: > Yes, this is how it works now. > The client side of the HAIL uses the singleton > notifications, which in turn use the DRM. > The question is how to implement the client stub so > that it does not have to be part of the cluster. > > The smart RMI stubs take care of communicating with > the back end to receive regular snapshots of the > cluster view. There has to be additinal info about the > current singleton server. As Scott mentioned this can > be probably done as an extension to one of the load > balncing policies. > > However UIL2 does not use the smart RMI stubs. How to > merge them? Just use the RMI stuff for HAIL and don't > worry about UIL2 for now? > > Is the existing remoting at a stage that can replace > UIL2 without any loss of benefits ? I am not familiar > with it yet. > > Ivelin > > > > > > --- Bill Burke <[EMAIL PROTECTED]> wrote: > > The DistributedReplicantManager should be able to > > organize separate > > endpoints. HAIL or any other IL should interface > > with it. > > > > Bill > > > > Ivelin Ivanov wrote: > > > > > Ok, that is what I thought. > > > Let's see if this can be an easy fix. > > > Seems like UIL2 doesn't leverage the smart RMI > > stubs. > > > Any suggestions how to attack this? Have UIL2 use > > > smart RMI stubs somehow, write a completely > > different > > > IL based on the smart RMI stubs or reuse OIL. > > > > > > Currently the HAIL client stub is listening for > > > changes in the cluster topology and cancels the > > > connection when the singleton moves. > > > > > > > > > Ivelin > > > > > > --- Scott M Stark <[EMAIL PROTECTED]> wrote: > > > > > >>Its a variation of the FirstAvailable load > > balancing > > >>policy that > > >>chooses the singleton rather than one of the > > cluster > > >>nodes. > > >> > > >>-- > > >>xxxxxxxxxxxxxxxxxxxxxxxx > > >>Scott Stark > > >>Chief Technology Officer > > >>JBoss Group, LLC > > >>xxxxxxxxxxxxxxxxxxxxxxxx > > >> > > >>Ivelin Ivanov wrote: > > >> > > >> > > >>>An interesting problem came up related to HA JMS. > > >>>There is a need for a remoting mechanism that can > > >> > > >>not > > >> > > >>>only keep a current list of the cluster nodes, > > but > > >>>also know which one is the singleton node for a > > >>>particular service. > > >>> > > >>>Is this something that should be added to the > > >> > > >>roadmap > > >> > > >>>under remoting? Would it be implemented as a kind > > >> > > >>of > > >> > > >>>load-balancing strategy or some other way? > > >>> > > >>>Ivelin > > >>> > > >> > > >> > > >> > > >> > > > > > > ------------------------------------------------------- > > > > > >>This SF.net email is sponsored by: IBM Linux > > >>Tutorials. > > >>Become an expert in LINUX or just sharpen your > > >>skills. Sign up for IBM's > > >>Free Linux Tutorials. Learn everything from the > > >>bash shell to sys admin. > > >>Click now! > > >> > > > > > > > > > http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click > > > > > >>_______________________________________________ > > >>JBoss-Development mailing list > > >>[EMAIL PROTECTED] > > >> > > > > > > > > > https://lists.sourceforge.net/lists/listinfo/jboss-development > > > > > > > > > > > > > > > ------------------------------------------------------- > > > This SF.net email is sponsored by: IBM Linux > > Tutorials. > > > Become an expert in LINUX or just sharpen your > > skills. Sign up for IBM's > > > Free Linux Tutorials. Learn everything from the > > bash shell to sys admin. > > > Click now! > > > http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click > > > _______________________________________________ > > > JBoss-Development mailing list > > > [EMAIL PROTECTED] > > > > > > https://lists.sourceforge.net/lists/listinfo/jboss-development > > > > > > > > > > -- > > ================ > > Bill Burke > > Chief Architect > > JBoss Group LLC. > > ================ > > > > > > > > > ------------------------------------------------------- > > This SF.net email is sponsored by: IBM Linux > > Tutorials. > > Become an expert in LINUX or just sharpen your > > skills. Sign up for IBM's > > Free Linux Tutorials. Learn everything from the > > bash shell to sys admin. > > Click now! > > > http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click > > _______________________________________________ > > JBoss-Development mailing list > > [EMAIL PROTECTED] > > > https://lists.sourceforge.net/lists/listinfo/jboss-development > > > > ------------------------------------------------------- > This SF.net email is sponsored by: IBM Linux Tutorials. > Become an expert in LINUX or just sharpen your skills. Sign up for IBM's > Free Linux Tutorials. Learn everything from the bash shell to sys admin. > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click > _______________________________________________ > JBoss-Development mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-development -- xxxxxxxxxxxxxxxxxxxxxxxx Adrian Brock Director of Support Back Office JBoss Group, LLC xxxxxxxxxxxxxxxxxxxxxxxx ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ JBoss-Development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
