You can also use OSCache with Cayenne and have the cached queries expire frequently, i.e. after 30 seconds
regards Malcolm Edgar On Thu, Jul 30, 2009 at 6:36 AM, Mike Kienenberger<mkien...@gmail.com> wrote: > Before you make your own custom solution, you might want to read up on > Javagroup. It might not be a problem to use it in your environment. > > The main page starts off with this: > > http://www.jgroups.org/ > ================================== > JGroups is a toolkit for reliable multicast communication. > (Note that this doesn't necessarily mean IP Multicast, JGroups can > also use transports such as TCP). > > [...] > > JGroups comes with a number of protocols (but anyone can write their > own), for example > * Transport protocols: UDP (IP Multicast), TCP, JMS > > ================================== > > So even if the TCP version doesn't do what you need, you might find it > easier to write your own Jgroup protocol than to write your own > cayenne event bridge. It's more likely to be documented and there > will be more examples/end users to ask questions of. There might even > be a tomcat shared session protocol out there somewhere. > > > On Wed, Jul 29, 2009 at 4:16 PM, Tobias > Schoessler<tobias.schoess...@gmail.com> wrote: >> well i am reading this from the documentation: >> >> "... At the minimum, JMS setup requires a JMS server running, and subjects >> for each of the DataDomains to be configured. JavaGroups is peer-to-peer >> library that is embedded into applications. Default configuration provided >> by CayenneModeler will work out of the box, provided that IP multicast is >> enabled on the network." >> >> for the JMS solution the JMS server setup is a problem >> for the JavaGroups setup the "IP multicast is enabled on the network." is a >> problem >> >> so for the custom tranport mechanism that you mentioned I stumbled upon >> this here >> >> http://jee-bpel-soa.blogspot.com/2009/06/session-sharing-in-apache-tomcat.html >> >> which seems to describe cross context data sharing on tomcat web contexts >> >> but is there any code to look at to see how a custom transport mechanism can >> be setup? >> >> Tobias >> >> >> On Wed, Jul 29, 2009 at 8:28 PM, Mike Kienenberger <mkien...@gmail.com>wrote: >> >>> I've never set it up, but it's easily configurable. >>> >>> If you don't like the javagroups or JMS methodologies, you can define >>> your own -- I don't know what tomcat app-data-sharing ability is >>> available -- it probably depends on the container, but I don't >>> remember reading about any in the past. >>> >>> However, the docs seem to indicate that using Javagroups is pretty >>> painless with no external configuration to deal with. >>> >>> I have a Cayenne 1.1.x application I wrote that used remote >>> notification internally to broadcast events between sessions, so I >>> know it's not difficult to set up and define your own event >>> broadcaster. My guess is that doing it for javagroups is pretty easy >>> since it sounds like a matter of just filling in the forms on the >>> modeler. >>> >>> On Wed, Jul 29, 2009 at 2:15 PM, Tobias >>> Schoessler<tobias.schoess...@gmail.com> wrote: >>> > Thanks Mike, >>> > >>> > so the answer is yes, this can only be done using remote notification? is >>> > this correct? >>> > >>> > Isn't there a way to share the cache among two web application scopes >>> > without going through the hassle of setting up remote notification? >>> > >>> > When the two webapps are running on the same physical machine, inside the >>> > same application server this seems overkill. >>> > >>> > Tobias >>> > >>> > On Wed, Jul 29, 2009 at 6:50 PM, Mike Kienenberger <mkien...@gmail.com >>> >wrote: >>> > >>> >> Yes, >>> >> >>> >> Here's a Cayenne 2.0 document on it: >>> >> >>> >> http://cayenne.apache.org/doc20/configuring-caching-behavior.html >>> >> >>> >> For 3.0: >>> >> >>> >> http://cayenne.apache.org/doc/configuring-caching-behavior.html >>> >> >>> >> On Wed, Jul 29, 2009 at 12:46 PM, Tobias >>> >> Schoessler<tobias.schoess...@gmail.com> wrote: >>> >> > Hi, >>> >> > >>> >> > is it possible to sync the cayenne cache of two web applications >>> running >>> >> in >>> >> > the same tomcat? >>> >> > >>> >> > I observe one web app showing outdated data when the other is >>> committing >>> >> > updates. Both apps are using the same mapping configuration. >>> >> > >>> >> > Do I need to use remote notification for this? >>> >> > >>> >> > thanks >>> >> > >>> >> > Tobias >>> >> > >>> >> >>> > >>> >> >
