The debug output will show the cache events being handled such as read and gets from the cache.
Jason On Wed, 2004-04-21 at 09:53, Enrique Medina wrote: > What do you exactly want to log? What do you want me to show about the > logging messages? > > > >From: Jason McKerr <[EMAIL PROTECTED]> > >Reply-To: "OJB Users List" <[EMAIL PROTECTED]> > >To: OJB Users List <[EMAIL PROTECTED]> > >Subject: Re: Clustered cache with OSCache & JavaGroups > >Date: Wed, 21 Apr 2004 08:20:56 -0700 > > > >Can you add the a line to your/a log4j properties files that lowers the > >debug level? It would look like: > > > >log4j.category.com.opensymphony.oscache=DEBUG > > > > > >On Wed, 2004-04-21 at 07:58, Enrique Medina wrote: > > > Hi, > > > > > > I have developed a web application with OJB, as the ORM for data access. > >But > > > now, I want to use OJB in a clustered environment. I have read with > > > attention the information provided at the web: > > > > > > http://db.apache.org/ojb/howto-work-with-clustering.html > > > > > > with respect to setting up OSCache to work with OJB in a cluster. I have > > > strictly followed all the steps commented in this tutorial, and have > >made a > > > little client test application to see the results. Everything seems to > >start > > > perfectly, but no cache communication exists between two instances of > >this > > > client test application at all! > > > > > > I am using OJB RC6 with latest version of OSCache & JavaGroups deployed > > > within OSCache distribution. I have a simple test application consisting > >of: > > > > > > 1 public static void main(String[] args) > > > 2 { > > > 3 // Obtain a connection through OJB broker. > > > 4 PersistenceBroker broker = > > > PersistenceBrokerFactory.defaultPersistenceBroker(); > > > 5 > > > 6 // Create a new query by example that should return all clients. > > > 7 Query query = QueryFactory.newQueryByExample(new ClientVO()); > > > 8 Collection clients = broker.getCollectionByQuery(query); > > > 9 > > > 10 // Ask again for the collection of clients. > > > 11 Collection againClients = broker.getCollectionByQuery(query); > > > 12 } > > > > > > I set a breakpoint on lines 8 and 11, just before obtaining the clients > >for > > > the first time and for the second time. > > > > > > The sequence of steps I follow to see if two instances of the program > > > communicate at cache level through JavaGroups are: > > > > > > 1) I run a first instance of this test application > > > 1.1) The thread of execution gets stopped on line 4 (first > >instance). > > > The JavaGroups logging says -- A new member at address > >'192.168.0.1:1590' > > > has joined the cluster > > > > > > 2) Then I run a second instance of the application > > > 2.1) The thread of execution gets stopped on line 4 (second > >instance). I > > > see on the console how the first instance is notified that the second > > > instance has joined the cluster (JavaGroups logging -- A new member at > > > address '192.168.0.1:1593' has joined the cluster). > > > > > > 1.2) I obtain the collection of clients for the first time on first > > > instance, so all the object are cached. > > > > > > 2.2) I obtain the collection of clients for the first time on second > > > instance. But objects are not retrieved from the cache (which is > >supposed to > > > be shared with the first instance); instead they are cached again (as if > >it > > > was a local cache for the instance). > > > > > > 1.3) I obtain again the collection of clients for the second time on > > > first instance. Now the objects are retrieved from the cache (but as a > >local > > > cache only available to the first instance) > > > > > > 2.3) I obtain again the collection of clients for the second time on > > > second instance. Now the objects are retrieved from the cache (but as a > > > local cache only available to the second instance). > > > > > > So this is my simulation of a clustered environment with two instances > >of > > > the same test application. And of course I don't get the behaviour I > > > expected to. > > > > > > Am i doing something worng? And I missunderstanding something? Can this > >kind > > > of test be done, as reflected on the documentation from OJB web? > > > > > > Patiently observing the console, it seems that on every instance a new > > > JavaGroups broadcasting listener is created: > > > > > > INFO [main] (Config.java:146) - Properties > > > {cache.algorithm=com.opensymphony.oscache.base.algorithm.LRUCache, > > > cache.capacity=1000, cache.unlimited.disk=false, > > > > >cache.event.listeners=com.opensymphony.oscache.plugins.clustersupport.JavaGroupsBroadcastingListener} > > > INFO [main] (GeneralCacheAdministrator.java:98) - Constructed > > > GeneralCacheAdministrator() > > > INFO [main] (GeneralCacheAdministrator.java:293) - Creating new cache > > > INFO [main] (AbstractBroadcastingListener.java:35) - > > > AbstractBroadcastingListener registered > > > INFO [main] (JavaGroupsBroadcastingListener.java:91) - Starting a new > > > JavaGroups broadcasting listener with > > > > >properties=UDP(mcast_addr=231.12.21.132;mcast_port=45566;ip_ttl=32;mcast_send_buf_size=150000;mcast_recv_buf_size=80000):PING(timeout=2000;num_initial_members=3):MERGE2(min_interval=5000;max_interval=10000):FD_SOCK:VERIFY_SUSPECT(timeout=1500):pbcast.NAKACK(gc_lag=50;retransmit_timeout=300,600,1200,2400,4800):pbcast.STABLE(desired_avg_gossip=20000):UNICAST(timeout=5000):FRAG(frag_size=8096;down_thread=false;up_thread=false):pbcast.GMS(join_timeout=5000;join_retry_timeout=2000;shun=false;print_local_addr=true) > > > > > > ------------------------------------------------------- > > > GMS: address is 192.168.0.1:1590 > > > ------------------------------------------------------- > > > INFO [main] (JavaGroupsBroadcastingListener.java:99) - JavaGroups > >clustering > > > support started successfully > > > INFO [PullPushAdapterThread] (JavaGroupsBroadcastingListener.java:166) - > >A > > > new member at address '192.168.0.1:1590' has joined the cluster > > > > > > so this can be maybe the problem ... But I confess I have no idea ... > > > > > > Thanks in advance, > > > Enrique Medina. > > > > > > _________________________________________________________________ > > > Correos más divertidos con fotos y textos increíbles en MSN 8. Pruébalo > > > gratis dos meses. http://join.msn.com/?pgmarket=es-es&XAPID=45&DI=1055 > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > >--------------------------------------------------------------------- > >To unsubscribe, e-mail: [EMAIL PROTECTED] > >For additional commands, e-mail: [EMAIL PROTECTED] > > > > _________________________________________________________________ > Encuentra a tu media naranja entre los perfiles que más te gusten. Toda la > magia del romance en MSN Amor & Amistad. http://match.msn.es/ > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
