RE: [eclipselink-users] RE: Eclipselink in clustered environment.

[Shashikant Kale <Shashikant.Kale@xxxxxxxxxxxxxxxx>]

Thanks a lot Reinhard.

Appreciate your response. However, I understand I should have been more clear about the environment details in which I am using eclipselink.

We don't have any application server which can provide a JNDI service. However it's a standalone OSGi environment in which eclipselink is a bundle.

Would it still be possible to make it work?

Thanks again,
Shashi

-----Original Message-----
From: eclipselink-users-bounces@xxxxxxxxxxx [mailto:eclipselink-users-bounces@xxxxxxxxxxx] On Behalf Of Reinhard Girstenbrei
Sent: Tuesday, July 20, 2010 10:27
To: eclipselink-users@xxxxxxxxxxx
Subject: [eclipselink-users] RE: Eclipselink in clustered environment.

Hi Shashi,
I had been using the following code for the SessionCustomizer to configure RMI Cache Coordination on WebLogic Server:

public void customize(Session session) throws Exception {
                Server server = (Server) session;
                RemoteCommandManager commandMgr =
                   new RemoteCommandManager((CommandProcessor) server);
                commandMgr.setUrl( System.getProperty("eclipselink.coordination.url"));
                commandMgr.setChannel("EclipseLinkChannel");
                commandMgr.setShouldPropagateAsynchronously(true);
                commandMgr.getDiscoveryManager().setPacketTimeToLive(0);
                RMITransportManager transportManager = new RMITransportManager(commandMgr);
                transportManager.setNamingServiceType(TransportManager.JNDI_NAMING_SERVICE);

            transportManager.setUserName("username");
            transportManager.setEncryptedPassword("password");
            transportManager.setInitialContextFactoryName( "weblogic.jndi.WLInitialContextFactory");
            transportManager.setShouldRemoveConnectionOnError(true);
            commandMgr.setTransportManager(transportManager);
            server.setCommandManager(commandMgr);
            server.setShouldPropagateChanges(true);
            if(server.isConnected ()) {
                server.getCommandManager().initialize();
              }
              else
              {
                server.login();
              }

        }

Using this code I can create a cluster of two WLS server instances running on the same machine.
I just have to setup the right URL for the JNDI lookup for this current CommandManager as a startup java option with
-Declipselink.coordination.url=t3://hostname:port/...

I hope that helps.

Best regards,
Reinhard Girstenbrei

-----Original Message-----
From: eclipselink-users-request@xxxxxxxxxxx [mailto:eclipselink-users-request@xxxxxxxxxxx]
Sent: 16 July 2010 18:00
To: eclipselink-users@xxxxxxxxxxx
Subject: eclipselink-users Digest, Vol 35, Issue 19

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   1. Eclipselink in clustered environment. (Shashikant Kale)


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Message: 1
Date: Fri, 16 Jul 2010 10:58:28 +0530
From: Shashikant Kale <Shashikant.Kale@xxxxxxxxxxxxxxxx>
Subject: [eclipselink-users] Eclipselink in clustered environment.
To: EclipseLink User Discussions <eclipselink-users@xxxxxxxxxxx>
Message-ID: <FDCD1F56CDE47840ADD853365BBE7FEF04C4ACFF1E@indxchange03>
Content-Type: text/plain; charset="us-ascii"

Hello,

I am trying to setup eclipselink in clustered environment. We don't have JMS provider and hence would like to setup RMI based coordination for L2 cache. However I am finding it difficult to make it work. Looking at various examples and eclipselink cache coordination documentation at http://wiki.eclipse.org/Introduction_to_Cache_%28ELUG%29#Cache_Coordination_API wrote following code
 in a SessionCustomizer

            session.setProperty("eclipselink.cache.coordination.protocol", "rmi");
            //Use default EclipseLinkCommandChannel for propagation
            CommandManager cm = new RemoteCommandManager((CommandProcessor)session);
            cm.setShouldPropagateAsynchronously(true);
            DiscoveryManager dm = cm.getDiscoveryManager();
            dm.setAnnouncementDelay(1000);
            dm.setMulticastGroupAddress("224.0.0.1");
            dm.setMulticastPort("2000");
            dm.setPacketTimeToLive(2);

However this doesn't seem to be working. I am sure I am missing something here. Does somebody have a working example of cache coordination setup using RMI?

TIA,
Shashi
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