Examples of org.apache.cassandra.gms.ApplicationState

org.apache.cassandra.gms.ApplicationState
This abstraction represents the state associated with a particular node which an application wants to make available to the rest of the nodes in the cluster. Whenever a piece of state needs to be disseminated to the rest of cluster wrap the state in an instance of ApplicationState and add it to the Gossiper. e.g. if we want to disseminate load information for node A do the following: ApplicationState loadState = new ApplicationState(); Gossiper.instance().addApplicationState("LOAD STATE", loadState);


        // create a ring or 5 nodes
        createInitialRing(ss, partitioner, endPointTokens, keyTokens, hosts, 5);


        // node hosts.get(2) goes jumps to left
        ss.onChange(hosts.get(2), StorageService.MOVE_STATE, new ApplicationState(StorageService.STATE_LEFT + StorageService.Delimiter + partitioner.getTokenFactory().toString(endPointTokens.get(2))));


        assertFalse(tmd.isMember(hosts.get(2)));


        // node hosts.get(4) goes to bootstrap
        ss.onChange(hosts.get(3), StorageService.MOVE_STATE, new ApplicationState(StorageService.STATE_BOOTSTRAPPING + StorageService.Delimiter + partitioner.getTokenFactory().toString(keyTokens.get(1))));


        assertFalse(tmd.isMember(hosts.get(3)));
        assertTrue(tmd.getBootstrapTokens().size() == 1);
        assertTrue(tmd.getBootstrapTokens().get(keyTokens.get(1)).equals(hosts.get(3)));


        // and then directly to 'left'
        ss.onChange(hosts.get(2), StorageService.MOVE_STATE, new ApplicationState(StorageService.STATE_LEFT + StorageService.Delimiter + partitioner.getTokenFactory().toString(keyTokens.get(1))));


        assertTrue(tmd.getBootstrapTokens().size() == 0);
        assertFalse(tmd.isMember(hosts.get(2)));
        assertFalse(tmd.isLeaving(hosts.get(2)));

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        }


        for (int i=0; i<endPointTokens.size(); i++)
        {
            InetAddress ep = InetAddress.getByName("127.0.0." + String.valueOf(i + 1));
            ss.onChange(ep, StorageService.MOVE_STATE, new ApplicationState(StorageService.STATE_NORMAL + StorageService.Delimiter + partitioner.getTokenFactory().toString(endPointTokens.get(i))));
            hosts.add(ep);
        }


        // check that all nodes are in token metadata
        for (int i=0; i<endPointTokens.size(); ++i)

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        InetAddress myEndpoint = InetAddress.getByName("127.0.0.1");
        Range range3 = ss.getPrimaryRangeForEndPoint(three);
        Token fakeToken = ((IPartitioner)StorageService.getPartitioner()).midpoint(range3.left, range3.right);
        assert range3.contains(fakeToken);
        ss.onChange(myEndpoint, StorageService.MOVE_STATE, new ApplicationState(StorageService.STATE_BOOTSTRAPPING + StorageService.Delimiter + ss.getPartitioner().getTokenFactory().toString(fakeToken)));
        tmd = ss.getTokenMetadata();


        InetAddress source2 = BootStrapper.getBootstrapSource(tmd, load);
        assert two.equals(source2) : source2;
    }

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Related Classes of org.apache.cassandra.gms.ApplicationState

org.apache.cassandra.db.migration.Migration

org.apache.cassandra.dht.BootStrapperTest

org.apache.cassandra.service.LeaderElector

org.apache.cassandra.service.LoadDisseminator

org.apache.cassandra.service.MigrationManager

org.apache.cassandra.service.MoveTest

org.apache.cassandra.service.StorageLoadBalancer

org.apache.cassandra.service.StorageService

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