Examples of VectorClock

org.sdnplatform.sync.internal.version.VectorClock
A vector of the number of writes mastered by each node. The vector is stored sparely, since, in general, writes will be mastered by only one node. This means implicitly all the versions are at zero, but we only actually store those greater than zero.
org.syncany.database.VectorClock
Implements a vector clock that records the time stamps of all send and receive events. It contains functions to compare and merge two vector clocks.
Vector clocks are a mechanism to track events/actions across multiple distributed clients. Using vector clocks, one can determine relationships between different events. In particular:
- Event A happened before / was caused by event B (cause)
- Event B happened after / caused event B (effect)
- Event A and B happened simultaneously (no cause/effect relationship)
@author Frits de Nijs @author Peter Dijkshoorn @author Philipp C. Heckel
voldemort.versioning.VectorClock
A vector of the number of writes mastered by each node. The vector is stored sparely, since, in general, writes will be mastered by only one node. This means implicitly all the versions are at zero, but we only actually store those greater than zero.

Examples of voldemort.versioning.VectorClock

            srcGloballyResolvingStoreClient.put(entry.getKey(), entry.getValue());
        }


        // generate a conflict on the primary and a secondary
        List<Integer> nodeList = srcStoreInstance.getReplicationNodeList(srcStoreInstance.getMasterPartitionId(conflictKey.getBytes("UTF-8")));
        VectorClock losingClock = new VectorClock(Lists.newArrayList(new ClockEntry((short) 0, 5)),
                                                  System.currentTimeMillis());
        VectorClock winningClock = new VectorClock(Lists.newArrayList(new ClockEntry((short) 1, 5)),
                                                   losingClock.getTimestamp() + 1);
        srcAdminClient.storeOps.putNodeKeyValue(GLOBALLY_RESOLVING_STORE_NAME,
                                                new NodeValue<ByteArray, byte[]>(nodeList.get(0),
                                                                                 new ByteArray(conflictKey.getBytes("UTF-8")),
                                                                                 new Versioned<byte[]>("losing value".getBytes("UTF-8"),

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Examples of voldemort.versioning.VectorClock


        StoreRoutingPlan srcStoreInstance = new StoreRoutingPlan(srcCluster, nonResolvingStoreDef);


        // generate a conflict on the master partition
        int masterNode = srcStoreInstance.getNodeIdForPartitionId(srcStoreInstance.getMasterPartitionId(conflictKey.getBytes("UTF-8")));
        VectorClock losingClock = new VectorClock(Lists.newArrayList(new ClockEntry((short) 0, 5)),
                                                  System.currentTimeMillis());
        VectorClock winningClock = new VectorClock(Lists.newArrayList(new ClockEntry((short) 1, 5)),
                                                   losingClock.getTimestamp() + 1);
        srcAdminClient.storeOps.putNodeKeyValue(MULTIPLE_VERSIONS_STORE_NAME,
                                                new NodeValue<ByteArray, byte[]>(masterNode,
                                                                                 new ByteArray(conflictKey.getBytes("UTF-8")),
                                                                                 new Versioned<byte[]>("losing value".getBytes("UTF-8"),

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Examples of voldemort.versioning.VectorClock


    @BeforeClass
    public static void oneTimeSetUp() {
        voldemortConfig = VoldemortConfig.loadFromVoldemortHome("config/single_node_rest_server/");
        key = new ByteArray("key1".getBytes());
        vectorClock = new VectorClock();
        vectorClock.incrementVersion(voldemortConfig.getNodeId(), System.currentTimeMillis());
        value = new Versioned<byte[]>("value1".getBytes(), vectorClock);
        server = new VoldemortServer(voldemortConfig);
        if(!server.isStarted())
            server.start();

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