Examples of RoutingStrategy

com.nokia.dempsy.router.RoutingStrategy
A {@link RoutingStrategy} is responsible for determining how to find the appropriateNode within a given cluster given a {@link MessageKey}. It has both an {@link Inbound}side and an {@link Outbound} side that work together using the {@link MpCluster} todo the bookkeeping necessary.

A simple example would be: a non-elastic, fixed-width cluster {@link RoutingStrategy} thatsimply selects the Node to send a message to based on the mod ('%' operator) of the hash of a message's key with the number of nodes in the cluster.
In this example the {@link Inbound} strategy, which would be instantiated in each node,would be implemented to register the its current Node with the {@link MpCluster}. The {@link Outbound}side would use the registered information to select the appropriate Node. As mentioned, RoutingStrategy implementations need to be balanced. The {@link Inbound} cansafely assume that the {@link Outbound} created from the same strategy was responsible for setting up the cluster. {@link Inbound} and {@link Outbound} need to be thought of in terms of the stages of apipeline in a Dempsy application. E.g.: Adaptor --> inbound1|Stage1|outbound2 --> inbound2|Stage2|outbound3 ... Notice that outbound2 and inbound2 require coordination and are therefore defined in the {@link ApplicationDefinition} using a single {@link RoutingStrategy} aspart of the {@link ClusterDefinition} that defines Stage2 As an example, the DecentralizedRoutingStrategy's Inbound and Outbound coordinate through the cluster. The Inbound side negotiates for slot ownership and those slots contain enough information for the Outbound side Implementations must be able to handle multi-threaded access.



jmt.gui.common.routingStrategies.RoutingStrategy

Created by IntelliJ IDEA. User: orsotronIII Date: 6-lug-2005 Time: 16.29.02 To change this template use Options | File Templates. Modified by Bertoli Marco Modified by Francesco D'Aquino



org.axonframework.commandhandling.distributed.RoutingStrategy

Interface describing a mechanism that generates a routing key for a given command. Commands that should be handled by the same segment, should result in the same routing key.
@author Allard Buijze
@since 2.0



voldemort.routing.RoutingStrategy

A routing strategy maps puts and gets to an ordered "preference list" of servers. The preference list is the order under which operations will be completed in the absence of failures.




Examples of voldemort.routing.RoutingStrategy
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            HashMap<ByteArray, byte[]> primaryEntriesMoved = Maps.newHashMap();
            HashMap<ByteArray, byte[]> secondaryEntriesMoved = Maps.newHashMap();
            HashMap<ByteArray, byte[]> tertiaryEntriesMoved = Maps.newHashMap();


            RoutingStrategy strategy = new RoutingStrategyFactory().updateRoutingStrategy(storeDef2,
                                                                                          currentCluster);
            for(Entry<ByteArray, byte[]> entry: entrySet.entrySet()) {
                storeClient1.put(new String(entry.getKey().get()), new String(entry.getValue()));
                storeClient2.put(new String(entry.getKey().get()), new String(entry.getValue()));
                List<Integer> pList = strategy.getPartitionList(entry.getKey().get());
                if(primaryPartitionsMoved.contains(pList.get(0))) {
                    primaryEntriesMoved.put(entry.getKey(), entry.getValue());
                } else if(secondaryPartitionsMoved.contains(pList.get(0))) {
                    secondaryEntriesMoved.put(entry.getKey(), entry.getValue());
                } else if(tertiaryPartitionsMoved.contains(pList.get(0))) {

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Examples of voldemort.routing.RoutingStrategy
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190             node = cluster.getNodeById(nodeId);
        } catch(VoldemortException e) {
            Utils.croak("Can't find a node with id " + nodeId);
        }


        RoutingStrategy routingStrategy = new RoutingStrategyFactory().updateRoutingStrategy(storeDefinition,
                                                                                             cluster);
        try {
            new RequestFileFilter(storeDefinition,
                                  routingStrategy,
                                  inputFile,

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Examples of voldemort.routing.RoutingStrategy
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299         // and have rolled back the updates
        return false;
    }


    public List<Node> getResponsibleNodes(K key) {
        RoutingStrategy strategy = (RoutingStrategy) store.getCapability(StoreCapabilityType.ROUTING_STRATEGY);
        @SuppressWarnings("unchecked")
        Serializer<K> keySerializer = (Serializer<K>) store.getCapability(StoreCapabilityType.KEY_SERIALIZER);
        return strategy.routeRequest(keySerializer.toBytes(key));
    }

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Examples of voldemort.routing.RoutingStrategy
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740         // acquire read lock
        readLock.lock();
        try {
            Map<String, RoutingStrategy> routingStrategyMap = (Map<String, RoutingStrategy>) metadataCache.get(ROUTING_STRATEGY_KEY)
                                                                                                          .getValue();
            RoutingStrategy strategy = routingStrategyMap.get(storeName);
            if(strategy == null) {
                Map<String, RoutingStrategy> systemRoutingStrategyMap = (Map<String, RoutingStrategy>) metadataCache.get(SYSTEM_ROUTING_STRATEGY_KEY)
                                                                                                                    .getValue();
                strategy = systemRoutingStrategyMap.get(storeName);
            }

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Examples of voldemort.routing.RoutingStrategy
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791                                    new Versioned<Object>(routingStrategyMap,
                                                         clock.incremented(getNodeId(),
                                                                           System.currentTimeMillis())));


            for(String storeName: storeNameTolisteners.keySet()) {
                RoutingStrategy updatedRoutingStrategy = routingStrategyMap.get(storeName);
                if(updatedRoutingStrategy != null) {
                    try {
                        for(MetadataStoreListener listener: storeNameTolisteners.get(storeName)) {
                            listener.updateRoutingStrategy(updatedRoutingStrategy);
                            listener.updateStoreDefinition(storeDefMap.get(storeName));

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Examples of voldemort.routing.RoutingStrategy
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223                 Utils.croak("No store found with name \"" + storeName + "\"");


            if(!outputDir.exists())
                Utils.croak("Directory \"" + outputDir.getAbsolutePath() + "\" does not exist.");


            RoutingStrategy routingStrategy = new RoutingStrategyFactory().updateRoutingStrategy(storeDef,
                                                                                                 cluster);


            new JsonStoreBuilder(reader,
                                 cluster,
                                 storeDef,

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Examples of voldemort.routing.RoutingStrategy
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644                 datas[partitionId][chunk].close();
            }
        }


        // Start moving files over to their correct node
        RoutingStrategy strategy = new RoutingStrategyFactory().updateRoutingStrategy(storeDefinition,
                                                                                      cluster);
        Map<Integer, Integer> replicaMapping = cluster.getPartitionIdToNodeIdMap();
        for(File file: tempDirectory.listFiles()) {
            String fileName = file.getName();
            if(fileName.matches("^[\\d]+_[\\d]+_[\\d]+\\.(data|index)")) {
                String[] props = fileName.split("_");
                int partitionId = Integer.parseInt(props[0]);
                int replicaType = Integer.parseInt(props[1]);
                int nodeId = replicaMapping.get(strategy.getReplicatingPartitionList(partitionId)
                                                        .get(replicaType));


                Utils.move(file, new File(nodeDirs.get(nodeId), fileName));
            }
        }

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Examples of voldemort.routing.RoutingStrategy
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86     public Map<ByteArray, List<Versioned<byte[]>>> getAll(Iterable<ByteArray> keys,
                                                          Map<ByteArray, byte[]> transforms)
            throws VoldemortException {
        StoreUtils.assertValidKeys(keys);
        StoreUtils.assertValidNode(metadata, nodeId);
        RoutingStrategy routingStrategy = metadata.getRoutingStrategy(getName());
        Node node = metadata.getCluster().getNodeById(nodeId);
        for(ByteArray key: keys)
            StoreUtils.assertValidMetadata(key, routingStrategy, node);


        return getInnerStore().getAll(keys, transforms);

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Examples of voldemort.routing.RoutingStrategy
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            File baseDir = TestUtils.createTempDir();
            JsonReader reader = ReadOnlyStorageEngineTestInstance.makeTestDataReader(testEntries,
                                                                                     baseDir);


            RoutingStrategy router = new RoutingStrategyFactory().updateRoutingStrategy(storeDef,
                                                                                        cluster);


            File outputDir = TestUtils.createTempDir(baseDir);
            JsonStoreBuilder storeBuilder = new JsonStoreBuilder(reader,
                                                                 cluster,

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Examples of voldemort.routing.RoutingStrategy
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554     }


    public static ByteArray generateRandomKey(Cluster cluster, Integer nodeId, Integer replicationFactor) {
        for(;;) {
            byte[] candidate = TestUtils.randomString("ABCDEFGHIJKLMN", 10).getBytes();
            RoutingStrategy rs = new ConsistentRoutingStrategy(cluster, replicationFactor);
            List<Node> routes = rs.routeRequest(candidate);
            if(routes.get(0).getId() == nodeId) {
                ByteArray key = new ByteArray(candidate);
                return key;
            }
        }

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