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 jmt.gui.common.routingStrategies.RoutingStrategy
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640           model.setRoutingStrategy(key, classes.get(className2), engineToGuiRouting.get(routStratKey).clone());
        }
      }


      // Treat particular case of Empirical (Probabilities) Routing
      RoutingStrategy rs = (RoutingStrategy) model.getRoutingStrategy(key, classes.get(className2));
      if (rs instanceof ProbabilityRouting) {
        // Creates a Vector of all empirical entris. Could not be done automaticly
        // for the above problem with array (see parseParameterRefclassArray)
        Vector<Node> entries = new Vector<Node>();
        // Finds EntryArray node

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Examples of jmt.gui.common.routingStrategies.RoutingStrategy
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213     }


    // Now adjusts Empirical Routing (if any) - Now named Probability Routing
    keys = tempkey.keySet().iterator();
    Object[] classes;
    RoutingStrategy rs;
    Map oldRouting, newRouting;
    // Search in every new inserted station
    while (keys.hasNext()) {
      newkey = tempkey.get(keys.next());
      classes = mediator.getClassDefinition().getClassKeys().toArray();
      for (Object classe : classes) {
        rs = (RoutingStrategy) mediator.getStationDefinition().getRoutingStrategy(newkey, classe);
        if (rs instanceof ProbabilityRouting) {
          oldRouting = rs.getValues();
          newRouting = new HashMap();
          // For each old destination, set new one if it was copied with
          Object[] oldDest = oldRouting.keySet().toArray();
          for (Object element : oldDest) {
            // Now checks if target station was copied with source one and a link connecting them exists
            if (tempkey.containsKey(element) && mediator.getStationDefinition().areConnected(newkey, tempkey.get(element))) {
              newRouting.put(tempkey.get(element), oldRouting.get(element));
            }
          }
          rs.getValues().clear();
          rs.getValues().putAll(newRouting);
        }
      }
    }


    // Selects every inserted element

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Examples of org.axonframework.commandhandling.distributed.RoutingStrategy
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64 
        connector = new JGroupsConnector(channel,
                                         "testing",
                                         new SimpleCommandBus(),
                                         new XStreamSerializer());
        dcb = new DistributedCommandBus(connector, new RoutingStrategy() {
            @Override
            public String getRoutingKey(CommandMessage<?> command) {
                return command.getPayload().toString();
            }
        });

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Examples of voldemort.routing.RoutingStrategy
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public class ConfigureNodesTest extends AbstractActionTest {


    @Test
    public void testConfigureNodes() throws Exception {
        RoutingStrategy routingStrategy = new RouteToAllStrategy(cluster.getNodes());
        BasicPipelineData<byte[]> pipelineData = new BasicPipelineData<byte[]>();
        ConfigureNodes<byte[], BasicPipelineData<byte[]>> action = new ConfigureNodes<byte[], BasicPipelineData<byte[]>>(pipelineData,
                                                                                                                         Event.COMPLETED,
                                                                                                                         failureDetector,
                                                                                                                         1,

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Examples of voldemort.routing.RoutingStrategy
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68         assertEquals(cluster.getNodes().size(), pipelineData.getNodes().size());
    }


    @Test(expected = InsufficientOperationalNodesException.class)
    public void testConfigureNodesNotEnoughNodes() throws Exception {
        RoutingStrategy routingStrategy = new RouteToAllStrategy(cluster.getNodes());
        BasicPipelineData<byte[]> pipelineData = new BasicPipelineData<byte[]>();
        ConfigureNodes<byte[], BasicPipelineData<byte[]>> action = new ConfigureNodes<byte[], BasicPipelineData<byte[]>>(pipelineData,
                                                                                                                         Event.COMPLETED,
                                                                                                                         failureDetector,
                                                                                                                         cluster.getNodes()

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Examples of voldemort.routing.RoutingStrategy
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91             fail();
    }


    @Test
    public void testConfigureNodesWithZones() throws Exception {
        RoutingStrategy routingStrategy = new ZoneRoutingStrategy(clusterWithZones,
                                                                  storeDef.getZoneReplicationFactor(),
                                                                  storeDef.getReplicationFactor());


        BasicPipelineData<byte[]> pipelineData = new BasicPipelineData<byte[]>();
        Pipeline pipeline = new Pipeline(Operation.PUT, 10000, TimeUnit.MILLISECONDS);

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Examples of voldemort.routing.RoutingStrategy
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public class GetAllConfigureNodesTest extends AbstractActionTest {


    @Test
    public void testConfigureNodes() throws Exception {
        RoutingStrategy routingStrategy = new RouteToAllStrategy(cluster.getNodes());
        GetAllPipelineData pipelineData = new GetAllPipelineData();
        List<ByteArray> keys = new ArrayList<ByteArray>();


        for(int i = 0; i < 10; i++)
            keys.add(TestUtils.toByteArray("key-" + i));


        int preferred = cluster.getNumberOfNodes() - 1;


        GetAllConfigureNodes action = new GetAllConfigureNodes(pipelineData,
                                                               Event.COMPLETED,
                                                               failureDetector,
                                                               preferred,
                                                               preferred - 1,
                                                               routingStrategy,
                                                               keys,
                                                               null,
                                                               null,
                                                               null);


        Pipeline pipeline = new Pipeline(Operation.GET, 10000, TimeUnit.MILLISECONDS);
        pipeline.addEventAction(Event.STARTED, action);
        pipeline.addEvent(Event.STARTED);
        pipeline.execute();


        if(pipelineData.getFatalError() != null)
            throw pipelineData.getFatalError();


        for(ByteArray key: keys) {
            List<Node> allNodesList = routingStrategy.routeRequest(key.get());
            assertEquals(cluster.getNumberOfNodes(), allNodesList.size());


            List<Node> extraNodes = pipelineData.getKeyToExtraNodesMap().get(key);
            assertEquals(cluster.getNumberOfNodes() - preferred, extraNodes.size());


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Examples of voldemort.routing.RoutingStrategy
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110             failureDetector.recordException(node,
                                            0,
                                            new UnreachableStoreException("Test for "
                                                                          + getClass().getName()));


        RoutingStrategy routingStrategy = new RouteToAllStrategy(cluster.getNodes());
        GetAllPipelineData pipelineData = new GetAllPipelineData();


        GetAllConfigureNodes action = new GetAllConfigureNodes(pipelineData,
                                                               Event.COMPLETED,
                                                               failureDetector,

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Examples of voldemort.routing.RoutingStrategy
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288      * Checks if each node has the keys it is reponsible for returns false
     * otherwise
     */
    public boolean verifyKeysExist(int nodeIdToVerifyOn) {
        RoutingStrategyFactory factory = new RoutingStrategyFactory();
        RoutingStrategy storeRoutingStrategy = factory.updateRoutingStrategy(storeDef,
                                                                             adminClient.getAdminClientCluster());


        HashMap<Integer, ArrayList<String>> expectedNodeIdToKeys;
        expectedNodeIdToKeys = new HashMap();
        Collection<Node> nodesInCluster = adminClient.getAdminClientCluster().getNodes();
        for(Node node: nodesInCluster) {
            ArrayList<String> keysForNode = new ArrayList();
            expectedNodeIdToKeys.put(node.getId(), keysForNode);
        }
        for(int i = 0; i < NUM_KEYS_1; i++) {
            String key = i + "";
            String value = key;
            List<Node> nodeList = storeRoutingStrategy.routeRequest(key.getBytes());
            for(Node node: nodeList) {
                ArrayList<String> keysForNode = expectedNodeIdToKeys.get(node.getId());
                keysForNode.add(key);
            }
        }
 

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Examples of voldemort.routing.RoutingStrategy
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146                               StoreDefinition storeDef) {
        for(int i = 0; i < LOOP_COUNT;) {
            ByteArray key = new ByteArray(ByteUtils.md5(Integer.toString((int) (Math.random() * Integer.MAX_VALUE))
                                                               .getBytes()));
            byte[] value = "value".getBytes();
            RoutingStrategy routingStrategy = new RoutingStrategyFactory().updateRoutingStrategy(storeDef,
                                                                                                 metadata.getCluster());


            if(containsNodeId(routingStrategy.routeRequest(key.get()), nodeId)) {
                i++; // increment count
                switch(i % 4) {
                    case 0:
                        store.get(key, null);
                        break;
 

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