Examples of com.linkedin.d2.balancer.strategies.LoadBalancerStrategy

Package com.linkedin.d2.balancer.strategies

Examples of com.linkedin.d2.balancer.strategies.LoadBalancerStrategy

com.linkedin.d2.balancer.strategies.LoadBalancerStrategy
Interface for a strategy to choose a client given a list of clients. @author David Hoa (dhoa@linkedin.com) @author Oby Sumampouw (osumampouw@linkedin.com)

                                                            null,
                                                            null,
                                                            schemes,
                                                            null));


    LoadBalancerStrategy strategy = _state.getStrategy("service-1", "http");


    assertNotNull(strategy);
    assertTrue(strategy instanceof RandomLoadBalancerStrategy);
  }

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                                                            schemes,
                                                            null));


    assertNotNull(_state.getStrategy("service-1", "http"));


    LoadBalancerStrategy strategy = _state.getStrategy("service-1", "http");


    assertNotNull(strategy);
    assertTrue(strategy instanceof RandomLoadBalancerStrategy);


    // check that we're getting the exact same strategy (by pointer) every time
    assertTrue(strategy == _state.getStrategy("service-1", "http"));
    assertTrue(strategy == _state.getStrategy("service-1", "http"));


    // now make sure adding a cluster property won't change the strategy
    _clusterRegistry.put("cluster-1", new ClusterProperties("cluster-1"));


    // we should still have the same strategy now
    LoadBalancerStrategy newStrategy = _state.getStrategy("service-1", "http");
    assertNotNull(newStrategy);
    assertTrue(strategy == newStrategy);
    assertTrue(newStrategy instanceof RandomLoadBalancerStrategy);


    strategy = newStrategy;

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                                                            schemes,
                                                            null));


    _clusterRegistry.put("cluster-1", new ClusterProperties("cluster-1"));


    LoadBalancerStrategy strategy = _state.getStrategy("service-1", "http");


    assertNotNull(strategy);
    assertTrue(strategy instanceof RandomLoadBalancerStrategy);


    // now add the degraderV3 strategy into the Strategy list

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                                                              Collections.<String, Object>emptyMap(),
                                                              Collections.<String, String>emptyMap(),
                                                              schemes,
                                                              Collections.<URI>emptySet()));


    LoadBalancerStrategy strategy = _state.getStrategy("service-1", "http");
    assertNotNull(strategy, "got null strategy in setup");


    // test serial to make sure things are working before concurrent test
    TransportClient resultTC = _state.getClient("service-1", "http");
    assertNotNull(resultTC, "got null tracker client in non-concurrent env");

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    foo6Data.put(1, new PartitionData(1.0));
    partitionDescriptions.put(foo6, foo6Data);


    //setup strategy which involves tweaking the hash ring to get partitionId -> URI host
    List<LoadBalancerState.SchemeStrategyPair> orderedStrategies = new ArrayList<LoadBalancerState.SchemeStrategyPair>();
    LoadBalancerStrategy strategy = new TestLoadBalancerStrategy(partitionDescriptions);


    orderedStrategies.add(new LoadBalancerState.SchemeStrategyPair("http", strategy));


    //setup the partition accessor which is used to get partitionId -> keys
    PartitionAccessor accessor = new TestPartitionAccessor();

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    foo6Data.put(1, new PartitionData(1.0));
    partitionDescriptions.put(foo6, foo6Data);


    //setup strategy which involves tweaking the hash ring to get partitionId -> URI host
    List<LoadBalancerState.SchemeStrategyPair> orderedStrategies = new ArrayList<LoadBalancerState.SchemeStrategyPair>();
    LoadBalancerStrategy strategy = new TestLoadBalancerStrategy(partitionDescriptions);


    orderedStrategies.add(new LoadBalancerState.SchemeStrategyPair("http", strategy));


    //setup the partition accessor which is used to get partitionId -> keys
    PartitionAccessor accessor = new TestPartitionAccessor();

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    bar3Data.put(1, new PartitionData(1.0));
    partitionDescriptions.put(bar3, bar3Data);


    //setup strategy which involves tweaking the hash ring to get partitionId -> URI host
    List<LoadBalancerState.SchemeStrategyPair> orderedStrategies = new ArrayList<LoadBalancerState.SchemeStrategyPair>();
    LoadBalancerStrategy strategy = new LoadBalancerStrategy()
    {
      @Override
      public TrackerClient getTrackerClient(Request request,
          RequestContext requestContext,
          long clusterGenerationId,

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    List<TrackerClient> clientsToLoadBalance = null;


    for (LoadBalancerState.SchemeStrategyPair pair : orderedStrategies)
    {
      LoadBalancerStrategy strategy = pair.getStrategy();
      String scheme = pair.getScheme();




      clientsToLoadBalance = getPotentialClients(serviceName, serviceProperties, uris, scheme,
                                                                     partitionId);


      trackerClient =
          strategy.getTrackerClient(request, requestContext, uriItem.getVersion(), partitionId, clientsToLoadBalance);


      debug(_log,
            "load balancer strategy for ",
            serviceName,
            " returned: ",

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    partitionDescriptions.put(server3, server3Data);




    //setup strategy which involves tweaking the hash ring to get partitionId -> URI host
    List<LoadBalancerState.SchemeStrategyPair> orderedStrategies = new ArrayList<LoadBalancerState.SchemeStrategyPair>();
    LoadBalancerStrategy strategy = new TestLoadBalancerStrategy(partitionDescriptions);


    orderedStrategies.add(new LoadBalancerState.SchemeStrategyPair("http", strategy));


    //setup the partition accessor which is used to get partitionId -> keys
    PartitionAccessor accessor = new TestPartitionAccessor();

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    partitionDescriptions.put(server3, server3Data);




    //setup strategy which involves tweaking the hash ring to get partitionId -> URI host
    List<LoadBalancerState.SchemeStrategyPair> orderedStrategies = new ArrayList<LoadBalancerState.SchemeStrategyPair>();
    LoadBalancerStrategy strategy = new TestLoadBalancerStrategy(partitionDescriptions);


    orderedStrategies.add(new LoadBalancerState.SchemeStrategyPair("http", strategy));


    //setup the partition accessor which is used to get partitionId -> keys
    PartitionAccessor accessor = new TestPartitionAccessor();

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