Package com.linkedin.d2.balancer.simple

Examples of com.linkedin.d2.balancer.simple.SimpleLoadBalancerState$ClusterLoadBalancerSubscriber

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    // write D2-related configuration to ZooKeeper
    // all the configuration here are permanent, no need to re-write as long as ZooKeeper still has the data
    // therefore in real case, do this "discovery" step separately

    final HttpServer server = RestLiExampleBasicServer.createServer();
    final ZooKeeperConnectionManager zkConn = createZkConn();

    startServer(server, zkConn);

    System.out.println("Example server with D2 is running with URL " + RestLiExampleBasicServer.getServerUrl() + ". Press any key to stop server.");
    System.in.read();
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    TogglingPublisher<UriProperties> uriToggle = _factory.createUriToggle(zkUriRegistry, fsUriStore, uriBus);

    SimpleLoadBalancerState state = new SimpleLoadBalancerState(
            executorService, uriBus, clusterBus, serviceBus, _clientFactories, _loadBalancerStrategyFactories,
            _sslContext, _sslParameters, _isSSLEnabled, _clientServicesConfig);
    SimpleLoadBalancer balancer = new SimpleLoadBalancer(state, _lbTimeout, _lbTimeoutUnit);

    TogglingLoadBalancer togLB = _factory.createBalancer(balancer, state, clusterToggle, serviceToggle, uriToggle);
    togLB.start(new Callback<None>() {

      @Override
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    TogglingPublisher<ServiceProperties> serviceToggle = _factory.createServiceToggle(zkServiceRegistry,
                                                                             fsServiceStore,
                                                                             serviceBus);
    TogglingPublisher<UriProperties> uriToggle = _factory.createUriToggle(zkUriRegistry, fsUriStore, uriBus);

    SimpleLoadBalancerState state = new SimpleLoadBalancerState(
            executorService, uriBus, clusterBus, serviceBus, _clientFactories, _loadBalancerStrategyFactories,
            _sslContext, _sslParameters, _isSSLEnabled, _clientServicesConfig);
    SimpleLoadBalancer balancer = new SimpleLoadBalancer(state, _lbTimeout, _lbTimeoutUnit);

    TogglingLoadBalancer togLB = _factory.createBalancer(balancer, state, clusterToggle, serviceToggle, uriToggle);
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        new HashMap<String, TransportClientFactory>();

    clientFactories.put("http", new HttpClientFactory());

    // create the state
    SimpleLoadBalancerState state =
        new SimpleLoadBalancerState(executorService,
                                    uriBus,
                                    clusterBus,
                                    serviceBus,
                                    clientFactories,
                                    loadBalancerStrategyFactories,
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    _loadBalancerStrategyFactories =
        new HashMap<String, LoadBalancerStrategyFactory<? extends LoadBalancerStrategy>>();
    _clientFactories = new HashMap<String, TransportClientFactory>();
    _state =
        new SimpleLoadBalancerState(_executorService,
                                    _uriRegistry,
                                    _clusterRegistry,
                                    _serviceRegistry,
                                    _clientFactories,
                                    _loadBalancerStrategyFactories);
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        new HashMap<String, TransportClientFactory>();

    clientFactories.put("http", new HttpClientFactory());

    // create the state
    SimpleLoadBalancerState state =
        new SimpleLoadBalancerState(executor,
                                    uriBus,
                                    clusterBus,
                                    serviceBus,
                                    clientFactories,
                                    loadBalancerStrategyFactories,
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    SynchronousExecutorService executorService = new SynchronousExecutorService();
    MockStore<ServiceProperties> serviceRegistry = new MockStore<ServiceProperties>();
    MockStore<ClusterProperties> clusterRegistry = new MockStore<ClusterProperties>();
    MockStore<UriProperties> uriRegistry = new MockStore<UriProperties>();

    SimpleLoadBalancerState state =
        new SimpleLoadBalancerState(executorService,
                                    uriRegistry,
                                    clusterRegistry,
                                    serviceRegistry,
                                    clientFactories,
                                    loadBalancerStrategyFactories);

    state.listenToService("greetings", new LoadBalancerState.NullStateListenerCallback());
    state.listenToService("groups", new LoadBalancerState.NullStateListenerCallback());
    state.listenToCluster("testcluster", new LoadBalancerState.NullStateListenerCallback());
    state.listenToCluster("badcluster", new LoadBalancerState.NullStateListenerCallback());
    List<String> schemes = new ArrayList<String>();
    schemes.add("http");
    Map<String, Object> metadataProperties = new HashMap<String, Object>();
    metadataProperties.put(RestConstants.RESTLI_PROTOCOL_VERSION_PROPERTY,
                           AllProtocolVersions.BASELINE_PROTOCOL_VERSION.toString());
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                                                           List<String> prioritizedSchemes)
  {
    List<SchemeStrategyPair> orderedStrategies = new ArrayList<SchemeStrategyPair>(prioritizedSchemes.size());
    for (String scheme : prioritizedSchemes)
    {
      LoadBalancerStrategy strategy = getStrategy(serviceName, scheme);
      if (strategy != null)
      {
        orderedStrategies.add(new SchemeStrategyPair(
                                scheme,
                                getStrategy(serviceName, scheme))
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                                                            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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