Examples of com.linkedin.d2.discovery.stores.zk.ZKConnection

Package com.linkedin.d2.discovery.stores.zk

Examples of com.linkedin.d2.discovery.stores.zk.ZKConnection

com.linkedin.d2.balancer.strategies.LoadBalancerStrategy
Very very lightweight holder for a ZK connection which allows monitoring of the connection state. It uses the default watcher for connection state monitoring. Do NOT set a different default watcher on this connection. Use of the async methods that set a watch to be delivered to the default watcher is discouraged, as such watches will be ignored when triggered. @author Steven Ihde @version $Revision: $

        "/test", "random", null,
        Collections.<String, Object>emptyMap(),
        null, null, schemes, null));


    // first we announce uri with empty partition data map
    _uriRegistry.put("cluster-1", new UriProperties("cluster-1", uriData));


    TrackerClient client = _state.getClient("service-1", uri);


    assertNotNull(client);
    assertEquals(client.getUri(), uri);
    // tracker client should see empty partition data map
    assertTrue(client.getParttitionDataMap().isEmpty());


    // then we update this uri to have a non-empty partition data map
    partitionDataMap.put(DefaultPartitionAccessor.DEFAULT_PARTITION_ID, new PartitionData(1d));
    _uriRegistry.put("cluster-1", new UriProperties("cluster-1", uriData));


    TrackerClient updatedClient = _state.getClient("service-1", uri);


    assertNotNull(updatedClient);
    // should have got a different tracker client

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    ZooKeeperPermanentStore<ClusterProperties> zkClusterRegistry = createPermanentStore(
            zkConnection, ZKFSUtil.clusterPath(_baseZKPath), new ClusterPropertiesJsonSerializer());
    ZooKeeperPermanentStore<ServiceProperties> zkServiceRegistry = createPermanentStore(
            zkConnection, ZKFSUtil.servicePath(_baseZKPath, _d2ServicePath), new ServicePropertiesJsonSerializer());
    ZooKeeperEphemeralStore<UriProperties> zkUriRegistry =  createEphemeralStore(
            zkConnection, ZKFSUtil.uriPath(_baseZKPath), new UriPropertiesJsonSerializer(), new UriPropertiesMerger());


    FileStore<ClusterProperties> fsClusterStore = createFileStore("clusters", new ClusterPropertiesJsonSerializer());
    FileStore<ServiceProperties> fsServiceStore = createFileStore(_d2ServicePath, new ServicePropertiesJsonSerializer());
    FileStore<UriProperties> fsUriStore = createFileStore("uris", new UriPropertiesJsonSerializer());


    PropertyEventBus<ClusterProperties> clusterBus = new PropertyEventBusImpl<ClusterProperties>(executorService);
    PropertyEventBus<ServiceProperties> serviceBus = new PropertyEventBusImpl<ServiceProperties>(executorService);
    PropertyEventBus<UriProperties> uriBus = new PropertyEventBusImpl<UriProperties>(executorService);

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    ZooKeeperPermanentStore<ClusterProperties> zkClusterRegistry = createPermanentStore(
            zkConnection, ZKFSUtil.clusterPath(_baseZKPath), new ClusterPropertiesJsonSerializer());
    ZooKeeperPermanentStore<ServiceProperties> zkServiceRegistry = createPermanentStore(
            zkConnection, ZKFSUtil.servicePath(_baseZKPath, _d2ServicePath), new ServicePropertiesJsonSerializer());
    ZooKeeperEphemeralStore<UriProperties> zkUriRegistry =  createEphemeralStore(
            zkConnection, ZKFSUtil.uriPath(_baseZKPath), new UriPropertiesJsonSerializer(), new UriPropertiesMerger());


    FileStore<ClusterProperties> fsClusterStore = createFileStore("clusters", new ClusterPropertiesJsonSerializer());
    FileStore<ServiceProperties> fsServiceStore = createFileStore(_d2ServicePath, new ServicePropertiesJsonSerializer());
    FileStore<UriProperties> fsUriStore = createFileStore("uris", new UriPropertiesJsonSerializer());

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    _announcer.setWeight(1d);


    return new ZooKeeperConnectionManager(_zkHostname + ":" + _zkPort,
                                          _sessionTimeoutInMs,
                                          _basePath,
                                          new ZKUriStoreFactory(),
                                          _announcer);
  }

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  public ZooKeeperConnectionManager build()
  {
    _announcer.setWeight(1d);


    return new ZooKeeperConnectionManager(_zkHostname + ":" + _zkPort,
                                          _sessionTimeoutInMs,
                                          _basePath,
                                          new ZKUriStoreFactory(),
                                          _announcer);
  }

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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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                                                           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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