Examples of com.linkedin.d2.discovery.event.SynchronousExecutorService

com.linkedin.d2.discovery.stores.zk.ZKConnection
Dummy executor service whose purpose is to synchronously process a runnable in the current thread so this will make the test easy to manage @author Oby Sumampouw


      MockStore<ServiceProperties> serviceRegistry = new MockStore<ServiceProperties>();
      MockStore<ClusterProperties> clusterRegistry = new MockStore<ClusterProperties>();
      MockStore<UriProperties> uriRegistry = new MockStore<UriProperties>();


      ScheduledExecutorService executorService = new SynchronousExecutorService();


      //loadBalancerStrategyFactories.put("rr", new RandomLoadBalancerStrategyFactory());
      loadBalancerStrategyFactories.put("degrader", new DegraderLoadBalancerStrategyFactoryV3());
      // PrpcClientFactory();
      clientFactories.put("http", new DoNothingClientFactory()); // new
      // HttpClientFactory();


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


      SimpleLoadBalancer loadBalancer =
          new SimpleLoadBalancer(state, 5, TimeUnit.SECONDS);


      FutureCallback<None> balancerCallback = new FutureCallback<None>();
      loadBalancer.start(balancerCallback);
      balancerCallback.get();


      URI uri1 = URI.create("http://test.qa1.com:1234");
      URI uri2 = URI.create("http://test.qa2.com:2345");
      URI uri3 = URI.create("http://test.qa3.com:6789");


      Map<Integer, PartitionData> partitionData = new HashMap<Integer, PartitionData>(1);
      partitionData.put(DefaultPartitionAccessor.DEFAULT_PARTITION_ID, new PartitionData(1d));
      Map<URI, Map<Integer, PartitionData>> uriData = new HashMap<URI, Map<Integer, PartitionData>>(3);
      uriData.put(uri1, partitionData);
      uriData.put(uri2, partitionData);
      uriData.put(uri3, partitionData);


      prioritizedSchemes.add("http");


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


      serviceRegistry.put("foo", new ServiceProperties("foo",
                                                        "cluster-1",
                                                        "/foo",
                                                        "degrader",
                                                        Collections.<String>emptyList(),
                                                        Collections.<String,Object>emptyMap(),
                                                        null,
                                                        null,
                                                        prioritizedSchemes,
                                                        null));
      uriRegistry.put("cluster-1", new UriProperties("cluster-1", uriData));


      URI expectedUri1 = URI.create("http://test.qa1.com:1234/foo");
      URI expectedUri2 = URI.create("http://test.qa2.com:2345/foo");
      URI expectedUri3 = URI.create("http://test.qa3.com:6789/foo");


      Set<URI> expectedUris = new HashSet<URI>();


      expectedUris.add(expectedUri1);
      expectedUris.add(expectedUri2);
      expectedUris.add(expectedUri3);


      for (int i = 0; i < 100; ++i)
      {
        RewriteClient client =
            (RewriteClient) loadBalancer.getClient(new URIRequest("d2://foo/52"),
                                                   new RequestContext());


        assertTrue(expectedUris.contains(client.getUri()));
        assertEquals(client.getUri().getScheme(), "http");
      }


      final CountDownLatch latch = new CountDownLatch(1);
      PropertyEventShutdownCallback callback = new PropertyEventShutdownCallback()
      {
        @Override
        public void done()
        {
          latch.countDown();
        }
      };


      state.shutdown(callback);


      if (!latch.await(60, TimeUnit.SECONDS))
      {
        fail("unable to shutdown state");
      }


      executorService.shutdownNow();


      assertTrue(executorService.isShutdown(), "ExecutorService should have shut down!");
    }
  }

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    Map<String, TransportClientFactory> clientFactories =
        new HashMap<String, TransportClientFactory>();


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


    SynchronousExecutorService executorService = new SynchronousExecutorService();
    MockStore<ServiceProperties> serviceRegistry = new MockStore<ServiceProperties>();
    MockStore<ClusterProperties> clusterRegistry = new MockStore<ClusterProperties>();
    MockStore<UriProperties> uriRegistry = new MockStore<UriProperties>();


    SimpleLoadBalancerState state =

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      _store.put(listenTo, _store.getSerializer()
                                 .fromBytes(discoveryProperties.getBytes("UTF-8")));
    }
    catch (PropertySerializationException e)
    {
      throw new PropertyStoreException(e);
    }
    catch (UnsupportedEncodingException e)
    {
      throw new RuntimeException("UTF-8 should never fail", e);
    }

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      {
        interrupted = true;
      }
      catch (ExecutionException e)
      {
        throw new PropertyStoreException(e);
      }
    }
  }

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    {
      callback.get(10, TimeUnit.SECONDS);
    }
    catch (Exception e)
    {
      throw new PropertyStoreException(e);
    }
  }

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    {
      callback.get(10, TimeUnit.SECONDS);
    }
    catch (Exception e)
    {
      throw new PropertyStoreException(e);
    }
  }

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    {
      callback.get(10, TimeUnit.SECONDS);
    }
    catch (Exception e)
    {
      throw new PropertyStoreException(e);
    }
  }

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    {
      callback.get(10, TimeUnit.SECONDS);
    }
    catch (Exception e)
    {
      throw new PropertyStoreException(e);
    }
  }

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    {
      callback.get(10, TimeUnit.SECONDS);
    }
    catch (Exception e)
    {
      throw new PropertyStoreException(e);
    }
  }

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                   boolean useDeltaWrite,
                   int maxOutstandingWrites)
  {
    _retryLimit = retryLimit;
    // use retry zkConnection
    _zkConnection = new ZKConnection(zkHosts, sessionTimeout, _retryLimit, false, null, 0);
    _basePath = basePath;
    _timeout = timeout;
    _clusterServiceConfigurations = Arrays.asList(clusterServiceConfigurations, extraClusterServiceConfigurations);
    _clusterDefaults = clusterDefaults;
    _serviceDefaults = serviceDefaults;

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