Examples with SimpleLoadBalancer com.linkedin.d2.balancer.simple.SimpleLoadBalancer used on opensource projects

Example 6 with SimpleLoadBalancer

use of com.linkedin.d2.balancer.simple.SimpleLoadBalancer in project rest.li by linkedin.

the class SimpleLoadBalancerTest method testLoadBalancerSmoke.

@Test(groups = { "small", "back-end" })
public void testLoadBalancerSmoke() throws URISyntaxException, ServiceUnavailableException, InterruptedException, ExecutionException {
    for (int tryAgain = 0; tryAgain < 1000; ++tryAgain) {
        Map<String, LoadBalancerStrategyFactory<? extends LoadBalancerStrategy>> loadBalancerStrategyFactories = new HashMap<String, LoadBalancerStrategyFactory<? extends LoadBalancerStrategy>>();
        Map<String, TransportClientFactory> clientFactories = new HashMap<String, TransportClientFactory>();
        List<String> prioritizedSchemes = new ArrayList<String>();
        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();
        // new
        clientFactories.put("http", new DoNothingClientFactory());
        // 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", Arrays.asList("degrader"), 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!");
    }
}

Example 7 with SimpleLoadBalancer

use of com.linkedin.d2.balancer.simple.SimpleLoadBalancer in project rest.li by linkedin.

the class SimpleLoadBalancerTest method testGetAllPartitionMultipleHostsOrdering.

/**
   * This tests the getPartitionInfo() when keys are null (actually a test for KeyMapper.getAllPartitionMultipleHosts()).
   */
@Test
public void testGetAllPartitionMultipleHostsOrdering() throws Exception {
    String serviceName = "articles";
    String clusterName = "cluster";
    String path = "path";
    String strategyName = "degrader";
    //setup partition
    Map<URI, Map<Integer, PartitionData>> partitionDescriptions = new HashMap<URI, Map<Integer, PartitionData>>();
    final URI server1 = new URI("http://foo1.com");
    Map<Integer, PartitionData> server1Data = new HashMap<Integer, PartitionData>();
    server1Data.put(1, new PartitionData(1.0));
    server1Data.put(2, new PartitionData(1.0));
    server1Data.put(3, new PartitionData(1.0));
    partitionDescriptions.put(server1, server1Data);
    final URI server2 = new URI("http://foo2.com");
    Map<Integer, PartitionData> server2Data = new HashMap<Integer, PartitionData>();
    server2Data.put(1, new PartitionData(1.0));
    server2Data.put(2, new PartitionData(1.0));
    //server2Data.put(3, new PartitionData(1.0));
    partitionDescriptions.put(server2, server2Data);
    final URI server3 = new URI("http://foo3.com");
    Map<Integer, PartitionData> server3Data = new HashMap<Integer, PartitionData>();
    server3Data.put(1, new PartitionData(1.0));
    server3Data.put(2, new PartitionData(1.0));
    //server3Data.put(3, new PartitionData(1.0));
    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();
    URI serviceURI = new URI("d2://" + serviceName);
    SimpleLoadBalancer balancer = new SimpleLoadBalancer(new PartitionedLoadBalancerTestState(clusterName, serviceName, path, strategyName, partitionDescriptions, orderedStrategies, accessor));
    HostToKeyMapper<URI> result = balancer.getPartitionInformation(serviceURI, null, 3, 123);
    Assert.assertEquals(result.getPartitionInfoMap().size(), 4);
    Assert.assertEquals(4, result.getPartitionCount());
    // partition 0 should be empty
    Assert.assertTrue(result.getPartitionInfoMap().get(0).getHosts().isEmpty());
    // partition 1 should have server1, server2 and server3.
    List<URI> ordering1 = result.getPartitionInfoMap().get(1).getHosts();
    List<URI> allServers = new ArrayList<>();
    allServers.add(server1);
    allServers.add(server2);
    allServers.add(server3);
    Assert.assertTrue(ordering1.size() == 3);
    Assert.assertTrue(ordering1.containsAll(allServers));
    // partition 2 should be the same as partition 1
    List<URI> ordering2 = result.getPartitionInfoMap().get(2).getHosts();
    Assert.assertEquals(ordering1, ordering2);
    // partition 3 should only contain server1
    List<URI> ordering3 = result.getPartitionInfoMap().get(3).getHosts();
    Assert.assertEquals(ordering3.get(0), server1);
    // partition 0 and partition 3 should not have enough hosts: lacking 3 and 2 respectively.
    Assert.assertTrue(result.getPartitionsWithoutEnoughHosts().containsKey(3));
    Assert.assertTrue(result.getPartitionsWithoutEnoughHosts().containsKey(0));
    Assert.assertEquals((int) result.getPartitionsWithoutEnoughHosts().get(3), 2);
    Assert.assertEquals((int) result.getPartitionsWithoutEnoughHosts().get(0), 3);
}

Example 8 with SimpleLoadBalancer

use of com.linkedin.d2.balancer.simple.SimpleLoadBalancer in project rest.li by linkedin.

the class SimpleLoadBalancerTest method testLoadBalancerDropRate.

/**
   * This test simulates dropping requests by playing with OverrideDropRate in config
   *
   */
@Test(groups = { "small", "back-end" })
public void testLoadBalancerDropRate() throws ServiceUnavailableException, ExecutionException, InterruptedException {
    final int RETRY = 10;
    for (int tryAgain = 0; tryAgain < RETRY; ++tryAgain) {
        Map<String, LoadBalancerStrategyFactory<? extends LoadBalancerStrategy>> loadBalancerStrategyFactories = new HashMap<String, LoadBalancerStrategyFactory<? extends LoadBalancerStrategy>>();
        Map<String, TransportClientFactory> clientFactories = new HashMap<String, TransportClientFactory>();
        List<String> prioritizedSchemes = new ArrayList<String>();
        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();
        // new
        clientFactories.put("http", new DoNothingClientFactory());
        // 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", Arrays.asList("degrader"), 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);
        Random random = new Random();
        for (int i = 0; i < 100; ++i) {
            try {
                RewriteClient client = (RewriteClient) loadBalancer.getClient(new URIRequest("d2://foo/52"), new RequestContext());
                TrackerClient tClient = (TrackerClient) client.getWrappedClient();
                DegraderImpl degrader = (DegraderImpl) tClient.getDegrader(DefaultPartitionAccessor.DEFAULT_PARTITION_ID);
                DegraderImpl.Config cfg = new DegraderImpl.Config(degrader.getConfig());
                // Change DropRate to 0.0 at the rate of 1/3
                cfg.setOverrideDropRate((random.nextInt(2) == 0) ? 1.0 : 0.0);
                degrader.setConfig(cfg);
                assertTrue(expectedUris.contains(client.getUri()));
                assertEquals(client.getUri().getScheme(), "http");
            } catch (ServiceUnavailableException e) {
                assertTrue(e.toString().contains("in a bad state (high latency/high error)"));
            }
        }
        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!");
    }
}

Example 9 with SimpleLoadBalancer

use of com.linkedin.d2.balancer.simple.SimpleLoadBalancer in project rest.li by linkedin.

the class ConsistentHashKeyMapperTest method getConsistentHashKeyMapper.

private ConsistentHashKeyMapper getConsistentHashKeyMapper(RingFactory<URI> ringFactory) throws URISyntaxException {
    String serviceName = "articles";
    String clusterName = "cluster";
    String path = "path";
    String strategyName = "degrader";
    //setup partition
    Map<URI, Map<Integer, PartitionData>> partitionDescriptions = new HashMap<URI, Map<Integer, PartitionData>>();
    final URI foo1 = new URI("http://foo1.com");
    Map<Integer, PartitionData> foo1Data = new HashMap<Integer, PartitionData>();
    foo1Data.put(0, new PartitionData(1.0));
    partitionDescriptions.put(foo1, foo1Data);
    final URI foo2 = new URI("http://foo2.com");
    Map<Integer, PartitionData> foo2Data = new HashMap<Integer, PartitionData>();
    foo2Data.put(3, new PartitionData(1.0));
    foo2Data.put(4, new PartitionData(1.0));
    partitionDescriptions.put(foo2, foo2Data);
    final URI foo3 = new URI("http://foo3.com");
    Map<Integer, PartitionData> foo3Data = new HashMap<Integer, PartitionData>();
    foo3Data.put(0, new PartitionData(1.0));
    partitionDescriptions.put(foo3, foo3Data);
    final URI foo4 = new URI("http://foo4.com");
    Map<Integer, PartitionData> foo4Data = new HashMap<Integer, PartitionData>();
    foo4Data.put(1, new PartitionData(1.0));
    partitionDescriptions.put(foo4, foo4Data);
    final URI foo5 = new URI("http://foo5.com");
    Map<Integer, PartitionData> foo5Data = new HashMap<Integer, PartitionData>();
    foo5Data.put(1, new PartitionData(1.0));
    partitionDescriptions.put(foo5, foo5Data);
    final URI foo6 = new URI("http://foo6.com");
    Map<Integer, PartitionData> foo6Data = new HashMap<Integer, PartitionData>();
    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, ringFactory);
    orderedStrategies.add(new LoadBalancerState.SchemeStrategyPair("http", strategy));
    //setup the partition accessor which is used to get partitionId -> keys
    PartitionAccessor accessor = new TestPartitionAccessor();
    URI serviceURI = new URI("d2://" + serviceName);
    SimpleLoadBalancer balancer = new SimpleLoadBalancer(new PartitionedLoadBalancerTestState(clusterName, serviceName, path, strategyName, partitionDescriptions, orderedStrategies, accessor));
    ConsistentHashKeyMapper mapper = new ConsistentHashKeyMapper(balancer, balancer);
    return mapper;
}

Example 10 with SimpleLoadBalancer

use of com.linkedin.d2.balancer.simple.SimpleLoadBalancer in project rest.li by linkedin.

the class ConsistentHashKeyMapperTest method testMapKeysConcurrency.

@SuppressWarnings("rawtypes")
@Test
public void testMapKeysConcurrency() throws Exception {
    String serviceName = "articles";
    String clusterName = "cluster";
    String path = "path";
    String strategyName = "degrader";
    int numPartitions = 500;
    // setup partition
    Map<URI, Map<Integer, PartitionData>> partitionDescriptions = new HashMap<URI, Map<Integer, PartitionData>>();
    final URI foo1 = new URI("http://foo1.com");
    Map<Integer, PartitionData> foo1Data = new HashMap<Integer, PartitionData>();
    for (int i = 0; i < numPartitions; i++) {
        foo1Data.put(i, new PartitionData(1.0));
    }
    partitionDescriptions.put(foo1, foo1Data);
    DegraderLoadBalancerStrategyV3 strategy = new DegraderLoadBalancerStrategyV3(new DegraderLoadBalancerStrategyConfig(5000), serviceName, null);
    List<LoadBalancerState.SchemeStrategyPair> orderedStrategies = new ArrayList<LoadBalancerState.SchemeStrategyPair>();
    orderedStrategies.add(new LoadBalancerState.SchemeStrategyPair("http", strategy));
    PartitionAccessor accessor = new TestDeadlockPartitionAccessor(numPartitions);
    SimpleLoadBalancer balancer = new SimpleLoadBalancer(new PartitionedLoadBalancerTestState(clusterName, serviceName, path, strategyName, partitionDescriptions, orderedStrategies, accessor));
    ConsistentHashKeyMapper mapper = new ConsistentHashKeyMapper(balancer, balancer);
    CountDownLatch latch = new CountDownLatch(numPartitions);
    List<Runnable> runnables = createRunnables(numPartitions, mapper, serviceName, latch);
    final ExecutorService executor = Executors.newFixedThreadPool(numPartitions);
    List<Future> futures = new ArrayList<Future>();
    for (int i = 0; i < numPartitions; i++) {
        futures.add(executor.submit(runnables.get(i)));
    }
    for (Future future : futures) {
        future.get(30, TimeUnit.SECONDS);
    }
}