Examples with BaseLoadBalancer com.netflix.loadbalancer.BaseLoadBalancer used on opensource projects

Example 16 with BaseLoadBalancer

use of com.netflix.loadbalancer.BaseLoadBalancer in project ribbon by Netflix.

the class LoadBalancingExample method main.

public static void main(String[] args) throws Exception {
    List<Server> servers = Lists.newArrayList(new Server("www.google.com:80"), new Server("www.examples.com:80"), new Server("www.wikipedia.org:80"));
    BaseLoadBalancer lb = LoadBalancerBuilder.newBuilder().buildFixedServerListLoadBalancer(servers);
    LoadBalancingHttpClient<ByteBuf, ByteBuf> client = RibbonTransport.newHttpClient(lb);
    final CountDownLatch latch = new CountDownLatch(servers.size());
    Observer<HttpClientResponse<ByteBuf>> observer = new Observer<HttpClientResponse<ByteBuf>>() {

        @Override
        public void onCompleted() {
        }

        @Override
        public void onError(Throwable e) {
            e.printStackTrace();
        }

        @Override
        public void onNext(HttpClientResponse<ByteBuf> args) {
            latch.countDown();
            System.out.println("Got response: " + args.getStatus());
        }
    };
    for (int i = 0; i < servers.size(); i++) {
        HttpClientRequest<ByteBuf> request = HttpClientRequest.createGet("/");
        client.submit(request).subscribe(observer);
    }
    latch.await();
    System.out.println(lb.getLoadBalancerStats());
}

Example 17 with BaseLoadBalancer

use of com.netflix.loadbalancer.BaseLoadBalancer in project ribbon by Netflix.

the class NettyClientTest method testStreamWithLoadBalancer.

@Test
public void testStreamWithLoadBalancer() throws Exception {
    // NettyHttpLoadBalancerErrorHandler errorHandler = new NettyHttpLoadBalancerErrorHandler(1, 3, true);
    // IClientConfig config = DefaultClientConfigImpl.getClientConfigWithDefaultValues().withProperty(CommonClientConfigKey.ConnectTimeout, "1000");
    IClientConfig config = IClientConfig.Builder.newBuilder().withRetryOnAllOperations(true).withMaxAutoRetries(1).withMaxAutoRetriesNextServer(3).build();
    BaseLoadBalancer lb = new BaseLoadBalancer(new DummyPing(), new AvailabilityFilteringRule());
    LoadBalancingHttpClient<ByteBuf, ServerSentEvent> lbObservables = (LoadBalancingHttpClient<ByteBuf, ServerSentEvent>) RibbonTransport.newSSEClient(lb, config);
    HttpClientRequest<ByteBuf> request = HttpClientRequest.createGet("/testAsync/personStream");
    List<Person> result = Lists.newArrayList();
    Server goodServer = new Server("localhost:" + port);
    Server badServer = new Server("localhost:12245");
    List<Server> servers = Lists.newArrayList(badServer, badServer, badServer, goodServer);
    lb.setServersList(servers);
    result = getPersonListFromResponse(lbObservables.submit(request, null, null));
    assertEquals(EmbeddedResources.entityStream, result);
}

Example 18 with BaseLoadBalancer

use of com.netflix.loadbalancer.BaseLoadBalancer in project ribbon by Netflix.

the class NettyClientTest method testLoadBalancerThrottle.

@Test
public void testLoadBalancerThrottle() throws Exception {
    HttpClientRequest<ByteBuf> request = HttpClientRequest.createGet("/testAsync/throttle");
    IClientConfig config = DefaultClientConfigImpl.getClientConfigWithDefaultValues().set(IClientConfigKey.Keys.MaxAutoRetriesNextServer, 1).set(IClientConfigKey.Keys.OkToRetryOnAllOperations, true);
    BaseLoadBalancer lb = new BaseLoadBalancer(new DummyPing(), new AvailabilityFilteringRule());
    LoadBalancingHttpClient<ByteBuf, ByteBuf> lbObservables = RibbonTransport.newHttpClient(lb, config);
    Server server = new Server(host, port);
    lb.setServersList(Lists.newArrayList(server, server, server));
    Observable<HttpClientResponse<ByteBuf>> response = lbObservables.submit(request);
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
    response.subscribe(new Action1<HttpClientResponse<ByteBuf>>() {

        @Override
        public void call(HttpClientResponse<ByteBuf> t1) {
            System.err.println("Get response: " + t1.getStatus().code());
            latch.countDown();
        }
    }, new Action1<Throwable>() {

        @Override
        public void call(Throwable t1) {
            error.set(t1);
            latch.countDown();
        }
    }, new Action0() {

        @Override
        public void call() {
            Thread.dumpStack();
            latch.countDown();
        }
    });
    latch.await();
    assertTrue(error.get() instanceof ClientException);
    ClientException ce = (ClientException) error.get();
    assertTrue(ce.toString(), ce.getErrorType() == ClientException.ErrorType.NUMBEROF_RETRIES_NEXTSERVER_EXCEEDED);
    assertEquals(2, lbObservables.getServerStats(server).getSuccessiveConnectionFailureCount());
}

Example 19 with BaseLoadBalancer

use of com.netflix.loadbalancer.BaseLoadBalancer in project ribbon by Netflix.

the class NettyClientTest method testLoadBalancingObservablesWithReadTimeout.

@Test
public void testLoadBalancingObservablesWithReadTimeout() throws Exception {
    NettyHttpLoadBalancerErrorHandler errorHandler = new NettyHttpLoadBalancerErrorHandler(1, 3, true);
    MockWebServer server = new MockWebServer();
    String content = "{\"name\": \"ribbon\", \"age\": 2}";
    server.enqueue(new MockResponse().setResponseCode(200).setHeader("Content-type", "application/json").setBody(content));
    server.play();
    IClientConfig config = DefaultClientConfigImpl.getClientConfigWithDefaultValues().set(CommonClientConfigKey.ReadTimeout, 100);
    HttpClientRequest<ByteBuf> request = HttpClientRequest.createGet("/testAsync/readTimeout");
    BaseLoadBalancer lb = new BaseLoadBalancer(new DummyPing(), new AvailabilityFilteringRule());
    LoadBalancingHttpClient<ByteBuf, ByteBuf> lbObservables = RibbonTransport.newHttpClient(lb, config, errorHandler);
    Server goodServer = new Server("localhost:" + server.getPort());
    Server badServer = new Server("localhost:" + port);
    lb.setServersList(Lists.newArrayList(goodServer, badServer, badServer, goodServer));
    Observable<Person> observableWithRetries = getPersonObservable(lbObservables.submit(request));
    ObserverWithLatch<Person> observer = new ObserverWithLatch<Person>();
    observableWithRetries.subscribe(observer);
    observer.await();
    if (observer.error != null) {
        observer.error.printStackTrace();
    }
    assertEquals("ribbon", observer.obj.name);
    assertEquals(2, observer.obj.age);
    ServerStats stats = lbObservables.getServerStats(badServer);
    server.shutdown();
    final HttpClientListener listener = lbObservables.getListener();
    waitUntilTrueOrTimeout(1000, new Func0<Boolean>() {

        @Override
        public Boolean call() {
            return listener.getPoolReleases() == 5;
        }
    });
    assertEquals(0, listener.getPoolReuse());
    // two requests to bad server because retry same server is set to 1
    assertEquals(4, stats.getTotalRequestsCount());
    assertEquals(0, stats.getActiveRequestsCount());
    assertEquals(4, stats.getSuccessiveConnectionFailureCount());
    stats = lbObservables.getServerStats(goodServer);
    assertEquals(1, stats.getTotalRequestsCount());
    assertEquals(0, stats.getActiveRequestsCount());
    assertEquals(0, stats.getSuccessiveConnectionFailureCount());
}

Example 20 with BaseLoadBalancer

use of com.netflix.loadbalancer.BaseLoadBalancer in project ribbon by Netflix.

the class NettyClientTest method testLoadBalancingPostWithReadTimeout.

@Test
public void testLoadBalancingPostWithReadTimeout() throws Exception {
    MockWebServer server = new MockWebServer();
    String content = "{\"name\": \"ribbon\", \"age\": 2}";
    server.enqueue(new MockResponse().setResponseCode(200).setHeader("Content-type", "application/json").setBody(content));
    server.play();
    IClientConfig config = DefaultClientConfigImpl.getClientConfigWithDefaultValues().set(CommonClientConfigKey.ReadTimeout, 100);
    HttpClientRequest<ByteBuf> request = HttpClientRequest.createPost("/testAsync/postTimeout").withContent(SerializationUtils.serializeToBytes(JacksonCodec.getInstance(), EmbeddedResources.defaultPerson, null)).withHeader("Content-type", "application/json");
    NettyHttpLoadBalancerErrorHandler errorHandler = new NettyHttpLoadBalancerErrorHandler(1, 3, true);
    BaseLoadBalancer lb = new BaseLoadBalancer(new DummyPing(), new AvailabilityFilteringRule());
    LoadBalancingHttpClient<ByteBuf, ByteBuf> lbObservables = RibbonTransport.newHttpClient(lb, config, errorHandler);
    Server goodServer = new Server("localhost:" + server.getPort());
    Server badServer = new Server("localhost:" + port);
    List<Server> servers = Lists.newArrayList(badServer, badServer, badServer, goodServer);
    lb.setServersList(servers);
    RetryHandler handler = new RequestSpecificRetryHandler(true, true, errorHandler, null) {

        @Override
        public boolean isRetriableException(Throwable e, boolean sameServer) {
            return true;
        }
    };
    Observable<Person> observableWithRetries = getPersonObservable(lbObservables.submit(request, handler, null));
    ObserverWithLatch<Person> observer = new ObserverWithLatch<Person>();
    observableWithRetries.subscribe(observer);
    observer.await();
    if (observer.error != null) {
        observer.error.printStackTrace();
    }
    assertEquals("ribbon", observer.obj.name);
    assertEquals(2, observer.obj.age);
    ServerStats stats = lbObservables.getServerStats(badServer);
    server.shutdown();
    assertEquals(4, stats.getTotalRequestsCount());
    assertEquals(0, stats.getActiveRequestsCount());
    assertEquals(4, stats.getSuccessiveConnectionFailureCount());
    stats = lbObservables.getServerStats(goodServer);
    // two requests to bad server because retry same server is set to 1
    assertEquals(1, stats.getTotalRequestsCount());
    assertEquals(0, stats.getActiveRequestsCount());
    assertEquals(0, stats.getSuccessiveConnectionFailureCount());
}