Examples with ExecutionContext com.netflix.loadbalancer.reactive.ExecutionContext used on opensource projects

Example 1 with ExecutionContext

use of com.netflix.loadbalancer.reactive.ExecutionContext in project ribbon by Netflix.

the class LoadBalancingHttpClient method submit.

/**
     * Subject an operation to run in the load balancer
     * 
     * @param request
     * @param errorHandler
     * @param requestConfig
     * @param rxClientConfig
     * @return
     */
private Observable<HttpClientResponse<O>> submit(final Server server, final HttpClientRequest<I> request, final RetryHandler errorHandler, final IClientConfig requestConfig, final ClientConfig rxClientConfig) {
    RetryHandler retryHandler = errorHandler;
    if (retryHandler == null) {
        retryHandler = getRequestRetryHandler(request, requestConfig);
    }
    final IClientConfig config = requestConfig == null ? DefaultClientConfigImpl.getEmptyConfig() : requestConfig;
    final ExecutionContext<HttpClientRequest<I>> context = new ExecutionContext<HttpClientRequest<I>>(request, config, this.getClientConfig(), retryHandler);
    Observable<HttpClientResponse<O>> result = submitToServerInURI(request, config, rxClientConfig, retryHandler, context);
    if (result == null) {
        LoadBalancerCommand<HttpClientResponse<O>> command;
        if (retryHandler != defaultRetryHandler) {
            // need to create new builder instead of the default one
            command = LoadBalancerCommand.<HttpClientResponse<O>>builder().withExecutionContext(context).withLoadBalancerContext(lbContext).withListeners(listeners).withClientConfig(this.getClientConfig()).withRetryHandler(retryHandler).withServer(server).build();
        } else {
            command = defaultCommandBuilder;
        }
        result = command.submit(requestToOperation(request, getRxClientConfig(config, rxClientConfig)));
    }
    return result;
}

Example 2 with ExecutionContext

use of com.netflix.loadbalancer.reactive.ExecutionContext in project ribbon by Netflix.

the class ListenerTest method testAbortedExecution.

@Test
public void testAbortedExecution() {
    IClientConfig config = DefaultClientConfigImpl.getClientConfigWithDefaultValues().withProperty(CommonClientConfigKey.ConnectTimeout, "100").withProperty(CommonClientConfigKey.MaxAutoRetries, 1).withProperty(CommonClientConfigKey.MaxAutoRetriesNextServer, 1);
    HttpClientRequest<ByteBuf> request = HttpClientRequest.createGet("/testAsync/person");
    Server badServer = new Server("localhost:12345");
    Server badServer2 = new Server("localhost:34567");
    List<Server> servers = Lists.newArrayList(badServer, badServer2);
    BaseLoadBalancer lb = LoadBalancerBuilder.<Server>newBuilder().withRule(new AvailabilityFilteringRule()).withPing(new DummyPing()).buildFixedServerListLoadBalancer(servers);
    IClientConfig overrideConfig = DefaultClientConfigImpl.getEmptyConfig();
    TestExecutionListener listener = new TestExecutionListener(request, overrideConfig) {

        @Override
        public void onExecutionStart(ExecutionContext context) {
            throw new AbortExecutionException("exit now");
        }
    };
    List<ExecutionListener<HttpClientRequest<ByteBuf>, HttpClientResponse<ByteBuf>>> listeners = Lists.<ExecutionListener<HttpClientRequest<ByteBuf>, HttpClientResponse<ByteBuf>>>newArrayList(listener);
    LoadBalancingHttpClient<ByteBuf, ByteBuf> client = RibbonTransport.newHttpClient(lb, config, new NettyHttpLoadBalancerErrorHandler(config), listeners);
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicReference<Throwable> ref = new AtomicReference<Throwable>();
    client.submit(request, null, overrideConfig).subscribe(new Action1<HttpClientResponse<ByteBuf>>() {

        @Override
        public void call(HttpClientResponse<ByteBuf> byteBufHttpClientResponse) {
        }
    }, new Action1<Throwable>() {

        @Override
        public void call(Throwable throwable) {
            ref.set(throwable);
            latch.countDown();
        }
    });
    try {
        latch.await(500, TimeUnit.MILLISECONDS);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    assertTrue(ref.get() instanceof AbortExecutionException);
}

Example 3 with ExecutionContext

use of com.netflix.loadbalancer.reactive.ExecutionContext in project java-chassis by ServiceComb.

the class LoadbalanceHandler method sendWithRetry.

private void sendWithRetry(Invocation invocation, AsyncResponse asyncResp, final LoadBalancer choosenLB) throws Exception {
    long time = System.currentTimeMillis();
    // retry in loadbalance, 2.0 feature
    final int currentHandler = invocation.getHandlerIndex();
    final SyncResponseExecutor orginExecutor;
    final Executor newExecutor;
    if (invocation.getResponseExecutor() instanceof SyncResponseExecutor) {
        orginExecutor = (SyncResponseExecutor) invocation.getResponseExecutor();
        newExecutor = new Executor() {

            @Override
            public void execute(Runnable command) {
                // retry的场景，对于同步调用， 需要在网络线程中进行。同步调用的主线程已经被挂起，无法再主线程中进行重试。
                command.run();
            }
        };
        invocation.setResponseExecutor(newExecutor);
    } else {
        orginExecutor = null;
        newExecutor = null;
    }
    ExecutionListener<Invocation, Response> listener = new ExecutionListener<Invocation, Response>() {

        @Override
        public void onExecutionStart(ExecutionContext<Invocation> context) throws AbortExecutionException {
        }

        @Override
        public void onStartWithServer(ExecutionContext<Invocation> context, ExecutionInfo info) throws AbortExecutionException {
        }

        @Override
        public void onExceptionWithServer(ExecutionContext<Invocation> context, Throwable exception, ExecutionInfo info) {
            LOGGER.error("onExceptionWithServer msg {}; server {}", exception.getMessage(), context.getRequest().getEndpoint());
        }

        @Override
        public void onExecutionSuccess(ExecutionContext<Invocation> context, Response response, ExecutionInfo info) {
            if (orginExecutor != null) {
                orginExecutor.execute(() -> {
                    asyncResp.complete(response);
                });
            } else {
                asyncResp.complete(response);
            }
        }

        @Override
        public void onExecutionFailed(ExecutionContext<Invocation> context, Throwable finalException, ExecutionInfo info) {
            if (orginExecutor != null) {
                orginExecutor.execute(() -> {
                    asyncResp.consumerFail(finalException);
                });
            } else {
                asyncResp.consumerFail(finalException);
            }
        }
    };
    List<ExecutionListener<Invocation, Response>> listeners = new ArrayList<>(0);
    listeners.add(listener);
    ExecutionContext<Invocation> context = new ExecutionContext<>(invocation, null, null, null);
    LoadBalancerCommand<Response> command = LoadBalancerCommand.<Response>builder().withLoadBalancer(choosenLB).withServerLocator(invocation).withRetryHandler(new DefaultLoadBalancerRetryHandler(Configuration.INSTANCE.getRetryOnSame(invocation.getMicroserviceName()), Configuration.INSTANCE.getRetryOnNext(invocation.getMicroserviceName()), true)).withListeners(listeners).withExecutionContext(context).build();
    Observable<Response> observable = command.submit(new ServerOperation<Response>() {

        public Observable<Response> call(Server s) {
            return Observable.create(f -> {
                try {
                    ((CseServer) s).setLastVisitTime(time);
                    choosenLB.getLoadBalancerStats().incrementNumRequests(s);
                    invocation.setHandlerIndex(currentHandler);
                    invocation.setEndpoint(((CseServer) s).getEndpoint());
                    invocation.next(resp -> {
                        if (resp.isFailed()) {
                            LOGGER.error("service call error, msg is {}, server is {} ", ((Throwable) resp.getResult()).getMessage(), s);
                            choosenLB.getLoadBalancerStats().incrementSuccessiveConnectionFailureCount(s);
                            f.onError(resp.getResult());
                        } else {
                            choosenLB.getLoadBalancerStats().incrementActiveRequestsCount(s);
                            choosenLB.getLoadBalancerStats().noteResponseTime(s, (System.currentTimeMillis() - time));
                            f.onNext(resp);
                            f.onCompleted();
                        }
                    });
                } catch (Exception e) {
                    LOGGER.error("execution error, msg is " + e.getMessage());
                    f.onError(e);
                }
            });
        }
    });
    observable.subscribe(response -> {
    }, error -> {
    }, () -> {
    });
}

Example 4 with ExecutionContext

use of com.netflix.loadbalancer.reactive.ExecutionContext in project ribbon by Netflix.

the class ListenerTest method testAbortedExecutionOnServer.

@Test
public void testAbortedExecutionOnServer() {
    IClientConfig config = DefaultClientConfigImpl.getClientConfigWithDefaultValues().withProperty(CommonClientConfigKey.ConnectTimeout, "100").withProperty(CommonClientConfigKey.MaxAutoRetries, 1).withProperty(CommonClientConfigKey.MaxAutoRetriesNextServer, 1);
    HttpClientRequest<ByteBuf> request = HttpClientRequest.createGet("/testAsync/person");
    Server badServer = new Server("localhost:12345");
    Server badServer2 = new Server("localhost:34567");
    List<Server> servers = Lists.newArrayList(badServer, badServer2);
    BaseLoadBalancer lb = LoadBalancerBuilder.<Server>newBuilder().withRule(new AvailabilityFilteringRule()).withPing(new DummyPing()).buildFixedServerListLoadBalancer(servers);
    IClientConfig overrideConfig = DefaultClientConfigImpl.getEmptyConfig();
    TestExecutionListener listener = new TestExecutionListener(request, overrideConfig) {

        @Override
        public void onStartWithServer(ExecutionContext context, ExecutionInfo info) {
            throw new AbortExecutionException("exit now");
        }
    };
    List<ExecutionListener<HttpClientRequest<ByteBuf>, HttpClientResponse<ByteBuf>>> listeners = Lists.<ExecutionListener<HttpClientRequest<ByteBuf>, HttpClientResponse<ByteBuf>>>newArrayList(listener);
    LoadBalancingHttpClient<ByteBuf, ByteBuf> client = RibbonTransport.newHttpClient(lb, config, new NettyHttpLoadBalancerErrorHandler(config), listeners);
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicReference<Throwable> ref = new AtomicReference<Throwable>();
    client.submit(request, null, overrideConfig).subscribe(new Action1<HttpClientResponse<ByteBuf>>() {

        @Override
        public void call(HttpClientResponse<ByteBuf> byteBufHttpClientResponse) {
        }
    }, new Action1<Throwable>() {

        @Override
        public void call(Throwable throwable) {
            ref.set(throwable);
            latch.countDown();
        }
    });
    try {
        latch.await(500, TimeUnit.MILLISECONDS);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    assertTrue(ref.get() instanceof AbortExecutionException);
}