Examples with AsyncResponseTransformer software.amazon.awssdk.core.async.AsyncResponseTransformer used on opensource projects

Example 1 with AsyncResponseTransformer

use of software.amazon.awssdk.core.async.AsyncResponseTransformer in project aws-sdk-java-v2 by aws.

the class EventStreamAsyncResponseTransformerTest method multipleEventsInChunk_OnlyDeliversOneEvent.

@Test
public void multipleEventsInChunk_OnlyDeliversOneEvent() throws InterruptedException {
    Message eventMessage = new Message(ImmutableMap.of(":message-type", HeaderValue.fromString("event"), ":event-type", HeaderValue.fromString("foo")), new byte[0]);
    CountDownLatch latch = new CountDownLatch(1);
    Flowable<ByteBuffer> bytePublisher = Flowable.just(eventMessage.toByteBuffer(), eventMessage.toByteBuffer()).doOnCancel(latch::countDown);
    AtomicInteger numEvents = new AtomicInteger(0);
    // Request one event then cancel
    Subscriber<Object> requestOneSubscriber = new Subscriber<Object>() {

        private Subscription subscription;

        @Override
        public void onSubscribe(Subscription subscription) {
            this.subscription = subscription;
            subscription.request(1);
        }

        @Override
        public void onNext(Object o) {
            numEvents.incrementAndGet();
            subscription.cancel();
        }

        @Override
        public void onError(Throwable throwable) {
        }

        @Override
        public void onComplete() {
        }
    };
    AsyncResponseTransformer<SdkResponse, Void> transformer = EventStreamAsyncResponseTransformer.builder().eventStreamResponseHandler(onEventStream(p -> p.subscribe(requestOneSubscriber))).eventResponseHandler((r, e) -> new Object()).executor(Executors.newSingleThreadExecutor()).future(new CompletableFuture<>()).build();
    transformer.prepare();
    transformer.onStream(SdkPublisher.adapt(bytePublisher));
    latch.await();
    assertThat(numEvents).as("Expected only one event to be delivered").hasValue(1);
}

Example 2 with AsyncResponseTransformer

use of software.amazon.awssdk.core.async.AsyncResponseTransformer in project aws-sdk-java-v2 by aws.

the class EventStreamAsyncResponseTransformerTest method verifyExceptionThrown.

private void verifyExceptionThrown(Map<String, HeaderValue> headers) {
    SdkServiceException exception = SdkServiceException.builder().build();
    Message exceptionMessage = new Message(headers, new byte[0]);
    Flowable<ByteBuffer> bytePublisher = Flowable.just(exceptionMessage.toByteBuffer());
    SubscribingResponseHandler handler = new SubscribingResponseHandler();
    AsyncResponseTransformer<SdkResponse, Void> transformer = EventStreamAsyncResponseTransformer.builder().eventStreamResponseHandler(handler).exceptionResponseHandler((response, executionAttributes) -> exception).executor(Executors.newSingleThreadExecutor()).future(new CompletableFuture<>()).build();
    CompletableFuture<Void> cf = transformer.prepare();
    transformer.onResponse(null);
    transformer.onStream(SdkPublisher.adapt(bytePublisher));
    assertThatThrownBy(() -> {
        try {
            cf.join();
        } catch (CompletionException e) {
            if (e.getCause() instanceof SdkServiceException) {
                throw e.getCause();
            }
        }
    }).isSameAs(exception);
    assertThat(handler.exceptionOccurredCalled).isTrue();
}

Example 3 with AsyncResponseTransformer

use of software.amazon.awssdk.core.async.AsyncResponseTransformer in project aws-sdk-java-v2 by aws.

the class DefaultJsonAsyncClient method streamingInputOutputOperation.

/**
 * Some operation with streaming input and streaming output
 *
 * @param streamingInputOutputOperationRequest
 * @param requestBody
 *        Functional interface that can be implemented to produce the request content in a non-blocking manner. The
 *        size of the content is expected to be known up front. See {@link AsyncRequestBody} for specific details on
 *        implementing this interface as well as links to precanned implementations for common scenarios like
 *        uploading from a file. The service documentation for the request content is as follows 'This be a stream'
 * @param asyncResponseTransformer
 *        The response transformer for processing the streaming response in a non-blocking manner. See
 *        {@link AsyncResponseTransformer} for details on how this callback should be implemented and for links to
 *        precanned implementations for common scenarios like downloading to a file. The service documentation for
 *        the response content is as follows 'This be a stream'.
 * @return A future to the transformed result of the AsyncResponseTransformer.<br/>
 *         The CompletableFuture returned by this method can be completed exceptionally with the following
 *         exceptions.
 *         <ul>
 *         <li>SdkException Base class for all exceptions that can be thrown by the SDK (both service and client).
 *         Can be used for catch all scenarios.</li>
 *         <li>SdkClientException If any client side error occurs such as an IO related failure, failure to get
 *         credentials, etc.</li>
 *         <li>JsonException Base class for all service exceptions. Unknown exceptions will be thrown as an instance
 *         of this type.</li>
 *         </ul>
 * @sample JsonAsyncClient.StreamingInputOutputOperation
 * @see <a href="https://docs.aws.amazon.com/goto/WebAPI/json-service-2010-05-08/StreamingInputOutputOperation"
 *      target="_top">AWS API Documentation</a>
 */
@Override
public <ReturnT> CompletableFuture<ReturnT> streamingInputOutputOperation(StreamingInputOutputOperationRequest streamingInputOutputOperationRequest, AsyncRequestBody requestBody, AsyncResponseTransformer<StreamingInputOutputOperationResponse, ReturnT> asyncResponseTransformer) {
    List<MetricPublisher> metricPublishers = resolveMetricPublishers(clientConfiguration, streamingInputOutputOperationRequest.overrideConfiguration().orElse(null));
    MetricCollector apiCallMetricCollector = metricPublishers.isEmpty() ? NoOpMetricCollector.create() : MetricCollector.create("ApiCall");
    try {
        apiCallMetricCollector.reportMetric(CoreMetric.SERVICE_ID, "Json Service");
        apiCallMetricCollector.reportMetric(CoreMetric.OPERATION_NAME, "StreamingInputOutputOperation");
        Pair<AsyncResponseTransformer<StreamingInputOutputOperationResponse, ReturnT>, CompletableFuture<Void>> pair = AsyncResponseTransformerUtils.wrapWithEndOfStreamFuture(asyncResponseTransformer);
        asyncResponseTransformer = pair.left();
        CompletableFuture<Void> endOfStreamFuture = pair.right();
        streamingInputOutputOperationRequest = applySignerOverride(streamingInputOutputOperationRequest, Aws4UnsignedPayloadSigner.create());
        JsonOperationMetadata operationMetadata = JsonOperationMetadata.builder().hasStreamingSuccessResponse(true).isPayloadJson(false).build();
        HttpResponseHandler<StreamingInputOutputOperationResponse> responseHandler = protocolFactory.createResponseHandler(operationMetadata, StreamingInputOutputOperationResponse::builder);
        HttpResponseHandler<AwsServiceException> errorResponseHandler = createErrorResponseHandler(protocolFactory, operationMetadata);
        CompletableFuture<ReturnT> executeFuture = clientHandler.execute(new ClientExecutionParams<StreamingInputOutputOperationRequest, StreamingInputOutputOperationResponse>().withOperationName("StreamingInputOutputOperation").withMarshaller(AsyncStreamingRequestMarshaller.builder().delegateMarshaller(new StreamingInputOutputOperationRequestMarshaller(protocolFactory)).asyncRequestBody(requestBody).transferEncoding(true).build()).withResponseHandler(responseHandler).withErrorResponseHandler(errorResponseHandler).withMetricCollector(apiCallMetricCollector).withAsyncRequestBody(requestBody).withInput(streamingInputOutputOperationRequest), asyncResponseTransformer);
        AsyncResponseTransformer<StreamingInputOutputOperationResponse, ReturnT> finalAsyncResponseTransformer = asyncResponseTransformer;
        CompletableFuture<ReturnT> whenCompleted = executeFuture.whenComplete((r, e) -> {
            if (e != null) {
                runAndLogError(log, "Exception thrown in exceptionOccurred callback, ignoring", () -> finalAsyncResponseTransformer.exceptionOccurred(e));
            }
            endOfStreamFuture.whenComplete((r2, e2) -> {
                metricPublishers.forEach(p -> p.publish(apiCallMetricCollector.collect()));
            });
        });
        executeFuture = CompletableFutureUtils.forwardExceptionTo(whenCompleted, executeFuture);
        return executeFuture;
    } catch (Throwable t) {
        AsyncResponseTransformer<StreamingInputOutputOperationResponse, ReturnT> finalAsyncResponseTransformer = asyncResponseTransformer;
        runAndLogError(log, "Exception thrown in exceptionOccurred callback, ignoring", () -> finalAsyncResponseTransformer.exceptionOccurred(t));
        metricPublishers.forEach(p -> p.publish(apiCallMetricCollector.collect()));
        return CompletableFutureUtils.failedFuture(t);
    }
}

Example 4 with AsyncResponseTransformer

use of software.amazon.awssdk.core.async.AsyncResponseTransformer in project aws-sdk-java-v2 by aws.

the class DefaultXmlAsyncClient method streamingOutputOperation.

/**
 * Some operation with a streaming output
 *
 * @param streamingOutputOperationRequest
 * @param asyncResponseTransformer
 *        The response transformer for processing the streaming response in a non-blocking manner. See
 *        {@link AsyncResponseTransformer} for details on how this callback should be implemented and for links to
 *        precanned implementations for common scenarios like downloading to a file. The service documentation for
 *        the response content is as follows 'This be a stream'.
 * @return A future to the transformed result of the AsyncResponseTransformer.<br/>
 *         The CompletableFuture returned by this method can be completed exceptionally with the following
 *         exceptions.
 *         <ul>
 *         <li>SdkException Base class for all exceptions that can be thrown by the SDK (both service and client).
 *         Can be used for catch all scenarios.</li>
 *         <li>SdkClientException If any client side error occurs such as an IO related failure, failure to get
 *         credentials, etc.</li>
 *         <li>XmlException Base class for all service exceptions. Unknown exceptions will be thrown as an instance
 *         of this type.</li>
 *         </ul>
 * @sample XmlAsyncClient.StreamingOutputOperation
 * @see <a href="https://docs.aws.amazon.com/goto/WebAPI/xml-service-2010-05-08/StreamingOutputOperation"
 *      target="_top">AWS API Documentation</a>
 */
@Override
public <ReturnT> CompletableFuture<ReturnT> streamingOutputOperation(StreamingOutputOperationRequest streamingOutputOperationRequest, AsyncResponseTransformer<StreamingOutputOperationResponse, ReturnT> asyncResponseTransformer) {
    List<MetricPublisher> metricPublishers = resolveMetricPublishers(clientConfiguration, streamingOutputOperationRequest.overrideConfiguration().orElse(null));
    MetricCollector apiCallMetricCollector = metricPublishers.isEmpty() ? NoOpMetricCollector.create() : MetricCollector.create("ApiCall");
    try {
        apiCallMetricCollector.reportMetric(CoreMetric.SERVICE_ID, "Xml Service");
        apiCallMetricCollector.reportMetric(CoreMetric.OPERATION_NAME, "StreamingOutputOperation");
        Pair<AsyncResponseTransformer<StreamingOutputOperationResponse, ReturnT>, CompletableFuture<Void>> pair = AsyncResponseTransformerUtils.wrapWithEndOfStreamFuture(asyncResponseTransformer);
        asyncResponseTransformer = pair.left();
        CompletableFuture<Void> endOfStreamFuture = pair.right();
        HttpResponseHandler<StreamingOutputOperationResponse> responseHandler = protocolFactory.createResponseHandler(StreamingOutputOperationResponse::builder, new XmlOperationMetadata().withHasStreamingSuccessResponse(true));
        HttpResponseHandler<AwsServiceException> errorResponseHandler = protocolFactory.createErrorResponseHandler();
        CompletableFuture<ReturnT> executeFuture = clientHandler.execute(new ClientExecutionParams<StreamingOutputOperationRequest, StreamingOutputOperationResponse>().withOperationName("StreamingOutputOperation").withMarshaller(new StreamingOutputOperationRequestMarshaller(protocolFactory)).withResponseHandler(responseHandler).withErrorResponseHandler(errorResponseHandler).withMetricCollector(apiCallMetricCollector).withInput(streamingOutputOperationRequest), asyncResponseTransformer);
        CompletableFuture<ReturnT> whenCompleteFuture = null;
        AsyncResponseTransformer<StreamingOutputOperationResponse, ReturnT> finalAsyncResponseTransformer = asyncResponseTransformer;
        whenCompleteFuture = executeFuture.whenComplete((r, e) -> {
            if (e != null) {
                runAndLogError(log, "Exception thrown in exceptionOccurred callback, ignoring", () -> finalAsyncResponseTransformer.exceptionOccurred(e));
            }
            endOfStreamFuture.whenComplete((r2, e2) -> {
                metricPublishers.forEach(p -> p.publish(apiCallMetricCollector.collect()));
            });
        });
        return CompletableFutureUtils.forwardExceptionTo(whenCompleteFuture, executeFuture);
    } catch (Throwable t) {
        AsyncResponseTransformer<StreamingOutputOperationResponse, ReturnT> finalAsyncResponseTransformer = asyncResponseTransformer;
        runAndLogError(log, "Exception thrown in exceptionOccurred callback, ignoring", () -> finalAsyncResponseTransformer.exceptionOccurred(t));
        metricPublishers.forEach(p -> p.publish(apiCallMetricCollector.collect()));
        return CompletableFutureUtils.failedFuture(t);
    }
}

Example 5 with AsyncResponseTransformer

use of software.amazon.awssdk.core.async.AsyncResponseTransformer in project aws-sdk-java-v2 by aws.

the class DefaultXmlAsyncClient method eventStreamOperation.

/**
 * Invokes the EventStreamOperation operation asynchronously.
 *
 * @param eventStreamOperationRequest
 * @return A Java Future containing the result of the EventStreamOperation operation returned by the service.<br/>
 *         The CompletableFuture returned by this method can be completed exceptionally with the following
 *         exceptions.
 *         <ul>
 *         <li>SdkException Base class for all exceptions that can be thrown by the SDK (both service and client).
 *         Can be used for catch all scenarios.</li>
 *         <li>SdkClientException If any client side error occurs such as an IO related failure, failure to get
 *         credentials, etc.</li>
 *         <li>XmlException Base class for all service exceptions. Unknown exceptions will be thrown as an instance
 *         of this type.</li>
 *         </ul>
 * @sample XmlAsyncClient.EventStreamOperation
 * @see <a href="https://docs.aws.amazon.com/goto/WebAPI/xml-service-2010-05-08/EventStreamOperation"
 *      target="_top">AWS API Documentation</a>
 */
@Override
public CompletableFuture<Void> eventStreamOperation(EventStreamOperationRequest eventStreamOperationRequest, EventStreamOperationResponseHandler asyncResponseHandler) {
    List<MetricPublisher> metricPublishers = resolveMetricPublishers(clientConfiguration, eventStreamOperationRequest.overrideConfiguration().orElse(null));
    MetricCollector apiCallMetricCollector = metricPublishers.isEmpty() ? NoOpMetricCollector.create() : MetricCollector.create("ApiCall");
    try {
        apiCallMetricCollector.reportMetric(CoreMetric.SERVICE_ID, "Xml Service");
        apiCallMetricCollector.reportMetric(CoreMetric.OPERATION_NAME, "EventStreamOperation");
        HttpResponseHandler<EventStreamOperationResponse> responseHandler = protocolFactory.createResponseHandler(EventStreamOperationResponse::builder, XmlOperationMetadata.builder().hasStreamingSuccessResponse(true).build());
        HttpResponseHandler<AwsServiceException> errorResponseHandler = protocolFactory.createErrorResponseHandler();
        HttpResponseHandler<? extends EventStream> eventResponseHandler = protocolFactory.createResponseHandler(EventStreamTaggedUnionPojoSupplier.builder().putSdkPojoSupplier("EventPayloadEvent", EventStream::eventPayloadEventBuilder).putSdkPojoSupplier("NonEventPayloadEvent", EventStream::nonEventPayloadEventBuilder).putSdkPojoSupplier("SecondEventPayloadEvent", EventStream::secondEventPayloadEventBuilder).defaultSdkPojoSupplier(() -> new SdkPojoBuilder(EventStream.UNKNOWN)).build(), XmlOperationMetadata.builder().hasStreamingSuccessResponse(false).build());
        CompletableFuture<Void> eventStreamTransformFuture = new CompletableFuture<>();
        EventStreamAsyncResponseTransformer<EventStreamOperationResponse, EventStream> asyncResponseTransformer = EventStreamAsyncResponseTransformer.<EventStreamOperationResponse, EventStream>builder().eventStreamResponseHandler(asyncResponseHandler).eventResponseHandler(eventResponseHandler).initialResponseHandler(responseHandler).exceptionResponseHandler(errorResponseHandler).future(eventStreamTransformFuture).executor(executor).serviceName(serviceName()).build();
        RestEventStreamAsyncResponseTransformer<EventStreamOperationResponse, EventStream> restAsyncResponseTransformer = RestEventStreamAsyncResponseTransformer.<EventStreamOperationResponse, EventStream>builder().eventStreamAsyncResponseTransformer(asyncResponseTransformer).eventStreamResponseHandler(asyncResponseHandler).build();
        CompletableFuture<Void> executeFuture = clientHandler.execute(new ClientExecutionParams<EventStreamOperationRequest, EventStreamOperationResponse>().withOperationName("EventStreamOperation").withMarshaller(new EventStreamOperationRequestMarshaller(protocolFactory)).withResponseHandler(responseHandler).withErrorResponseHandler(errorResponseHandler).withMetricCollector(apiCallMetricCollector).withInput(eventStreamOperationRequest), restAsyncResponseTransformer);
        CompletableFuture<Void> whenCompleteFuture = null;
        whenCompleteFuture = executeFuture.whenComplete((r, e) -> {
            if (e != null) {
                runAndLogError(log, "Exception thrown in exceptionOccurred callback, ignoring", () -> asyncResponseHandler.exceptionOccurred(e));
                eventStreamTransformFuture.completeExceptionally(e);
            }
            metricPublishers.forEach(p -> p.publish(apiCallMetricCollector.collect()));
        });
        CompletableFutureUtils.forwardExceptionTo(whenCompleteFuture, executeFuture);
        return CompletableFutureUtils.forwardExceptionTo(eventStreamTransformFuture, executeFuture);
    } catch (Throwable t) {
        runAndLogError(log, "Exception thrown in exceptionOccurred callback, ignoring", () -> asyncResponseHandler.exceptionOccurred(t));
        metricPublishers.forEach(p -> p.publish(apiCallMetricCollector.collect()));
        return CompletableFutureUtils.failedFuture(t);
    }
}