com.ning.http.client.AsyncHandler Java Examples

@Test
 public void test() throws Exception {
     AsyncHttpClient client = new AsyncHttpClient();
     
     try {
         Future<Response> f = client.preparePost(webServer.getCallHttpUrl()).addParameter("param1", "value1").execute();
         Response response = f.get();
     } finally {
         client.close();
     }
     
     PluginTestVerifier verifier = PluginTestVerifierHolder.getInstance();
     verifier.printCache();

     String destinationId = webServer.getHostAndPort();
     String httpUrl = webServer.getCallHttpUrl();
     verifier.verifyTrace(event("ASYNC_HTTP_CLIENT", AsyncHttpClient.class.getMethod("executeRequest", Request.class, AsyncHandler.class), null, null, destinationId,
             annotation("http.url", httpUrl)));
     verifier.verifyTraceCount(0);
}
 

/**
 * Critical execute a request (will not lookup in cache nor load into cache).
 *
 * @param request Request to critical execute
 * @param asyncHandler Request async handler
 * @param <T> Response type
 * @return {@literal CompletableFuture<T>}
 */
public <T> CompletableFuture<T> criticalExecute(
    final ParsecAsyncHttpRequest request,
    AsyncHandler<T> asyncHandler
) {
    AsyncHandler<T> practicalAsyncHandler =
        oldFashionProfiling? new ParsecAsyncHandlerWrapper<>(asyncHandler, request.getNingRequest()): asyncHandler;

    if (request.getRetryStatusCodes().isEmpty() && request.getRetryExceptions().isEmpty()) {
        return new ParsecCompletableFuture<>(
            client.executeRequest(request.getNingRequest(), practicalAsyncHandler)
        );
    } else {
        ParsecHttpRequestRetryCallable<T> retryCallable;
        retryCallable = retryIntervalMillisOpt.map(retryIntervalMillis -> new ParsecHttpRequestRetryCallable<>(
            client, request, practicalAsyncHandler, retryIntervalMillis))
            .orElseGet(() -> new ParsecHttpRequestRetryCallable<>(client, request, practicalAsyncHandler));
        return new ParsecCompletableFuture<>(executorService.submit(retryCallable));
    }
}
 

/**
 * Constructor.
 *
 * @param asyncHandler asyncHandler
 * @param loggingPredicate
 */
public LoggingAsyncHandlerWrapper(final AsyncHandler<T> asyncHandler, final Request ningRequest,
                                  BiPredicate<Request, ResponseOrThrowable> loggingPredicate,
                                  NingRequestResponseFormatter formatter,
                                  String loggerName) {

    this.asyncHandler = asyncHandler;
    extensions = (asyncHandler instanceof AsyncHandlerExtensions)
            ? (AsyncHandlerExtensions) asyncHandler : null;
    progressAsyncHandler = (asyncHandler instanceof ProgressAsyncHandler)
            ? (ProgressAsyncHandler<T>) asyncHandler : null;
    this.progress = new ParsecAsyncProgress();
    this.ningRequest = ningRequest;
    this.loggingPredicate = loggingPredicate;
    this.formatter = formatter;
    this.traceLogger = LoggerFactory.getLogger(loggerName);
}
 

/**
 * Constructor.
 *
 * @param client              client
 * @param request             request
 * @param asyncHandler        async handler
 * @param retryIntervalMillis retry interval in milliseconds
 */
public ParsecHttpRequestRetryCallable(
    final AsyncHttpClient client,
    final ParsecAsyncHttpRequest request,
    final AsyncHandler<T> asyncHandler,
    long retryIntervalMillis
) {
    this.client = client;
    this.request = request;
    this.asyncHandler = asyncHandler;
    this.retryDelayer = new RetryDelayer(retryIntervalMillis);
    responses = new ArrayList<>();
}
 

public AsyncHandler.STATE onBodyPartReceived(HttpResponseBodyPart bodyPart) throws Exception {
  // body arrived, flush headers
  if (!responseSet) {
    response = responseBuilder.build();
    responseSet = true;
    headersArrived.countDown();
  }
  bodyPart.writeTo(output);
  return AsyncHandler.STATE.CONTINUE;
}
 

@Override
public void transactionMarker() throws Exception {
    AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicInteger statusCode = new AtomicInteger();
    asyncHttpClient.prepareGet("http://localhost:" + getPort() + "/hello3/")
            .execute(new AsyncHandler<Response>() {
                @Override
                public STATE onBodyPartReceived(HttpResponseBodyPart part) {
                    return null;
                }
                @Override
                public Response onCompleted() throws Exception {
                    latch.countDown();
                    return null;
                }
                @Override
                public STATE onHeadersReceived(HttpResponseHeaders headers) {
                    return null;
                }
                @Override
                public STATE onStatusReceived(HttpResponseStatus status) {
                    statusCode.set(status.getStatusCode());
                    return null;
                }
                @Override
                public void onThrowable(Throwable t) {}
            });
    latch.await();
    asyncHttpClient.close();
    if (statusCode.get() != 200) {
        throw new IllegalStateException("Unexpected status code: " + statusCode);
    }
}
 

/**
 * Package-private Constructor. Only for unit-test usage.
 *
 * @param client              client
 * @param request             request
 * @param asyncHandler        async handler
 * @param retryDelayer        custom retry Delayer
 */
ParsecHttpRequestRetryCallable(
    final AsyncHttpClient client,
    final ParsecAsyncHttpRequest request,
    final AsyncHandler<T> asyncHandler,
    RetryDelayer retryDelayer
) {
    this.client = client;
    this.request = request;
    this.asyncHandler = asyncHandler;
    this.retryDelayer = retryDelayer;
    responses = new ArrayList<>();
}
 

public Builder(AsyncHttpClientConfig config, Request request, AsyncHandler<T> asyncHandler) {
	this.config = config;
	this.request = request;
	this.asyncHandler = asyncHandler;
	this.future = null;
}
 

public Builder(AsyncHttpClientConfig config, Request request, AsyncHandler<T> asyncHandler, NettyResponseFuture<T> future) {
	this.config = config;
	this.request = request;
	this.asyncHandler = asyncHandler;
	this.future = future;
}
 

public <T> Future<T> execute(final Request request, final AsyncHandler<T> asyncHandler) throws IOException {
	return doConnect(request,asyncHandler, null);
}
 

private <T> Future<T> doConnect(final Request request, final AsyncHandler<T> asyncHandler, NettyResponseFuture<T> f) throws IOException{

		if (isClose.get()){
			throw new IOException("Closed");
		}

		if (activeConnectionsCount.getAndIncrement() >= config.getMaxTotalConnections()) {
			throw new IOException("Too many connections");
		}
		URI uri = createUri(request.getUrl());

		if (log.isDebugEnabled())
			log.debug("Lookup cache: " + uri.toString());

		Channel channel = lookupInCache(uri);
		if (channel != null && channel.isOpen()) {
			HttpRequest nettyRequest = buildRequest(config,request,uri);
			if (f == null) {
				f = new NettyResponseFuture<T>(uri, request, asyncHandler,
						nettyRequest, config.getRequestTimeoutInMs());
			}
			executeRequest(channel, config,f,nettyRequest);
			return f;
		}
		ConnectListener<T> c = new ConnectListener.Builder<T>(config, request, asyncHandler,f).build();
		configure(uri.getScheme().compareToIgnoreCase("https") == 0, c);

		ChannelFuture channelFuture;
		try{
			if (config.getProxyServer() == null) {
				channelFuture = bootstrap.connect(new InetSocketAddress(uri.getHost(), getPort(uri)));
			} else {
				channelFuture = bootstrap.connect(
						new InetSocketAddress(config.getProxyServer().getHost(), config.getProxyServer().getPort()));
			}
			bootstrap.setOption("connectTimeout", config.getConnectionTimeoutInMs());
		} catch (Throwable t){
			activeConnectionsCount.decrementAndGet();
			log.error(t);
			c.future().abort(t.getCause());
			return c.future();
		}
		channelFuture.addListener(c);
		openChannels.add(channelFuture.getChannel());
		return c.future();
	}
 

@SuppressWarnings("unchecked")
private final boolean updateStatusAndInterrupt(AsyncHandler handler, HttpResponseStatus c) throws Exception {
	return handler.onStatusReceived(c) != STATE.CONTINUE;
}
 

@SuppressWarnings("unchecked")
private final boolean updateHeadersAndInterrupt(AsyncHandler handler, HttpResponseHeaders c) throws Exception {
	return handler.onHeadersReceived(c) != STATE.CONTINUE;
}
 

@SuppressWarnings("unchecked")
private final boolean updateBodyAndInterrupt(AsyncHandler handler, HttpResponseBodyPart c) throws Exception {
	return handler.onBodyPartReceived(c) != STATE.CONTINUE;
}
 

@DataProvider(value = {
    "true   |   true",
    "true   |   false",
    "false  |   true",
    "false  |   false"
}, splitBy = "\\|")
@Test
public void executeAsyncHttpRequest_sets_up_and_executes_call_as_expected(
    boolean performSubspan, boolean currentTracingInfoNull
) {
    // given
    Whitebox.setInternalState(helperSpy, "performSubSpanAroundDownstreamCalls", performSubspan);

    CircuitBreaker<Response> circuitBreakerMock = mock(CircuitBreaker.class);
    doReturn(Optional.of(circuitBreakerMock)).when(helperSpy).getCircuitBreaker(any(RequestBuilderWrapper.class));
    ManualModeTask<Response> cbManualTaskMock = mock(ManualModeTask.class);
    doReturn(cbManualTaskMock).when(circuitBreakerMock).newManualModeTask();

    String url = "http://localhost/some/path";
    String method = "GET";
    AsyncHttpClient.BoundRequestBuilder reqMock = mock(AsyncHttpClient.BoundRequestBuilder.class);
    RequestBuilderWrapper rbw = new RequestBuilderWrapper(url, method, reqMock, Optional.empty(), false);
    AsyncResponseHandler responseHandlerMock = mock(AsyncResponseHandler.class);

    Span initialSpan = (currentTracingInfoNull) ? null : Tracer.getInstance().startRequestWithRootSpan("foo");
    Deque<Span> initialSpanStack = (currentTracingInfoNull)
                                   ? null
                                   : Tracer.getInstance().getCurrentSpanStackCopy();
    Map<String, String> initialMdc = (currentTracingInfoNull) ? null : MDC.getCopyOfContextMap();
    resetTracingAndMdc();

    // when
    CompletableFuture resultFuture = helperSpy.executeAsyncHttpRequest(
        rbw, responseHandlerMock, initialSpanStack, initialMdc
    );

    // then
    // Verify that the circuit breaker came from the getCircuitBreaker helper method and that its
    //      throwExceptionIfCircuitBreakerIsOpen() method was called.
    verify(helperSpy).getCircuitBreaker(rbw);
    verify(cbManualTaskMock).throwExceptionIfCircuitBreakerIsOpen();

    // Verify that the inner request's execute method was called with a
    //      AsyncCompletionHandlerWithTracingAndMdcSupport for the handler.
    ArgumentCaptor<AsyncHandler> executedHandlerCaptor = ArgumentCaptor.forClass(AsyncHandler.class);
    verify(reqMock).execute(executedHandlerCaptor.capture());
    AsyncHandler executedHandler = executedHandlerCaptor.getValue();
    assertThat(executedHandler).isInstanceOf(AsyncCompletionHandlerWithTracingAndMdcSupport.class);

    // Verify that the AsyncCompletionHandlerWithTracingAndMdcSupport was created with the expected args
    AsyncCompletionHandlerWithTracingAndMdcSupport achwtams =
        (AsyncCompletionHandlerWithTracingAndMdcSupport) executedHandler;
    assertThat(achwtams.completableFutureResponse).isSameAs(resultFuture);
    assertThat(achwtams.responseHandlerFunction).isSameAs(responseHandlerMock);
    assertThat(achwtams.performSubSpanAroundDownstreamCalls).isEqualTo(performSubspan);
    assertThat(achwtams.circuitBreakerManualTask).isEqualTo(Optional.of(cbManualTaskMock));
    if (performSubspan) {
        int initialSpanStackSize = (initialSpanStack == null) ? 0 : initialSpanStack.size();
        assertThat(achwtams.distributedTraceStackToUse).hasSize(initialSpanStackSize + 1);
        Span subspan = (Span) achwtams.distributedTraceStackToUse.peek();
        assertThat(subspan.getSpanName())
            .isEqualTo(initialSpanNameFromStrategy.get());
        if (initialSpan != null) {
            assertThat(subspan.getTraceId()).isEqualTo(initialSpan.getTraceId());
            assertThat(subspan.getParentSpanId()).isEqualTo(initialSpan.getSpanId());
        }
        assertThat(achwtams.mdcContextToUse.get(SpanFieldForLoggerMdc.TRACE_ID.mdcKey)).isEqualTo(subspan.getTraceId());
    }
    else {
        assertThat(achwtams.distributedTraceStackToUse).isSameAs(initialSpanStack);
        assertThat(achwtams.mdcContextToUse).isSameAs(initialMdc);
    }

    // Verify that the trace headers were added (or not depending on state).
    Span spanForDownstreamCall = achwtams.getSpanForCall();
    if (initialSpan == null && !performSubspan) {
        assertThat(spanForDownstreamCall).isNull();
        verifyNoMoreInteractions(reqMock);
    }
    else {
        assertThat(spanForDownstreamCall).isNotNull();
        verify(reqMock).setHeader(TraceHeaders.TRACE_SAMPLED,
                                  convertSampleableBooleanToExpectedB3Value(spanForDownstreamCall.isSampleable()));
        verify(reqMock).setHeader(TraceHeaders.TRACE_ID, spanForDownstreamCall.getTraceId());
        verify(reqMock).setHeader(TraceHeaders.SPAN_ID, spanForDownstreamCall.getSpanId());
        if (spanForDownstreamCall.getParentSpanId() == null) {
            verify(reqMock, never()).setHeader(eq(TraceHeaders.PARENT_SPAN_ID), anyString());
        }
        else {
            verify(reqMock).setHeader(TraceHeaders.PARENT_SPAN_ID, spanForDownstreamCall.getParentSpanId());
        }
        verify(reqMock, never()).setHeader(eq(TraceHeaders.SPAN_NAME), anyString());
    }

    // Verify that any subspan had request tagging performed.
    if (performSubspan) {
        strategyRequestTaggingArgs.get().verifyArgs(spanForDownstreamCall, rbw, wingtipsTagAndNamingAdapterMock);
    }
}
 

private void doTest(Request request) throws InterruptedException, ExecutionException, IOException {
	final PipedOutputStream pipedOutputStream = new PipedOutputStream();
	final PipedInputStream pipedInputStream = new PipedInputStream(pipedOutputStream);

	AsyncHandler<Response> asyncHandler = new AsyncHandler<Response>() {
		private final Response.ResponseBuilder builder = new Response.ResponseBuilder();

		@Override
		public STATE onBodyPartReceived(final HttpResponseBodyPart content) throws Exception {
			content.writeTo(pipedOutputStream);
			return STATE.CONTINUE;
		}

		@Override
		public STATE onStatusReceived(final HttpResponseStatus status) throws Exception {
			builder.accumulate(status);
			return STATE.CONTINUE;
		}

		@Override
		public STATE onHeadersReceived(final HttpResponseHeaders headers) throws Exception {
			builder.accumulate(headers);
			return STATE.CONTINUE;
		}

		@Override
		public Response onCompleted() throws Exception {

			LOGGER.info("On complete called!");

			pipedOutputStream.flush();
			pipedOutputStream.close();

			return builder.build();

		}

		@Override
		public void onThrowable(Throwable arg0) {
			// TODO Auto-generated method stub
			LOGGER.error("Error: {}", arg0);
			onTestFailed();
		}

	};

	Future<Void> readingThreadFuture = Executors.newCachedThreadPool().submit(new Callable<Void>() {

		@Override
		public Void call() throws Exception {
			BufferedReader reader = new BufferedReader(new InputStreamReader(pipedInputStream));

			String readPrediction;

			int numPredictionsRead = 0;

			while ((readPrediction = reader.readLine()) != null) {
				//LOGGER.info("Got prediction: {}", readPrediction);
				numPredictionsRead++;
			}

			LOGGER.info("Read a total of {} predictions", numPredictionsRead);
			Assert.assertEquals(roundsOfDataToSubmit * 272274, numPredictionsRead);

			return null;
		}
	});

	Builder config = new AsyncHttpClientConfig.Builder();

	config.setRequestTimeoutInMs(-1); //need to set this to -1, to indicate wait forever. setting to 0 actually means a 0 ms timeout!

	AsyncHttpClient client = new AsyncHttpClient(config.build());

	client.executeRequest(request, asyncHandler).get();

	readingThreadFuture.get(); //verify no exceptions occurred when reading predictions

	client.close();

	Assert.assertFalse(getTestFailed());
}
 

public AsyncHandler.STATE onStatusReceived(HttpResponseStatus responseStatus) throws Exception {
  responseBuilder.reset();
  responseBuilder.accumulate(responseStatus);
  statusReceived = true;
  return AsyncHandler.STATE.CONTINUE;
}
 

public AsyncHandler.STATE onHeadersReceived(HttpResponseHeaders headers) throws Exception {
  responseBuilder.accumulate(headers);
  return AsyncHandler.STATE.CONTINUE;
}
 

/**
 * Constructor.
 *
 * @param client       client
 * @param request      request
 * @param asyncHandler async handler
 */
public ParsecHttpRequestRetryCallable(
    final AsyncHttpClient client, final ParsecAsyncHttpRequest request, final AsyncHandler<T> asyncHandler) {
    this(client, request, asyncHandler, DEFAULT_RETRY_INTERVAL);
}