Examples with ClientResponse com.metamx.http.client.response.ClientResponse used on opensource projects

Example 1 with ClientResponse

use of com.metamx.http.client.response.ClientResponse in project druid by druid-io.

the class DirectDruidClient method run.

@Override
public Sequence<T> run(final Query<T> query, final Map<String, Object> context) {
    QueryToolChest<T, Query<T>> toolChest = warehouse.getToolChest(query);
    boolean isBySegment = BaseQuery.getContextBySegment(query, false);
    Pair<JavaType, JavaType> types = typesMap.get(query.getClass());
    if (types == null) {
        final TypeFactory typeFactory = objectMapper.getTypeFactory();
        JavaType baseType = typeFactory.constructType(toolChest.getResultTypeReference());
        JavaType bySegmentType = typeFactory.constructParametricType(Result.class, typeFactory.constructParametricType(BySegmentResultValueClass.class, baseType));
        types = Pair.of(baseType, bySegmentType);
        typesMap.put(query.getClass(), types);
    }
    final JavaType typeRef;
    if (isBySegment) {
        typeRef = types.rhs;
    } else {
        typeRef = types.lhs;
    }
    final ListenableFuture<InputStream> future;
    final String url = String.format("http://%s/druid/v2/", host);
    final String cancelUrl = String.format("http://%s/druid/v2/%s", host, query.getId());
    try {
        log.debug("Querying queryId[%s] url[%s]", query.getId(), url);
        final long requestStartTime = System.currentTimeMillis();
        final ServiceMetricEvent.Builder builder = toolChest.makeMetricBuilder(query);
        builder.setDimension("server", host);
        final HttpResponseHandler<InputStream, InputStream> responseHandler = new HttpResponseHandler<InputStream, InputStream>() {

            private long responseStartTime;

            private final AtomicLong byteCount = new AtomicLong(0);

            private final BlockingQueue<InputStream> queue = new LinkedBlockingQueue<>();

            private final AtomicBoolean done = new AtomicBoolean(false);

            @Override
            public ClientResponse<InputStream> handleResponse(HttpResponse response) {
                log.debug("Initial response from url[%s] for queryId[%s]", url, query.getId());
                responseStartTime = System.currentTimeMillis();
                emitter.emit(builder.build("query/node/ttfb", responseStartTime - requestStartTime));
                try {
                    final String responseContext = response.headers().get("X-Druid-Response-Context");
                    // context may be null in case of error or query timeout
                    if (responseContext != null) {
                        context.putAll(objectMapper.<Map<String, Object>>readValue(responseContext, new TypeReference<Map<String, Object>>() {
                        }));
                    }
                    queue.put(new ChannelBufferInputStream(response.getContent()));
                } catch (final IOException e) {
                    log.error(e, "Error parsing response context from url [%s]", url);
                    return ClientResponse.<InputStream>finished(new InputStream() {

                        @Override
                        public int read() throws IOException {
                            throw e;
                        }
                    });
                } catch (InterruptedException e) {
                    log.error(e, "Queue appending interrupted");
                    Thread.currentThread().interrupt();
                    throw Throwables.propagate(e);
                }
                byteCount.addAndGet(response.getContent().readableBytes());
                return ClientResponse.<InputStream>finished(new SequenceInputStream(new Enumeration<InputStream>() {

                    @Override
                    public boolean hasMoreElements() {
                        // Then the stream should be spouting good InputStreams.
                        synchronized (done) {
                            return !done.get() || !queue.isEmpty();
                        }
                    }

                    @Override
                    public InputStream nextElement() {
                        try {
                            return queue.take();
                        } catch (InterruptedException e) {
                            Thread.currentThread().interrupt();
                            throw Throwables.propagate(e);
                        }
                    }
                }));
            }

            @Override
            public ClientResponse<InputStream> handleChunk(ClientResponse<InputStream> clientResponse, HttpChunk chunk) {
                final ChannelBuffer channelBuffer = chunk.getContent();
                final int bytes = channelBuffer.readableBytes();
                if (bytes > 0) {
                    try {
                        queue.put(new ChannelBufferInputStream(channelBuffer));
                    } catch (InterruptedException e) {
                        log.error(e, "Unable to put finalizing input stream into Sequence queue for url [%s]", url);
                        Thread.currentThread().interrupt();
                        throw Throwables.propagate(e);
                    }
                    byteCount.addAndGet(bytes);
                }
                return clientResponse;
            }

            @Override
            public ClientResponse<InputStream> done(ClientResponse<InputStream> clientResponse) {
                long stopTime = System.currentTimeMillis();
                log.debug("Completed queryId[%s] request to url[%s] with %,d bytes returned in %,d millis [%,f b/s].", query.getId(), url, byteCount.get(), stopTime - responseStartTime, byteCount.get() / (0.0001 * (stopTime - responseStartTime)));
                emitter.emit(builder.build("query/node/time", stopTime - requestStartTime));
                emitter.emit(builder.build("query/node/bytes", byteCount.get()));
                synchronized (done) {
                    try {
                        // An empty byte array is put at the end to give the SequenceInputStream.close() as something to close out
                        // after done is set to true, regardless of the rest of the stream's state.
                        queue.put(ByteSource.empty().openStream());
                    } catch (InterruptedException e) {
                        log.error(e, "Unable to put finalizing input stream into Sequence queue for url [%s]", url);
                        Thread.currentThread().interrupt();
                        throw Throwables.propagate(e);
                    } catch (IOException e) {
                        // This should never happen
                        throw Throwables.propagate(e);
                    } finally {
                        done.set(true);
                    }
                }
                return ClientResponse.<InputStream>finished(clientResponse.getObj());
            }

            @Override
            public void exceptionCaught(final ClientResponse<InputStream> clientResponse, final Throwable e) {
                // Don't wait for lock in case the lock had something to do with the error
                synchronized (done) {
                    done.set(true);
                    // Make a best effort to put a zero length buffer into the queue in case something is waiting on the take()
                    // If nothing is waiting on take(), this will be closed out anyways.
                    queue.offer(new InputStream() {

                        @Override
                        public int read() throws IOException {
                            throw new IOException(e);
                        }
                    });
                }
            }
        };
        future = httpClient.go(new Request(HttpMethod.POST, new URL(url)).setContent(objectMapper.writeValueAsBytes(query)).setHeader(HttpHeaders.Names.CONTENT_TYPE, isSmile ? SmileMediaTypes.APPLICATION_JACKSON_SMILE : MediaType.APPLICATION_JSON), responseHandler);
        queryWatcher.registerQuery(query, future);
        openConnections.getAndIncrement();
        Futures.addCallback(future, new FutureCallback<InputStream>() {

            @Override
            public void onSuccess(InputStream result) {
                openConnections.getAndDecrement();
            }

            @Override
            public void onFailure(Throwable t) {
                openConnections.getAndDecrement();
                if (future.isCancelled()) {
                    // forward the cancellation to underlying queriable node
                    try {
                        StatusResponseHolder res = httpClient.go(new Request(HttpMethod.DELETE, new URL(cancelUrl)).setContent(objectMapper.writeValueAsBytes(query)).setHeader(HttpHeaders.Names.CONTENT_TYPE, isSmile ? SmileMediaTypes.APPLICATION_JACKSON_SMILE : MediaType.APPLICATION_JSON), new StatusResponseHandler(Charsets.UTF_8)).get();
                        if (res.getStatus().getCode() >= 500) {
                            throw new RE("Error cancelling query[%s]: queriable node returned status[%d] [%s].", res.getStatus().getCode(), res.getStatus().getReasonPhrase());
                        }
                    } catch (IOException | ExecutionException | InterruptedException e) {
                        Throwables.propagate(e);
                    }
                }
            }
        });
    } catch (IOException e) {
        throw Throwables.propagate(e);
    }
    Sequence<T> retVal = new BaseSequence<>(new BaseSequence.IteratorMaker<T, JsonParserIterator<T>>() {

        @Override
        public JsonParserIterator<T> make() {
            return new JsonParserIterator<T>(typeRef, future, url);
        }

        @Override
        public void cleanup(JsonParserIterator<T> iterFromMake) {
            CloseQuietly.close(iterFromMake);
        }
    });
    // avoid the cost of de-serializing and then re-serializing again when adding to cache
    if (!isBySegment) {
        retVal = Sequences.map(retVal, toolChest.makePreComputeManipulatorFn(query, MetricManipulatorFns.deserializing()));
    }
    return retVal;
}

Example 2 with ClientResponse

use of com.metamx.http.client.response.ClientResponse in project hive by apache.

the class ResponseCookieHandler method handleResponse.

@Override
public ClientResponse<Intermediate> handleResponse(HttpResponse httpResponse) {
    try {
        final HttpHeaders headers = httpResponse.headers();
        manager.put(uri, Maps.asMap(headers.names(), input -> headers.getAll(input)));
    } catch (IOException e) {
        log.error("Error while processing Cookies from header", e);
    } finally {
        return delegate.handleResponse(httpResponse);
    }
}