Examples with SequenceInputStream java.io.SequenceInputStream used on opensource projects

Example 41 with SequenceInputStream

use of java.io.SequenceInputStream in project druid by druid-io.

the class DirectDruidClient method run.

@Override
public Sequence<T> run(final QueryPlus<T> queryPlus, final ResponseContext context) {
    final Query<T> query = queryPlus.getQuery();
    QueryToolChest<T, Query<T>> toolChest = warehouse.getToolChest(query);
    boolean isBySegment = QueryContexts.isBySegment(query);
    final JavaType queryResultType = isBySegment ? toolChest.getBySegmentResultType() : toolChest.getBaseResultType();
    final ListenableFuture<InputStream> future;
    final String url = scheme + "://" + host + "/druid/v2/";
    final String cancelUrl = url + query.getId();
    try {
        log.debug("Querying queryId[%s] url[%s]", query.getId(), url);
        final long requestStartTimeNs = System.nanoTime();
        final long timeoutAt = query.getContextValue(QUERY_FAIL_TIME);
        final long maxScatterGatherBytes = QueryContexts.getMaxScatterGatherBytes(query);
        final AtomicLong totalBytesGathered = context.getTotalBytes();
        final long maxQueuedBytes = QueryContexts.getMaxQueuedBytes(query, 0);
        final boolean usingBackpressure = maxQueuedBytes > 0;
        final HttpResponseHandler<InputStream, InputStream> responseHandler = new HttpResponseHandler<InputStream, InputStream>() {

            private final AtomicLong totalByteCount = new AtomicLong(0);

            private final AtomicLong queuedByteCount = new AtomicLong(0);

            private final AtomicLong channelSuspendedTime = new AtomicLong(0);

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

            private final AtomicBoolean done = new AtomicBoolean(false);

            private final AtomicReference<String> fail = new AtomicReference<>();

            private final AtomicReference<TrafficCop> trafficCopRef = new AtomicReference<>();

            private QueryMetrics<? super Query<T>> queryMetrics;

            private long responseStartTimeNs;

            private QueryMetrics<? super Query<T>> acquireResponseMetrics() {
                if (queryMetrics == null) {
                    queryMetrics = toolChest.makeMetrics(query);
                    queryMetrics.server(host);
                }
                return queryMetrics;
            }

            /**
             * Queue a buffer. Returns true if we should keep reading, false otherwise.
             */
            private boolean enqueue(ChannelBuffer buffer, long chunkNum) throws InterruptedException {
                // Increment queuedByteCount before queueing the object, so queuedByteCount is at least as high as
                // the actual number of queued bytes at any particular time.
                final InputStreamHolder holder = InputStreamHolder.fromChannelBuffer(buffer, chunkNum);
                final long currentQueuedByteCount = queuedByteCount.addAndGet(holder.getLength());
                queue.put(holder);
                // True if we should keep reading.
                return !usingBackpressure || currentQueuedByteCount < maxQueuedBytes;
            }

            private InputStream dequeue() throws InterruptedException {
                final InputStreamHolder holder = queue.poll(checkQueryTimeout(), TimeUnit.MILLISECONDS);
                if (holder == null) {
                    throw new QueryTimeoutException(StringUtils.nonStrictFormat("Query[%s] url[%s] timed out.", query.getId(), url));
                }
                final long currentQueuedByteCount = queuedByteCount.addAndGet(-holder.getLength());
                if (usingBackpressure && currentQueuedByteCount < maxQueuedBytes) {
                    long backPressureTime = Preconditions.checkNotNull(trafficCopRef.get(), "No TrafficCop, how can this be?").resume(holder.getChunkNum());
                    channelSuspendedTime.addAndGet(backPressureTime);
                }
                return holder.getStream();
            }

            @Override
            public ClientResponse<InputStream> handleResponse(HttpResponse response, TrafficCop trafficCop) {
                trafficCopRef.set(trafficCop);
                checkQueryTimeout();
                checkTotalBytesLimit(response.getContent().readableBytes());
                log.debug("Initial response from url[%s] for queryId[%s]", url, query.getId());
                responseStartTimeNs = System.nanoTime();
                acquireResponseMetrics().reportNodeTimeToFirstByte(responseStartTimeNs - requestStartTimeNs).emit(emitter);
                final boolean continueReading;
                try {
                    log.trace("Got a response from [%s] for query ID[%s], subquery ID[%s]", url, query.getId(), query.getSubQueryId());
                    final String responseContext = response.headers().get(QueryResource.HEADER_RESPONSE_CONTEXT);
                    context.addRemainingResponse(query.getMostSpecificId(), VAL_TO_REDUCE_REMAINING_RESPONSES);
                    // context may be null in case of error or query timeout
                    if (responseContext != null) {
                        context.merge(ResponseContext.deserialize(responseContext, objectMapper));
                    }
                    continueReading = enqueue(response.getContent(), 0L);
                } catch (final IOException e) {
                    log.error(e, "Error parsing response context from url [%s]", url);
                    return ClientResponse.finished(new InputStream() {

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

                    @Override
                    public boolean hasMoreElements() {
                        if (fail.get() != null) {
                            throw new RE(fail.get());
                        }
                        checkQueryTimeout();
                        // Then the stream should be spouting good InputStreams.
                        synchronized (done) {
                            return !done.get() || !queue.isEmpty();
                        }
                    }

                    @Override
                    public InputStream nextElement() {
                        if (fail.get() != null) {
                            throw new RE(fail.get());
                        }
                        try {
                            return dequeue();
                        } catch (InterruptedException e) {
                            Thread.currentThread().interrupt();
                            throw new RuntimeException(e);
                        }
                    }
                }), continueReading);
            }

            @Override
            public ClientResponse<InputStream> handleChunk(ClientResponse<InputStream> clientResponse, HttpChunk chunk, long chunkNum) {
                checkQueryTimeout();
                final ChannelBuffer channelBuffer = chunk.getContent();
                final int bytes = channelBuffer.readableBytes();
                checkTotalBytesLimit(bytes);
                boolean continueReading = true;
                if (bytes > 0) {
                    try {
                        continueReading = enqueue(channelBuffer, chunkNum);
                    } catch (InterruptedException e) {
                        log.error(e, "Unable to put finalizing input stream into Sequence queue for url [%s]", url);
                        Thread.currentThread().interrupt();
                        throw new RuntimeException(e);
                    }
                    totalByteCount.addAndGet(bytes);
                }
                return ClientResponse.finished(clientResponse.getObj(), continueReading);
            }

            @Override
            public ClientResponse<InputStream> done(ClientResponse<InputStream> clientResponse) {
                long stopTimeNs = System.nanoTime();
                long nodeTimeNs = stopTimeNs - requestStartTimeNs;
                final long nodeTimeMs = TimeUnit.NANOSECONDS.toMillis(nodeTimeNs);
                log.debug("Completed queryId[%s] request to url[%s] with %,d bytes returned in %,d millis [%,f b/s].", query.getId(), url, totalByteCount.get(), nodeTimeMs, // Floating math; division by zero will yield Inf, not exception
                totalByteCount.get() / (0.001 * nodeTimeMs));
                QueryMetrics<? super Query<T>> responseMetrics = acquireResponseMetrics();
                responseMetrics.reportNodeTime(nodeTimeNs);
                responseMetrics.reportNodeBytes(totalByteCount.get());
                if (usingBackpressure) {
                    responseMetrics.reportBackPressureTime(channelSuspendedTime.get());
                }
                responseMetrics.emit(emitter);
                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(InputStreamHolder.fromChannelBuffer(ChannelBuffers.EMPTY_BUFFER, Long.MAX_VALUE));
                    } catch (InterruptedException e) {
                        log.error(e, "Unable to put finalizing input stream into Sequence queue for url [%s]", url);
                        Thread.currentThread().interrupt();
                        throw new RuntimeException(e);
                    } finally {
                        done.set(true);
                    }
                }
                return ClientResponse.finished(clientResponse.getObj());
            }

            @Override
            public void exceptionCaught(final ClientResponse<InputStream> clientResponse, final Throwable e) {
                String msg = StringUtils.format("Query[%s] url[%s] failed with exception msg [%s]", query.getId(), url, e.getMessage());
                setupResponseReadFailure(msg, e);
            }

            private void setupResponseReadFailure(String msg, Throwable th) {
                fail.set(msg);
                queue.clear();
                queue.offer(InputStreamHolder.fromStream(new InputStream() {

                    @Override
                    public int read() throws IOException {
                        if (th != null) {
                            throw new IOException(msg, th);
                        } else {
                            throw new IOException(msg);
                        }
                    }
                }, -1, 0));
            }

            // Returns remaining timeout or throws exception if timeout already elapsed.
            private long checkQueryTimeout() {
                long timeLeft = timeoutAt - System.currentTimeMillis();
                if (timeLeft <= 0) {
                    String msg = StringUtils.format("Query[%s] url[%s] timed out.", query.getId(), url);
                    setupResponseReadFailure(msg, null);
                    throw new QueryTimeoutException(msg);
                } else {
                    return timeLeft;
                }
            }

            private void checkTotalBytesLimit(long bytes) {
                if (maxScatterGatherBytes < Long.MAX_VALUE && totalBytesGathered.addAndGet(bytes) > maxScatterGatherBytes) {
                    String msg = StringUtils.format("Query[%s] url[%s] max scatter-gather bytes limit reached.", query.getId(), url);
                    setupResponseReadFailure(msg, null);
                    throw new ResourceLimitExceededException(msg);
                }
            }
        };
        long timeLeft = timeoutAt - System.currentTimeMillis();
        if (timeLeft <= 0) {
            throw new QueryTimeoutException(StringUtils.nonStrictFormat("Query[%s] url[%s] timed out.", query.getId(), url));
        }
        future = httpClient.go(new Request(HttpMethod.POST, new URL(url)).setContent(objectMapper.writeValueAsBytes(QueryContexts.withTimeout(query, timeLeft))).setHeader(HttpHeaders.Names.CONTENT_TYPE, isSmile ? SmileMediaTypes.APPLICATION_JACKSON_SMILE : MediaType.APPLICATION_JSON), responseHandler, Duration.millis(timeLeft));
        queryWatcher.registerQueryFuture(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()) {
                    cancelQuery(query, cancelUrl);
                }
            }
        }, // The callback is non-blocking and quick, so it's OK to schedule it using directExecutor()
        Execs.directExecutor());
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    Sequence<T> retVal = new BaseSequence<>(new BaseSequence.IteratorMaker<T, JsonParserIterator<T>>() {

        @Override
        public JsonParserIterator<T> make() {
            return new JsonParserIterator<T>(queryResultType, future, url, query, host, toolChest.decorateObjectMapper(objectMapper, query));
        }

        @Override
        public void cleanup(JsonParserIterator<T> iterFromMake) {
            CloseableUtils.closeAndWrapExceptions(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 42 with SequenceInputStream

use of java.io.SequenceInputStream in project jackrabbit by apache.

the class TestCaseBase method doTest.

/**
 * Assert randomly read stream from record.
 */
void doTest(DataStore ds, int offset) throws Exception {
    ArrayList<DataRecord> list = new ArrayList<DataRecord>();
    HashMap<DataRecord, Integer> map = new HashMap<DataRecord, Integer>();
    for (int i = 0; i < 10; i++) {
        int size = 100000 - (i * 100);
        RandomInputStream in = new RandomInputStream(size + offset, size);
        DataRecord rec = ds.addRecord(in);
        list.add(rec);
        map.put(rec, new Integer(size));
    }
    Random random = new Random(1);
    for (int i = 0; i < list.size(); i++) {
        int pos = random.nextInt(list.size());
        DataRecord rec = list.get(pos);
        int size = map.get(rec);
        rec = ds.getRecord(rec.getIdentifier());
        assertEquals(size, rec.getLength());
        RandomInputStream expected = new RandomInputStream(size + offset, size);
        InputStream in = rec.getStream();
        // Workaround for race condition that can happen with low cache size relative to the test
        // read immediately
        byte[] buffer = new byte[1];
        in.read(buffer);
        in = new SequenceInputStream(new ByteArrayInputStream(buffer), in);
        if (random.nextBoolean()) {
            in = readInputStreamRandomly(in, random);
        }
        assertEquals(expected, in);
    }
}

Example 43 with SequenceInputStream

use of java.io.SequenceInputStream in project hazelcast by hazelcast.

the class Config method loadFromStream.

/**
 * Creates a Config from the provided stream (XML or YAML content).
 *
 * @param source the XML or YAML stream
 * @param properties properties to use for variable resolution
 * @return Config created from the stream
 */
public static Config loadFromStream(InputStream source, Properties properties) {
    isNotNull(source, "(InputStream) source");
    try {
        ConfigStream cfgStream = new ConfigStream(source);
        if (new MemberXmlConfigRootTagRecognizer().isRecognized(cfgStream)) {
            cfgStream.reset();
            InputStream stream = new SequenceInputStream(cfgStream, source);
            return applyEnvAndSystemVariableOverrides(new XmlConfigBuilder(stream).setProperties(properties).build());
        }
        cfgStream.reset();
        if (new MemberYamlConfigRootTagRecognizer().isRecognized(cfgStream)) {
            cfgStream.reset();
            InputStream stream = new SequenceInputStream(cfgStream, source);
            return applyEnvAndSystemVariableOverrides(new YamlConfigBuilder(stream).setProperties(properties).build());
        }
    } catch (Exception e) {
        throw ExceptionUtil.rethrow(e);
    }
    throw new IllegalArgumentException("interpretation error: the resource is neither valid XML nor valid YAML");
}

Example 44 with SequenceInputStream

use of java.io.SequenceInputStream in project applause by applause.

the class ByteArrayOutputStream method toBufferedInputStream.

/**
 * Gets the current contents of this byte stream as a Input Stream. The
 * returned stream is backed by buffers of <code>this</code> stream,
 * avoiding memory allocation and copy, thus saving space and time.<br>
 *
 * @return the current contents of this output stream.
 * @see java.io.ByteArrayOutputStream#toByteArray()
 * @see #reset()
 * @since Commons IO 2.0
 */
private InputStream toBufferedInputStream() {
    int remaining = count;
    if (remaining == 0) {
        return new ClosedInputStream();
    }
    List<ByteArrayInputStream> list = new ArrayList<ByteArrayInputStream>(buffers.size());
    for (byte[] buf : buffers) {
        int c = Math.min(buf.length, remaining);
        list.add(new ByteArrayInputStream(buf, 0, c));
        remaining -= c;
        if (remaining == 0) {
            break;
        }
    }
    return new SequenceInputStream(Collections.enumeration(list));
}

Example 45 with SequenceInputStream

use of java.io.SequenceInputStream in project zm-mailbox by Zimbra.

the class BufferStream method getInputStream.

public InputStream getInputStream() throws IOException {
    sync();
    if (size > maxSize)
        throw new EOFException("data exceeds copy capacity");
    if (buf == null)
        return file == null ? new ByteArrayInputStream(new byte[0]) : new FileInputStream(file);
    InputStream in = new ByteArrayInputStream(buf, 0, (int) Math.min(buf.length, size));
    return file == null ? in : new SequenceInputStream(in, new FileInputStream(file));
}