Example usage for java.nio.channels Channels newInputStream

List of usage examples for java.nio.channels Channels newInputStream

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Introduction

In this page you can find the example usage for java.nio.channels Channels newInputStream.

Prototype

public static InputStream newInputStream(AsynchronousByteChannel ch)

Source Link

Document

Constructs a stream that reads bytes from the given channel.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    // Create a read/writeable file channel
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

    InputStream is = Channels.newInputStream(channel);

    // Close the channel
    is.close();//from   w  w  w. jav a  2 s . com
}

From source file:Test.java

private static void serverStart() {
    try {/*from   ww w  .  j  a  v  a2 s .  c o  m*/
        InetSocketAddress hostAddress = new InetSocketAddress(InetAddress.getByName("127.0.0.1"), 2583);
        AsynchronousServerSocketChannel serverSocketChannel = AsynchronousServerSocketChannel.open()
                .bind(hostAddress);
        Future<AsynchronousSocketChannel> serverFuture = serverSocketChannel.accept();
        final AsynchronousSocketChannel clientSocket = serverFuture.get();
        if ((clientSocket != null) && (clientSocket.isOpen())) {
            InputStream connectionInputStream = Channels.newInputStream(clientSocket);
            ObjectInputStream ois = null;
            ois = new ObjectInputStream(connectionInputStream);
            while (true) {
                Object object = ois.readObject();
                if (object.equals("EOF")) {
                    clientSocket.close();
                    break;
                }
                System.out.println("Received :" + object);
            }
            ois.close();
            connectionInputStream.close();
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static Document loadDocument(ReadableByteChannel in)
        throws ParserConfigurationException, SAXException, IOException {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    Document doc;//w w w  . j  a v  a  2  s .co  m
    DocumentBuilder db;

    db = dbf.newDocumentBuilder();
    doc = db.parse(Channels.newInputStream(in));

    return doc;
}

From source file:cltestgrid.GetBlob.java

public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
    String userAgent = req.getHeader("User-Agent");
    if (userAgent != null && userAgent.contains("Baiduspider")) {
        resp.setStatus(SC_MOVED_PERMANENTLY);
        resp.setHeader("Location", "http://www.baidu.com/search/spider.html");
        resp.setHeader("X-READ-ME",
                "Please honor robots.txt and don't waste our resources. http://cl-test-grid.appspot.com/robots.txt");
        return;/*from   ww w. j a v a 2 s .co  m*/
    }

    final String key = req.getParameter("key");
    String filename = "/gs/cl-test-grid-logs/" + key;
    AppEngineFile file = new AppEngineFile(filename);
    FileReadChannel readChannel = null;
    InputStream inputStream = null;
    try {
        final boolean lock = false;
        readChannel = FileServiceFactory.getFileService().openReadChannel(file, lock);
        inputStream = Channels.newInputStream(readChannel);
        resp.setContentType("text/plain");
        // The log files are gzipped, but we can't serve gzipped content,
        // because GAE gzips servlet output itlself and so logs would end-up gzipped twice.
        // Therefore we need to ungzip the log.
        InputStream ungzipper = new GZIPInputStream(new BufferedInputStream(inputStream, 100 * 1024));
        IOUtils.copy(ungzipper, resp.getOutputStream());
        resp.getOutputStream().flush();
    } finally {
        IOUtils.closeQuietly(inputStream);
        IOUtils.closeQuietly(readChannel);
    }
}

From source file:cltestgrid.GetBlob2.java

public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
    String userAgent = req.getHeader("User-Agent");
    if (userAgent != null && userAgent.contains("Baiduspider")) {
        resp.setStatus(SC_MOVED_PERMANENTLY);
        resp.setHeader("Location", "http://www.baidu.com/search/spider.html");
        resp.setHeader("X-READ-ME",
                "Please honor robots.txt and don't waste our resources. http://cl-test-grid.appspot.com/robots.txt");
        return;//from w  ww. j  a  v a2 s.c om
    }

    final String key = req.getParameter("key");
    GcsFilename filename = new GcsFilename("cl-test-grid-logs", key);
    GcsInputChannel readChannel = null;
    InputStream inputStream = null;
    try {
        final boolean lock = false;
        //readChannel = FileServiceFactory.getFileService().openReadChannel(file, lock);
        readChannel = GcsServiceFactory.createGcsService().openReadChannel(filename, 0);
        inputStream = Channels.newInputStream(readChannel);
        resp.setContentType("text/plain");
        // The log files are gzipped, but the Cloud Storage Client Library ungzips them automatically.
        // After we return this data, GAE gzips our output in case client accepts 'gzip' contect encoding.
        IOUtils.copy(new BufferedInputStream(inputStream, 100 * 1024), resp.getOutputStream());
        resp.getOutputStream().flush();
    } finally {
        IOUtils.closeQuietly(inputStream);
        IOUtils.closeQuietly(readChannel);
    }
}

From source file:org.swiftexplorer.swift.instructions.FastSegmentationPlanFile.java

@Override
protected InputStream createSegment() throws IOException {
    InputStream res = new BoundedInputStream(
            Channels.newInputStream(
                    this.randomAccessFile.getChannel().position(currentSegment * segmentationSize)),
            segmentationSize);/* w  w w  .  j a v a2  s  .c o m*/
    ((BoundedInputStream) res).setPropagateClose(false);
    return res;
}

From source file:org.hawkular.metrics.api.undertow.MetricsHandlers.java

public void setup(RoutingHandler commonHandler) {

    commonHandler.add(Methods.POST, "/{tenantId}/metrics/numeric", new AsyncHttpHandler() {

        public void handleRequestAsync(HttpServerExchange exchange) throws Exception {
            @SuppressWarnings("unchecked")
            Map<String, Object> body = mapper.readValue(Channels.newInputStream(exchange.getRequestChannel()),
                    Map.class);
            Map<String, Deque<String>> queryParams = exchange.getQueryParameters();

            String tenantId = queryParams.get("tenantId").getFirst();
            String name = body.get("name").toString();
            Integer dataRetention = Integer.parseInt(body.get("dataRetention").toString());

            NumericMetric metric = new NumericMetric(tenantId, new MetricId(name), null, dataRetention);
            ListenableFuture<Void> future = metricsService.createMetric(metric);
            Futures.addCallback(future, new FutureCallback<Void>() {
                @Override/*from  ww  w .j  a v  a  2s. c o  m*/
                public void onSuccess(Void result) {
                    exchange.setResponseCode(200);
                }

                @Override
                public void onFailure(Throwable t) {
                    exchange.setResponseCode(501);
                }
            });
        }
    });

    commonHandler.add(Methods.POST, "/{tenantId}/metrics/numeric/data", new AsyncHttpHandler() {
        public void handleRequestAsync(HttpServerExchange exchange) throws Exception {
            List<NumericMetric> metrics = mapper.readValue(
                    Channels.newInputStream(exchange.getRequestChannel()),
                    new TypeReference<List<NumericMetric>>() {
                    });
            Map<String, Deque<String>> queryParams = exchange.getQueryParameters();
            String tenantId = queryParams.get("tenantId").getFirst();

            if (metrics == null || metrics.size() == 0) {
                exchange.setResponseCode(200);
                return;
            }

            for (NumericMetric metric : metrics) {
                metric.setTenantId(tenantId);
            }

            ListenableFuture<Void> future = metricsService.addNumericData(metrics);
            Futures.addCallback(future, new FutureCallback<Void>() {
                @Override
                public void onSuccess(Void result) {
                    exchange.setResponseCode(200);
                }

                @Override
                public void onFailure(Throwable t) {
                    exchange.setResponseCode(501);
                }
            });
        }
    });
}

From source file:org.cryptomator.filesystem.crypto.Masterkeys.java

private static void readMasterKey(File file, Cryptor cryptor, CharSequence passphrase)
        throws UncheckedIOException, InvalidPassphraseException {
    try ( //
            ReadableByteChannel channel = file.openReadable(); //
            InputStream in = Channels.newInputStream(channel)) {
        final byte[] fileContents = IOUtils.toByteArray(in);
        cryptor.readKeysFromMasterkeyFile(fileContents, passphrase);
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }/*from w ww.j av a2  s.  co m*/
}

From source file:org.cryptomator.frontend.webdav.jackrabbitservlet.DavFileWithRange.java

@Override
public void spool(OutputContext outputContext) throws IOException {
    outputContext.setModificationTime(node.lastModified().toEpochMilli());
    if (!outputContext.hasStream()) {
        return;/*from www  . j a  v  a 2  s.c  om*/
    }
    final long contentLength = node.size();
    final Pair<Long, Long> range = getEffectiveRange(contentLength);
    if (range.getLeft() < 0 || range.getLeft() > range.getRight() || range.getRight() > contentLength) {
        outputContext.setProperty(HttpHeader.CONTENT_RANGE.asString(), "bytes */" + contentLength);
        throw new UncheckedDavException(DavServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE,
                "Valid Range would be in [0, " + contentLength + "]");
    }
    final Long rangeLength = range.getRight() - range.getLeft() + 1;
    outputContext.setContentLength(rangeLength);
    outputContext.setProperty(HttpHeader.CONTENT_RANGE.asString(),
            contentRangeResponseHeader(range.getLeft(), range.getRight(), contentLength));
    outputContext.setContentType(CONTENT_TYPE_VALUE);
    outputContext.setProperty(CONTENT_DISPOSITION_HEADER, CONTENT_DISPOSITION_VALUE);
    outputContext.setProperty(X_CONTENT_TYPE_OPTIONS_HEADER, X_CONTENT_TYPE_OPTIONS_VALUE);
    try (ReadableFile src = node.openReadable(); OutputStream out = outputContext.getOutputStream()) {
        src.position(range.getLeft());
        InputStream limitedIn = ByteStreams.limit(Channels.newInputStream(src), rangeLength);
        ByteStreams.copy(limitedIn, out);
    }
}

From source file:fr.gael.dhus.util.stream.ProductDownloadStreamFactory.java

@Override
public synchronized InputStream generateInputStream(ProductInfo productInfo, Source source,
        SynchronizerRules rules, long skip) {
    // generate HTTP client
    int timeout = rules.getTimeout().intValue();
    InterruptibleHttpClient client = new InterruptibleHttpClient(
            new BasicAuthHttpClientProducer(source.getUsername(), source.getPassword(), timeout));

    // generate download url
    String url = productInfo.getDownloadUrl(source.getUrl());

    // generate stream
    boolean canResume;
    String etag;/*from   w ww  .j a v a 2  s  .  co m*/
    HttpResponse headers;
    Thread downloadThread = null;
    try {
        headers = client.interruptibleHead(url);
        // check availability of content
        if (headers.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
            return null;
        }
        // retrieve content information
        if (headers.containsHeader(HTTP_HEADER_ETAG)) {
            etag = headers.getFirstHeader(HTTP_HEADER_ETAG).getValue();
            canResume = headers.containsHeader(HTTP_HEADER_ACCEPT_RANGE);
        } else {
            etag = null;
            canResume = false;
        }

        Pipe pipe = Pipe.open();
        DownloadTask downloadTask = new DownloadTask(pipe, client, url, etag, skip, productInfo.getSize(),
                rules.getAttempts(), canResume);
        downloadThread = new Thread(downloadTask, THREAD_NAME);
        downloadThread.start();

        return Channels.newInputStream(pipe.source());
    } catch (InterruptedException | IOException e) {
        if (downloadThread != null) {
            downloadThread.interrupt();
        }
        return null;
    }
}