Example usage for java.nio.channels Channels newChannel

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

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Introduction

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

Prototype

public static WritableByteChannel newChannel(OutputStream out)

Source Link

Document

Constructs a channel that writes bytes to the given stream.

Usage

From source file:rascal.object.source.FilelBlobSourceIntegrationTest.java

@Test
public void testCopyTo() throws Exception {
    ByteArrayOutputStream output = new ByteArrayOutputStream();
    fileBlobSource.copyTo(Channels.newChannel(output));
    byte[] buffer = output.toByteArray();
    String expectedHeaderString = String.format("%s %d", GitObjectType.BLOB, testData.length);
    byte[] expectedHeader = ArrayUtils.add(expectedHeaderString.getBytes(), (byte) 0);
    byte[] header = ArrayUtils.subarray(buffer, 0, expectedHeader.length);
    Assert.assertTrue("Header should be of format \"type(space)size(null byte)\"",
            ArrayUtils.isEquals(expectedHeader, header));
    byte[] content = ArrayUtils.subarray(buffer, expectedHeader.length, buffer.length);
    Assert.assertTrue(ArrayUtils.isEquals(testData, content));
}

From source file:com.sastix.cms.server.services.cache.CacheFileUtilsServiceImpl.java

@Override
public byte[] downloadResource(URL url) throws IOException {
    //create buffer with capacity in bytes
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {/*from   w w w.  j  a  v a 2s .  c om*/
        ByteBuffer bufIn = ByteBuffer.allocate(1024);
        ReadableByteChannel rbc = Channels.newChannel(url.openStream());
        int bytesRead;
        while ((bytesRead = rbc.read(bufIn)) > 0) {
            baos.write(bufIn.array(), 0, bytesRead);
            bufIn.rewind();
        }
        bufIn.clear();
        return baos.toByteArray();
    } finally {
        baos.close();
    }
}

From source file:org.apache.nifi.jms.cf.TestUtils.java

static String setupActiveMqLibForTesting(boolean clean) {
    String[] urlsStrings = new String[] {
            "http://central.maven.org/maven2/org/apache/activemq/activemq-client/5.13.0/activemq-client-5.13.0.jar",
            "http://central.maven.org/maven2/org/apache/activemq/activemq-broker/5.13.0/activemq-broker-5.13.0.jar",
            "http://central.maven.org/maven2/org/apache/geronimo/specs/geronimo-j2ee-management_1.0_spec/1.0.1/geronimo-j2ee-management_1.0_spec-1.0.1.jar",
            "http://central.maven.org/maven2/org/fusesource/hawtbuf/hawtbuf/1.11/hawtbuf-1.11.jar" };

    try {/* w  w w  .  j av  a  2 s.co m*/
        File activeMqLib = new File("target/active-mq-lib");
        if (activeMqLib.exists() && clean) {
            FileUtils.deleteDirectory(activeMqLib);
        }
        activeMqLib.mkdirs();
        for (String urlString : urlsStrings) {
            URL url = new URL(urlString);
            String path = url.getPath();
            path = path.substring(path.lastIndexOf("/") + 1);
            logger.info("Downloading: " + path);
            ReadableByteChannel rbc = Channels.newChannel(url.openStream());
            try (FileOutputStream fos = new FileOutputStream(new File(activeMqLib, path))) {
                fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
                fos.close();
            }
        }
        return activeMqLib.getAbsolutePath();
    } catch (Exception e) {
        throw new IllegalStateException("Failed to download ActiveMQ libraries.", e);
    }
}

From source file:examples.utils.CifarReader.java

public static void downloadAndExtract() {

    if (new File("data", TEST_DATA_FILE).exists() == false) {
        try {//  ww w  . j a v  a  2 s .  c  o m
            if (new File("data", ARCHIVE_BINARY_FILE).exists() == false) {
                URL website = new URL("http://www.cs.toronto.edu/~kriz/" + ARCHIVE_BINARY_FILE);
                FileOutputStream fos = new FileOutputStream("data/" + ARCHIVE_BINARY_FILE);
                fos.getChannel().transferFrom(Channels.newChannel(website.openStream()), 0, Long.MAX_VALUE);
                fos.close();
            }
            TarArchiveInputStream tar = new TarArchiveInputStream(
                    new GZIPInputStream(new FileInputStream("data/" + ARCHIVE_BINARY_FILE)));
            TarArchiveEntry entry = null;
            while ((entry = tar.getNextTarEntry()) != null) {
                if (entry.isDirectory()) {
                    new File("data", entry.getName()).mkdirs();
                } else {
                    byte data[] = new byte[2048];
                    int count;
                    BufferedOutputStream bos = new BufferedOutputStream(
                            new FileOutputStream(new File("data/", entry.getName())), 2048);

                    while ((count = tar.read(data, 0, 2048)) != -1) {
                        bos.write(data, 0, count);
                    }
                    bos.close();
                }
            }
            tar.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

From source file:org.ops4j.pax.runner.platform.internal.StreamUtils.java

/**
 * Copy a stream to a destination. It does not close the streams.
 *
 * @param in          the stream to copy from
 * @param out         the stream to copy to
 * @param progressBar download progress feedback. Can be null.
 *
 * @throws IOException re-thrown/* ww  w  .j  a va2 s.com*/
 */
public static void streamCopy(final InputStream in, final FileChannel out, final ProgressBar progressBar)
        throws IOException {
    NullArgumentException.validateNotNull(in, "Input stream");
    NullArgumentException.validateNotNull(out, "Output stream");
    final long start = System.currentTimeMillis();
    long bytes = 0;
    ProgressBar feedbackBar = progressBar;
    if (feedbackBar == null) {
        feedbackBar = new NullProgressBar();
    }
    try {
        ReadableByteChannel inChannel = Channels.newChannel(in);
        bytes = out.transferFrom(inChannel, 0, Integer.MAX_VALUE);
        inChannel.close();
    } finally {
        feedbackBar.increment(bytes, bytes / Math.max(System.currentTimeMillis() - start, 1));
        feedbackBar.stop();
    }
}

From source file:Dengue.CDengueManager.java

private static void sendInfoToCPU(String pStrJSON, int pIntPort) {

    new Thread(() -> {
        try (Socket client = new Socket(InetAddress.getLocalHost(), pIntPort)) {

            Writer objWriter = Channels.newWriter(Channels.newChannel(client.getOutputStream()),
                    StandardCharsets.US_ASCII.name());
            objWriter.write(pStrJSON);//  w  w  w  .j ava 2  s  .  c  om
            objWriter.flush();

            client.shutdownOutput();

            try (Reader objReader = Channels.newReader(Channels.newChannel(client.getInputStream()),
                    StandardCharsets.US_ASCII.name());
                    BufferedReader objOutReader = new BufferedReader(objReader)) {
                System.out.println((char) objOutReader.read());

            }

        } catch (IOException e) {
            System.out.println(e);
        }
    }).start();
}

From source file:Network.Dengue.CDengueHandler.java

@Override
public void update(Observable o, Object arg) {

    int intReturn = 1;

    Socket objSocket = (Socket) arg;

    StringBuilder objSB = new StringBuilder();

    try {// w  ww  .j  a v  a  2s.c om

        BufferedReader objReader = new BufferedReader(new InputStreamReader(objSocket.getInputStream()));

        objSB.append(objReader.readLine());

        new MDengue().addCluster(objSB.toString());

        CNotificationManager.notifiyDengue();
        CPublisherManager.publishDengue();

    } catch (IOException | ParseException ex) {
        System.out.println(ex);
        intReturn = -1;
    } finally {

        try (Writer objWriter = Channels.newWriter(Channels.newChannel(objSocket.getOutputStream()),
                StandardCharsets.US_ASCII.name())) {

            objWriter.append(intReturn + "");

        } catch (Exception ex) {
            System.out.println(ex);
        }
    }
}

From source file:io.uploader.drive.util.FileUtils.java

public static String readAllAndgetMD5(InputStream in) throws IOException {
    com.google.common.hash.HashingInputStream his = null;
    try {//  ww  w .  j a va2 s  .  c o  m
        his = new com.google.common.hash.HashingInputStream(Hashing.md5(), in);

        final int bufferSize = 2097152;
        final ReadableByteChannel inputChannel = Channels.newChannel(his);
        final ByteBuffer buffer = ByteBuffer.allocateDirect(bufferSize);
        while (inputChannel.read(buffer) != -1) {
            buffer.clear();
        }
        /*
        byte[] bytesBuffer = new byte[bufferSize] ;
        int r = his.read(bytesBuffer, 0, bufferSize) ;
        while (r != -1)
           r = his.read(bytesBuffer) ;
        */
        HashCode hc = his.hash();
        return (hc != null) ? (hc.toString()) : (null);
    } finally {
        if (his != null)
            his.close();
    }
}

From source file:com.alibaba.otter.shared.common.utils.NioUtils.java

/**
 * ??copy//from  ww  w .  j a v  a2s  .  c o m
 */
public static long copy(InputStream input, OutputStream output, long offset) throws IOException {
    long count = 0;
    long n = 0;
    if (input instanceof FileInputStream) {
        FileChannel inChannel = ((FileInputStream) input).getChannel();
        WritableByteChannel outChannel = Channels.newChannel(output);
        count = inChannel.transferTo(offset, inChannel.size() - offset, outChannel);
    } else if (output instanceof FileOutputStream) {
        FileChannel outChannel = ((FileOutputStream) output).getChannel();
        ReadableByteChannel inChannel = Channels.newChannel(input);
        do {
            n = outChannel.transferFrom(inChannel, offset + count, DEFAULT_BUFFER_SIZE);
            count += n;
        } while (n > 0);
    } else {
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];

        input.skip(offset);
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, (int) n);
            count += n;
        }
        // ReadableByteChannel inChannel = Channels.newChannel(input);
        // WritableByteChannel outChannel = Channels.newChannel(output);
        //            
        // //ByteBuffer buffer = new ByteBuffer(DEFAULT_BUFFER_SIZE);
        // ByteBuffer buffer = ByteBuffer.allocateDirect(DEFAULT_BUFFER_SIZE);
        // while (-1 != (n = inChannel.read(buffer))) {
        // outChannel.write(buffer);
        // count += n;
        // }
    }
    return count;
}

From source file:Network.Haze.CHazeHandler.java

@Override
public void update(Observable o, Object arg) {

    int intReturn = 1;

    Socket objSocket = (Socket) arg;

    StringBuilder objSB = new StringBuilder();

    try {//  ww  w. j  a  va  2 s  .co m

        BufferedReader objReader = new BufferedReader(new InputStreamReader(objSocket.getInputStream()));

        objSB.append(objReader.readLine());

        new MHaze().addHazeInfo(objSB.toString());

        CNotificationManager.notifiyHaze();
        CPublisherManager.publishHaze();

    } catch (IOException | ParseException ex) {
        System.out.println(ex);
        intReturn = -1;
    } finally {

        try (Writer objWriter = Channels.newWriter(Channels.newChannel(objSocket.getOutputStream()),
                StandardCharsets.US_ASCII.name())) {

            objWriter.append(intReturn + "");

        } catch (Exception ex) {
            System.out.println(ex);
        }
    }
}