Example usage for java.io DataOutputStream writeByte

Introduction

In this page you can find the example usage for java.io DataOutputStream writeByte.

Prototype

public final void writeByte(int v) throws IOException 

Source Link

Document

Writes out a byte to the underlying output stream as a 1-byte value.

Usage

From source file:com.codefollower.lealone.omid.tso.TSOHandler.java

private void handleHalfAbort(long startTimestamp) {
    abortCounter.incrementAndGet();/*from   ww  w . j av a 2s . c o  m*/

    synchronized (sharedState) {
        DataOutputStream toWAL = sharedState.toWAL;
        try {
            toWAL.writeByte(LoggerProtocol.ABORT);
            toWAL.writeLong(startTimestamp);
        } catch (IOException e) {
            LOG.error("failed to write abort wal", e);
        }
        sharedState.processHalfAbort(startTimestamp);
        synchronized (sharedMsgBufLock) {
            queueHalfAbort(startTimestamp);
        }
    }
}

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From source file:org.apache.hadoop.io.TestArrayOutputStream.java

private void runComparison(ArrayOutputStream aos, DataOutputStream dos, ByteArrayOutputStream bos)
        throws IOException {
    Random r = new Random();
    // byte// w w w .  j  a  va  2 s . c  o m
    int b = r.nextInt(128);
    aos.write(b);
    dos.write(b);

    // byte[]
    byte[] bytes = new byte[10];
    r.nextBytes(bytes);
    aos.write(bytes, 0, 10);
    dos.write(bytes, 0, 10);

    // Byte
    aos.writeByte(b);
    dos.writeByte(b);

    // boolean
    boolean bool = r.nextBoolean();
    aos.writeBoolean(bool);
    dos.writeBoolean(bool);

    // short
    short s = (short) r.nextInt();
    aos.writeShort(s);
    dos.writeShort(s);

    // char
    int c = r.nextInt();
    aos.writeChar(c);
    dos.writeChar(c);

    // int
    int i = r.nextInt();
    aos.writeInt(i);
    dos.writeInt(i);

    // long
    long l = r.nextLong();
    aos.writeLong(l);
    dos.writeLong(l);

    // float
    float f = r.nextFloat();
    aos.writeFloat(f);
    dos.writeFloat(f);

    // double
    double d = r.nextDouble();
    aos.writeDouble(d);
    dos.writeDouble(d);

    // strings
    String str = RandomStringUtils.random(20);
    aos.writeBytes(str);
    aos.writeChars(str);
    aos.writeUTF(str);
    dos.writeBytes(str);
    dos.writeChars(str);
    dos.writeUTF(str);

    byte[] expected = bos.toByteArray();
    assertEquals(expected.length, aos.size());

    byte[] actual = new byte[aos.size()];
    System.arraycopy(aos.getBytes(), 0, actual, 0, actual.length);
    // serialized bytes should be the same
    assertTrue(Arrays.equals(expected, actual));
}

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From source file:org.openxdata.server.service.impl.FormDownloadServiceImpl.java

@Override
public void submitForms(InputStream is, OutputStream os, String serializerName) {
    //When submitting data, we need all the form versions and not just the default ones
    //because the user can change the default form version which already has data on
    //mobile devices. So getting all versions shields us from such problems.
    List<FormData> formDataList = new ArrayList<FormData>();
    User user = userService.getLoggedInUser();
    XformSerializer formSerializer = serializationService.getFormSerializer(serializerName);
    Map<Integer, String> formsVersionXmlMap = getFormsVersionXmlMap();
    List<String> xforms = (List<String>) formSerializer.deSerialize(is, formsVersionXmlMap);
    if (xforms == null || xforms.size() == 0) {
        throw new UnexpectedException("Problem encountered while deserializing data.");
    }//from w  w  w . j av a  2s  .c  o  m
    try {
        DocumentBuilder db = dbf.newDocumentBuilder();
        for (String xml : xforms) {
            Document doc = db.parse(IOUtils.toInputStream(xml, "UTF-8"));
            Integer formId = Integer
                    .valueOf(doc.getDocumentElement().getAttribute(OpenXDataConstants.ATTRIBUTE_NAME_FORMID));
            String descTemplate = doc.getDocumentElement()
                    .getAttribute(OpenXDataConstants.ATTRIBUTE_NAME_DESCRIPTION_TEMPLATE);
            FormData formData = saveFormData(formId, xml,
                    XmlUtil.getDescriptionTemplate(doc.getDocumentElement(), descTemplate), user, new Date());
            formDataList.add(formData);
        }
        // serialize the summaries
        DataOutputStream dos = new DataOutputStream(os);
        dos.writeByte(formDataList.size());
        for (FormData fd : formDataList) {
            String description = fd.getDescription();
            if (description != null) {
                dos.writeUTF(description);
            } else {
                dos.writeUTF("form {" + fd.getFormDefVersionId() + "}"); // description can be null
            }
            dos.writeInt(fd.getFormDataId());
        }
    } catch (ParserConfigurationException ex) {
        throw new UnexpectedException(ex);
    } catch (SAXException ex) {
        throw new UnexpectedException(ex);
    } catch (IOException ex) {
        throw new UnexpectedException(ex);
    }
}

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From source file:com.yahoo.omid.tso.TSOHandler.java

public void handle(AbortRequest msg, ChannelHandlerContext ctx) {
    synchronized (sharedState) {
        DataOutputStream toWAL = sharedState.toWAL;
        try {/* ww w . ja va  2  s .c  o m*/
            toWAL.writeByte(LoggerProtocol.ABORT);
            toWAL.writeLong(msg.startTimestamp);
        } catch (IOException e) {
            e.printStackTrace();
        }
        abortCount++;
        sharedState.processAbort(msg.startTimestamp);
        synchronized (sharedMsgBufLock) {
            queueHalfAbort(msg.startTimestamp);
        }
    }
}

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From source file:com.yahoo.omid.tso.TSOHandler.java

/**
 * Handle the FullAbortReport message//from   ww  w. j  a  v  a2  s  .  c  o  m
 */
public void handle(FullAbortRequest msg, ChannelHandlerContext ctx) {
    synchronized (sharedState) {
        DataOutputStream toWAL = sharedState.toWAL;
        try {
            toWAL.writeByte(LoggerProtocol.FULLABORT);
            toWAL.writeLong(msg.startTimestamp);
        } catch (IOException e) {
            e.printStackTrace();
        }
        sharedState.processFullAbort(msg.startTimestamp);
    }
    synchronized (sharedMsgBufLock) {
        queueFullAbort(msg.startTimestamp);
    }
}

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From source file:com.chaosinmotion.securechat.server.messages.NotificationSocket.java

/**
 * Internal method for sending a message to the specified device. This
 * encodes the message as a binary array and transmits it as a single 
 * packet to the listening device. This allows users to receive messages
 * during chat as soon as we are able to, for (more or less) just in time
 * messaging./* w  w w .jav  a2s  .c  o  m*/
 * 
 * The packet returned here is similar to the packet returned by the
 * getmessages api, except we serialize as binary.
 * 
 * @param messageid
 * @param senderid
 * @param sendername
 * @param ts
 * @param message
 * @throws IOException 
 */
void sendMessage(int messageid, int senderid, String sendername, boolean toflag, Timestamp ts, byte[] message)
        throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(baos);

    /*
     * Encode. First byte is 0x20
     */

    String date;
    synchronized (format) {
        date = format.format(ts);
    }

    /*
     * Formulate packet in expected format
     */
    dos.writeByte(0x20); // marker
    dos.writeBoolean(toflag);
    dos.writeInt(messageid);
    dos.writeInt(senderid);
    dos.writeUTF(date);
    dos.writeUTF(sendername);
    dos.writeInt(message.length);
    dos.write(message);

    /*
     * Flush and write packet to device. Our protocol does not depend on
     * the device actually receiving this message, as we wait until the
     * device deletes the messages by a separate command.
     */
    dos.flush();
    out.writeData(baos.toByteArray());
}

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From source file:com.codefollower.lealone.omid.tso.TSOHandler.java

private void createAbortedSnapshot() {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream toWAL = new DataOutputStream(baos);

    long snapshot = sharedState.hashmap.getAndIncrementAbortedSnapshot();

    try {//from  w w w  . j  a  v a 2  s.co  m
        toWAL.writeByte(LoggerProtocol.SNAPSHOT);
        toWAL.writeLong(snapshot);
        for (AbortedTransaction aborted : sharedState.hashmap.halfAborted) {
            // ignore aborted transactions from last snapshot
            if (aborted.getSnapshot() < snapshot) {
                toWAL.writeByte(LoggerProtocol.ABORT);
                toWAL.writeLong(aborted.getStartTimestamp());
            }
        }
    } catch (IOException e) {
        // can't happen
        throw new RuntimeException(e);
    }

    sharedState.addRecord(baos.toByteArray(), noCallback, null);
}

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From source file:org.nuxeo.ecm.core.blob.binary.AESBinaryManager.java

/**
 * Encrypts the given input stream into the given output stream, while also computing the digest of the input
 * stream.// ww  w.  j a va  2  s  . com
 * <p>
 * File format version 1 (values are in network order):
 * <ul>
 * <li>10 bytes: magic number "NUXEOCRYPT"
 * <li>1 byte: file format version = 1
 * <li>1 byte: use keystore = 1, use PBKDF2 = 2
 * <li>if use PBKDF2:
 * <ul>
 * <li>4 bytes: salt length = n
 * <li>n bytes: salt data
 * </ul>
 * <li>4 bytes: IV length = p
 * <li>p bytes: IV data
 * <li>x bytes: encrypted stream
 * </ul>
 *
 * @param in the input stream containing the data
 * @param file the file containing the encrypted data
 * @return the digest of the input stream
 */
@Override
public String storeAndDigest(InputStream in, OutputStream out) throws IOException {
    out.write(FILE_MAGIC);
    DataOutputStream data = new DataOutputStream(out);
    data.writeByte(FILE_VERSION_1);

    try {
        // get digest to use
        MessageDigest messageDigest = MessageDigest.getInstance(digestAlgorithm);

        // secret key
        Key secret;
        if (usePBKDF2) {
            data.writeByte(USE_PBKDF2);
            // generate a salt
            byte[] salt = new byte[16];
            RANDOM.nextBytes(salt);
            // generate secret key
            secret = generateSecretKey(salt);
            // write salt
            data.writeInt(salt.length);
            data.write(salt);
        } else {
            data.writeByte(USE_KEYSTORE);
            // find secret key from keystore
            secret = getSecretKey();
        }

        // cipher
        Cipher cipher = Cipher.getInstance(AES_CBC_PKCS5_PADDING);
        cipher.init(Cipher.ENCRYPT_MODE, secret);

        // write IV
        byte[] iv = cipher.getIV();
        data.writeInt(iv.length);
        data.write(iv);

        // digest and write the encrypted data
        CipherAndDigestOutputStream cipherOut = new CipherAndDigestOutputStream(out, cipher, messageDigest);
        IOUtils.copy(in, cipherOut);
        cipherOut.close();
        byte[] digest = cipherOut.getDigest();
        return toHexString(digest);
    } catch (GeneralSecurityException e) {
        throw new NuxeoException(e);
    }

}

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From source file:org.openxdata.server.service.impl.FormDownloadServiceImpl.java

@Override
public void downloadLocales(InputStream is, OutputStream os, String serializerName) throws IOException {
    DataOutputStream dos = new DataOutputStream(os);

    List<Locale> locales = localeService.getLocales();
    if (locales == null || locales.size() == 0)
        dos.writeByte(0);
    else {/*from  w ww .  j a v  a  2s . co m*/
        dos.writeByte(locales.size());
        for (Locale locale : locales) {
            dos.writeUTF(locale.getKey());
            dos.writeUTF(locale.getName());
        }
    }
}

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From source file:com.yahoo.omid.tso.TSOHandler.java

public void createAbortedSnapshot() {

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream toWAL = new DataOutputStream(baos);

    long snapshot = sharedState.hashmap.getAndIncrementAbortedSnapshot();

    try {//from  w  w w.j a  va 2 s . co  m
        toWAL.writeByte(LoggerProtocol.SNAPSHOT);
        toWAL.writeLong(snapshot);
        for (AbortedTransaction aborted : sharedState.hashmap.halfAborted) {
            // ignore aborted transactions from last snapshot
            if (aborted.getSnapshot() < snapshot) {
                toWAL.writeByte(LoggerProtocol.ABORT);
                toWAL.writeLong(aborted.getStartTimestamp());
            }
        }
    } catch (IOException e) {
        // can't happen
        throw new RuntimeException(e);
    }

    sharedState.addRecord(baos.toByteArray(), noCallback, null);
}

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