Example usage for java.io DataOutputStream writeLong

Introduction

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

Prototype

public final void writeLong(long v) throws IOException

Source Link

Document

Writes a long to the underlying output stream as eight bytes, high byte first.

Usage

From source file:org.apache.hadoop.hdfs.server.namenode.FSImageSerialization.java

static void writeINodeUnderConstruction(DataOutputStream out, INodeFileUnderConstruction cons, String path)
        throws IOException {
    writeString(path, out);/*from   w ww. ja v a  2 s . c  o m*/
    out.writeLong(cons.getId());
    out.writeShort(cons.getFileReplication());
    out.writeLong(cons.getModificationTime());
    out.writeLong(cons.getPreferredBlockSize());

    writeBlocks(cons.getBlocks(), out);
    cons.getPermissionStatus().write(out);

    writeString(cons.getClientName(), out);
    writeString(cons.getClientMachine(), out);

    out.writeInt(0); //  do not store locations of last block
}

From source file:org.nuras.mcpha.Client.java

/**
 * Send command to device//from  ww w  .j  a va  2 s.  c  om
 * 
 * @param code
 * @param chan
 * @param data 
 */
private static void sendCommand(long code, long chan, long data) throws IOException {
    logDebugMessage("sendCommand - code=" + code + ", chan=" + chan + ", data=" + data);

    DataOutputStream out = new DataOutputStream(deviceSocket.getOutputStream());
    long b = (long) (code << SHIFT_CODE) | (validateChannel(chan) << SHIFT_CHAN) | data;
    out.writeLong(Long.reverseBytes(b));
}

From source file:Main.java

public static void writeSettings(String file, Object... objs) throws IOException {
    DataOutputStream out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file), 1024));
    try {/* w w  w.j av a  2  s.c  o  m*/
        out.writeInt(objs.length);
        for (Object obj : objs) {
            char cl;
            if (obj instanceof Byte) {
                cl = 'Y';
            } else {
                cl = obj.getClass().getSimpleName().charAt(0);
            }

            out.writeChar(cl);
            if (obj instanceof String) {
                out.writeUTF((String) obj);
            } else if (obj instanceof Float) {
                out.writeFloat((Float) obj);
            } else if (obj instanceof Double) {
                out.writeDouble((Double) obj);
            } else if (obj instanceof Integer) {
                out.writeInt((Integer) obj);
            } else if (obj instanceof Long) {
                out.writeLong((Long) obj);
            } else if (obj instanceof Boolean) {
                out.writeBoolean((Boolean) obj);
            } else {
                throw new IllegalStateException("Unsupported type");
            }
        }
    } finally {
        out.close();
    }
}

From source file:org.apache.hadoop.hdfs.server.namenode.FSImageSerialization.java

/**
 * Write an array of blocks as compactly as possible. This uses
 * delta-encoding for the generation stamp and size, following
 * the principle that genstamp increases relatively slowly,
 * and size is equal for all but the last block of a file.
 *//*from www. ja  v  a 2s . c  om*/
public static void writeCompactBlockArray(Block[] blocks, DataOutputStream out) throws IOException {
    WritableUtils.writeVInt(out, blocks.length);
    Block prev = null;
    for (Block b : blocks) {
        long szDelta = b.getNumBytes() - (prev != null ? prev.getNumBytes() : 0);
        long gsDelta = b.getGenerationStamp() - (prev != null ? prev.getGenerationStamp() : 0);
        out.writeLong(b.getBlockId()); // blockid is random
        WritableUtils.writeVLong(out, szDelta);
        WritableUtils.writeVLong(out, gsDelta);
        prev = b;
    }
}

From source file:edu.umn.cs.spatialHadoop.indexing.RTreeLocalIndexer.java

@Override
public void buildLocalIndex(File nonIndexedFile, Path outputIndexedFile, Shape shape)
        throws IOException, InterruptedException {
    // Read all data of the written file in memory
    byte[] cellData = new byte[(int) nonIndexedFile.length()];
    InputStream cellIn = new BufferedInputStream(new FileInputStream(nonIndexedFile));
    cellIn.read(cellData);/*from  w  w w . j  a v a2s  .  c o  m*/
    cellIn.close();

    // Build an RTree over the elements read from file
    // Create the output file
    FileSystem outFS = outputIndexedFile.getFileSystem(conf);
    DataOutputStream cellStream = outFS.create(outputIndexedFile);
    cellStream.writeLong(SpatialSite.RTreeFileMarker);
    int degree = 4096 / RTree.NodeSize;
    boolean fastAlgorithm = conf.get(SpatialSite.RTREE_BUILD_MODE, "fast").equals("fast");
    RTree.bulkLoadWrite(cellData, 0, cellData.length, degree, cellStream, shape.clone(), fastAlgorithm);
    cellStream.close();
}

From source file:org.apache.geode.internal.cache.tier.sockets.MessageIdExtractorTest.java

private byte[] byteArrayFromIds(Long connectionId, Long uniqueId) throws IOException {
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    DataOutputStream dis = new DataOutputStream(byteArrayOutputStream);
    dis.writeLong(connectionId);
    dis.writeLong(uniqueId);//from w ww.  j  av a2  s .  c o m
    dis.flush();
    return byteArrayOutputStream.toByteArray();
}

From source file:com.yattatech.io.ShalomFileWriter.java

public boolean write(Seminary seminary) {
    final String path = seminary.getFilePath();
    final String json = new Gson().toJson(seminary);
    boolean sucess = true;
    DataOutputStream out = null;
    try {/*from w  ww . java  2s. c  o  m*/
        out = new DataOutputStream(new FileOutputStream(path));
        out.writeLong(ChecksumCalculator.calculateChecksum(json));
        out.writeUTF("\n");
        out.writeUTF(json);
    } catch (IOException ioe) {
        LOGGER.log(Level.SEVERE, ioe.getMessage());
        sucess = false;
    } finally {
        IOUtils.closeQuietly(out);
        return sucess;
    }
}

From source file:mitm.common.security.crypto.PBEncryptedStreamParameters.java

/**
 * Returns the encoded form of PBEncryptionParameters.
 *///from   w w  w  . j  av  a2s  .  c  o  m
public byte[] getEncoded() throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    DataOutputStream out = new DataOutputStream(bos);

    out.writeLong(serialVersionUID);

    out.writeUTF(algorithm);
    out.writeInt(salt.length);
    out.write(salt);

    out.writeInt(iterationCount);

    return bos.toByteArray();
}

From source file:mitm.common.security.password.PBEncryptionParameters.java

/**
 * Returns the encoded form of PBEncryptionParameters.
 *///ww w .  jav  a  2s.co m
public byte[] getEncoded() throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    DataOutputStream out = new DataOutputStream(bos);

    out.writeLong(serialVersionUID);

    out.writeInt(salt.length);
    out.write(salt);

    out.writeInt(iterationCount);

    out.writeInt(encryptedData.length);
    out.write(encryptedData);

    return bos.toByteArray();
}

From source file:org.axonframework.eventstore.fs.FileSystemSnapshotEventWriter.java

/**
 * Writes the given snapshotEvent to the {@link #snapshotEventFile}.
 * Prepends a long value to the event in the file indicating the bytes to skip when reading the {@link #eventFile}.
 *
 * @param snapshotEvent The snapshot to write to the {@link #snapshotEventFile}
 *///from w w w .j  a v  a2s.c o  m
public void writeSnapshotEvent(DomainEventMessage snapshotEvent) {
    try {
        long offset = calculateOffset(snapshotEvent);
        DataOutputStream dataOutputStream = new DataOutputStream(snapshotEventFile);

        dataOutputStream.writeLong(offset);
        FileSystemEventMessageWriter eventMessageWriter = new FileSystemEventMessageWriter(dataOutputStream,
                eventSerializer);
        eventMessageWriter.writeEventMessage(snapshotEvent);
    } catch (IOException e) {
        throw new EventStoreException("Error writing a snapshot event due to an IO exception", e);
    } finally {
        IOUtils.closeQuietly(snapshotEventFile);
    }
}