Example usage for java.io RandomAccessFile write

Introduction

In this page you can find the example usage for java.io RandomAccessFile write.

Prototype

public void write(byte b[]) throws IOException 

Source Link

Document

Writes b.length bytes from the specified byte array to this file, starting at the current file pointer.

Usage

From source file:org.wso2.msf4j.HttpServerTest.java

protected void testStreamUpload(int size, String filename) throws IOException {
    //create a random file to be uploaded.
    File fname = new File(tmpFolder, filename);
    fname.createNewFile();//from  w  ww. java2  s. c o  m
    RandomAccessFile randf = new RandomAccessFile(fname, "rw");
    String contentStr = IntStream.range(0, size).mapToObj(value -> String.valueOf((int) (Math.random() * 1000)))
            .collect(Collectors.joining(""));
    randf.write(contentStr.getBytes(Charsets.UTF_8));
    randf.close();

    //test stream upload
    HttpURLConnection urlConn = request("/test/v1/stream/upload", HttpMethod.PUT);
    Files.copy(Paths.get(fname.toURI()), urlConn.getOutputStream());
    assertEquals(200, urlConn.getResponseCode());
    String contentFromServer = getContent(urlConn);
    assertEquals(contentStr, contentFromServer);
    urlConn.disconnect();
    fname.delete();
}

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From source file:com.lewa.crazychapter11.MainActivity.java

private void WriteToSdCard(String content) {
    try {/*ww  w . j  ava2 s. c  o  m*/
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            File sdCardDir = Environment.getExternalStorageDirectory();
            File targetFile = new File(sdCardDir.getCanonicalPath() + FILE_NAME_SDCARD);

            Log.i("crazyFile", "WriteToSdCard: sdCardDir=" + sdCardDir + " \n targetFile=" + targetFile);
            RandomAccessFile raf = new RandomAccessFile(targetFile, "rw");
            raf.seek(targetFile.length());
            raf.write(content.getBytes());
            raf.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:org.kuali.student.git.model.SvnRevisionMapper.java

private long createRevisionEntry(RandomAccessFile dataFile, long endOfDataFileOffset, long revision,
        List<String> revisionLines) throws IOException {

    OutputStream revisionMappingStream = null;

    ByteArrayOutputStream bytesOut;

    revisionMappingStream = new BZip2CompressorOutputStream(bytesOut = new ByteArrayOutputStream());

    PrintWriter pw = new PrintWriter(revisionMappingStream);

    IOUtils.writeLines(revisionLines, "\n", pw);

    pw.flush();/*  www .  j a  v  a 2  s.c o m*/

    pw.close();

    byte[] data = bytesOut.toByteArray();

    dataFile.seek(endOfDataFileOffset);

    dataFile.write(data);

    return data.length;
}

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From source file:juicebox.tools.utils.original.Preprocessor.java

private void updateMasterIndex() throws IOException {
    RandomAccessFile raf = null;
    try {//from  w  w  w .jav a 2 s  .c o  m
        raf = new RandomAccessFile(outputFile, "rw");

        // Master index
        raf.getChannel().position(masterIndexPositionPosition);
        BufferedByteWriter buffer = new BufferedByteWriter();
        buffer.putLong(masterIndexPosition);
        raf.write(buffer.getBytes());

    } finally {
        if (raf != null)
            raf.close();
    }
}

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From source file:com.mellanox.r4h.MiniDFSCluster.java

public static boolean corruptBlock(File blockFile) throws IOException {
    if (blockFile == null || !blockFile.exists()) {
        return false;
    }/*from   w w  w .  j a va 2s .  c  o m*/
    // Corrupt replica by writing random bytes into replica
    Random random = new Random();
    RandomAccessFile raFile = new RandomAccessFile(blockFile, "rw");
    FileChannel channel = raFile.getChannel();
    String badString = "BADBAD";
    int rand = random.nextInt((int) channel.size() / 2);
    raFile.seek(rand);
    raFile.write(badString.getBytes());
    raFile.close();
    LOG.warn("Corrupting the block " + blockFile);
    return true;
}

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From source file:big.BigZip.java

/**
 * Given a position inside our knowledge base, retrieve the data up to
 * the next file indicator./*  w w  w  . j a  v  a 2 s .  c  om*/
 * @param targetFile    The new file that will be created
 * @param startPosition The position from where we start to read the data
 * @param endPosition
 * @return 
 */
public boolean extractBytes(final File targetFile, final long startPosition, final Long endPosition) {
    /**
     * This is a tricky method. We will be extracting data from a the BIG
     * archive onto a new file somewhere on disk. The biggest challenge here
     * is to find exactly when the data for the file ends and still do the
     * file copy with a wonderful performance.
     */
    try {
        // enable random access to the BIG file (fast as heck)
        RandomAccessFile dataBIG = new RandomAccessFile(fileMainBIG, "r");
        // if the target file exists, try to delete it
        if (targetFile.exists()) {
            targetFile.delete();
            if (targetFile.exists()) {
                // we failed completely
                System.out.println("BIG405 - Failed to delete: " + targetFile.getAbsolutePath());
                return false;
            }
        }
        // we need to create a temporary zip file holder
        File fileZip = new File("temp.zip");
        // delete the zip file if it already exists
        if (fileZip.exists()) {
            fileZip.delete();
            if (fileZip.exists()) {
                // we failed completely
                System.out.println("BIG416 - Failed to delete: " + fileZip.getAbsolutePath());
                return false;
            }
        }

        // create a new file
        RandomAccessFile dataNew = new RandomAccessFile(fileZip, "rw");
        // jump directly to the position where the file is positioned
        dataBIG.seek(startPosition);
        // now we start reading bytes during the mentioned interval
        while (dataBIG.getFilePointer() < endPosition) {
            // read a byte from our BIG archive
            int data = dataBIG.read();
            // write the same byte on the target file
            dataNew.write(data);
        }

        // close the file streams
        dataBIG.close();
        dataNew.close();

        // extract the file
        zip.extract(fileZip, new File("."));
        // delete the temp zip file
        fileZip.delete();

    } catch (FileNotFoundException ex) {
        Logger.getLogger(BigZip.class.getName()).log(Level.SEVERE, null, ex);
        return false;
    } catch (IOException ex) {
        Logger.getLogger(BigZip.class.getName()).log(Level.SEVERE, null, ex);
        return false;
    }

    return true;
}

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From source file:au.org.ala.layers.intersect.Grid.java

/**
 * for DomainGenerator/*ww w. jav  a  2  s .co m*/
 * <p/>
 * writes out a list of double (same as getGrid() returns) to a file
 * <p/>
 * byteorderlsb
 * data type, FLOAT
 *
 * @param newfilename
 * @param dfiltered
 */
public void writeGrid(String newfilename, int[] dfiltered, double xmin, double ymin, double xmax, double ymax,
        double xres, double yres, int nrows, int ncols) {
    int size, i, length = dfiltered.length;
    double maxvalue = Integer.MAX_VALUE * -1;
    double minvalue = Integer.MAX_VALUE;

    //write data as whole file
    RandomAccessFile afile = null;
    try { //read of random access file can throw an exception
        afile = new RandomAccessFile(newfilename + ".gri", "rw");

        size = 4;
        byte[] b = new byte[size * length];
        ByteBuffer bb = ByteBuffer.wrap(b);

        if (byteorderLSB) {
            bb.order(ByteOrder.LITTLE_ENDIAN);
        } else {
            bb.order(ByteOrder.BIG_ENDIAN);
        }
        for (i = 0; i < length; i++) {
            bb.putInt(dfiltered[i]);
        }

        afile.write(b);
    } catch (Exception e) {
        logger.error("error writing grid file", e);
    } finally {
        if (afile != null) {
            try {
                afile.close();
            } catch (Exception e) {
                logger.error(e.getMessage(), e);
            }
        }
    }

    writeHeader(newfilename, xmin, ymin, xmin + xres * ncols, ymin + yres * nrows, xres, yres, nrows, ncols,
            minvalue, maxvalue, "INT4BYTES", "-9999");

}

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From source file:org.apache.hadoop.hive.service.HSSessionItem.java

public boolean uploadProto(String user, String fileName, byte[] array) throws HiveServerException {
    boolean res = true;
    String fname;/*  w  w w  . ja  v a 2s  . co m*/

    String dname = getHome() + "/protobuf/upload/" + user;
    File d = new File(dname);
    if (!d.exists()) {
        if (!d.mkdirs()) {
            l4j.error(getSessionName() + " try to mkdir " + dname + " failed.");
            throw new HiveServerException("Create user proto directory failed.");
        }
    }
    if (!fileName.trim().toLowerCase().endsWith(".proto")) {
        throw new HiveServerException(
                "Upload proto command can only handle .proto file, Check your file suffix");
    }

    fname = dname + "/" + fileName;

    RandomAccessFile raf;
    File f;
    try {
        f = new File(fname);
        if (!f.exists()) {
            if (!f.createNewFile()) {
                l4j.error("Try to create file " + fname + " failed.");
                throw new HiveServerException("Create user upload file " + fname + " failed.");
            }
        }
    } catch (java.io.IOException ex) {
        l4j.error(getSessionName() + " try to create file " + fname + " failed w/ " + ex);
        return false;
    }
    if (array.length == 0) {
        if (!f.delete()) {
            l4j.error("Try to delete file " + fname + " failed.");
            throw new HiveServerException("Delete user proto file " + fname + " failed.");
        } else {
            return true;
        }
    }
    try {
        raf = new RandomAccessFile(f, "rw");
    } catch (java.io.FileNotFoundException ex) {
        l4j.error(getSessionName() + " try to open file " + fname + " failed, not found.");
        return false;
    }
    try {
        raf.setLength(0);
        raf.seek(0);
        raf.write(array);
    } catch (java.io.IOException ex) {
        l4j.error(getSessionName() + " try to truncate/write file " + fname + "failed w/ " + ex);
        return false;
    }
    return res;
}

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From source file:org.apache.hadoop.hive.service.HSSessionItem.java

public boolean upload(String rtype, String user, String fileName, String data) throws HiveServerException {
    boolean res = true;
    String fname;/*  w ww .j  a v  a  2 s .c  om*/
    if (rtype.equalsIgnoreCase("jar")) {
        fname = getHome() + "/auxlib/" + fileName;
    } else if (rtype.equalsIgnoreCase("proto")) {
        String dname = getHome() + "/protobuf/upload/" + user;
        File d = new File(dname);
        if (!d.exists()) {
            if (!d.mkdirs()) {
                l4j.error(getSessionName() + " try to mkdir " + dname + " failed.");
                throw new HiveServerException("Create user proto directory failed.");
            }
        }
        if (!fileName.trim().toLowerCase().endsWith(".proto")) {
            throw new HiveServerException(
                    "Upload proto command can only handle .proto file, Check your file suffix");
        }

        fname = dname + "/" + fileName;
    } else {
        String errorMsg = "Can't upload filetype: " + rtype;
        l4j.error(getSessionName() + " upload failed: " + errorMsg);
        throw new HiveServerException("errorMsg");
    }

    RandomAccessFile raf;
    File f;
    try {
        f = new File(fname);
        if (!f.exists()) {
            if (!f.createNewFile()) {
                l4j.error("Try to create file " + fname + " failed.");
                throw new HiveServerException("Create user upload file " + fname + " failed.");
            }
        }
    } catch (java.io.IOException ex) {
        l4j.error(getSessionName() + " try to create file " + fname + " failed w/ " + ex);
        return false;
    }
    if (data.equalsIgnoreCase("")) {
        if (!f.delete()) {
            l4j.error("Try to delete file " + fname + " failed.");
            throw new HiveServerException("Delete user file " + fname + " failed.");
        } else {
            return true;
        }
    }

    try {
        raf = new RandomAccessFile(f, "rw");
    } catch (java.io.FileNotFoundException ex) {
        l4j.error(getSessionName() + " try to open file " + fname + " failed, not found.");
        return false;
    }
    try {
        raf.setLength(0);
        raf.seek(0);
        raf.write(data.getBytes());
    } catch (java.io.IOException ex) {
        l4j.error(getSessionName() + " try to truncate/write file " + fname + "failed w/ " + ex);
        return false;
    }
    return res;
}

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