Example usage for java.io RandomAccessFile RandomAccessFile

List of usage examples for java.io RandomAccessFile RandomAccessFile

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Introduction

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

Prototype

public RandomAccessFile(File file, String mode) throws FileNotFoundException

Source Link

Document

Creates a random access file stream to read from, and optionally to write to, the file specified by the File argument.

Usage

From source file:com.aoyetech.fee.commons.utils.FileUtils.java

public static String getFileContent(final File tFile)
        throws IOException, FileNotFoundException, UnsupportedEncodingException {
    if (!tFile.isFile()) {
        throw new IOException("?");
    }//  w  w w .  ja  va  2 s.com
    final RandomAccessFile file = new RandomAccessFile(tFile, "r");
    final long fileSize = file.length();
    final byte[] bytes = new byte[(int) fileSize];
    long readLength = 0L;
    while (readLength < fileSize) {
        final int onceLength = file.read(bytes, (int) readLength, (int) (fileSize - readLength));
        if (onceLength > 0) {
            readLength += onceLength;
        } else {
            break;
        }
    }

    IOUtils.closeQuietly(file);
    return new String(bytes, Constants.ENCODE);
}

From source file:io.pivotal.kr.load_gen.LineReader.java

public LineReader(int bufSize, String path) throws IOException {
    this.file = new RandomAccessFile(path, "r");
    this.reader = new BufferedInputStream(new FileInputStream(file.getFD()));
    this.cbuf = new byte[bufSize];
    this.rbuf = new byte[bufSize];
    this.offset = 0L;
    this.bufSize = bufSize;
    this.rbufIdx = 0;
}

From source file:com.linkedin.pinot.core.io.writer.impl.v1.FixedByteMultiValueWriter.java

public FixedByteMultiValueWriter(File file, int numDocs, int totalNumValues, int columnSizeInBytes)
        throws Exception {
    // there will be two sections header and data
    // header will contain N lines, each line corresponding to the
    int headerSize = numDocs * SIZE_OF_INT * NUM_COLS_IN_HEADER;
    int dataSize = totalNumValues * columnSizeInBytes;
    int totalSize = headerSize + dataSize;
    raf = new RandomAccessFile(file, "rw");
    headerBuffer = MmapUtils.mmapFile(raf, FileChannel.MapMode.READ_WRITE, 0, headerSize, file,
            this.getClass().getSimpleName() + " headerBuffer");
    dataBuffer = MmapUtils.mmapFile(raf, FileChannel.MapMode.READ_WRITE, headerSize, dataSize, file,
            this.getClass().getSimpleName() + " dataBuffer");
    headerWriter = new FixedByteSingleValueMultiColWriter(headerBuffer, numDocs, 2,
            new int[] { SIZE_OF_INT, SIZE_OF_INT });
    headerReader = new FixedByteSingleValueMultiColReader(headerBuffer, numDocs, 2,
            new int[] { SIZE_OF_INT, SIZE_OF_INT });

    dataWriter = new FixedByteSingleValueMultiColWriter(dataBuffer, totalNumValues, 1,
            new int[] { columnSizeInBytes });

}

From source file:com.asakusafw.runtime.util.lock.LocalFileLockProvider.java

@Override
public LocalFileLockObject<T> tryLock(T target) throws IOException {
    if (baseDirectory.mkdirs() == false && baseDirectory.isDirectory() == false) {
        throw new IOException(MessageFormat.format("Failed to create lock directory: {0}", baseDirectory));
    }/*from   w  w w. j a va2  s  . c o  m*/
    String fileName = String.format("%08x.lck", target == null ? -1 : target.hashCode()); //$NON-NLS-1$
    File lockFile = new File(baseDirectory, fileName);
    RandomAccessFile fd = new RandomAccessFile(lockFile, "rw"); //$NON-NLS-1$
    boolean success = false;
    try {
        if (LOG.isDebugEnabled()) {
            LOG.debug(MessageFormat.format("Start to acquire lock for \"{0}\" ({1})", //$NON-NLS-1$
                    target, lockFile));
        }
        FileLock lockEntity = getLock(target, lockFile, fd);
        if (lockEntity == null) {
            return null;
        } else {
            if (LOG.isDebugEnabled()) {
                LOG.debug(MessageFormat.format("Finished to acquire lock for \"{0}\" ({1})", //$NON-NLS-1$
                        target, lockFile));
            }
            try {
                fd.seek(0L);
                fd.setLength(0L);
                fd.write(String.valueOf(target).getBytes(ENCODING));
                success = true;
                return new LocalFileLockObject<>(target, lockFile, fd, lockEntity);
            } finally {
                if (success == false) {
                    lockEntity.release();
                }
            }
        }
    } finally {
        if (success == false) {
            fd.close();
        }
    }
}

From source file:com.linkedin.pinot.core.index.writer.impl.FixedByteWidthSingleColumnMultiValueWriter.java

public FixedByteWidthSingleColumnMultiValueWriter(File file, int numDocs, int totalNumValues,
        int columnSizeInBytes) throws Exception {
    // there will be two sections header and data
    // header will contain N lines, each line corresponding to the
    int headerSize = numDocs * SIZE_OF_INT * NUM_COLS_IN_HEADER;
    int dataSize = totalNumValues * columnSizeInBytes;
    int totalSize = headerSize + dataSize;
    raf = new RandomAccessFile(file, "rw");
    headerBuffer = MmapUtils.mmapFile(raf, FileChannel.MapMode.READ_WRITE, 0, headerSize, file,
            this.getClass().getSimpleName() + " headerBuffer");
    dataBuffer = MmapUtils.mmapFile(raf, FileChannel.MapMode.READ_WRITE, headerSize, dataSize, file,
            this.getClass().getSimpleName() + " dataBuffer");
    headerWriter = new FixedByteWidthRowColDataFileWriter(headerBuffer, numDocs, 2,
            new int[] { SIZE_OF_INT, SIZE_OF_INT });
    headerReader = new FixedByteWidthRowColDataFileReader(headerBuffer, numDocs, 2,
            new int[] { SIZE_OF_INT, SIZE_OF_INT });

    dataWriter = new FixedByteWidthRowColDataFileWriter(dataBuffer, totalNumValues, 1,
            new int[] { columnSizeInBytes });

}

From source file:com.owncloud.android.operations.ChunkedUploadFileOperation.java

@Override
protected int uploadFile(WebdavClient client) throws HttpException, IOException {
    int status = -1;

    FileChannel channel = null;/*from  ww w .ja  v a2  s . c o m*/
    RandomAccessFile raf = null;
    try {
        File file = new File(getStoragePath());
        raf = new RandomAccessFile(file, "r");
        channel = raf.getChannel();
        mEntity = new ChunkFromFileChannelRequestEntity(channel, getMimeType(), CHUNK_SIZE, file);
        ((ProgressiveDataTransferer) mEntity).addDatatransferProgressListeners(getDataTransferListeners());
        long offset = 0;
        String uriPrefix = client.getBaseUri() + WebdavUtils.encodePath(getRemotePath()) + "-chunking-"
                + Math.abs((new Random()).nextInt(9000) + 1000) + "-";
        long chunkCount = (long) Math.ceil((double) file.length() / CHUNK_SIZE);
        for (int chunkIndex = 0; chunkIndex < chunkCount; chunkIndex++, offset += CHUNK_SIZE) {
            if (mPutMethod != null) {
                mPutMethod.releaseConnection(); // let the connection available for other methods
            }
            mPutMethod = new PutMethod(uriPrefix + chunkCount + "-" + chunkIndex);
            mPutMethod.addRequestHeader(OC_CHUNKED_HEADER, OC_CHUNKED_HEADER);
            ((ChunkFromFileChannelRequestEntity) mEntity).setOffset(offset);
            mPutMethod.setRequestEntity(mEntity);
            status = client.executeMethod(mPutMethod);
            client.exhaustResponse(mPutMethod.getResponseBodyAsStream());
            Log_OC.d(TAG, "Upload of " + getStoragePath() + " to " + getRemotePath() + ", chunk index "
                    + chunkIndex + ", count " + chunkCount + ", HTTP result status " + status);
            if (!isSuccess(status))
                break;
        }

    } finally {
        if (channel != null)
            channel.close();
        if (raf != null)
            raf.close();
        if (mPutMethod != null)
            mPutMethod.releaseConnection(); // let the connection available for other methods
    }
    return status;
}

From source file:net.sf.zekr.common.resource.QuranText.java

/**
 * The private constructor, which loads the whole Quran text from file into memory (<code>quranText</code>
 * ).//  ww  w  . ja  va 2  s  .  c  o m
 * 
 * @param textType can be either UTHMANI_MODE or SIMPLE_MODE
 * @throws IOException
 */
protected QuranText(int textType) throws IOException {
    mode = textType;
    String qFile = ApplicationPath.SIMPLE_QURAN_TEXT_FILE;
    if (textType == UTHMANI_MODE) {
        qFile = ApplicationPath.UTHMANI_QURAN_TEXT_FILE;
    }

    RandomAccessFile raf = new RandomAccessFile(qFile, "r");
    byte[] buf = new byte[(int) raf.length()];
    raf.readFully(buf);
    rawText = new String(buf, config.getProps().getString("quran.text.encoding"));
    refineRawText();
    raf.close();
}

From source file:ja.centre.util.io.nio.MappedByteBufferWrapper.java

public MappedByteBufferWrapper(String fileName) throws IOException {
    Arguments.assertNotNull("fileName", fileName);

    Files.assertExists(fileName);

    LOG.info("Opening \"" + fileName + "\"...");
    this.fileName = fileName;

    try {/*from   w ww  .  j  av  a  2s.  co  m*/
        raf = new RandomAccessFile(fileName, "rw");

        try {
            initBuffer();
        } catch (IOException e) {
            LOG.info("Could not lock file \"" + fileName + "\". Switching to non-locking mode...");

            Files.closeQuietly(raf);
            raf = new RandomAccessFile(fileName, "r");
            initBuffer();
        }
    } catch (IOException e) {
        Files.closeQuietly(raf);
        throw e;
    }
}

From source file:com.liferay.faces.bridge.renderkit.primefaces.internal.PrimeFacesFileItem.java

public byte[] get() {

    byte[] bytes = null;

    try {// w w  w .  j  ava  2  s.  co  m
        File file = new File(uploadedFile.getAbsolutePath());

        if (file.exists()) {
            RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
            bytes = new byte[(int) randomAccessFile.length()];
            randomAccessFile.readFully(bytes);
            randomAccessFile.close();
            file.delete();
        }
    } catch (Exception e) {
        logger.error(e);
    }

    return bytes;
}

From source file:ListOfNumbers2.java

public void readList(String fileName) {
    String line = null;//from w  w w  .  j  a v a 2  s .co m
    try {
        RandomAccessFile raf = new RandomAccessFile(fileName, "r");
        while ((line = raf.readLine()) != null) {
            Integer i = new Integer(Integer.parseInt(line));
            System.out.println(i);
            victor.addElement(i);
        }
    } catch (FileNotFoundException fnf) {
        System.err.println("File: " + fileName + " not found.");
    } catch (IOException io) {
        System.err.println(io.toString());
    }
}