Example usage for java.io RandomAccessFile RandomAccessFile

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:org.myframe.http.FileRequest.java

public byte[] handleResponse(HttpResponse response) throws IOException, KJHttpException {
    HttpEntity entity = response.getEntity();
    long fileSize = entity.getContentLength();
    if (fileSize <= 0) {
        MLoger.debug("Response doesn't present Content-Length!");
    }// w w  w. ja v a 2  s.c om

    long downloadedSize = mTemporaryFile.length();
    boolean isSupportRange = HttpUtils.isSupportRange(response);
    if (isSupportRange) {
        fileSize += downloadedSize;

        String realRangeValue = HttpUtils.getHeader(response, "Content-Range");
        if (!TextUtils.isEmpty(realRangeValue)) {
            String assumeRangeValue = "bytes " + downloadedSize + "-" + (fileSize - 1);
            if (TextUtils.indexOf(realRangeValue, assumeRangeValue) == -1) {
                throw new IllegalStateException("The Content-Range Header is invalid Assume[" + assumeRangeValue
                        + "] vs Real[" + realRangeValue + "], " + "please remove the temporary file ["
                        + mTemporaryFile + "].");
            }
        }
    }

    if (fileSize > 0 && mStoreFile.length() == fileSize) {
        mStoreFile.renameTo(mTemporaryFile);
        mRequestQueue.getConfig().mDelivery.postDownloadProgress(this, fileSize, fileSize);
        return null;
    }

    RandomAccessFile tmpFileRaf = new RandomAccessFile(mTemporaryFile, "rw");
    if (isSupportRange) {
        tmpFileRaf.seek(downloadedSize);
    } else {
        tmpFileRaf.setLength(0);
        downloadedSize = 0;
    }

    try {
        InputStream in = entity.getContent();
        if (HttpUtils.isGzipContent(response) && !(in instanceof GZIPInputStream)) {
            in = new GZIPInputStream(in);
        }
        byte[] buffer = new byte[6 * 1024]; // 6K buffer
        int offset;

        while ((offset = in.read(buffer)) != -1) {
            tmpFileRaf.write(buffer, 0, offset);

            downloadedSize += offset;
            mRequestQueue.getConfig().mDelivery.postDownloadProgress(this, fileSize, downloadedSize);

            if (isCanceled()) {
                break;
            }
        }
    } finally {
        try {
            if (entity != null)
                entity.consumeContent();
        } catch (Exception e) {
            MLoger.debug("Error occured when calling consumingContent");
        }
        tmpFileRaf.close();
    }
    return null;
}

---

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

private void createBuffer(File file) throws FileNotFoundException, IOException {
    raf = new RandomAccessFile(file, "rw");
    byteBuffer = MmapUtils.mmapFile(raf, FileChannel.MapMode.READ_WRITE, 0, bytesRequired, file,
            this.getClass().getSimpleName() + " byteBuffer");
    byteBuffer.position(0);//ww w . j a v  a 2 s  .  com
    for (int i = 0; i < bytesRequired; i++) {
        byteBuffer.put((byte) 0);
    }
}

---

From source file:com.almende.eve.state.file.ConcurrentSerializableFileState.java

/**
 * Open file.//  w  w w .  j ava 2  s . co m
 * 
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
@SuppressWarnings("resource")
protected void openFile() throws IOException {
    synchronized (locked) {
        while (locked.containsKey(filename) && locked.get(filename)) {
            try {
                locked.wait();
            } catch (final InterruptedException e) {
            }
        }
        locked.put(filename, true);

        final File file = new File(filename);
        if (!file.exists()) {
            locked.put(filename, false);
            locked.notifyAll();
            throw new IllegalStateException("Warning: File doesn't exist (anymore):'" + filename + "'");
        }
        channel = new RandomAccessFile(file, "rw").getChannel();

        try {
            // TODO: add support for shared locks, allowing parallel reading
            // operations.
            lock = channel.lock();
        } catch (final Exception e) {
            channel.close();
            channel = null;
            lock = null;
            locked.put(filename, false);
            locked.notifyAll();
            throw new IllegalStateException("error, couldn't obtain file lock on:" + filename, e);
        }
        fis = new BufferedInputStream(Channels.newInputStream(channel));
        fos = new BufferedOutputStream(Channels.newOutputStream(channel));
    }
}

---

From source file:com.turn.ttorrent.client.storage.FileStorage.java

/** Move the partial file to its final location.
 *//*  ww  w.  jav a 2  s  .c om*/
@Override
public synchronized void finish() throws IOException {
    this.channel.force(true);

    // Nothing more to do if we're already on the target file.
    if (this.isFinished()) {
        return;
    }

    this.raf.close();
    FileUtils.deleteQuietly(this.target);
    FileUtils.moveFile(this.current, this.target);

    logger.debug("Re-opening torrent byte storage at {}.", this.target.getAbsolutePath());

    this.raf = new RandomAccessFile(this.target, "rw");
    this.raf.setLength(this.size);
    this.channel = this.raf.getChannel();
    this.current = this.target;

    FileUtils.deleteQuietly(this.partial);
    logger.info("Moved torrent data from {} to {}.", this.partial.getName(), this.target.getName());
}

---

From source file:bobs.is.compress.sevenzip.SevenZFile.java

/**
 * Reads a file as 7z archive//w  w w .  j  a  va  2s. c  om
 *
 * @param filename the file to read
 * @param password optional password if the archive is encrypted -
 * the byte array is supposed to be the UTF16-LE encoded
 * representation of the password.
 * @throws IOException if reading the archive fails
 */
public SevenZFile(final File filename, final byte[] password) throws IOException {
    this.mapFilename = new HashMap();
    boolean succeeded = false;
    this.file = new RandomAccessFile(filename, "r");
    this.fileName = filename.getAbsolutePath();
    try {
        archive = readHeaders(password);
        if (password != null) {
            this.password = new byte[password.length];
            System.arraycopy(password, 0, this.password, 0, password.length);
        } else {
            this.password = null;
        }
        succeeded = true;
    } finally {
        if (!succeeded) {
            this.file.close();
        }
    }
}

---

From source file:hoot.services.info.ErrorLog.java

public String generateExportLog() throws Exception {
    String fileId = UUID.randomUUID().toString();
    String outputPath = _tempOutputPath + "/" + fileId;

    String data = "";

    AboutResource about = new AboutResource();
    VersionInfo vInfo = about.getCoreVersionInfo();
    data = "\n************ CORE VERSION INFO ***********\n";
    data += vInfo.toString();//from  w  ww .j av  a  2s  .c  om
    CoreDetail cd = about.getCoreVersionDetail();
    data += "\n************ CORE ENVIRONMENT ***********\n";
    if (cd != null) {
        data += StringUtils.join(cd.getEnvironmentInfo(), '\n');
    }

    data = "\n************ SERVICE VERSION INFO ***********\n";
    data += about.getServicesVersionInfo().toString();
    ServicesDetail sd = about.getServicesVersionDetail();
    if (sd != null) {
        data += "\n************ SERVICE DETAIL PROPERTY ***********\n";
        for (ServicesDetail.Property prop : sd.getProperties()) {
            String str = prop.getName() + " : " + prop.getValue() + "\n";
            data += str;
        }

        data += "\n************ SERVICE DETAIL RESOURCE ***********\n";
        for (ServicesDetail.ServicesResource res : sd.getResources()) {
            String str = res.getType() + " : " + res.getUrl() + "\n";
            data += str;
        }
    }

    data += "\n************ CATALINA LOG ***********\n";

    // 5MB Max
    int maxSize = 5000000;

    String logStr = getErrorlog(maxSize);

    RandomAccessFile raf = new RandomAccessFile(outputPath, "rw");
    raf.writeBytes(data + "\n" + logStr);
    raf.close();
    return outputPath;
}

---

From source file:com.aliyun.oss.integrationtests.TestUtils.java

public static String genFixedLengthFile(long fixedLength) throws IOException {
    ensureDirExist(TestBase.UPLOAD_DIR);
    String filePath = TestBase.UPLOAD_DIR + System.currentTimeMillis();
    RandomAccessFile raf = new RandomAccessFile(filePath, "rw");
    FileChannel fc = raf.getChannel();

    MappedByteBuffer mbb = fc.map(MapMode.READ_WRITE, 0, fixedLength);
    try {//from  w  w w  . java  2  s  .c om
        for (int i = 0; i < fixedLength; i++) {
            mbb.put(pickupAlphabet());
        }
        return filePath;
    } finally {
        if (fc != null) {
            fc.close();
        }

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

---

From source file:ape.CorruptCommand.java

/**
 * This method is the implementation of the corrupt function.
 * Given an address, it corrupts the file in the given address
 */// www .  jav  a 2  s.com
public boolean corrupt(String corruptAddress) throws IOException {
    // Trying to get a random HDFS block file
    if (Main.VERBOSE) {
        System.out.println("Trying to get a random HDFS block file");
    }
    if (corruptAddress == null) {
        corruptAddress = getCorruptAddress();
    }

    // If the above statement failed to set corruptAddress then there was a failure
    if (corruptAddress == null) {
        System.out.println("Could not get a random HDFS block file");
        Main.logger.info("Could not get a random HDFS block file");
        return false;
    }

    byte[] buf;
    int count;

    try {
        RandomAccessFile tmp = new RandomAccessFile(corruptAddress, "rw");
        tmp.seek(offset);
        if (size <= 0) {
            System.out.println("ERROR: The size parameter must be positive");
            Main.logger.info("ERROR: The size parameter must be positive");
            return false;
        }

        buf = new byte[size];

        count = 0;
        if ((count = tmp.read(buf, 0, size)) == -1) {
            System.out.println("The file chosen is smaller than the corruption size (" + size + " bytes)");
            Main.logger.info("The file chosen is smaller than the corruption size (" + size + " bytes)");
            return false;
        }

        for (int i = 0; i < count; i++) {
            buf[i] = 0x3;
        }

        tmp.seek(0);
        tmp.close();
    } catch (FileNotFoundException e1) {
        System.out.println("Cannot open the file on the path given");
        Main.logger.info("Cannot open the file on the path given");
        e1.printStackTrace();
        Main.logger.info(e1);
        return false;
    } catch (IOException e) {
        System.out.println("Corrupting file failed");
        Main.logger.info("Corrupting file failed");
        e.printStackTrace();
        Main.logger.info(e);
        return false;
    }

    RandomAccessFile raf;
    try {
        raf = new RandomAccessFile(corruptAddress, "rw");
        raf.seek(offset);
        raf.write(buf, 0, count);
        raf.seek(0);
        raf.close();

        return true;
    } catch (FileNotFoundException e1) {
        System.out.println("Cannot open the file on the path: " + corruptAddress);
        Main.logger.info("Cannot open the file on the path: " + corruptAddress);
        e1.printStackTrace();
        Main.logger.info(e1);
        return false;
    } catch (IOException e) {
        System.out.println("Corrupting file failed");
        Main.logger.info("Corrupting file failed");
        e.printStackTrace();
        Main.logger.info(e);
        return false;
    }
}

---

From source file:com.scut.easyfe.network.kjFrame.http.FileRequest.java

public byte[] handleResponse(HttpResponse response) throws IOException, KJHttpException {
    HttpEntity entity = response.getEntity();
    long fileSize = entity.getContentLength();
    if (fileSize <= 0) {
        KJLoger.debug("Response doesn't present Content-Length!");
    }//ww w.j  av  a 2 s.  c  o m

    long downloadedSize = mTemporaryFile.length();
    boolean isSupportRange = HttpUtils.isSupportRange(response);
    if (isSupportRange) {
        fileSize += downloadedSize;

        String realRangeValue = HttpUtils.getHeader(response, "Content-Range");
        if (!TextUtils.isEmpty(realRangeValue)) {
            String assumeRangeValue = "bytes " + downloadedSize + "-" + (fileSize - 1);
            if (TextUtils.indexOf(realRangeValue, assumeRangeValue) == -1) {
                throw new IllegalStateException("The Content-Range Header is invalid Assume[" + assumeRangeValue
                        + "] vs Real[" + realRangeValue + "], " + "please remove the temporary file ["
                        + mTemporaryFile + "].");
            }
        }
    }

    if (fileSize > 0 && mStoreFile.length() == fileSize) {
        mStoreFile.renameTo(mTemporaryFile);
        mRequestQueue.getConfig().mDelivery.postDownloadProgress(this, fileSize, fileSize);
        return null;
    }

    RandomAccessFile tmpFileRaf = new RandomAccessFile(mTemporaryFile, "rw");
    if (isSupportRange) {
        tmpFileRaf.seek(downloadedSize);
    } else {
        tmpFileRaf.setLength(0);
        downloadedSize = 0;
    }

    try {
        InputStream in = entity.getContent();
        if (HttpUtils.isGzipContent(response) && !(in instanceof GZIPInputStream)) {
            in = new GZIPInputStream(in);
        }
        byte[] buffer = new byte[6 * 1024]; // 6K buffer
        int offset;

        while ((offset = in.read(buffer)) != -1) {
            tmpFileRaf.write(buffer, 0, offset);

            downloadedSize += offset;
            mRequestQueue.getConfig().mDelivery.postDownloadProgress(this, fileSize, downloadedSize);

            if (isCanceled()) {
                break;
            }
        }
    } finally {
        try {
            if (entity != null)
                entity.consumeContent();
        } catch (Exception e) {
            KJLoger.debug("Error occured when calling consumingContent");
        }
        tmpFileRaf.close();
    }
    return null;
}

---

From source file:io.github.eternalbits.compactvd.CompactVD.java

private void copy(File from, int options, File to, String type) throws IOException {
    long mtime = to.lastModified();
    task = DiskImageProgress.COPY;//from   ww  w. j a  v  a  2s .  co m
    File copy = null;
    try (RandomAccessFile check = new RandomAccessFile(from, "r")) { // is file?
        // If writable, source is open in write mode for an exclusive file lock
        String mode = from.canWrite() ? "rw" : "r";
        try (DiskImage image = DiskImages.open(from, mode)) {
            if (type == null)
                type = image.getType();
            try (DiskImage clone = DiskImages.create(type, to, image.getDiskSize())) {
                copy = to; // copy open by DiskImage
                FileLock source = null;
                if (mode.equals("rw"))
                    source = image.tryLock();
                verboseProgress(SEARCHING_SPACE);
                image.addObserver(this, false);
                image.optimize(options);
                image.removeObserver(this);
                if (!isCancelled()) {
                    verboseProgress("Copying " + from.getName() + " to " + to.getName());
                    FileLock fileLock = clone.tryLock();
                    clone.addObserver(this, false);
                    clone.copy(image);
                    clone.removeObserver(this);
                    fileLock.release();
                }
                if (source != null)
                    source.release();
                if (!isCancelled()) {
                    copy = null;
                }
            }
        }
    } finally {
        if (copy != null && copy.isFile())
            copy.delete();
        System.out.println(mtime != to.lastModified()
                ? String.format(IMAGE_CREATED, to.getName(), to.getAbsoluteFile().getParent())
                : IMAGE_NOT_CREATED);
    }
}

---

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