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.thoughtworks.go.config.GoConfigDataSource.java

public synchronized GoConfigSaveResult writeWithLock(UpdateConfigCommand updatingCommand,
        GoConfigHolder configHolder) {// www. jav  a2s .  co  m
    FileChannel channel = null;
    FileOutputStream outputStream = null;
    FileLock lock = null;
    try {
        RandomAccessFile randomAccessFile = new RandomAccessFile(fileLocation(), "rw");
        channel = randomAccessFile.getChannel();
        lock = channel.lock();

        // Need to convert to xml before we try to write it to the config file.
        // If our cruiseConfig fails XSD validation, we don't want to write it incorrectly.
        String configAsXml = getModifiedConfig(updatingCommand, configHolder);

        randomAccessFile.seek(0);
        randomAccessFile.setLength(0);
        outputStream = new FileOutputStream(randomAccessFile.getFD());
        LOGGER.info(String.format("[Configuration Changed] Saving updated configuration."));
        IOUtils.write(configAsXml, outputStream);
        ConfigSaveState configSaveState = shouldMergeConfig(updatingCommand, configHolder)
                ? ConfigSaveState.MERGED
                : ConfigSaveState.UPDATED;
        return new GoConfigSaveResult(internalLoad(configAsXml, getConfigUpdatingUser(updatingCommand)),
                configSaveState);
    } catch (ConfigFileHasChangedException e) {
        LOGGER.warn("Configuration file could not be merged successfully after a concurrent edit: "
                + e.getMessage(), e);
        throw e;
    } catch (GoConfigInvalidException e) {
        LOGGER.warn("Configuration file is invalid: " + e.getMessage(), e);
        throw bomb(e.getMessage(), e);
    } catch (Exception e) {
        LOGGER.error("Configuration file is not valid: " + e.getMessage(), e);
        throw bomb(e.getMessage(), e);
    } finally {
        if (channel != null && lock != null) {
            try {
                lock.release();
                channel.close();
                IOUtils.closeQuietly(outputStream);
            } catch (IOException e) {
                LOGGER.error("Error occured when releasing file lock and closing file.", e);
            }
        }
        LOGGER.debug("[Config Save] Done writing with lock");
    }
}

From source file:com.ettrema.zsync.UploadMakerEx.java

/**
 * Constructs the List of DataRange objects containing the portions of the client file
 * to be uploaded to the server. Currently unused.
 * //  w ww  .  j a  v a  2s . c  om
 * @param ranges The List of Ranges from the client file needed by the server, which can be 
 * obtained from {@link #serversMissingRangesEx(List, long, int)}
 * @param local The client file to be uploaded
 * @return An InputStream containing the dataStream portion of an Upload
 * @throws IOException
 */
public static InputStream getDataRanges(List<Range> ranges, File local) throws IOException {

    int MAX_BUFFER = 1024 * 1024;

    ByteRangeWriter byteRanges = new ByteRangeWriter(MAX_BUFFER);
    RandomAccessFile randAccess = new RandomAccessFile(local, "r");

    for (Range range : ranges) {

        byteRanges.add(range, randAccess);
    }

    return byteRanges.getInputStream();
}

From source file:com.gsbabil.antitaintdroid.UtilityFunctions.java

/**
 * Source://from   w ww. ja v a2 s  .  co m
 * http://stackoverflow.com/questions/4349075/bitmapfactory-decoderesource
 * -returns-a-mutable-bitmap-in-android-2-2-and-an-immu
 * 
 * Converts a immutable bitmap to a mutable bitmap. This operation doesn't
 * allocates more memory that there is already allocated.
 * 
 * @param imgIn
 *            - Source image. It will be released, and should not be used
 *            more
 * @return a copy of imgIn, but immutable.
 */
public static Bitmap convertBitmapToMutable(Bitmap imgIn) {
    try {
        // this is the file going to use temporally to save the bytes.
        // This file will not be a image, it will store the raw image data.
        File file = new File(MyApp.context.getFilesDir() + File.separator + "temp.tmp");

        // Open an RandomAccessFile
        // Make sure you have added uses-permission
        // android:name="android.permission.WRITE_EXTERNAL_STORAGE"
        // into AndroidManifest.xml file
        RandomAccessFile randomAccessFile = new RandomAccessFile(file, "rw");

        // get the width and height of the source bitmap.
        int width = imgIn.getWidth();
        int height = imgIn.getHeight();
        Config type = imgIn.getConfig();

        // Copy the byte to the file
        // Assume source bitmap loaded using options.inPreferredConfig =
        // Config.ARGB_8888;
        FileChannel channel = randomAccessFile.getChannel();
        MappedByteBuffer map = channel.map(MapMode.READ_WRITE, 0, imgIn.getRowBytes() * height);
        imgIn.copyPixelsToBuffer(map);
        // recycle the source bitmap, this will be no longer used.
        imgIn.recycle();
        System.gc();// try to force the bytes from the imgIn to be released

        // Create a new bitmap to load the bitmap again. Probably the memory
        // will be available.
        imgIn = Bitmap.createBitmap(width, height, type);
        map.position(0);
        // load it back from temporary
        imgIn.copyPixelsFromBuffer(map);
        // close the temporary file and channel , then delete that also
        channel.close();
        randomAccessFile.close();

        // delete the temporary file
        file.delete();

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return imgIn;
}

From source file:com.aol.advertising.qiao.util.CommonUtils.java

public static long checksum(File file, int numBytes)
        throws IOException, FileNotFoundException, InterruptedException, InsufficientFileLengthException {
    RandomAccessFile raf = null;//ww w .j av  a  2 s  .c om
    try {
        raf = new RandomAccessFile(file, "r");
        long v = checksum(raf, numBytes);
        return v;
    } finally {
        IOUtils.closeQuietly(raf);
    }

}

From source file:com.qumasoft.qvcslib.CompareFilesWithApacheDiff.java

private CompareLineInfo[] buildLinesFromFile(File inFile) throws IOException {
    List<CompareLineInfo> lineInfoList = new ArrayList<>();
    RandomAccessFile randomAccessFile = new RandomAccessFile(inFile, "r");
    long fileLength = randomAccessFile.length();
    int startOfLineSeekPosition = 0;
    int currentSeekPosition = 0;
    byte character;
    while (currentSeekPosition < fileLength) {
        character = randomAccessFile.readByte();
        currentSeekPosition = (int) randomAccessFile.getFilePointer();
        if (character == '\n') {
            int endOfLine = (int) randomAccessFile.getFilePointer();
            byte[] buffer = new byte[endOfLine - startOfLineSeekPosition];
            randomAccessFile.seek(startOfLineSeekPosition);
            randomAccessFile.readFully(buffer);
            String line = new String(buffer, UTF8);
            CompareLineInfo lineInfo = new CompareLineInfo(startOfLineSeekPosition, createCompareLine(line));
            lineInfoList.add(lineInfo);/*from   ww w .  jav  a  2s.  c o m*/
            startOfLineSeekPosition = endOfLine;
        }
    }
    // Add the final line which can happen if it doesn't end in a newline.
    if ((fileLength - startOfLineSeekPosition) > 0L) {
        byte[] buffer = new byte[(int) fileLength - startOfLineSeekPosition];
        randomAccessFile.seek(startOfLineSeekPosition);
        randomAccessFile.readFully(buffer);
        String line = new String(buffer, UTF8);
        CompareLineInfo lineInfo = new CompareLineInfo(startOfLineSeekPosition, createCompareLine(line));
        lineInfoList.add(lineInfo);
    }
    CompareLineInfo[] lineInfoArray = new CompareLineInfo[lineInfoList.size()];
    int i = 0;
    for (CompareLineInfo lineInfo : lineInfoList) {
        lineInfoArray[i++] = lineInfo;
    }
    return lineInfoArray;
}

From source file:edu.rit.flick.DefaultFlickFile.java

@Override
public File inflate(final Configuration configuration, final File fileIn, final File fileOut) {
    try {/* w  w  w. j ava  2 s .  com*/
        if (!getDefaultDeflatedExtension().endsWith(Files.getFileExtension(fileIn.getName()))) {
            final File decompressedFile = archiveFile(fileIn, true);

            if (decompressedFile != null && configuration.getFlag(DELETE_FLAG))
                if (!FileUtils.deleteQuietly(fileIn))
                    System.err.printf(FILE_COULD_NOT_BE_DELETED_WARNING_FORMAT, fileIn.getPath());

            return decompressedFile;
        }

        final LongAdder unzippedContentsSize = new LongAdder();

        final long inputFileSize = FileUtils.sizeOf(fileIn);
        final long t0 = System.currentTimeMillis();

        flickFile.extractAll(fileOut.getPath());

        final RandomAccessFile raf = new RandomAccessFile(flickFile.getFile(), InternalZipConstants.READ_MODE);

        final HeaderReader hr = new HeaderReader(raf);
        final ZipModel zm = hr.readAllHeaders();
        final CentralDirectory centralDirectory = zm.getCentralDirectory();
        @SuppressWarnings("unchecked")
        final List<FileHeader> fhs = Collections.checkedList(centralDirectory.getFileHeaders(),
                FileHeader.class);

        final List<File> files = fhs.stream().map(fh -> {
            final File file = FileUtils.getFile(fileOut.getPath(), File.separator, fh.getFileName());
            unzippedContentsSize.add(file.length());
            return file;
        }).collect(Collectors.toList());

        if (!configuration.getFlag(KEEP_ZIPPED_FLAG))
            // Traverse directory and look for files to decompress
            for (final File file : files) {
                File decompressedFile = null;
                if (!file.isDirectory())
                    decompressedFile = archiveFile(file, false);

                if (decompressedFile != null) {
                    unzippedContentsSize.add(-FileUtils.sizeOf(file));
                    unzippedContentsSize.add(FileUtils.sizeOf(decompressedFile));
                    file.delete();
                }
            }

        raf.close();

        if (configuration.getFlag(DELETE_FLAG))
            if (!FileUtils.deleteQuietly(fileIn))
                System.err.printf(FILE_COULD_NOT_BE_DELETED_WARNING_FORMAT, fileIn.getPath());

        final double overallTime = (System.currentTimeMillis() - t0) / 1000d;

        if (configuration.getFlag(VERBOSE_FLAG)) {
            // Get the percent deflation on the compressed file
            final double percDeflated = 100 * unzippedContentsSize.doubleValue() / inputFileSize;

            System.out.printf(VERBOSE_DECOMPRESSION_INFO_FORMAT, fileIn.getName(), overallTime, percDeflated);
        }
    } catch (final Exception e) {
        e.printStackTrace();
    }

    return fileOut;
}

From source file:org.openmeetings.servlet.outputhandler.ExportToImage.java

@Override
protected void service(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
        throws ServletException, IOException {

    try {//ww  w .j  ava  2 s . co  m
        if (getUserManagement() == null || getSessionManagement() == null || getGenerateImage() == null) {
            return;
        }

        String sid = httpServletRequest.getParameter("sid");
        if (sid == null) {
            sid = "default";
        }
        log.debug("sid: " + sid);

        String hash = httpServletRequest.getParameter("hash");
        if (hash == null) {
            hash = "";
        }
        log.debug("hash: " + hash);

        String fileName = httpServletRequest.getParameter("fileName");
        if (fileName == null) {
            fileName = "file_xyz";
        }

        String exportType = httpServletRequest.getParameter("exportType");
        if (exportType == null) {
            exportType = "svg";
        }

        Long users_id = getSessionManagement().checkSession(sid);
        Long user_level = getUserManagement().getUserLevelByID(users_id);

        log.debug("users_id: " + users_id);
        log.debug("user_level: " + user_level);

        if (user_level != null && user_level > 0 && hash != "") {

            PrintBean pBean = PrintService.getPrintItemByHash(hash);

            // Whiteboard Objects
            @SuppressWarnings("rawtypes")
            List whiteBoardMap = pBean.getMap();

            // Get a DOMImplementation.
            DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();

            // Create an instance of org.w3c.dom.Document.
            // String svgNS = "http://www.w3.org/2000/svg";
            String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;

            Document document = domImpl.createDocument(svgNS, "svg", null);

            // Get the root element (the 'svg' element).
            Element svgRoot = document.getDocumentElement();

            // Set the width and height attributes on the root 'svg'
            // element.
            svgRoot.setAttributeNS(null, "width", "" + pBean.getWidth());
            svgRoot.setAttributeNS(null, "height", "" + pBean.getHeight());

            log.debug("pBean.getWidth(),pBean.getHeight()" + pBean.getWidth() + "," + pBean.getHeight());

            // Create an instance of the SVG Generator.
            SVGGraphics2D svgGenerator = new SVGGraphics2D(document);

            svgGenerator = WhiteboardMapToSVG.getInstance().convertMapToSVG(svgGenerator, whiteBoardMap);

            // Finally, stream out SVG to the standard output using
            // UTF-8 encoding.
            boolean useCSS = true; // we want to use CSS style attributes
            // Writer out = new OutputStreamWriter(System.out, "UTF-8");

            if (exportType.equals("svg")) {
                // OutputStream out = httpServletResponse.getOutputStream();
                // httpServletResponse.setContentType("APPLICATION/OCTET-STREAM");
                // httpServletResponse.setHeader("Content-Disposition","attachment; filename=\""
                // + requestedFile + "\"");
                Writer out = httpServletResponse.getWriter();

                svgGenerator.stream(out, useCSS);

            } else if (exportType.equals("png") || exportType.equals("jpg") || exportType.equals("gif")
                    || exportType.equals("tif") || exportType.equals("pdf")) {

                String current_dir = getServletContext().getRealPath("/");
                String working_dir = current_dir + OpenmeetingsVariables.UPLOAD_TEMP_DIR + File.separatorChar;

                String requestedFileSVG = fileName + "_" + CalendarPatterns.getTimeForStreamId(new Date())
                        + ".svg";
                String resultFileName = fileName + "_" + CalendarPatterns.getTimeForStreamId(new Date()) + "."
                        + exportType;

                log.debug("current_dir: " + current_dir);
                log.debug("working_dir: " + working_dir);
                log.debug("requestedFileSVG: " + requestedFileSVG);
                log.debug("resultFileName: " + resultFileName);

                File svgFile = new File(working_dir + requestedFileSVG);
                File resultFile = new File(working_dir + resultFileName);

                log.debug("svgFile: " + svgFile.getAbsolutePath());
                log.debug("resultFile: " + resultFile.getAbsolutePath());
                log.debug("svgFile P: " + svgFile.getPath());
                log.debug("resultFile P: " + resultFile.getPath());

                FileWriter out = new FileWriter(svgFile);
                svgGenerator.stream(out, useCSS);

                // Get file and handle download
                RandomAccessFile rf = new RandomAccessFile(resultFile.getAbsoluteFile(), "r");

                httpServletResponse.reset();
                httpServletResponse.resetBuffer();
                OutputStream outStream = httpServletResponse.getOutputStream();
                httpServletResponse.setContentType("APPLICATION/OCTET-STREAM");
                httpServletResponse.setHeader("Content-Disposition",
                        "attachment; filename=\"" + resultFileName + "\"");
                httpServletResponse.setHeader("Content-Length", "" + rf.length());

                byte[] buffer = new byte[1024];
                int readed = -1;

                while ((readed = rf.read(buffer, 0, buffer.length)) > -1) {
                    outStream.write(buffer, 0, readed);
                }
                outStream.close();
                rf.close();

                out.flush();
                out.close();

            }

        }

    } catch (Exception er) {
        log.error("ERROR ", er);
        System.out.println("Error exporting: " + er);
        er.printStackTrace();
    }
}

From source file:jm.web.Archivo.java

public String getArchivoXml(String path, String tabla, String clave, String campoNombre, String campo) {
    this._archivoNombre = "";
    try {/*  ww  w.j a  v  a 2s . c o m*/
        ResultSet res = this.consulta("select * from " + tabla + " where clave_acceso='" + clave + "'   ;");
        if (res.next()) {
            this._archivoNombre = res.getString(campoNombre) != null ? res.getString(campoNombre) : "";
            if (this._archivoNombre.compareTo("") != 0) {
                try {
                    this._archivo = new File(path, this._archivoNombre);
                    if (!this._archivo.exists()) {
                        //byte[] bytes = (res.getString(campoBytea)!=null) ? res.getBytes(campoBytea) : null;
                        RandomAccessFile archivo = new RandomAccessFile(path + this._archivoNombre + ".xml",
                                "rw");
                        archivo.writeBytes(campo);
                        archivo.close();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            res.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return this._archivoNombre;
}

From source file:com.metamesh.opencms.rfs.RfsAwareDumpLoader.java

/**
 * @see org.opencms.loader.I_CmsResourceLoader#load(org.opencms.file.CmsObject, org.opencms.file.CmsResource, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
 *///  www . j  ava2s . c o m
public void load(CmsObject cms, CmsResource resource, HttpServletRequest req, HttpServletResponse res)
        throws IOException, CmsException {

    if (!(resource instanceof RfsCmsResource)) {
        super.load(cms, resource, req, res);
        return;
    }

    if (canSendLastModifiedHeader(resource, req, res)) {
        // no further processing required
        return;
    }

    if (CmsWorkplaceManager.isWorkplaceUser(req)) {
        // prevent caching for Workplace users
        res.setDateHeader(CmsRequestUtil.HEADER_LAST_MODIFIED, System.currentTimeMillis());
        CmsRequestUtil.setNoCacheHeaders(res);
    }

    RfsCmsResource rfsFile = (RfsCmsResource) resource;
    File f = rfsFile.getRfsFile();

    if (f.getName().toLowerCase().endsWith("webm")) {
        res.setHeader("Content-Type", "video/webm");
    } else if (f.getName().toLowerCase().endsWith("ogv")) {
        res.setHeader("Content-Type", "video/ogg");
    } else if (f.getName().toLowerCase().endsWith("mp4")) {
        res.setHeader("Content-Type", "video/mp4");
    }

    if (req.getMethod().equalsIgnoreCase("HEAD")) {
        res.setStatus(HttpServletResponse.SC_OK);
        res.setHeader("Accept-Ranges", "bytes");
        res.setContentLength((int) f.length());
        return;
    } else if (req.getMethod().equalsIgnoreCase("GET")) {
        if (req.getHeader("Range") != null) {

            String range = req.getHeader("Range");

            String[] string = range.split("=")[1].split("-");
            long start = Long.parseLong(string[0]);
            long end = string.length == 1 ? f.length() - 1 : Long.parseLong(string[1]);
            long length = end - start + 1;

            res.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);

            res.setHeader("Accept-Ranges", "bytes");
            res.setHeader("Content-Length", "" + length);
            res.setHeader("Content-Range", "bytes " + start + "-" + end + "/" + f.length());

            RandomAccessFile ras = null;

            try {
                ras = new RandomAccessFile(f, "r");
                ras.seek(start);
                final int chunkSize = 4096;
                byte[] buffy = new byte[chunkSize];
                int nextChunkSize = length > chunkSize ? chunkSize : (int) length;
                long bytesLeft = length;
                while (bytesLeft > 0) {
                    ras.read(buffy, 0, nextChunkSize);
                    res.getOutputStream().write(buffy, 0, nextChunkSize);
                    res.getOutputStream().flush();
                    bytesLeft = bytesLeft - nextChunkSize;
                    nextChunkSize = bytesLeft > chunkSize ? chunkSize : (int) bytesLeft;

                    /*
                     * to simulate lower bandwidth
                     */
                    /*
                    try {
                      Thread.sleep(10);
                    } catch (InterruptedException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                    }
                    */
                }
            } finally {
                if (ras != null) {
                    ras.close();
                }
            }
            return;
        }
    }

    res.setStatus(HttpServletResponse.SC_OK);
    res.setHeader("Accept-Ranges", "bytes");
    res.setContentLength((int) f.length());
    service(cms, resource, req, res);
}