Example usage for java.nio.channels FileChannel size

Introduction

In this page you can find the example usage for java.nio.channels FileChannel size.

Prototype

public abstract long size() throws IOException;

Source Link

Document

Returns the current size of this channel's file.

Usage

From source file:org.oscarehr.document.web.ManageDocumentAction.java

public File createCacheVersion(Document d, int pageNum) throws Exception {

    File documentCacheDir = new File(EDocUtil.getCacheDirectory());
    File file = new File(EDocUtil.getDocumentPath(d.getDocfilename()));

    RandomAccessFile raf = new RandomAccessFile(file, "r");
    FileChannel channel = raf.getChannel();
    ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
    PDFFile pdffile = new PDFFile(buf);
    if (raf != null)
        raf.close();//www.  j a v a2s.  c  o m
    if (channel != null)
        channel.close();
    // draw the first page to an image
    PDFPage ppage = pdffile.getPage(pageNum);

    log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

    // get the width and height for the doc at the default zoom
    Rectangle rect = new Rectangle(0, 0, (int) ppage.getBBox().getWidth(), (int) ppage.getBBox().getHeight());

    log.debug("generate the image");
    Image img = ppage.getImage(rect.width, rect.height, // width & height
            rect, // clip rect
            null, // null for the ImageObserver
            true, // fill background with white
            true // block until drawing is done
    );

    log.debug("about to Print to stream");
    File outfile = new File(documentCacheDir, d.getDocfilename() + "_" + pageNum + ".png");

    OutputStream outs = null;
    try {
        outs = new FileOutputStream(outfile);

        RenderedImage rendImage = (RenderedImage) img;
        ImageIO.write(rendImage, "png", outs);
        outs.flush();
    } finally {
        if (outs != null)
            outs.close();
    }
    return outfile;

}

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From source file:com.splout.db.dnode.Fetcher.java

/**
 * In case of interrupted, written file is not deleted.
 *//*from  ww  w  .jav a2s  .co m*/
private void copyFile(File sourceFile, File destFile, Reporter reporter)
        throws IOException, InterruptedException {
    if (!destFile.exists()) {
        destFile.createNewFile();
    }
    FileChannel source = null;
    FileChannel destination = null;

    Throttler throttler = new Throttler((double) bytesPerSecThrottle);

    FileInputStream iS = null;
    FileOutputStream oS = null;

    try {
        iS = new FileInputStream(sourceFile);
        oS = new FileOutputStream(destFile);
        source = iS.getChannel();
        destination = oS.getChannel();
        long bytesSoFar = 0;
        long reportingBytesSoFar = 0;
        long size = source.size();

        int transferred = 0;

        while (bytesSoFar < size) {
            // Needed to being able to be interrupted at any moment.
            if (Thread.interrupted()) {
                throw new InterruptedException();
            }

            // Casting to int here is safe since we will transfer at most "downloadBufferSize" bytes.
            // This is done on purpose for being able to implement Throttling.
            transferred = (int) destination.transferFrom(source, bytesSoFar, downloadBufferSize);
            bytesSoFar += transferred;
            reportingBytesSoFar += transferred;
            throttler.incrementAndThrottle(transferred);
            if (reportingBytesSoFar >= bytesToReportProgress) {
                reporter.progress(reportingBytesSoFar);
                reportingBytesSoFar = 0l;
            }
        }

        if (reporter != null) {
            reporter.progress(reportingBytesSoFar);
        }

    } catch (InterruptedException e) {
        e.printStackTrace();
    } finally {
        if (iS != null) {
            iS.close();
        }
        if (oS != null) {
            oS.close();
        }
        if (source != null) {
            source.close();
        }
        if (destination != null) {
            destination.close();
        }
    }
}

---

From source file:org.oscarehr.document.web.ManageDocumentAction.java

public ActionForward view2(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response) throws Exception {

    // TODO: NEED TO CHECK FOR ACCESS
    String doc_no = request.getParameter("doc_no");
    log.debug("Document No :" + doc_no);

    LogAction.addLog((String) request.getSession().getAttribute("user"), LogConst.READ, LogConst.CON_DOCUMENT,
            doc_no, request.getRemoteAddr());

    Document d = documentDAO.getDocument(doc_no);
    log.debug("Document Name :" + d.getDocfilename());

    // TODO: Right now this assumes it's a pdf which it shouldn't

    response.setContentType("image/png");
    // response.setHeader("Content-Disposition", "attachment;filename=\"" + filename+ "\"");
    // read the file name.
    File file = new File(EDocUtil.getDocumentPath(d.getDocfilename()));

    RandomAccessFile raf = new RandomAccessFile(file, "r");
    FileChannel channel = raf.getChannel();
    ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
    PDFFile pdffile = new PDFFile(buf);
    // draw the first page to an image
    PDFPage ppage = pdffile.getPage(0);/*from  w  w  w .j a v  a2  s  . co  m*/

    log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

    // get the width and height for the doc at the default zoom
    Rectangle rect = new Rectangle(0, 0, (int) ppage.getBBox().getWidth(), (int) ppage.getBBox().getHeight());

    log.debug("generate the image");
    Image img = ppage.getImage(rect.width, rect.height, // width & height
            rect, // clip rect
            null, // null for the ImageObserver
            true, // fill background with white
            true // block until drawing is done
    );

    log.debug("about to Print to stream");
    ServletOutputStream outs = response.getOutputStream();

    RenderedImage rendImage = (RenderedImage) img;
    ImageIO.write(rendImage, "png", outs);
    outs.flush();
    outs.close();
    return null;
}

---

From source file:dk.netarkivet.common.utils.FileUtils.java

/**
 * Copy file from one location to another. Will silently overwrite an
 * already existing file.//from w w  w  .java2 s.c  o  m
 *
 * @param from
 *            original to copy
 * @param to
 *            destination of copy
 * @throws IOFailure if an io error occurs while copying file,
 * or the original file does not exist.
 */
public static void copyFile(File from, File to) {
    ArgumentNotValid.checkNotNull(from, "File from");
    ArgumentNotValid.checkNotNull(to, "File to");
    if (!from.exists()) {
        String errMsg = "Original file '" + from.getAbsolutePath() + "' does not exist";
        log.warn(errMsg);
        throw new IOFailure(errMsg);
    }
    try {
        FileInputStream inStream = null;
        FileOutputStream outStream = null;
        FileChannel in = null;
        FileChannel out = null;
        try {
            inStream = new FileInputStream(from);
            outStream = new FileOutputStream(to);
            in = inStream.getChannel();
            out = outStream.getChannel();
            long bytesTransferred = 0;
            do {
                //Note: in.size() is called every loop, because if it should
                //change size, we might end up in an infinite loop trying to
                //copy more bytes than are actually available.
                bytesTransferred += in.transferTo(bytesTransferred,
                        Math.min(Constants.IO_CHUNK_SIZE, in.size() - bytesTransferred), out);
            } while (bytesTransferred < in.size());
        } finally {
            if (inStream != null) {
                inStream.close();
            }
            if (outStream != null) {
                outStream.close();
            }
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
        }
    } catch (IOException e) {
        final String errMsg = "Error copying file '" + from.getAbsolutePath() + "' to '" + to.getAbsolutePath()
                + "'";
        log.warn(errMsg, e);
        throw new IOFailure(errMsg, e);
    }
}

---

From source file:com.liferay.portal.util.FileImpl.java

public boolean isSameContent(File file, byte[] bytes, int length) {
    FileChannel fileChannel = null;

    try {//from  w  w w  .  j  a v  a2 s  .c o  m
        FileInputStream fileInputStream = new FileInputStream(file);

        fileChannel = fileInputStream.getChannel();

        if (fileChannel.size() != length) {
            return false;
        }

        byte[] buffer = new byte[1024];

        ByteBuffer byteBuffer = ByteBuffer.wrap(buffer);

        int bufferIndex = 0;
        int bufferLength = -1;

        while (((bufferLength = fileChannel.read(byteBuffer)) > 0) && (bufferIndex < length)) {

            for (int i = 0; i < bufferLength; i++) {
                if (buffer[i] != bytes[bufferIndex++]) {
                    return false;
                }
            }

            byteBuffer.clear();
        }

        if ((bufferIndex != length) || (bufferLength != -1)) {
            return false;
        } else {
            return true;
        }
    } catch (Exception e) {
        return false;
    } finally {
        if (fileChannel != null) {
            try {
                fileChannel.close();
            } catch (IOException ioe) {
            }
        }
    }
}

---

From source file:eu.medsea.mimeutil.detector.OpendesktopMimeDetector.java

private void init(final String mimeCacheFile) {
    String cacheFile = mimeCacheFile;
    if (!new File(cacheFile).exists()) {
        cacheFile = internalMimeCacheFile;

    }//from  w  ww  .  j a v  a 2s  . c  om
    // Map the mime.cache file as a memory mapped file
    FileChannel rCh = null;
    try {
        RandomAccessFile raf = null;
        raf = new RandomAccessFile(cacheFile, "r");
        rCh = (raf).getChannel();
        content = rCh.map(FileChannel.MapMode.READ_ONLY, 0, rCh.size());

        // Read all of the MIME type from the Alias list
        initMimeTypes();

        if (log.isDebugEnabled()) {
            log.debug("Registering a FileWatcher for [" + cacheFile + "]");
        }
        TimerTask task = new FileWatcher(new File(cacheFile)) {
            protected void onChange(File file) {
                initMimeTypes();
            }
        };

        timer = new Timer();
        // repeat the check every 10 seconds
        timer.schedule(task, new Date(), 10000);

    } catch (Exception e) {
        throw new MimeException(e);
    } finally {
        if (rCh != null) {
            try {
                rCh.close();
            } catch (Exception e) {
                log.error(e.getLocalizedMessage(), e);
            }
        }
    }
}

---

From source file:edu.harvard.iq.dvn.ingest.dsb.DSBWrapper.java

public String ingest(StudyFileEditBean file) throws IOException {
    dbgLog.fine("***** DSBWrapper: ingest(): start *****\n");

    String ddi = null;/*from  w ww  .j a  v a2  s. c  o m*/

    BufferedInputStream infile = null;

    // ingest-source file
    File tempFile = new File(file.getTempSystemFileLocation());
    SDIOData sd = null;

    if (file.getControlCardSystemFileLocation() == null) {
        // A "classic", 1 file ingest:        

        String mime_type = file.getStudyFile().getFileType();

        infile = new BufferedInputStream(new FileInputStream(tempFile));

        dbgLog.info("\nfile mimeType=" + mime_type + "\n\n");

        // get available FileReaders for this MIME-type
        Iterator<StatDataFileReader> itr = StatDataIO.getStatDataFileReadersByMIMEType(mime_type);

        if (itr.hasNext()) {
            // use the first Subsettable data reader
            StatDataFileReader sdioReader = itr.next();

            dbgLog.info("reader class name=" + sdioReader.getClass().getName());

            if (mime_type != null) {
                String requestedCharacterEncoding = file.getDataLanguageEncoding();
                if (requestedCharacterEncoding != null) {
                    dbgLog.fine("Will try to process the file assuming that the character strings are "
                            + "encoded in " + requestedCharacterEncoding);
                    sdioReader.setDataLanguageEncoding(requestedCharacterEncoding);
                }
                sd = sdioReader.read(infile, null);
            } else {
                // fail-safe block if mime_type is null
                // check the format type again and then read the file
                dbgLog.info("mime-type was null: use the back-up method");
                sd = StatDataIO.read(infile, null);
            }
        } else {

            throw new IllegalArgumentException(
                    "No FileReader Class found" + " for this mime type=" + mime_type);
        }
    } else {
        // This is a 2-file ingest.
        // As of now, there are 2 supported methods: 
        // 1. CSV raw data file + SPSS control card;
        // 2. TAB raw data file + DDI control card;
        // NOTE, that "POR file with the Extended Labels" is NOT a 2-file.
        // control card-based ingest! Rather, we ingest the file as a regular
        // SPSS/POR dataset, then modify the variable labels in the resulting
        // TabularFile. 

        File rawDataFile = tempFile;

        infile = new BufferedInputStream(new FileInputStream(file.getControlCardSystemFileLocation()));

        String controlCardType = file.getControlCardType();

        if (controlCardType == null || controlCardType.equals("")) {
            dbgLog.info("No Control Card Type supplied.");

            throw new IllegalArgumentException("No Control Card Type supplied.");
        }

        Iterator<StatDataFileReader> itr = StatDataIO.getStatDataFileReadersByFormatName(controlCardType);

        if (!itr.hasNext()) {
            dbgLog.info("No FileReader class found for " + controlCardType + ".");

            throw new IllegalArgumentException("No FileReader Class found for " + controlCardType + ".");
        }

        StatDataFileReader sdioReader = itr.next();

        dbgLog.info("reader class name=" + sdioReader.getClass().getName());

        sd = sdioReader.read(infile, rawDataFile);

    }

    if (sd != null) {
        SDIOMetadata smd = sd.getMetadata();

        // tab-file: source file
        String tabDelimitedDataFileLocation = smd.getFileInformation().get("tabDelimitedDataFileLocation")
                .toString();

        dbgLog.fine("tabDelimitedDataFileLocation=" + tabDelimitedDataFileLocation);

        dbgLog.fine("data file(tempFile): abs path:\n" + file.getTempSystemFileLocation());
        dbgLog.fine("mimeType :\n" + file.getStudyFile().getFileType());

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

        // parse the response
        StudyFile f = file.getStudyFile();

        // first, check dir
        // create a sub-directory "ingested"
        File newDir = new File(tempFile.getParentFile(), "ingested");

        if (!newDir.exists()) {
            newDir.mkdirs();
        }
        dbgLog.fine("newDir: abs path:\n" + newDir.getAbsolutePath());

        // tab-file case: destination
        File newFile = new File(newDir, tempFile.getName());

        // nio-based file-copying idiom
        FileInputStream fis = new FileInputStream(tabDelimitedDataFileLocation);
        FileOutputStream fos = new FileOutputStream(newFile);
        FileChannel fcin = fis.getChannel();
        FileChannel fcout = fos.getChannel();
        fcin.transferTo(0, fcin.size(), fcout);
        fcin.close();
        fcout.close();
        fis.close();
        fos.close();

        dbgLog.fine("newFile: abs path:\n" + newFile.getAbsolutePath());

        // store the tab-file location
        file.setIngestedSystemFileLocation(newFile.getAbsolutePath());

        // finally, if we have an extended variable map, let's replace the 
        // labels that have been found in the data file: 

        if (file.getExtendedVariableLabelMap() != null) {
            for (String varName : file.getExtendedVariableLabelMap().keySet()) {
                if (smd.getVariableLabel().containsKey(varName)) {
                    smd.getVariableLabel().put(varName, file.getExtendedVariableLabelMap().get(varName));
                }
            }
        }

        // return xmlToParse;
        DDIWriter dw = new DDIWriter(smd);
        ddi = dw.generateDDI();

        return ddi;
    }
    return null;
}

---

From source file:org.t3.metamediamanager.MediaCenterDataMediaBrowser.java

/**
 * use for copy images given in an array in a folder given in parameters
 * @param images//ww w  .j  av a 2  s. com
 * @param newFileName
 */
public void copy_images(String images, String newFileName) {

    FileChannel in = null; // canal d'entre
    FileChannel out = null; // canal de sortie
    try {
        // Init
        in = new FileInputStream(images).getChannel();
        out = new FileOutputStream(newFileName).getChannel();

        // Copy in->out
        in.transferTo(0, in.size(), out);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        if (out != null) {
            try {
                out.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

}

---

From source file:edu.ucsb.eucalyptus.storage.fs.FileSystemStorageManager.java

public void copyObject(String sourceBucket, String sourceObject, String destinationBucket,
        String destinationObject) throws IOException {
    File oldObjectFile = new File(
            rootDirectory + FILE_SEPARATOR + sourceBucket + FILE_SEPARATOR + sourceObject);
    File newObjectFile = new File(
            rootDirectory + FILE_SEPARATOR + destinationBucket + FILE_SEPARATOR + destinationObject);
    if (!oldObjectFile.equals(newObjectFile)) {
        FileInputStream fileInputStream = null;
        FileChannel fileIn = null;
        FileOutputStream fileOutputStream = null;
        FileChannel fileOut = null;
        try {/*from   w ww.  java 2  s.  com*/
            fileInputStream = new FileInputStream(oldObjectFile);
            fileIn = fileInputStream.getChannel();
            fileOutputStream = new FileOutputStream(newObjectFile);
            fileOut = fileOutputStream.getChannel();
            fileIn.transferTo(0, fileIn.size(), fileOut);
        } finally {
            if (fileIn != null)
                fileIn.close();
            if (fileInputStream != null)
                fileInputStream.close();
            if (fileOut != null)
                fileOut.close();
            if (fileOutputStream != null)
                fileOutputStream.close();
        }
    }
}

---

From source file:com.edgenius.wiki.service.impl.SitemapServiceImpl.java

private void appendSitemapIndex(String sitemap) throws IOException {
    File sitemapIndexFile = new File(mapResourcesRoot.getFile(), SITEMAP_INDEX_NAME);
    if (!sitemapIndexFile.exists()) {
        //if a new sitemap file
        List<String> lines = new ArrayList<String>();
        lines.add("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
        lines.add("<sitemapindex xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">");
        lines.add("</sitemapindex>");
        FileUtils.writeLines(sitemapIndexFile, lines);
    }//  w w  w  .  j a  v  a2s .com

    RandomAccessFile rfile = new RandomAccessFile(sitemapIndexFile, "rw");
    FileChannel channel = rfile.getChannel();

    //this new content will append to end of file before XML end tag
    StringBuilder lines = new StringBuilder();
    lines.append("   <sitemap>\n");
    lines.append("     <loc>" + WebUtil.getHostAppURL() + SITEMAP_URL_CONTEXT + sitemap + "</loc>\n");
    lines.append("     <lastmod>" + TIME_FORMAT.format(new Date()) + " </lastmod>\n");
    lines.append("   </sitemap>\n");
    //the last tag will be overwrite, so append it again to new content. 
    lines.append(SITEMAP_INDEX_TAIL_FLAG);
    byte[] content = lines.toString().getBytes();

    ByteBuffer byteBuf = ByteBuffer.allocate(512);
    // seek first
    int len = 0, headIdx = 0;
    long tailIdx = channel.size() - 512;
    tailIdx = tailIdx < 0 ? 0 : tailIdx;

    long headPos = -1;
    StringBuilder header = new StringBuilder();
    while ((len = channel.read(byteBuf, tailIdx)) > 0) {
        byteBuf.rewind();
        byte[] dst = new byte[len];
        byteBuf.get(dst, 0, len);
        header.append(new String(dst, "UTF8"));
        headIdx = header.indexOf(SITEMAP_INDEX_TAIL_FLAG);
        if (headIdx != -1) {
            headPos = channel.size() - header.substring(headIdx).getBytes().length;
            break;
        }
    }
    FileLock lock = channel.tryLock(headPos, content.length, false);
    try {
        channel.write(ByteBuffer.wrap(content), headPos);
    } finally {
        lock.release();
    }

    channel.force(false);
    rfile.close();

}

---

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