Example usage for java.io RandomAccessFile length

Introduction

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

Prototype

public native long length() throws IOException;

Source Link

Document

Returns the length of this file.

Usage

From source file:org.xdi.util.FileUtil.java

/**
 * Writes data in a file on specified position
 * // w  w w . j  a  v  a 2s . c o  m
 * @param filePath
 * @param position
 * @param data
 * @return
 */
public boolean writeToFile(String filePath, long position, String data) {

    try {
        File f = new File(filePath);
        RandomAccessFile raf;
        raf = new RandomAccessFile(f, "rw");
        raf.seek(position);
        StringBuilder dataAfterPostion = new StringBuilder(data);
        while (raf.getFilePointer() < raf.length()) {
            String line = raf.readLine();
            dataAfterPostion.append(line);
        }
        raf.seek(position);
        raf.writeUTF(dataAfterPostion.toString());
        raf.close();
        return true;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        return false;
    } catch (IOException e) {
        e.printStackTrace();
        return false;
    }
}

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From source file:org.openengsb.connector.promreport.internal.ProcessFileStore.java

private long findLastProcess(RandomAccessFile raf) throws IOException {
    final String proc = "</Process>";
    final byte[] bproc = proc.getBytes();
    final int len = proc.length();
    for (long i = raf.length() - "</Process></WorkflowLog>".length(); i >= 0; i--) {
        byte[] buf = new byte[len];
        raf.seek(i);// w w w . java  2  s.c om
        raf.readFully(buf, 0, len);
        int b;
        for (b = 0; b < len; b++) {
            if (buf[b] != bproc[b]) {
                break;
            }
        }
        if (b == len) {
            return i;
        }
    }
    return -1;
}

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From source file:com.l2jfree.gameserver.cache.CrestCache.java

public synchronized void reload() {
    FileFilter filter = new BmpFilter();

    File dir = new File(Config.DATAPACK_ROOT, "data/crests/");

    File[] files = dir.listFiles(filter);
    if (files == null)
        files = new File[0];
    byte[] content;

    _loadedFiles = 0;// ww  w.  j  a va 2  s  .  c om
    _bytesBuffLen = 0;

    _cachePledge.clear();
    _cachePledgeLarge.clear();
    _cacheAlly.clear();

    for (File file : files) {
        RandomAccessFile f = null;
        try {
            f = new RandomAccessFile(file, "r");
            content = new byte[(int) f.length()];
            f.readFully(content);

            if (file.getName().startsWith("Crest_Large_")) {
                _cachePledgeLarge.put(
                        Integer.valueOf(file.getName().substring(12, file.getName().length() - 4)), content);
            } else if (file.getName().startsWith("Crest_")) {
                _cachePledge.put(Integer.valueOf(file.getName().substring(6, file.getName().length() - 4)),
                        content);
            } else if (file.getName().startsWith("AllyCrest_")) {
                _cacheAlly.put(Integer.valueOf(file.getName().substring(10, file.getName().length() - 4)),
                        content);
            }
            _loadedFiles++;
            _bytesBuffLen += content.length;
        } catch (Exception e) {
            _log.warn("Problem with loading crest bmp file: " + file, e);
        } finally {
            try {
                if (f != null)
                    f.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    _log.info(this);
}

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From source file:com.wondersgroup.cloud.deployment.file.FileServerHandler.java

@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
    HttpRequest request = (HttpRequest) e.getMessage();
    if (request.getMethod() != GET) {
        sendError(ctx, METHOD_NOT_ALLOWED);
        return;//w w  w. j  a v  a  2s. c o m
    }

    String srcPath = request.getHeader("srcPath");
    String ipList = request.getHeader("ipList");
    // ??app test: D:\cloud-deploy\DSC01575.JPG
    final String path = srcPath;// sanitizeUri(request.getUri()); "D:\\cloud-deploy\\AppTest.war";// 
    if (path == null) {
        sendError(ctx, FORBIDDEN);
        return;
    }

    File file = new File(path);
    if (file.isHidden() || !file.exists()) {
        sendError(ctx, NOT_FOUND);
        return;
    }
    if (!file.isFile()) {
        sendError(ctx, FORBIDDEN);
        return;
    }

    RandomAccessFile raf;
    try {
        raf = new RandomAccessFile(file, "r");
    } catch (FileNotFoundException fnfe) {
        sendError(ctx, NOT_FOUND);
        return;
    }
    long fileLength = raf.length();

    HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
    setContentLength(response, fileLength);

    response.setHeader("Content-disposition", "attachment;filename=" + file.getName());

    Channel ch = e.getChannel();

    // Write the initial line and the header.
    ch.write(response);

    // Write the content.
    ChannelFuture writeFuture;
    if (ch.getPipeline().get(SslHandler.class) != null) {
        // Cannot use zero-copy with HTTPS.
        writeFuture = ch.write(new ChunkedFile(raf, 0, fileLength, 8192));
    } else {
        // No encryption - use zero-copy.
        final FileRegion region = new DefaultFileRegion(raf.getChannel(), 0, fileLength);
        writeFuture = ch.write(region);
        writeFuture.addListener(new ChannelFutureProgressListener() {
            public void operationComplete(ChannelFuture future) {
                region.releaseExternalResources();
            }

            public void operationProgressed(ChannelFuture future, long amount, long current, long total) {
                System.out.printf("%s: %d / %d (+%d)%n", path, current, total, amount);
            }
        });
    }

    // Decide whether to close the connection or not.
    if (!isKeepAlive(request)) {
        // Close the connection when the whole content is written out.
        writeFuture.addListener(ChannelFutureListener.CLOSE);
    }
}

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From source file:ro.ieugen.fileserver.http.HttpStaticFileServerHandler.java

private HttpResponse fileDownloadResponse(File file, RandomAccessFile raf) throws IOException {
    HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
    long fileLength = raf.length();
    setContentLength(response, fileLength);
    setContentTypeHeader(response, file);
    setDateAndCacheHeaders(response, file);
    return response;
}

---

From source file:com.ibm.watson.developer_cloud.android.text_to_speech.v1.TTSUtility.java

private byte[] analyzeOpusData(InputStream is) {
    String inFilePath = getBaseDir() + "Watson.opus";
    String outFilePath = getBaseDir() + "Watson.pcm";
    File inFile = new File(inFilePath);
    File outFile = new File(outFilePath);
    outFile.deleteOnExit();/*w  w  w .  j  a va  2 s  .  c om*/
    inFile.deleteOnExit();

    try {
        RandomAccessFile inRaf = new RandomAccessFile(inFile, "rw");
        byte[] opus = IOUtils.toByteArray(is);
        inRaf.write(opus);

        sampleRate = OggOpus.decode(inFilePath, outFilePath, sampleRate); // zero means to detect the sample rate by decoder

        RandomAccessFile outRaf = new RandomAccessFile(outFile, "r");

        byte[] data = new byte[(int) outRaf.length()];

        int outLength = outRaf.read(data);

        inRaf.close();
        outRaf.close();
        if (outLength == 0) {
            throw new IOException("Data reading failed");
        }
        return data;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return new byte[0];
}

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From source file:org.apache.tajo.HttpFileServerHandler.java

@Override
public void channelRead0(ChannelHandlerContext ctx, FullHttpRequest request) throws Exception {

    if (request.getMethod() != HttpMethod.GET) {
        sendError(ctx, HttpResponseStatus.METHOD_NOT_ALLOWED);
        return;//  w w w .  j  a  v  a 2 s. c o m
    }

    final String path = sanitizeUri(request.getUri());
    if (path == null) {
        sendError(ctx, HttpResponseStatus.FORBIDDEN);
        return;
    }

    File file = new File(path);
    if (file.isHidden() || !file.exists()) {
        sendError(ctx, HttpResponseStatus.NOT_FOUND);
        return;
    }
    if (!file.isFile()) {
        sendError(ctx, HttpResponseStatus.FORBIDDEN);
        return;
    }

    RandomAccessFile raf;
    try {
        raf = new RandomAccessFile(file, "r");
    } catch (FileNotFoundException fnfe) {
        sendError(ctx, HttpResponseStatus.NOT_FOUND);
        return;
    }
    long fileLength = raf.length();

    HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
    HttpHeaders.setContentLength(response, fileLength);
    setContentTypeHeader(response);

    // Write the initial line and the header.
    ctx.write(response);

    // Write the content.
    ChannelFuture writeFuture;
    ChannelFuture lastContentFuture;
    if (ctx.pipeline().get(SslHandler.class) != null) {
        // Cannot use zero-copy with HTTPS.
        lastContentFuture = ctx.writeAndFlush(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, 8192)),
                ctx.newProgressivePromise());
    } else {
        // No encryption - use zero-copy.
        final FileRegion region = new DefaultFileRegion(raf.getChannel(), 0, fileLength);
        writeFuture = ctx.write(region, ctx.newProgressivePromise());
        lastContentFuture = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
        writeFuture.addListener(new ChannelProgressiveFutureListener() {
            @Override
            public void operationProgressed(ChannelProgressiveFuture future, long progress, long total)
                    throws Exception {
                LOG.trace(String.format("%s: %d / %d", path, progress, total));
            }

            @Override
            public void operationComplete(ChannelProgressiveFuture future) throws Exception {
                LOG.trace(future.channel() + " Transfer complete.");
            }
        });
    }

    // Decide whether to close the connection or not.
    if (!HttpHeaders.isKeepAlive(request)) {
        // Close the connection when the whole content is written out.
        lastContentFuture.addListener(ChannelFutureListener.CLOSE);
    }
}

---

From source file:org.jraf.irondad.handler.pixgame.PixGameHandler.java

public String getRandomWord(HandlerContext handlerContext) throws IOException {
    RandomAccessFile file = new RandomAccessFile(
            ((PixGameHandlerConfig) handlerContext.getHandlerConfig()).getDictPath(), "r");
    file.seek((long) (Math.random() * file.length()));
    // Eat the characters of the current line to go to beginning of the next line
    file.readLine();/*from w  ww . ja va2  s .co m*/
    // Now read and return the line
    return file.readLine();
}

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From source file:hydrograph.ui.perspective.dialog.PreStartActivity.java

private boolean updateINIFile(String javaHome) {
    logger.debug("Updating JAVA_HOME in ini file ::" + javaHome);
    javaHome = "-vm\n" + javaHome + "\n";
    RandomAccessFile file = null;
    boolean isUpdated = false;
    try {/* ww  w.ja  v a2  s  .  c om*/
        file = new RandomAccessFile(new File(HYDROGRAPH_INI), "rw");
        byte[] text = new byte[(int) file.length()];
        file.readFully(text);
        file.seek(0);
        file.writeBytes(javaHome);
        file.write(text);
        isUpdated = true;
    } catch (IOException ioException) {
        logger.error("IOException occurred while updating " + HYDROGRAPH_INI + " file", ioException);
    } finally {
        try {
            if (file != null) {
                file.close();
            }
        } catch (IOException ioException) {
            logger.error("IOException occurred while updating " + HYDROGRAPH_INI + " file", ioException);
        }
    }
    return isUpdated;
}

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From source file:at.tuwien.minimee.util.TopParser.java

/**
 * The process ID is in the last line of the file and looks like follows:
 * monitored_pid= 6738 /*from w  w  w  . j  a va2  s .com*/
 * 
 * @param input
 * @return
 * @throws Exception
 */
private Integer findPid() throws Exception {

    Integer pid = new Integer(0);

    // we open the file
    RandomAccessFile f = new RandomAccessFile(file, "r");

    try {

        long size = f.length();

        f.seek(size - 2);

        // we search the file reverse for '='
        byte[] b = new byte[1];
        for (long i = size - 2; i >= 0; i--) {
            f.seek(i);
            f.read(b);
            if (b[0] == '=') {
                break;
            }
        }

        String line = f.readLine().trim();

        pid = new Integer(line);

    } finally {
        // this is important, RandomAccessFile doesn't close the file handle by default!
        // if close isn't called, you'll get very soon 'too many open files'
        f.close();
    }

    return pid;
}

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