Example usage for java.io RandomAccessFile setLength

Introduction

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

Prototype

public native void setLength(long newLength) throws IOException;

Source Link

Document

Sets the length of this file.

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!");
    }/*from  w ww  . ja va  2 s  . co 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) {
            MLoger.debug("Error occured when calling consumingContent");
        }
        tmpFileRaf.close();
    }
    return null;
}

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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!");
    }/*from ww w .  j a va  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) {
            KJLoger.debug("Error occured when calling consumingContent");
        }
        tmpFileRaf.close();
    }
    return null;
}

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From source file:com.btoddb.fastpersitentqueue.JournalFileTest.java

@Test
public void testInvalidUUID() throws Exception {
    // can't actuall write an invalid UUID because it's made of two variable length longs
    // only way to get an invalid UUID is to have a truncated file
    JournalFile jf1 = new JournalFile(theFile);
    jf1.initForWriting(new UUID());
    jf1.close();/*from w w  w .  j a  va 2  s .  c  om*/

    // mess up the UUID
    RandomAccessFile raFile = new RandomAccessFile(theFile, "rw");
    Utils.writeInt(raFile, 1);
    Utils.writeInt(raFile, -1);
    raFile.setLength(raFile.getFilePointer());
    raFile.close();
    //        Utils.writeLong(raFile, numberOfEntries.get());

    JournalFile jf2 = new JournalFile(theFile);
    try {
        jf2.initForReading();
        fail("should have found invalid UUID in the form of truncated file");
    } catch (EOFException e) {
        // good!
    }
}

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From source file:org.waveprotocol.box.server.persistence.file.DeltaStoreTest.java

public void testRecoverFromTruncatedDeltas() throws Exception {
    // Create an entry with one record. Shrink the file byte by byte and ensure
    // we can read it without crashing.
    DeltaStore store = newDeltaStore();/*from ww w.  jav a  2 s.  c  o m*/
    WaveletDeltaRecord written = createRecord();
    File deltaFile = FileDeltaCollection.deltasFile(path.getAbsolutePath(), WAVE1_WAVELET1);

    long toRemove = 1;
    while (true) {
        // This generates the full file.
        DeltasAccess wavelet = store.open(WAVE1_WAVELET1);
        wavelet.append(ImmutableList.of(written));
        wavelet.close();

        RandomAccessFile file = new RandomAccessFile(deltaFile, "rw");
        if (toRemove > file.length()) {
            file.close();
            break;
        }
        // eat the planned number of bytes
        LOG.info("trying to remove " + toRemove + " bytes");
        file.setLength(file.length() - toRemove);
        file.close();

        wavelet = store.open(WAVE1_WAVELET1);
        WaveletDeltaRecord read = wavelet.getDelta(0);
        assertNull("got an unexpected record " + read, read);
        wavelet.close();
        toRemove++;
    }
}

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

private void updateData(byte[] text, String javaHome, String end, RandomAccessFile file) throws IOException {
    String data = new String(text);
    data = StringUtils.replace(data, end, javaHome);
    file.setLength(data.length());
    file.writeBytes(data);/*  w ww  .j av a2  s  . c om*/
}

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From source file:org.apache.hadoop.hdfs.server.namenode.TestFSEditLogLoader.java

/**
 * Truncate the given file to the given length
 *///from   www .  j a va  2s  . com
private void truncateFile(File logFile, long newLength) throws IOException {
    RandomAccessFile raf = new RandomAccessFile(logFile, "rw");
    raf.setLength(newLength);
    raf.close();
}

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From source file:com.adaptris.core.fs.NonDeletingFsConsumerTest.java

private void resize(List<File> files) throws IOException {
    for (File f : files) {
        long currentSize = f.length();
        RandomAccessFile raf = new RandomAccessFile(f, "rwd");
        try {/*from  ww  w. j  a  v a 2 s  . c  o  m*/
            raf.setLength(currentSize + 1);
        } finally {
            raf.close();
        }
    }
}

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From source file:org.apache.hcatalog.pig.TestHCatLoader.java

@Test
public void testGetInputBytes() throws Exception {
    File file = new File(TEST_WAREHOUSE_DIR + "/" + SPECIFIC_SIZE_TABLE + "/part-m-00000");
    file.deleteOnExit();//from  w ww.  j  a va  2 s.  c  o  m
    RandomAccessFile randomAccessFile = new RandomAccessFile(file, "rw");
    randomAccessFile.setLength(2L * 1024 * 1024 * 1024);
    randomAccessFile.close();
    Job job = new Job();
    HCatLoader hCatLoader = new HCatLoader();
    hCatLoader.setUDFContextSignature("testGetInputBytes");
    hCatLoader.setLocation(SPECIFIC_SIZE_TABLE, job);
    ResourceStatistics statistics = hCatLoader.getStatistics(file.getAbsolutePath(), job);
    assertEquals(2048, (long) statistics.getmBytes());
}

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From source file:com.example.android.vault.EncryptedDocument.java

/**
 * Encrypt and write both the metadata and content sections of this
 * document, reading the content from the given pipe. Internally uses
 * {@link ParcelFileDescriptor#checkError()} to verify that content arrives
 * without errors. Writes to temporary file to keep atomic view of contents,
 * swapping into place only when write is successful.
 * <p/>// w ww .  ja  va2 s  .  c om
 * Pipe is left open, so caller is responsible for calling
 * {@link ParcelFileDescriptor#close()} or
 * {@link ParcelFileDescriptor#closeWithError(String)}.
 *
 * @param contentIn read end of a pipe.
 */
public void writeMetadataAndContent(JSONObject meta, ParcelFileDescriptor contentIn)
        throws IOException, GeneralSecurityException {
    // Write into temporary file to provide an atomic view of existing
    // contents during write, and also to recover from failed writes.
    final String tempName = mFile.getName() + ".tmp_" + Thread.currentThread().getId();
    final File tempFile = new File(mFile.getParentFile(), tempName);

    RandomAccessFile f = new RandomAccessFile(tempFile, "rw");
    try {
        // Truncate any existing data
        f.setLength(0);

        // Write content first to detect size
        if (contentIn != null) {
            f.seek(CONTENT_OFFSET);
            final int plainLength = writeSection(f, new FileInputStream(contentIn.getFileDescriptor()));
            meta.put(Document.COLUMN_SIZE, plainLength);

            // Verify that remote side of pipe finished okay; if they
            // crashed or indicated an error then this throws and we
            // leave the original file intact and clean up temp below.
            contentIn.checkError();
        }

        meta.put(Document.COLUMN_DOCUMENT_ID, mDocId);
        meta.put(Document.COLUMN_LAST_MODIFIED, System.currentTimeMillis());

        // Rewind and write metadata section
        f.seek(0);
        f.writeInt(MAGIC_NUMBER);

        final ByteArrayInputStream metaIn = new ByteArrayInputStream(
                meta.toString().getBytes(StandardCharsets.UTF_8));
        writeSection(f, metaIn);

        if (f.getFilePointer() > CONTENT_OFFSET) {
            throw new IOException("Metadata section was too large");
        }

        // Everything written fine, atomically swap new data into place.
        // fsync() before close would be overkill, since rename() is an
        // atomic barrier.
        f.close();
        tempFile.renameTo(mFile);

    } catch (JSONException e) {
        throw new IOException(e);
    } finally {
        // Regardless of what happens, always try cleaning up.
        f.close();
        tempFile.delete();
    }
}

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From source file:jp.andeb.obbutil.ObbUtilMain.java

private static boolean doAdd(String[] args) {
    final CommandLine commandLine;
    try {/*from  w  w w.ja v  a2  s  . c  o  m*/
        final CommandLineParser parser = new GnuParser();
        commandLine = parser.parse(OPTIONS_FOR_ADD, args);
    } catch (MissingArgumentException e) {
        System.err.println("??????: " + e.getOption().getOpt());
        printUsage(PROGNAME);
        return false;
    } catch (MissingOptionException e) {
        System.err.println("??????: " + e.getMissingOptions());
        printUsage(PROGNAME);
        return false;
    } catch (UnrecognizedOptionException e) {
        System.err.println("????: " + e.getOption());
        printUsage(PROGNAME);
        return false;
    } catch (ParseException e) {
        System.err.println(e.getMessage());
        printUsage(PROGNAME);
        return false;
    }

    final String pkgName = commandLine.getOptionValue(PACKAGE_NAME.getOpt());
    final String versionStr = commandLine.getOptionValue(OBB_VERSION.getOpt());
    final Integer version = toInteger(versionStr);
    if (version == null) {
        System.err.println("??????: " + versionStr);
        printUsage(PROGNAME);
        return false;
    }
    final boolean isOverlay = commandLine.hasOption(OVERLAY_FLAG.getOpt());
    final String saltStr = commandLine.getOptionValue(SALT.getOpt());
    final byte[] salt;
    if (saltStr == null) {
        salt = null;
    } else {
        salt = toByteArray(saltStr, ObbInfoV1.SALT_LENGTH);
        if (salt == null) {
            System.err.println("????: " + saltStr);
            printUsage(PROGNAME);
            return false;
        }
    }

    final String[] nonRecognizedArgs = commandLine.getArgs();
    if (nonRecognizedArgs.length == 0) {
        System.err.println("????????");
        printUsage(PROGNAME);
        return false;
    }
    if (nonRecognizedArgs.length != 1) {
        System.err.println("???????");
        printUsage(PROGNAME);
        return false;
    }

    final File targetFile = new File(nonRecognizedArgs[0]);
    final RandomAccessFile targetRaFile;
    try {
        targetRaFile = new RandomAccessFile(targetFile, "rw");
    } catch (FileNotFoundException e) {
        System.err.println("????: " + targetFile.getPath());
        return false;
    }
    try {
        try {
            final ObbInfoV1 info = ObbInfoV1.fromFile(targetRaFile);
            System.err.println(
                    "?? OBB ???????: " + info.toString());
            return false;
        } catch (IOException e) {
            System.err
                    .println("????????: " + targetFile.getPath());
            return false;
        } catch (NotObbException e) {
            // 
        }

        int flag = 0;
        if (isOverlay) {
            flag |= ObbInfoV1.FLAG_OVERLAY;
        }
        if (salt != null) {
            flag |= ObbInfoV1.FLAG_SALTED;
        }
        final ObbInfoV1 obbInfo = new ObbInfoV1(flag, salt, pkgName, version.intValue());
        final ByteBuffer obbInfoBytes = obbInfo.toBytes();
        // ???
        targetRaFile.setLength(targetRaFile.length() + obbInfoBytes.remaining());
        targetRaFile.seek(targetRaFile.length() - obbInfoBytes.remaining());
        targetRaFile.write(obbInfoBytes.array(), obbInfoBytes.arrayOffset(), obbInfoBytes.remaining());
    } catch (IOException e) {
        System.err.println("OBB ?????????: " + targetFile.getPath());
        return false;
    } finally {
        try {
            targetRaFile.close();
        } catch (IOException e) {
            System.err.println("OBB ?????????: " + targetFile.getPath());
            return false;
        }
    }
    System.err.println("OBB ??????????: " + targetFile.getPath());
    return true;
}

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