Examples with CheckedOutputStream java.util.zip.CheckedOutputStream used on opensource projects

Example 6 with CheckedOutputStream

use of java.util.zip.CheckedOutputStream in project voltdb by VoltDB.

the class FileSnap method serialize.

/**
     * serialize the datatree and session into the file snapshot
     * @param dt the datatree to be serialized
     * @param sessions the sessions to be serialized
     * @param snapShot the file to store snapshot into
     */
@Override
public synchronized void serialize(DataTree dt, Map<Long, Long> sessions, File snapShot) throws IOException {
    if (!close) {
        OutputStream sessOS = new BufferedOutputStream(new FileOutputStream(snapShot));
        CheckedOutputStream crcOut = new CheckedOutputStream(sessOS, new Adler32());
        //CheckedOutputStream cout = new CheckedOutputStream()
        OutputArchive oa = BinaryOutputArchive.getArchive(crcOut);
        FileHeader header = new FileHeader(SNAP_MAGIC, VERSION, dbId);
        serialize(dt, sessions, oa, header);
        long val = crcOut.getChecksum().getValue();
        oa.writeLong(val, "val");
        oa.writeString("/", "path");
        sessOS.flush();
        crcOut.close();
        sessOS.close();
    }
}

Example 7 with CheckedOutputStream

use of java.util.zip.CheckedOutputStream in project processdash by dtuma.

the class ListingHashcodeCalculator method getListingHashcode.

/**
     * Computes a hashcode for the items in a resource collection.
     * 
     * The hashcode is sensitive to:
     * <ul>
     * <li>The names of the resources that appear both in the collection and in
     * the <code>resourceNames</code> parameter</li>
     * <li>The checksums of those files in the resource collection</li>
     * </ul>
     * 
     * Thus, if the list of resources in the collection changes, or if the
     * contents of a resource change, this hashcode is likely to change as well.
     * 
     * @param collection
     *                the resource collection to examine
     * @param resourceNames
     *                the names of resources to include in the hash
     * @return a hashcode for the names and checksums of the listed files
     */
public static long getListingHashcode(ResourceCollectionInfo collection, List<String> resourceNames) {
    String[] sortedNames = new String[resourceNames.size()];
    for (int i = 0; i < sortedNames.length; i++) {
        sortedNames[i] = resourceNames.get(i).toLowerCase();
    }
    Arrays.sort(sortedNames);
    Adler32 cksum = new Adler32();
    try {
        DataOutputStream out = new DataOutputStream(new CheckedOutputStream(NULL_OUT, cksum));
        for (String resourceName : sortedNames) {
            long lastMod = collection.getLastModified(resourceName);
            if (lastMod < 1)
                continue;
            Long checksum = collection.getChecksum(resourceName);
            if (checksum == null)
                continue;
            out.writeUTF(resourceName);
            out.writeLong(checksum);
        }
    } catch (IOException e) {
    // can't happen
    }
    return cksum.getValue();
}

Example 8 with CheckedOutputStream

use of java.util.zip.CheckedOutputStream in project elasticsearch by elastic.

the class CompressedXContent method crc32.

private static int crc32(BytesReference data) {
    OutputStream dummy = new OutputStream() {

        @Override
        public void write(int b) throws IOException {
        // no-op
        }

        @Override
        public void write(byte[] b, int off, int len) throws IOException {
        // no-op
        }
    };
    CRC32 crc32 = new CRC32();
    try {
        data.writeTo(new CheckedOutputStream(dummy, crc32));
    } catch (IOException bogus) {
        // cannot happen
        throw new Error(bogus);
    }
    return (int) crc32.getValue();
}

Example 9 with CheckedOutputStream

use of java.util.zip.CheckedOutputStream in project hadoop by apache.

the class TestIndexCache method writeFile.

private static void writeFile(FileSystem fs, Path f, long fill, int parts) throws IOException {
    FSDataOutputStream out = fs.create(f, false);
    CheckedOutputStream iout = new CheckedOutputStream(out, new CRC32());
    DataOutputStream dout = new DataOutputStream(iout);
    for (int i = 0; i < parts; ++i) {
        for (int j = 0; j < MapTask.MAP_OUTPUT_INDEX_RECORD_LENGTH / 8; ++j) {
            dout.writeLong(fill);
        }
    }
    out.writeLong(iout.getChecksum().getValue());
    dout.close();
}

Example 10 with CheckedOutputStream

use of java.util.zip.CheckedOutputStream in project jdk8u_jdk by JetBrains.

the class ZipMeUp method getManifestAsBytes.

static byte[] getManifestAsBytes(int nchars) throws IOException {
    crc.reset();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    CheckedOutputStream cos = new CheckedOutputStream(baos, crc);
    PrintStream ps = new PrintStream(cos);
    ps.println("Manifest-Version: 1.0");
    ps.print("Main-Class: ");
    for (int i = 0; i < nchars - SOME_KLASS.length(); i++) {
        ps.print(i % 10);
    }
    ps.println(SOME_KLASS);
    cos.flush();
    cos.close();
    ps.close();
    return baos.toByteArray();
}