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

Example 16 with CheckedInputStream

use of java.util.zip.CheckedInputStream in project android_frameworks_base by ResurrectionRemix.

the class FileUtils method checksumCrc32.

/**
     * Computes the checksum of a file using the CRC32 checksum routine.
     * The value of the checksum is returned.
     *
     * @param file  the file to checksum, must not be null
     * @return the checksum value or an exception is thrown.
     */
public static long checksumCrc32(File file) throws FileNotFoundException, IOException {
    CRC32 checkSummer = new CRC32();
    CheckedInputStream cis = null;
    try {
        cis = new CheckedInputStream(new FileInputStream(file), checkSummer);
        byte[] buf = new byte[128];
        while (cis.read(buf) >= 0) {
        // Just read for checksum to get calculated.
        }
        return checkSummer.getValue();
    } finally {
        if (cis != null) {
            try {
                cis.close();
            } catch (IOException e) {
            }
        }
    }
}

Example 17 with CheckedInputStream

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

the class FileSnap method deserialize.

/**
     * deserialize a data tree from the most recent snapshot
     * @return the zxid of the snapshot
     */
@Override
public long deserialize(DataTree dt, Map<Long, Long> sessions) throws IOException {
    // we run through 100 snapshots (not all of them)
    // if we cannot get it running within 100 snapshots
    // we should  give up
    List<File> snapList = findNValidSnapshots(100);
    if (snapList.size() == 0) {
        return -1L;
    }
    File snap = null;
    boolean foundValid = false;
    for (int i = 0; i < snapList.size(); i++) {
        snap = snapList.get(i);
        InputStream snapIS = null;
        CheckedInputStream crcIn = null;
        try {
            LOG.info("Reading snapshot " + snap);
            snapIS = new BufferedInputStream(new FileInputStream(snap));
            crcIn = new CheckedInputStream(snapIS, new Adler32());
            InputArchive ia = BinaryInputArchive.getArchive(crcIn);
            deserialize(dt, sessions, ia);
            long checkSum = crcIn.getChecksum().getValue();
            long val = ia.readLong("val");
            if (val != checkSum) {
                throw new IOException("CRC corruption in snapshot :  " + snap);
            }
            foundValid = true;
            break;
        } catch (IOException e) {
            LOG.warn("problem reading snap file " + snap, e);
        } finally {
            if (snapIS != null)
                snapIS.close();
            if (crcIn != null)
                crcIn.close();
        }
    }
    if (!foundValid) {
        throw new IOException("Not able to find valid snapshots in " + snapDir);
    }
    dt.lastProcessedZxid = Util.getZxidFromName(snap.getName(), "snapshot");
    return dt.lastProcessedZxid;
}

Example 18 with CheckedInputStream

use of java.util.zip.CheckedInputStream in project android_frameworks_base by crdroidandroid.

the class FileUtils method checksumCrc32.

/**
     * Computes the checksum of a file using the CRC32 checksum routine.
     * The value of the checksum is returned.
     *
     * @param file  the file to checksum, must not be null
     * @return the checksum value or an exception is thrown.
     */
public static long checksumCrc32(File file) throws FileNotFoundException, IOException {
    CRC32 checkSummer = new CRC32();
    CheckedInputStream cis = null;
    try {
        cis = new CheckedInputStream(new FileInputStream(file), checkSummer);
        byte[] buf = new byte[128];
        while (cis.read(buf) >= 0) {
        // Just read for checksum to get calculated.
        }
        return checkSummer.getValue();
    } finally {
        if (cis != null) {
            try {
                cis.close();
            } catch (IOException e) {
            }
        }
    }
}