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

Example 11 with Checksum

use of java.util.zip.Checksum in project cassandra by apache.

the class IncomingTcpConnection method receiveMessages.

// Not closing constructed DataInputPlus's as the stream needs to remain open.
@SuppressWarnings("resource")
private void receiveMessages() throws IOException {
    // handshake (true) endpoint versions
    DataOutputStream out = new DataOutputStream(socket.getOutputStream());
    // if this version is < the MS version the other node is trying
    // to connect with, the other node will disconnect
    out.writeInt(MessagingService.current_version);
    out.flush();
    DataInputPlus in = new DataInputStreamPlus(socket.getInputStream());
    int maxVersion = in.readInt();
    // outbound side will reconnect if necessary to upgrade version
    assert version <= MessagingService.current_version;
    from = CompactEndpointSerializationHelper.deserialize(in);
    // record the (true) version of the endpoint
    MessagingService.instance().setVersion(from, maxVersion);
    logger.trace("Set version for {} to {} (will use {})", from, maxVersion, MessagingService.instance().getVersion(from));
    if (compressed) {
        logger.trace("Upgrading incoming connection to be compressed");
        LZ4FastDecompressor decompressor = LZ4Factory.fastestInstance().fastDecompressor();
        Checksum checksum = XXHashFactory.fastestInstance().newStreamingHash32(OutboundTcpConnection.LZ4_HASH_SEED).asChecksum();
        in = new DataInputStreamPlus(new LZ4BlockInputStream(socket.getInputStream(), decompressor, checksum));
    } else {
        ReadableByteChannel channel = socket.getChannel();
        in = new NIODataInputStream(channel != null ? channel : Channels.newChannel(socket.getInputStream()), BUFFER_SIZE);
    }
    while (true) {
        MessagingService.validateMagic(in.readInt());
        receiveMessage(in, version);
    }
}

Example 12 with Checksum

use of java.util.zip.Checksum in project guava by google.

the class ChecksumHashFunctionTest method assertChecksum.

private static void assertChecksum(Supplier<Checksum> supplier, String input) {
    byte[] bytes = HashTestUtils.ascii(input);
    Checksum checksum = supplier.get();
    checksum.update(bytes, 0, bytes.length);
    long value = checksum.getValue();
    String toString = "name";
    HashFunction func = new ChecksumHashFunction(supplier, 32, toString);
    assertEquals(toString, func.toString());
    assertEquals(value, func.hashBytes(bytes).padToLong());
}

Example 13 with Checksum

use of java.util.zip.Checksum in project lucene-solr by apache.

the class TestBufferedChecksum method testRandom.

public void testRandom() {
    Checksum c1 = new CRC32();
    Checksum c2 = new BufferedChecksum(new CRC32());
    int iterations = atLeast(10000);
    for (int i = 0; i < iterations; i++) {
        switch(random().nextInt(4)) {
            case 0:
                // update(byte[], int, int)
                int length = random().nextInt(1024);
                byte[] bytes = new byte[length];
                random().nextBytes(bytes);
                c1.update(bytes, 0, bytes.length);
                c2.update(bytes, 0, bytes.length);
                break;
            case 1:
                // update(int)
                int b = random().nextInt(256);
                c1.update(b);
                c2.update(b);
                break;
            case 2:
                // reset()
                c1.reset();
                c2.reset();
                break;
            case 3:
                // getValue()
                assertEquals(c1.getValue(), c2.getValue());
                break;
        }
    }
    assertEquals(c1.getValue(), c2.getValue());
}

Example 14 with Checksum

use of java.util.zip.Checksum in project poi by apache.

the class IOUtils method calculateChecksum.

/**
     * Calculate checksum on input data
     */
public static long calculateChecksum(byte[] data) {
    Checksum sum = new CRC32();
    sum.update(data, 0, data.length);
    return sum.getValue();
}

Example 15 with Checksum

use of java.util.zip.Checksum in project cassandra by apache.

the class CommitLogTest method testRecoveryWithBadSizeChecksum.

@Test
public void testRecoveryWithBadSizeChecksum() throws Exception {
    Checksum checksum = new CRC32();
    checksum.update(100);
    testRecoveryWithBadSizeArgument(100, 100, ~checksum.getValue());
}