Package org.apache.kafka.common.utils

Examples of org.apache.kafka.common.utils.Crc32.update()

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    /**
     * Compute the checksum of the record from the record contents
     */
    public static long computeChecksum(ByteBuffer buffer, int position, int size) {
        Crc32 crc = new Crc32();
        crc.update(buffer.array(), buffer.arrayOffset() + position, size);
        return crc.getValue();
    }

    /**
     * Compute the checksum of the record from the attributes, key and value payloads
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    /**
     * Compute the checksum of the record from the attributes, key and value payloads
     */
    public static long computeChecksum(byte[] key, byte[] value, CompressionType type, int valueOffset, int valueSize) {
        Crc32 crc = new Crc32();
        crc.update(CURRENT_MAGIC_VALUE);
        byte attributes = 0;
        if (type.id > 0)
            attributes = (byte) (attributes | (COMPRESSION_CODEC_MASK & type.id));
        crc.update(attributes);
        // update for the key
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        Crc32 crc = new Crc32();
        crc.update(CURRENT_MAGIC_VALUE);
        byte attributes = 0;
        if (type.id > 0)
            attributes = (byte) (attributes | (COMPRESSION_CODEC_MASK & type.id));
        crc.update(attributes);
        // update for the key
        if (key == null) {
            crc.updateInt(-1);
        } else {
            crc.updateInt(key.length);
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        // update for the key
        if (key == null) {
            crc.updateInt(-1);
        } else {
            crc.updateInt(key.length);
            crc.update(key, 0, key.length);
        }
        // update for the value
        if (value == null) {
            crc.updateInt(-1);
        } else {
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        if (value == null) {
            crc.updateInt(-1);
        } else {
            int size = valueSize >= 0 ? valueSize : (value.length - valueOffset);
            crc.updateInt(size);
            crc.update(value, valueOffset, size);
        }
        return crc.getValue();
    }

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