com.epam.eco.commons.kafka.serde.SimpleTransactionMetadataDecoder Maven / Gradle / Ivy

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A library of utilities, helpers and higher-level APIs for the Kafka client library

There is a newer version: 3.0.5

/*
 * Copyright 2019 EPAM Systems
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.epam.eco.commons.kafka.serde;

import java.nio.ByteBuffer;

import org.apache.commons.lang3.Validate;

import kafka.coordinator.transaction.TransactionLog;
import kafka.coordinator.transaction.TransactionMetadata;

/**
 * @author Andrei_Tytsik
 */
public class SimpleTransactionMetadataDecoder implements KeyValueDecoder {

    @Override
    public String decodeKey(byte[] keyBytes) {
        Validate.notNull(keyBytes, "Key bytes array can't be null");

        ByteBuffer byteBuffer = ByteBuffer.wrap(keyBytes);
        return TransactionLog.readTxnRecordKey(byteBuffer).transactionalId();
    }

    @Override
    public TransactionMetadata decodeValue(String key, byte[] valueBytes) {
        Validate.notNull(key, "Key can't be null");

        ByteBuffer byteBuffer = valueBytes != null ? ByteBuffer.wrap(valueBytes) : null;
        return TransactionLog.readTxnRecordValue(key, byteBuffer);
    }

}