tephra-core/src/main/java/co/cask/tephra/TransactionCodec.java

/*
 * Copyright © 2014 Cask Data, Inc.
 *
 * 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 co.cask.tephra;

import co.cask.tephra.distributed.TransactionConverterUtils;
import co.cask.tephra.distributed.thrift.TTransaction;
import org.apache.thrift.TDeserializer;
import org.apache.thrift.TException;
import org.apache.thrift.TSerializer;

import java.io.IOException;

/**
 * Handles serialization and deserialization of {@link co.cask.tephra.Transaction} instances to and from {@code byte[]}.
 */
public class TransactionCodec {

  public TransactionCodec() {
  }

  public byte[] encode(Transaction tx) throws IOException {
    TTransaction thriftTx = TransactionConverterUtils.wrap(tx);
    TSerializer serializer = new TSerializer();
    try {
      return serializer.serialize(thriftTx);
    } catch (TException te) {
      throw new IOException(te);
    }
  }

  public Transaction decode(byte[] encoded) throws IOException {
    TTransaction thriftTx = new TTransaction();
    TDeserializer deserializer = new TDeserializer();
    try {
      deserializer.deserialize(thriftTx, encoded);
      return TransactionConverterUtils.unwrap(thriftTx);
    } catch (TException te) {
      throw new IOException(te);
    }
  }
}