content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.cassandra.service.accord.serializers;
  
  import java.io.IOException;
  
  import accord.messages.TxnRequest;
  import accord.primitives.Route;
  import accord.primitives.TxnId;
  import org.apache.cassandra.db.TypeSizes;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  
  public abstract class TxnRequestSerializer<T extends TxnRequest<?>> implements IVersionedSerializer<T>
  {
      void serializeHeader(T msg, DataOutputPlus out, Version version) throws IOException
      {
          CommandSerializers.txnId.serialize(msg.txnId, out);
          KeySerializers.route.serialize(msg.scope, out);
          out.writeUnsignedVInt(msg.waitForEpoch);
      }
  
      public abstract void serializeBody(T msg, DataOutputPlus out, Version version) throws IOException;
  
      @Override
      public final void serialize(T msg, DataOutputPlus out, Version version) throws IOException
      {
          serializeHeader(msg, out, version);
          serializeBody(msg, out, version);
      }
  
      public abstract T deserializeBody(DataInputPlus in, Version version, TxnId txnId, Route<?> scope, long waitForEpoch) throws IOException;
  
      @Override
      public final T deserialize(DataInputPlus in, Version version) throws IOException
      {
          TxnId txnId = CommandSerializers.txnId.deserialize(in);
          Route<?> scope = KeySerializers.route.deserialize(in);
          // TODO (desired): there should be a base epoch
          long waitForEpoch = in.readUnsignedVInt();
          return deserializeBody(in, version, txnId, scope, waitForEpoch);
      }
  
      long serializedHeaderSize(T msg, Version version)
      {
          return CommandSerializers.txnId.serializedSize(msg.txnId)
                 + KeySerializers.route.serializedSize(msg.scope()) +
                 TypeSizes.sizeofUnsignedVInt(msg.waitForEpoch);
      }
  
      public abstract long serializedBodySize(T msg, Version version);
  
      @Override
      public final long serializedSize(T msg, Version version)
      {
          return serializedHeaderSize(msg, version) + serializedBodySize(msg, version);
      }
  
      public static abstract class WithUnsyncedSerializer<T extends TxnRequest.WithUnsynced<?>> extends TxnRequestSerializer<T>
      {
          @Override
          void serializeHeader(T msg, DataOutputPlus out, Version version) throws IOException
          {
              super.serializeHeader(msg, out, version);
              out.writeUnsignedVInt(msg.minEpoch);
          }
  
          public abstract T deserializeBody(DataInputPlus in, Version version, TxnId txnId, Route<?> scope, long waitForEpoch, long minEpoch) throws IOException;
  
          @Override
          public final T deserializeBody(DataInputPlus in, Version version, TxnId txnId, Route<?> scope, long waitForEpoch) throws IOException
          {
              long minEpoch = in.readUnsignedVInt();
              return deserializeBody(in, version, txnId, scope, waitForEpoch, minEpoch);
          }
  
          @Override
          long serializedHeaderSize(T msg, Version version)
          {
              long size = super.serializedHeaderSize(msg, version);
              size += TypeSizes.sizeofUnsignedVInt(msg.minEpoch);
              return size;
          }
      }
  }
  