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 javax.annotation.Nullable;
  
  import accord.coordinate.ExecuteFlag.ExecuteFlags;
  import accord.messages.PreAccept;
  import accord.messages.PreAccept.PreAcceptOk;
  import accord.messages.PreAccept.PreAcceptReply;
  import accord.primitives.FullRoute;
  import accord.primitives.PartialDeps;
  import accord.primitives.PartialTxn;
  import accord.primitives.Route;
  import accord.primitives.TxnId;
  import org.apache.cassandra.db.TypeSizes;
  import org.apache.cassandra.io.UnversionedSerializer;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  import org.apache.cassandra.service.accord.serializers.CommandSerializers.ExecuteAtSerializer;
  import org.apache.cassandra.service.accord.serializers.TxnRequestSerializer.WithUnsyncedSerializer;
  
  
  public class PreacceptSerializers
  {
      private PreacceptSerializers() {}
  
      public static final IVersionedSerializer<PreAccept> request = new WithUnsyncedSerializer<>()
      {
          @Override
          public void serializeBody(PreAccept msg, DataOutputPlus out, Version version) throws IOException
          {
              int flags = (msg.partialDeps == null ? 0 : 1)
                          | (msg.route == null ? 0 : 2)
                          | (msg.hasCoordinatorVote ? 4 : 0)
                          | (msg.acceptEpoch == msg.minEpoch ? 0 : 8);
              out.writeByte(flags);
              CommandSerializers.partialTxn.serialize(msg.partialTxn, out, version);
              if (msg.partialDeps != null)
                  DepsSerializers.partialDeps.serialize(msg.partialDeps, out);
              if (msg.route != null)
                  KeySerializers.fullRoute.serialize(msg.route, out);
              if (msg.acceptEpoch != msg.minEpoch)
                  out.writeUnsignedVInt(msg.acceptEpoch - msg.minEpoch);
          }
  
          @Override
          public PreAccept deserializeBody(DataInputPlus in, Version version, TxnId txnId, Route<?> scope, long waitForEpoch, long minEpoch) throws IOException
          {
              byte flags = in.readByte();
              PartialTxn partialTxn = CommandSerializers.partialTxn.deserialize(in, version);
              @Nullable PartialDeps partialDeps = (flags & 1) == 0 ? null : DepsSerializers.partialDeps.deserialize(in);
              @Nullable FullRoute<?> fullRoute = (flags & 2) == 0 ? null : KeySerializers.fullRoute.deserialize(in);
              boolean hasCoordinatorVote = (flags & 4) != 0;
              long acceptEpoch = (flags & 8) == 0 ? minEpoch : in.readUnsignedVInt() + minEpoch;
              return PreAccept.SerializerSupport.create(txnId, scope, waitForEpoch, minEpoch, acceptEpoch, partialTxn, partialDeps, hasCoordinatorVote, fullRoute);
          }
  
          @Override
          public long serializedBodySize(PreAccept msg, Version version)
          {
              return   TypeSizes.BYTE_SIZE
                     + CommandSerializers.partialTxn.serializedSize(msg.partialTxn, version)
                     + (msg.partialDeps == null ? 0 : DepsSerializers.partialDeps.serializedSize(msg.partialDeps))
                     + (msg.route == null ? 0 : KeySerializers.fullRoute.serializedSize(msg.route))
                     + (msg.acceptEpoch == msg.minEpoch ? 0 : TypeSizes.sizeofUnsignedVInt(msg.acceptEpoch - msg.minEpoch));
          }
      };
  
      public static final UnversionedSerializer<PreAcceptReply> reply = new UnversionedSerializer<>()
      {
          @Override
          public void serialize(PreAcceptReply reply, DataOutputPlus out) throws IOException
          {
              out.writeBoolean(reply.isOk());
              if (!reply.isOk())
                  return;
  
              PreAcceptOk preAcceptOk = (PreAcceptOk) reply;
              CommandSerializers.txnId.serialize(preAcceptOk.txnId, out);
              ExecuteAtSerializer.serialize(preAcceptOk.txnId, preAcceptOk.witnessedAt, out);
              DepsSerializers.deps.serialize(preAcceptOk.deps, out);
              out.writeUnsignedVInt32(preAcceptOk.flags.bits());
          }
  
          @Override
          public PreAcceptReply deserialize(DataInputPlus in) throws IOException
          {
              if (!in.readBoolean())
                  return PreAccept.PreAcceptNack.INSTANCE;
  
              TxnId txnId = CommandSerializers.txnId.deserialize(in);
              return new PreAcceptOk(txnId,
                                     ExecuteAtSerializer.deserialize(txnId, in),
                                     DepsSerializers.deps.deserialize(in),
                                     ExecuteFlags.get(in.readUnsignedVInt32()));
          }
  
          @Override
          public long serializedSize(PreAcceptReply reply)
          {
              long size = TypeSizes.sizeof(reply.isOk());
              if (!reply.isOk())
                  return size;
  
              PreAcceptOk preAcceptOk = (PreAcceptOk) reply;
              size += CommandSerializers.txnId.serializedSize(preAcceptOk.txnId);
              size += ExecuteAtSerializer.serializedSize(preAcceptOk.txnId, preAcceptOk.witnessedAt);
              size += DepsSerializers.deps.serializedSize(preAcceptOk.deps);
              size += TypeSizes.sizeofUnsignedVInt(preAcceptOk.flags.bits());
              return size;
          }
      };
  }
  