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.Await;
  import accord.messages.Await.AsyncAwaitComplete;
  import accord.messages.Await.AwaitOk;
  import accord.messages.RecoverAwait;
  import accord.messages.RecoverAwait.RecoverAwaitOk;
  import accord.primitives.Participants;
  import accord.primitives.Route;
  import accord.primitives.SaveStatus;
  import accord.primitives.TxnId;
  import accord.utils.Invariants;
  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.utils.vint.VIntCoding;
  
  public class AwaitSerializers
  {
      public static final UnversionedSerializer<Await> request = new RequestSerializer<>()
      {
          @Override
          public Await deserialize(TxnId txnId, Participants<?> scope, Await.Until awaitUntil, boolean notifyProgressLog, long minAwaitEpoch, long maxAwaitEpoch, int callbackId, DataInputPlus in)
          {
              return Await.SerializerSupport.create(txnId, scope, awaitUntil, notifyProgressLog, minAwaitEpoch, maxAwaitEpoch, callbackId);
          }
      };
  
      public static final UnversionedSerializer<RecoverAwait> recoverRequest = new RequestSerializer<>()
      {
          @Override
          public RecoverAwait deserialize(TxnId txnId, Participants<?> scope, Await.Until awaitUntil, boolean notifyProgressLog, long minAwaitEpoch, long maxAwaitEpoch, int callbackId, DataInputPlus in) throws IOException
          {
              TxnId recoverId = CommandSerializers.txnId.deserialize(in);
              return RecoverAwait.SerializerSupport.create(txnId, scope, awaitUntil, notifyProgressLog, minAwaitEpoch, maxAwaitEpoch, callbackId, recoverId);
          }
  
          @Override
          public void serialize(RecoverAwait await, DataOutputPlus out) throws IOException
          {
              super.serialize(await, out);
              CommandSerializers.txnId.serialize(await.recoverId, out);
          }
  
          @Override
          public long serializedSize(RecoverAwait await)
          {
              return super.serializedSize(await) + CommandSerializers.txnId.serializedSize(await.recoverId);
          }
      };
  
      static abstract class RequestSerializer<A extends Await> implements UnversionedSerializer<A>
      {
          abstract A deserialize(TxnId txnId, Participants<?> scope, Await.Until awaitUntil, boolean notifyProgressLog, long minAwaitEpoch, long maxAwaitEpoch, int callbackId, DataInputPlus in) throws IOException;
  
          @Override
          public void serialize(A await, DataOutputPlus out) throws IOException
          {
              CommandSerializers.txnId.serialize(await.txnId, out);
              KeySerializers.participants.serialize(await.scope, out);
              out.writeByte((await.until.ordinal() << 1) | (await.notifyProgressLog ? 1 : 0));
              out.writeUnsignedVInt(await.maxAwaitEpoch - await.txnId.epoch());
              out.writeUnsignedVInt(await.maxAwaitEpoch - await.minAwaitEpoch);
              out.writeUnsignedVInt32(await.callbackId + 1);
              Invariants.require(await.callbackId >= -1);
          }
  
          @Override
          public A deserialize(DataInputPlus in) throws IOException
          {
              TxnId txnId = CommandSerializers.txnId.deserialize(in);
              Participants<?> scope = KeySerializers.participants.deserialize(in);
              int blockedAndNotify = in.readByte();
              Await.Until awaitUntil = Await.Until.forOrdinal(blockedAndNotify >>> 1);
              boolean notifyProgressLog = (blockedAndNotify & 1) == 1;
              long maxAwaitEpoch = in.readUnsignedVInt() + txnId.epoch();
              long minAwaitEpoch = maxAwaitEpoch - in.readUnsignedVInt();
              int callbackId = in.readUnsignedVInt32() - 1;
              Invariants.require(callbackId >= -1);
              return deserialize(txnId, scope, awaitUntil, notifyProgressLog, minAwaitEpoch, maxAwaitEpoch, callbackId, in);
          }
  
          @Override
          public long serializedSize(A await)
          {
              return CommandSerializers.txnId.serializedSize(await.txnId)
                     + KeySerializers.participants.serializedSize(await.scope)
                     + TypeSizes.BYTE_SIZE
                     + VIntCoding.computeUnsignedVIntSize(await.maxAwaitEpoch - await.txnId.epoch())
                     + VIntCoding.computeUnsignedVIntSize(await.maxAwaitEpoch - await.minAwaitEpoch)
                     + VIntCoding.computeUnsignedVIntSize(await.callbackId + 1);
          }
      }
  
      public static final UnversionedSerializer<AwaitOk> syncReply = EncodeAsVInt32.of(AwaitOk.class);
      public static final UnversionedSerializer<RecoverAwaitOk> recoverReply = EncodeAsVInt32.of(RecoverAwaitOk.class);
  
      public static final UnversionedSerializer<AsyncAwaitComplete> asyncReply = new UnversionedSerializer<>()
      {
          @Override
          public void serialize(AsyncAwaitComplete ok, DataOutputPlus out) throws IOException
          {
              CommandSerializers.txnId.serialize(ok.txnId, out);
              KeySerializers.route.serialize(ok.route, out);
              out.writeByte(ok.newStatus.ordinal());
              out.writeUnsignedVInt32(ok.callbackId);
          }
  
          @Override
          public AsyncAwaitComplete deserialize(DataInputPlus in) throws IOException
          {
              TxnId txnId = CommandSerializers.txnId.deserialize(in);
              Route<?> scope = KeySerializers.route.deserialize(in);
              SaveStatus newStatus = SaveStatus.forOrdinal(in.readByte());
              int callbackId = in.readUnsignedVInt32();
              return new AsyncAwaitComplete(txnId, scope, newStatus, callbackId);
          }
  
          @Override
          public long serializedSize(AsyncAwaitComplete ok)
          {
              return CommandSerializers.txnId.serializedSize(ok.txnId)
                     + KeySerializers.route.serializedSize(ok.route)
                     + TypeSizes.BYTE_SIZE
                     + VIntCoding.computeVIntSize(ok.callbackId);
          }
      };
  }
  