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.bookkeeper.statelib.impl.mvcc.op.proto;
  
  import io.netty.util.Recycler;
  import io.netty.util.Recycler.Handle;
  import lombok.RequiredArgsConstructor;
  import org.apache.bookkeeper.api.kv.op.IncrementOp;
  import org.apache.bookkeeper.api.kv.op.OpType;
  import org.apache.bookkeeper.api.kv.options.IncrementOption;
  import org.apache.bookkeeper.stream.proto.kv.rpc.IncrementRequest;
  import org.apache.bookkeeper.stream.proto.kv.store.Command;
  
  /**
   * A protobuf encoded increment operation.
   */
  @RequiredArgsConstructor
  public class ProtoIncrementOpImpl implements IncrementOp<byte[], byte[]>, IncrementOption<byte[]> {
  
      public static ProtoIncrementOpImpl newIncrementOp(Command command) {
          ProtoIncrementOpImpl op = RECYCLER.get();
          op.setCommand(command);
          return op;
      }
  
      private static final Recycler<ProtoIncrementOpImpl> RECYCLER = new Recycler<ProtoIncrementOpImpl>() {
          @Override
          protected ProtoIncrementOpImpl newObject(Handle<ProtoIncrementOpImpl> handle) {
              return new ProtoIncrementOpImpl(handle);
          }
      };
  
      private final Handle<ProtoIncrementOpImpl> recyclerHandle;
      private IncrementRequest req;
      private byte[] key;
  
      @Override
      public long amount() {
          return req.getAmount();
      }
  
      @Override
      public IncrementOption<byte[]> option() {
          return this;
      }
  
      public void setCommand(Command command) {
          this.req = command.getIncrReq();
      }
  
      @Override
      public OpType type() {
          return OpType.INCREMENT;
      }
  
      @Override
      public byte[] key() {
          if (null != key) {
              return key;
          }
          key = req.getKey().toByteArray();
          return key;
      }
  
      void reset() {
          req = null;
          key = null;
      }
  
      @Override
      public void close() {
          reset();
          recyclerHandle.recycle(this);
      }
  
      @Override
      public boolean getTotal() {
          return req.getGetTotal();
      }
  }
  