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.api.kv.impl.result;
  
  import static io.netty.util.ReferenceCountUtil.release;
  import static io.netty.util.ReferenceCountUtil.retain;
  
  import io.netty.util.Recycler.Handle;
  import lombok.Getter;
  import lombok.Setter;
  import lombok.ToString;
  import lombok.experimental.Accessors;
  import org.apache.bookkeeper.api.kv.op.OpType;
  import org.apache.bookkeeper.api.kv.result.Code;
  import org.apache.bookkeeper.api.kv.result.Result;
  
  /**
   * A base implementation of {@link Result}.
   */
  @Accessors(fluent = true, chain = true)
  @Setter
  @Getter
  @ToString(exclude = "handle")
  abstract class ResultImpl<K, V, T extends ResultImpl<K, V, T>> implements Result<K, V> {
  
      protected final Handle<T> handle;
      protected final OpType type;
  
      protected long revision;
      protected Code code;
      protected K pKey;
  
      protected ResultImpl(OpType type, Handle<T> handle) {
          this.type = type;
          this.handle = handle;
      }
  
      abstract T asResult();
  
      public ResultImpl<K, V, T> pKey(K pKey) {
          release(this.pKey);
          this.pKey = retain(pKey);
          return this;
      }
  
      protected void reset() {
          this.code = null;
          this.revision = -1L;
          this.code = Code.UNEXPECTED;
          release(pKey);
          this.pKey = null;
      }
  
      @Override
      public void close() {
          reset();
  
          this.handle.recycle(asResult());
      }
  }
  