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.distributedlog.zk;
  
  import javax.annotation.Nullable;
  import org.apache.distributedlog.util.Transaction;
  import org.apache.zookeeper.Op;
  import org.apache.zookeeper.OpResult;
  
  
  
  /**
   * ZooKeeper Transaction Operation.
   */
  public abstract class ZKOp implements Transaction.Op<Object> {
  
      protected final Op op;
  
      protected ZKOp(Op op) {
          this.op = op;
      }
  
      public Op getOp() {
          return op;
      }
  
      @Override
      public void commit(Object r) {
          assert(r instanceof OpResult);
          commitOpResult((OpResult) r);
      }
  
      protected abstract void commitOpResult(OpResult opResult);
  
      @Override
      public void abort(Throwable t, Object r) {
          assert(r instanceof OpResult);
          abortOpResult(t, (OpResult) r);
      }
  
      /**
       * Abort the operation with exception <i>t</i> and result <i>opResult</i>.
       *
       * @param t the reason to abort the operation
       * @param opResult the result of operation
       */
      protected abstract void abortOpResult(Throwable t,
                                            @Nullable OpResult opResult);
  }
  