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.camel.component.zookeeper.operations;
  
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import org.apache.camel.component.zookeeper.ZooKeeperUtils;
  import org.apache.zookeeper.WatchedEvent;
  
  /**
   * <code>AnyOfOperations</code> is a composite operation of one or more sub operation, executing each in turn until any
   * one succeeds. If any execute successfully, this operation succeeds; if the sub operations are all executed without
   * success it fails.
   * <p>
   * It is mostly used for test and watch scenarios where a node is tested for existence, data or children, falling back
   * to a corresponding watch operation if the test operation fails.
   */
  @SuppressWarnings("rawtypes")
  public class AnyOfOperations extends ZooKeeperOperation implements WatchedEventProvider {
  
      private ZooKeeperOperation[] keeperOperations;
      private ZooKeeperOperation operationProvidingResult;
  
      public AnyOfOperations(String node, ZooKeeperOperation... keeperOperations) {
          super(null, node, false);
          this.keeperOperations = keeperOperations;
      }
  
      @Override
      public OperationResult get() throws InterruptedException, ExecutionException {
          for (ZooKeeperOperation op : keeperOperations) {
              try {
                  OperationResult result = op.get();
                  if (result.isOk()) {
                      operationProvidingResult = op;
                      return result;
                  }
              } catch (InterruptedException e) {
                  Thread.currentThread().interrupt();
              } catch (Exception e) {
              }
          }
          throw new ExecutionException("All operations exhausted without one result", null);
      }
  
      @Override
      public OperationResult get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
          return get();
      }
  
      @Override
      public OperationResult getResult() {
          return null;
      }
  
      @Override
      public ZooKeeperOperation createCopy() throws Exception {
          ZooKeeperOperation[] copy = new ZooKeeperOperation[keeperOperations.length];
          for (int x = 0; x < keeperOperations.length; x++) {
              copy[x] = keeperOperations[x].createCopy();
          }
          return new AnyOfOperations(node, copy);
      }
  
      @Override
      public WatchedEvent getWatchedEvent() {
          return ZooKeeperUtils.getWatchedEvent(operationProvidingResult);
      }
  }
  