| /** |
| * 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 (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); |
| } |
| } |