| /** |
| * 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.s4.core.triggers; |
| |
| import java.io.IOException; |
| |
| import org.apache.s4.core.App; |
| import org.apache.s4.core.ProcessingElement; |
| import org.apache.s4.fixtures.CommTestUtils; |
| import org.apache.s4.wordcount.StringEvent; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.ZooDefs.Ids; |
| import org.apache.zookeeper.ZooKeeper; |
| |
| public class TriggerablePE extends ProcessingElement implements Watcher { |
| |
| private ZooKeeper zk; |
| |
| public TriggerablePE() { |
| } |
| |
| public TriggerablePE(App app) { |
| super(app); |
| } |
| |
| public void onEvent(StringEvent event) { |
| try { |
| zk.create("/onEvent@" + event.getString(), new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| } catch (KeeperException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| |
| @Override |
| public void onCreate() { |
| if (zk == null) { |
| try { |
| zk = new ZooKeeper("localhost:" + CommTestUtils.ZK_PORT, 4000, this); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| public void onTrigger(StringEvent event) { |
| try { |
| zk.create("/onTrigger[StringEvent]@" + event.getString(), new byte[0], Ids.OPEN_ACL_UNSAFE, |
| CreateMode.PERSISTENT); |
| } catch (KeeperException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| |
| @Override |
| public void onRemove() { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| @Override |
| public void process(WatchedEvent event) { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| } |