| /** |
| * 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.storm.nimbus; |
| |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class InMemoryTopologyActionNotifier implements ITopologyActionNotifierPlugin { |
| |
| //static to ensure eventhough the class is created using reflection we can still get |
| //the topology to actions |
| private static final Map<String, LinkedList<String>> topologyToActions = new HashMap<>(); |
| |
| |
| @Override |
| public void prepare(Map<String, Object> stormConf) { |
| //no-op |
| } |
| |
| @Override |
| public synchronized void notify(String topologyName, String action) { |
| if (!topologyToActions.containsKey(topologyName)) { |
| topologyToActions.put(topologyName, new LinkedList<String>()); |
| } |
| topologyToActions.get(topologyName).addLast(action); |
| } |
| |
| public List<String> getTopologyActions(String topologyName) { |
| return topologyToActions.get(topologyName); |
| } |
| |
| @Override |
| public void cleanup() { |
| //no-op |
| } |
| } |