| /** |
| * 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 backtype.storm.utils; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| |
| import backtype.storm.messaging.IConnection; |
| import backtype.storm.messaging.TaskMessage; |
| |
| public class TransferDrainer { |
| |
| private HashMap<String, ArrayList<ArrayList<TaskMessage>>> bundles = new HashMap(); |
| |
| public void add(HashMap<String, ArrayList<TaskMessage>> workerTupleSetMap) { |
| for (String key : workerTupleSetMap.keySet()) { |
| |
| ArrayList<ArrayList<TaskMessage>> bundle = bundles.get(key); |
| if (null == bundle) { |
| bundle = new ArrayList<ArrayList<TaskMessage>>(); |
| bundles.put(key, bundle); |
| } |
| |
| ArrayList tupleSet = workerTupleSetMap.get(key); |
| if (null != tupleSet && tupleSet.size() > 0) { |
| bundle.add(tupleSet); |
| } |
| } |
| } |
| |
| public void send(HashMap<String, IConnection> connections) { |
| for (String hostPort : bundles.keySet()) { |
| IConnection connection = connections.get(hostPort); |
| if (null != connection) { |
| ArrayList<ArrayList<TaskMessage>> bundle = bundles.get(hostPort); |
| Iterator<TaskMessage> iter = getBundleIterator(bundle); |
| if (null != iter && iter.hasNext()) { |
| connection.send(iter); |
| } |
| } |
| } |
| } |
| |
| private Iterator<TaskMessage> getBundleIterator(final ArrayList<ArrayList<TaskMessage>> bundle) { |
| |
| if (null == bundle) { |
| return null; |
| } |
| |
| return new Iterator<TaskMessage> () { |
| |
| private int offset = 0; |
| private int size = 0; |
| { |
| for (ArrayList<TaskMessage> list : bundle) { |
| size += list.size(); |
| } |
| } |
| |
| private int bundleOffset = 0; |
| private Iterator<TaskMessage> iter = bundle.get(bundleOffset).iterator(); |
| |
| @Override |
| public boolean hasNext() { |
| if (offset < size) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public TaskMessage next() { |
| TaskMessage msg = null; |
| if (iter.hasNext()) { |
| msg = iter.next(); |
| } else { |
| bundleOffset++; |
| iter = bundle.get(bundleOffset).iterator(); |
| msg = iter.next(); |
| } |
| if (null != msg) { |
| offset++; |
| } |
| return msg; |
| } |
| |
| @Override |
| public void remove() { |
| throw new RuntimeException("not supported"); |
| } |
| }; |
| } |
| |
| public void clear() { |
| bundles.clear(); |
| } |
| } |