| /** |
| * 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.messaging; |
| |
| import backtype.storm.grouping.Load; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| public interface IConnection { |
| /** |
| * Register a callback to be notified when data is ready to be processed. |
| * @param cb the callback to process the messages. |
| */ |
| public void registerRecv(IConnectionCallback cb); |
| |
| /** |
| * Send load metrics to all downstream connections. |
| * @param taskToLoad a map from the task id to the load for that task. |
| */ |
| public void sendLoadMetrics(Map<Integer, Double> taskToLoad); |
| |
| /** |
| * send a message with taskId and payload |
| * @param taskId task ID |
| * @param payload |
| */ |
| public void send(int taskId, byte[] payload); |
| |
| /** |
| * send batch messages |
| * @param msgs |
| */ |
| |
| public void send(Iterator<TaskMessage> msgs); |
| |
| /** |
| * Get the current load for the given tasks |
| * @param tasks the tasks to look for. |
| * @return a Load for each of the tasks it knows about. |
| */ |
| public Map<Integer, Load> getLoad(Collection<Integer> tasks); |
| |
| /** |
| * close this connection |
| */ |
| public void close(); |
| } |