| /* |
| * 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.coordination; |
| |
| import java.util.List; |
| import org.apache.storm.utils.Utils; |
| |
| public abstract class BatchOutputCollector { |
| |
| /** |
| * Emits a tuple to the default output stream. |
| */ |
| public List<Integer> emit(List<Object> tuple) { |
| return emit(Utils.DEFAULT_STREAM_ID, tuple); |
| } |
| |
| public abstract List<Integer> emit(String streamId, List<Object> tuple); |
| |
| /** |
| * Emits a tuple to the specified task on the default output stream. This output stream must have been declared as a direct stream, and |
| * the specified task must use a direct grouping on this stream to receive the message. |
| */ |
| public void emitDirect(int taskId, List<Object> tuple) { |
| emitDirect(taskId, Utils.DEFAULT_STREAM_ID, tuple); |
| } |
| |
| public abstract void emitDirect(int taskId, String streamId, List<Object> tuple); |
| |
| /** |
| * Flush any buffered tuples (when batching is enabled). |
| */ |
| public abstract void flush(); |
| |
| public abstract void reportError(Throwable error); |
| } |