/** * 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.coordination; import backtype.storm.utils.Utils; import java.util.List; 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); public abstract void reportError(Throwable error); }