sanha commented on a change in pull request #115: [NEMO-96] Modularize DataSkewPolicy to use MetricVertex and BarrierVertex URL: https://github.com/apache/incubator-nemo/pull/115#discussion_r214381029
########## File path: common/src/main/java/edu/snu/nemo/common/ir/vertex/transform/AggregateMetricTransform.java ########## @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2018 Seoul National University + * + * Licensed 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 edu.snu.nemo.common.ir.vertex.transform; + +import edu.snu.nemo.common.Pair; +import edu.snu.nemo.common.ir.OutputCollector; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.Map; + +/** + * A {@link Transform} relays input data from upstream vertex to downstream vertex promptly. + * This transform can be used for merging input data into the {@link OutputCollector}. + * @param <I> input type. + * @param <O> output type. + */ +public final class AggregateMetricTransform<I, O> implements Transform<I, O> { Review comment: Also, please update the comment. It does not just relay the input data to downstream. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services