gaoyunhaii commented on a change in pull request #8: URL: https://github.com/apache/flink-ml/pull/8#discussion_r731026886
########## File path: flink-ml-iteration/src/main/java/org/apache/flink/ml/iteration/operator/allround/MultipleInputAllRoundWrapperOperator.java ########## @@ -0,0 +1,116 @@ +/* + * 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.flink.ml.iteration.operator.allround; + +import org.apache.flink.ml.iteration.IterationRecord; +import org.apache.flink.streaming.api.operators.Input; +import org.apache.flink.streaming.api.operators.MultipleInputStreamOperator; +import org.apache.flink.streaming.api.operators.StreamOperatorFactory; +import org.apache.flink.streaming.api.operators.StreamOperatorParameters; +import org.apache.flink.streaming.api.watermark.Watermark; +import org.apache.flink.streaming.runtime.streamrecord.LatencyMarker; +import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; +import org.apache.flink.util.FlinkRuntimeException; + +import java.util.ArrayList; +import java.util.List; + +/** All-round wrapper for the multiple-inputs operator. */ +public class MultipleInputAllRoundWrapperOperator<OUT> + extends AbstractAllRoundWrapperOperator<OUT, MultipleInputStreamOperator<OUT>> + implements MultipleInputStreamOperator<IterationRecord<OUT>> { + + public MultipleInputAllRoundWrapperOperator( + StreamOperatorParameters<IterationRecord<OUT>> parameters, + StreamOperatorFactory<OUT> operatorFactory) { + super(parameters, operatorFactory); + } + + private <IN> void processElement( + int inputIndex, + Input<IN> input, + StreamRecord<IN> reusedInput, + StreamRecord<IterationRecord<IN>> element) + throws Exception { + switch (element.getValue().getType()) { + case RECORD: + reusedInput.replace(element.getValue().getValue(), element.getTimestamp()); + setIterationContextRound(element.getValue().getRound()); + input.processElement(reusedInput); + clearIterationContextRound(); + break; + case EPOCH_WATERMARK: + onEpochWatermarkEvent(inputIndex, element.getValue()); + break; + default: + throw new FlinkRuntimeException("Not supported iteration record type: " + element); + } + } + + @Override + @SuppressWarnings({"unchecked", "rawtypes"}) + public List<Input> getInputs() { + List<Input> proxyInputs = new ArrayList<>(); + for (int i = 0; i < wrappedOperator.getInputs().size(); ++i) { + // TODO: Note that here we relies on the assumption that the + // stream graph generator labels the input from 1 to n for + // the input array, which we map them from 0 to n - 1. + proxyInputs.add(new ProxyInput(i)); + } + return proxyInputs; + } + + public class ProxyInput<IN> implements Input<IterationRecord<IN>> { Review comment: In the original flink implementation `Input` is only explicitly used in `MultipleInputStreamOperator`, thus here the `ProxyInput` is also only used in `MultipleInputStreamOperator`. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
