godfreyhe commented on code in PR #20472: URL: https://github.com/apache/flink/pull/20472#discussion_r939596332
########## flink-table/flink-table-planner/src/test/java/org/apache/flink/connector/source/enumerator/DynamicFilteringValuesSourceEnumerator.java: ########## @@ -0,0 +1,149 @@ +/* + * 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.connector.source.enumerator; + +import org.apache.flink.api.connector.source.SourceEvent; +import org.apache.flink.api.connector.source.SplitEnumerator; +import org.apache.flink.api.connector.source.SplitEnumeratorContext; +import org.apache.flink.connector.source.split.ValuesSourcePartitionSplit; +import org.apache.flink.table.connector.source.DynamicFilteringData; +import org.apache.flink.table.connector.source.DynamicFilteringEvent; +import org.apache.flink.table.data.GenericRowData; +import org.apache.flink.table.types.logical.RowType; +import org.apache.flink.util.Preconditions; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.annotation.Nullable; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.stream.Collectors; + +/** A SplitEnumerator implementation for dynamic filtering source. */ +public class DynamicFilteringValuesSourceEnumerator + implements SplitEnumerator<ValuesSourcePartitionSplit, NoOpEnumState> { + private static final Logger LOG = + LoggerFactory.getLogger(DynamicFilteringValuesSourceEnumerator.class); + + private final SplitEnumeratorContext<ValuesSourcePartitionSplit> context; + private final List<ValuesSourcePartitionSplit> allSplits; + private final List<String> dynamicFilteringFields; + private transient boolean receivedDynamicFilteringEvent; + private transient List<ValuesSourcePartitionSplit> remainingSplits; + + public DynamicFilteringValuesSourceEnumerator( + SplitEnumeratorContext<ValuesSourcePartitionSplit> context, + List<ValuesSourcePartitionSplit> allSplits, + List<String> dynamicFilteringFields) { + this.context = context; + this.allSplits = allSplits; + this.dynamicFilteringFields = dynamicFilteringFields; + } + + @Override + public void start() {} + + @Override + public void handleSplitRequest(int subtaskId, @Nullable String requesterHostname) { + if (!receivedDynamicFilteringEvent) { + throw new IllegalStateException("DynamicFilteringEvent has not receive"); + } + if (remainingSplits.isEmpty()) { + context.signalNoMoreSplits(subtaskId); + LOG.info("No more splits available for subtask {}", subtaskId); + } else { + ValuesSourcePartitionSplit split = remainingSplits.remove(0); + LOG.debug("Assigned split to subtask {} : {}", subtaskId, split); + context.assignSplit(split, subtaskId); + } + } + + @Override + public void handleSourceEvent(int subtaskId, SourceEvent sourceEvent) { + if (sourceEvent instanceof DynamicFilteringEvent) { + LOG.warn("Received DynamicFilteringEvent: {}", subtaskId); + receivedDynamicFilteringEvent = true; + DynamicFilteringData dynamicFilteringData = + ((DynamicFilteringEvent) sourceEvent).getData(); + assignPartitions(dynamicFilteringData); + } else { + LOG.error("Received unrecognized event: {}", sourceEvent); + } + } + + private void assignPartitions(DynamicFilteringData data) { + if (data.isFiltering()) { + remainingSplits = new ArrayList<>(); + for (ValuesSourcePartitionSplit split : allSplits) { + List<String> values = + dynamicFilteringFields.stream() + .map(k -> split.getPartition().get(k)) + .collect(Collectors.toList()); + LOG.info("values: " + values); + if (data.contains(generateRowData(values, data.getRowType()))) { + remainingSplits.add(split); + } + } + } else { + remainingSplits = new ArrayList<>(allSplits); + } + LOG.info("remainingSplits: " + remainingSplits); + } + + private GenericRowData generateRowData(List<String> partitionValues, RowType rowType) { + Preconditions.checkArgument(partitionValues.size() == rowType.getFieldCount()); + Object[] values = new Object[partitionValues.size()]; + for (int i = 0; i < rowType.getFieldCount(); ++i) { + switch (rowType.getTypeAt(i).getTypeRoot()) { + case VARCHAR: + values[i] = partitionValues.get(i); + break; + case INTEGER: + values[i] = Integer.valueOf(partitionValues.get(i)); + break; + case BIGINT: + values[i] = Long.valueOf(partitionValues.get(i)); + break; + default: + throw new UnsupportedOperationException( + rowType.getTypeAt(i).getTypeRoot() + " is not supported."); + } + } + return GenericRowData.of(values); + } + + @Override + public void addSplitsBack(List<ValuesSourcePartitionSplit> splits, int subtaskId) { + remainingSplits.addAll(splits); + } + + @Override + public void addReader(int subtaskId) {} + + @Override + public NoOpEnumState snapshotState(long checkpointId) throws Exception { + return null; Review Comment: good catch -- This is an automated message from the Apache Git Service. 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