Airblader commented on a change in pull request #15369: URL: https://github.com/apache/flink/pull/15369#discussion_r601233784
########## File path: flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/sinks/DataStreamDynamicTableSink.java ########## @@ -0,0 +1,210 @@ +/* + * 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.table.planner.sinks; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.api.dag.Transformation; +import org.apache.flink.streaming.api.operators.AbstractStreamOperatorFactory; +import org.apache.flink.streaming.api.operators.OneInputStreamOperator; +import org.apache.flink.streaming.api.operators.OneInputStreamOperatorFactory; +import org.apache.flink.streaming.api.operators.StreamOperator; +import org.apache.flink.streaming.api.operators.StreamOperatorParameters; +import org.apache.flink.streaming.api.transformations.OneInputTransformation; +import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; +import org.apache.flink.table.api.TableException; +import org.apache.flink.table.connector.ChangelogMode; +import org.apache.flink.table.connector.RuntimeConverter; +import org.apache.flink.table.connector.sink.DynamicTableSink; +import org.apache.flink.table.connector.sink.SinkTransformationProvider; +import org.apache.flink.table.data.RowData; +import org.apache.flink.table.runtime.operators.TableStreamOperator; +import org.apache.flink.table.runtime.typeutils.ExternalTypeInfo; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.logical.utils.LogicalTypeChecks; + +/** + * A {@link DynamicTableSink} defining how to emit a {@link org.apache.flink.table.api.Table} to a {@link org.apache.flink.streaming.api.datastream.DataStream}. + */ +@Internal +public class DataStreamDynamicTableSink implements DynamicTableSink { + private final ChangelogMode changelogMode; + private final DataType dataType; + + public DataStreamDynamicTableSink(ChangelogMode changelogMode, DataType dataType) { + this.changelogMode = changelogMode; + this.dataType = dataType; + } + + @Override + public ChangelogMode getChangelogMode(ChangelogMode requestedMode) { + return changelogMode; + } + + @Override + public SinkRuntimeProvider getSinkRuntimeProvider(Context sinkContext) { + final DataStructureConverter converter = sinkContext.createDataStructureConverter(dataType); + + return new SinkTransformationProvider() { + @Override + public Transformation<Object> getTransformation(SinkTransformationProvider.Context transformationContext) { + final SinkTransformationOperatorFactory + operatorFactory = + new SinkTransformationOperatorFactory( + dataType, + converter, + transformationContext.getRowtimeIndex(), + transformationContext.isObjectReuseEnabled()); + + return new OneInputTransformation<>( + transformationContext.getInputTransformation(), + "SinkTransformation", + operatorFactory, + ExternalTypeInfo.of(dataType, transformationContext.isObjectReuseEnabled()), + transformationContext.getInputTransformation().getParallelism()); + } + }; + } + + @Override + public DynamicTableSink copy() { + return new DataStreamDynamicTableSink(changelogMode, dataType); + } + + @Override + public String asSummaryString() { + return toString(); + } + + /** + * Operator to transform records during conversion to {@link org.apache.flink.streaming.api.datastream.DataStream}. + * + * <p>This operator takes care of setting the appropriate rowtime into the output {@link StreamRecord}. + * It also automatically "unwraps" the incoming record if it has arity 1 and the requested outbound type is a primitive. + */ + private static class SinkTransformationOperator extends TableStreamOperator<Object> + implements OneInputStreamOperator<RowData, Object> { + + private final DataType dataType; + private final DataStructureConverter converter; + private final int rowtimeIndex; + private final boolean objectReuseEnabled; + + private final StreamRecord<Object> outElement = new StreamRecord<>(null); + + private boolean unwrapAsPrimitive = false; + private RowData.FieldGetter singleFieldGetter; + + public SinkTransformationOperator( + DataType dataType, + DataStructureConverter converter, + int rowtimeIndex, + boolean objectReuseEnabled) { + this.dataType = dataType; + this.converter = converter; + this.rowtimeIndex = rowtimeIndex; + this.objectReuseEnabled = objectReuseEnabled; + } + + @Override + public void open() throws Exception { + super.open(); + + unwrapAsPrimitive = !LogicalTypeChecks.isCompositeType(dataType.getLogicalType()); + singleFieldGetter = RowData.createFieldGetter(dataType.getLogicalType(), 0); + + final ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); Review comment: Do we need to pass a classloader from the outside instead? -- This is an automated message from the Apache Git Service. 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