org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecWatermarkAssigner Maven / Gradle / Ivy
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This module bridges Table/SQL API and runtime. It contains
all resources that are required during pre-flight and runtime
phase. The content of this module is work-in-progress. It will
replace flink-table-planner once it is stable. See FLINK-11439
and FLIP-32 for more details.
/*
* 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.plan.nodes.exec.stream;
import org.apache.flink.api.dag.Transformation;
import org.apache.flink.streaming.api.transformations.OneInputTransformation;
import org.apache.flink.table.api.TableConfig;
import org.apache.flink.table.api.config.ExecutionConfigOptions;
import org.apache.flink.table.data.RowData;
import org.apache.flink.table.planner.codegen.WatermarkGeneratorCodeGenerator;
import org.apache.flink.table.planner.delegation.PlannerBase;
import org.apache.flink.table.planner.plan.nodes.exec.ExecEdge;
import org.apache.flink.table.planner.plan.nodes.exec.ExecNode;
import org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase;
import org.apache.flink.table.planner.plan.nodes.exec.InputProperty;
import org.apache.flink.table.planner.plan.nodes.exec.SingleTransformationTranslator;
import org.apache.flink.table.planner.utils.JavaScalaConversionUtil;
import org.apache.flink.table.runtime.generated.GeneratedWatermarkGenerator;
import org.apache.flink.table.runtime.operators.wmassigners.WatermarkAssignerOperatorFactory;
import org.apache.flink.table.runtime.typeutils.InternalTypeInfo;
import org.apache.flink.table.types.logical.RowType;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonProperty;
import org.apache.calcite.rex.RexNode;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import static org.apache.flink.util.Preconditions.checkArgument;
import static org.apache.flink.util.Preconditions.checkNotNull;
/** Stream {@link ExecNode} which generates watermark based on the input elements. */
public class StreamExecWatermarkAssigner extends ExecNodeBase
implements StreamExecNode, SingleTransformationTranslator {
public static final String FIELD_NAME_WATERMARK_EXPR = "watermarkExpr";
public static final String FIELD_NAME_ROWTIME_FIELD_INDEX = "rowtimeFieldIndex";
@JsonProperty(FIELD_NAME_WATERMARK_EXPR)
private final RexNode watermarkExpr;
@JsonProperty(FIELD_NAME_ROWTIME_FIELD_INDEX)
private final int rowtimeFieldIndex;
public StreamExecWatermarkAssigner(
RexNode watermarkExpr,
int rowtimeFieldIndex,
InputProperty inputProperty,
RowType outputType,
String description) {
this(
watermarkExpr,
rowtimeFieldIndex,
getNewNodeId(),
Collections.singletonList(inputProperty),
outputType,
description);
}
@JsonCreator
public StreamExecWatermarkAssigner(
@JsonProperty(FIELD_NAME_WATERMARK_EXPR) RexNode watermarkExpr,
@JsonProperty(FIELD_NAME_ROWTIME_FIELD_INDEX) int rowtimeFieldIndex,
@JsonProperty(FIELD_NAME_ID) int id,
@JsonProperty(FIELD_NAME_INPUT_PROPERTIES) List inputProperties,
@JsonProperty(FIELD_NAME_OUTPUT_TYPE) RowType outputType,
@JsonProperty(FIELD_NAME_DESCRIPTION) String description) {
super(id, inputProperties, outputType, description);
checkArgument(inputProperties.size() == 1);
this.watermarkExpr = checkNotNull(watermarkExpr);
this.rowtimeFieldIndex = rowtimeFieldIndex;
}
@SuppressWarnings("unchecked")
@Override
protected Transformation translateToPlanInternal(PlannerBase planner) {
final ExecEdge inputEdge = getInputEdges().get(0);
final Transformation inputTransform =
(Transformation) inputEdge.translateToPlan(planner);
final TableConfig tableConfig = planner.getTableConfig();
final GeneratedWatermarkGenerator watermarkGenerator =
WatermarkGeneratorCodeGenerator.generateWatermarkGenerator(
tableConfig,
(RowType) inputEdge.getOutputType(),
watermarkExpr,
JavaScalaConversionUtil.toScala(Optional.empty()));
final long idleTimeout =
tableConfig
.getConfiguration()
.get(ExecutionConfigOptions.TABLE_EXEC_SOURCE_IDLE_TIMEOUT)
.toMillis();
final WatermarkAssignerOperatorFactory operatorFactory =
new WatermarkAssignerOperatorFactory(
rowtimeFieldIndex, idleTimeout, watermarkGenerator);
return new OneInputTransformation<>(
inputTransform,
getDescription(),
operatorFactory,
InternalTypeInfo.of(getOutputType()),
inputTransform.getParallelism());
}
}