org.apache.flink.table.runtime.range.AssignRangeIndexOperator Maven / Gradle / Ivy
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* 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.runtime.range;
import org.apache.flink.api.common.distributions.RangeBoundaries;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.operators.TwoInputSelection;
import org.apache.flink.streaming.api.operators.TwoInputStreamOperator;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
import org.apache.flink.table.dataformat.BaseRow;
import org.apache.flink.table.runtime.AbstractStreamOperatorWithMetrics;
import org.apache.flink.table.runtime.util.StreamRecordCollector;
import org.apache.flink.util.Collector;
/**
* This two-input-operator require a DataStream with RangeBoundaries as broadcast input, and
* generate Tuple2 which includes range index and record from the other input itself as output.
*
*/
public class AssignRangeIndexOperator extends AbstractStreamOperatorWithMetrics>
implements TwoInputStreamOperator> {
private final KeyExtractor keyExtractor;
private transient RangeBoundaries rangeBoundaries;
private transient Collector> collector;
public AssignRangeIndexOperator(KeyExtractor keyExtractor) {
this.keyExtractor = keyExtractor;
}
@Override
public void open() throws Exception {
super.open();
this.collector = new StreamRecordCollector<>(output);
}
@Override
public TwoInputSelection firstInputSelection() {
return TwoInputSelection.FIRST;
}
@Override
public TwoInputSelection processElement1(
StreamRecord streamRecord) throws Exception {
rangeBoundaries = new CommonRangeBoundaries(keyExtractor, streamRecord.getValue());
return TwoInputSelection.ANY;
}
@Override
public TwoInputSelection processElement2(
StreamRecord streamRecord) throws Exception {
if (rangeBoundaries == null) {
throw new RuntimeException("There should be one data from the first input.");
}
Tuple2 tupleWithPartitionId = new Tuple2<>();
tupleWithPartitionId.f0 = rangeBoundaries.getRangeIndex(streamRecord.getValue());
tupleWithPartitionId.f1 = streamRecord.getValue();
collector.collect(tupleWithPartitionId);
return TwoInputSelection.ANY;
}
@Override
public void endInput1() throws Exception {
}
@Override
public void endInput2() throws Exception {
}
}