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[FLINK-36849][table] Introduce AppendOnlyFirstNFunction in Rank with …
…Async State API
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126 changes: 126 additions & 0 deletions
126
...g/apache/flink/table/runtime/operators/rank/async/AsyncStateAppendOnlyFirstNFunction.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,126 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.flink.table.runtime.operators.rank.async; | ||
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| import org.apache.flink.api.common.functions.OpenContext; | ||
| import org.apache.flink.api.common.state.StateTtlConfig; | ||
| import org.apache.flink.api.common.state.v2.StateFuture; | ||
| import org.apache.flink.api.common.state.v2.ValueState; | ||
| import org.apache.flink.api.common.state.v2.ValueStateDescriptor; | ||
| import org.apache.flink.api.common.typeinfo.Types; | ||
| import org.apache.flink.streaming.api.operators.StreamingRuntimeContext; | ||
| import org.apache.flink.table.data.RowData; | ||
| import org.apache.flink.table.runtime.generated.GeneratedRecordComparator; | ||
| import org.apache.flink.table.runtime.keyselector.RowDataKeySelector; | ||
| import org.apache.flink.table.runtime.operators.rank.AppendOnlyFirstNFunction; | ||
| import org.apache.flink.table.runtime.operators.rank.RankRange; | ||
| import org.apache.flink.table.runtime.operators.rank.RankType; | ||
| import org.apache.flink.table.runtime.operators.rank.utils.AppendOnlyFirstNHelper; | ||
| import org.apache.flink.table.runtime.typeutils.InternalTypeInfo; | ||
| import org.apache.flink.types.RowKind; | ||
| import org.apache.flink.util.Collector; | ||
| import org.apache.flink.util.Preconditions; | ||
|
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| import java.io.IOException; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
|
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| /** | ||
| * A variant of {@link AppendOnlyFirstNFunction} to handle first-n case. | ||
| * | ||
| * <p>The input stream should only contain INSERT messages. | ||
| */ | ||
| public class AsyncStateAppendOnlyFirstNFunction extends AbstractAsyncStateTopNFunction { | ||
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| private static final long serialVersionUID = -889227691088906247L; | ||
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| // state stores a counter to record the occurrence of key. | ||
| private ValueState<Integer> state; | ||
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| private transient AsyncStateAppendOnlyFirstNHelper helper; | ||
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| public AsyncStateAppendOnlyFirstNFunction( | ||
| StateTtlConfig ttlConfig, | ||
| InternalTypeInfo<RowData> inputRowType, | ||
| GeneratedRecordComparator sortKeyGeneratedRecordComparator, | ||
| RowDataKeySelector sortKeySelector, | ||
| RankType rankType, | ||
| RankRange rankRange, | ||
| boolean generateUpdateBefore, | ||
| boolean outputRankNumber) { | ||
| super( | ||
| ttlConfig, | ||
| inputRowType, | ||
| sortKeyGeneratedRecordComparator, | ||
| sortKeySelector, | ||
| rankType, | ||
| rankRange, | ||
| generateUpdateBefore, | ||
| outputRankNumber); | ||
| } | ||
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| @Override | ||
| public void open(OpenContext openContext) throws Exception { | ||
| super.open(openContext); | ||
| ValueStateDescriptor<Integer> stateDesc = | ||
| new ValueStateDescriptor<>("counterState", Types.INT); | ||
| if (ttlConfig.isEnabled()) { | ||
| stateDesc.enableTimeToLive(ttlConfig); | ||
| } | ||
| state = ((StreamingRuntimeContext) getRuntimeContext()).getValueState(stateDesc); | ||
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| helper = new AsyncStateAppendOnlyFirstNHelper(); | ||
| } | ||
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| @Override | ||
| public void processElement(RowData input, Context context, Collector<RowData> out) | ||
| throws Exception { | ||
| StateFuture<Long> rankEndFuture = initRankEnd(input); | ||
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| // Ensure the message is an insert-only operation. | ||
| Preconditions.checkArgument(input.getRowKind() == RowKind.INSERT); | ||
| AtomicLong currentRank = new AtomicLong(getCurrentRank()); | ||
| // Ignore record if it does not belong to the first-n rows | ||
| rankEndFuture.thenCompose( | ||
| rankEnd -> { | ||
| if (currentRank.get() >= rankEnd) { | ||
| return null; | ||
| } | ||
| currentRank.set(currentRank.get() + 1); | ||
| StateFuture<Void> updateFuture = state.asyncUpdate((int) currentRank.get()); | ||
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| return updateFuture.thenAccept( | ||
| VOID -> { | ||
| helper.sendData( | ||
| hasOffset(), out, input, currentRank.get(), rankEnd); | ||
| }); | ||
| }); | ||
| } | ||
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| private int getCurrentRank() throws IOException { | ||
| Integer value = state.value(); | ||
| return value == null ? 0 : value; | ||
| } | ||
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| private class AsyncStateAppendOnlyFirstNHelper extends AppendOnlyFirstNHelper { | ||
| public AsyncStateAppendOnlyFirstNHelper() { | ||
| super(AsyncStateAppendOnlyFirstNFunction.this); | ||
| } | ||
| } | ||
| } |
44 changes: 44 additions & 0 deletions
44
...main/java/org/apache/flink/table/runtime/operators/rank/utils/AppendOnlyFirstNHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.flink.table.runtime.operators.rank.utils; | ||
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| import org.apache.flink.table.data.RowData; | ||
| import org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction; | ||
| import org.apache.flink.table.runtime.operators.rank.AppendOnlyFirstNFunction; | ||
| import org.apache.flink.table.runtime.operators.rank.async.AsyncStateAppendOnlyFirstNFunction; | ||
| import org.apache.flink.util.Collector; | ||
|
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| /** | ||
| * A helper to help do the logic 'Top-1' in {@link AppendOnlyFirstNFunction} and {@link | ||
| * AsyncStateAppendOnlyFirstNFunction}. | ||
| */ | ||
| public class AppendOnlyFirstNHelper extends AbstractTopNFunction.AbstractTopNHelper { | ||
| public AppendOnlyFirstNHelper(AbstractTopNFunction topNFunction) { | ||
| super(topNFunction); | ||
| } | ||
|
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| public void sendData( | ||
| boolean hasOffset, Collector<RowData> out, RowData inputRow, long rank, long rankEnd) { | ||
| if (outputRankNumber || hasOffset) { | ||
| collectInsert(out, inputRow, rank, rankEnd); | ||
| } else { | ||
| collectInsert(out, inputRow); | ||
| } | ||
| } | ||
| } |
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