| /* |
| * 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 copysecond 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.join.stream; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.java.functions.KeySelector; |
| import org.apache.flink.api.java.tuple.Tuple3; |
| import org.apache.flink.runtime.state.keyed.KeyedValueState; |
| import org.apache.flink.streaming.api.operators.InternalTimer; |
| import org.apache.flink.streaming.api.operators.TwoInputSelection; |
| import org.apache.flink.streaming.runtime.streamrecord.StreamRecord; |
| import org.apache.flink.table.codegen.GeneratedJoinConditionFunction; |
| import org.apache.flink.table.codegen.GeneratedProjection; |
| import org.apache.flink.table.dataformat.BaseRow; |
| import org.apache.flink.table.dataformat.util.BaseRowUtil; |
| import org.apache.flink.table.runtime.join.stream.state.JoinStateHandler; |
| import org.apache.flink.table.typeutils.BaseRowTypeInfo; |
| |
| import java.util.Iterator; |
| |
| /** |
| * Inner join operator based on hash. |
| */ |
| @Internal |
| public class InnerJoinStreamOperator extends JoinStreamOperator { |
| |
| private static final long serialVersionUID = 1L; |
| |
| public InnerJoinStreamOperator( |
| BaseRowTypeInfo leftType, |
| BaseRowTypeInfo rightType, GeneratedJoinConditionFunction condFuncCode, |
| KeySelector<BaseRow, BaseRow> leftKeySelector, |
| KeySelector<BaseRow, BaseRow> rightKeySelector, |
| GeneratedProjection leftPkProjectCode, GeneratedProjection rightPkProjectCode, |
| JoinStateHandler.Type leftJoinStateType, |
| JoinStateHandler.Type rightJoinStateType, long maxRetentionTime, long minRetentionTime, |
| boolean[] filterNullKeys) { |
| super(leftType, rightType, condFuncCode, leftKeySelector, rightKeySelector, leftPkProjectCode, |
| rightPkProjectCode, leftJoinStateType, rightJoinStateType, maxRetentionTime, minRetentionTime, |
| filterNullKeys); |
| } |
| |
| @Override |
| public void open() throws Exception { |
| super.open(); |
| LOG.info("leftJoinStateType {}, rightJoinStateType {}", leftJoinStateType, rightJoinStateType); |
| LOG.info("Init InnerJoinStreamOperator."); |
| } |
| |
| // call processElement1 if input is from the left of join |
| @Override |
| public TwoInputSelection processElement1(StreamRecord<BaseRow> element) throws Exception { |
| processElement( |
| getOrCopyBaseRow(element, true), |
| leftStateHandler, |
| rightStateHandler, |
| true, |
| leftTimerState, |
| stateCleaningEnabled); |
| |
| return TwoInputSelection.ANY; |
| } |
| |
| |
| // call processElement2 if input is from the right of join |
| @Override |
| public TwoInputSelection processElement2(StreamRecord<BaseRow> element) throws Exception { |
| processElement( |
| getOrCopyBaseRow(element, false), |
| rightStateHandler, |
| leftStateHandler, |
| false, |
| rightTimerState, |
| stateCleaningEnabled); |
| |
| return TwoInputSelection.ANY; |
| } |
| |
| @Override |
| public void onProcessingTime(InternalTimer<BaseRow, Byte> timer) throws Exception { |
| byte namespace = timer.getNamespace(); |
| if (namespace == 1) { |
| //left |
| if (needToCleanupState(timer.getKey(), timer.getTimestamp(), leftTimerState)) { |
| leftStateHandler.remove(timer.getKey()); |
| } |
| |
| } else { |
| //right |
| if (needToCleanupState(timer.getKey(), timer.getTimestamp(), rightTimerState)) { |
| rightStateHandler.remove(timer.getKey()); |
| } |
| } |
| } |
| |
| private void processElement( |
| BaseRow input, |
| JoinStateHandler inputStateHandler, |
| JoinStateHandler otherStateHandler, |
| boolean inputIsLeft, KeyedValueState<BaseRow, Long> timerState, |
| boolean cleaningBasedTimer) throws Exception { |
| inputStateHandler.extractCurrentJoinKey(input); |
| inputStateHandler.extractCurrentPrimaryKey(input); |
| |
| long currentTime = internalTimerService.currentProcessingTime(); |
| |
| if (BaseRowUtil.isRetractMsg(input)) { |
| //retract |
| inputStateHandler.retract(input); |
| } else { |
| //register timer |
| registerProcessingCleanupTimer(inputStateHandler.getCurrentJoinKey(), currentTime, inputIsLeft, |
| timerState); |
| |
| inputStateHandler.add(input, currentTime + maxRetentionTime); |
| } |
| |
| Iterator<Tuple3<BaseRow, Long, Long>> iterator = otherStateHandler.getRecords( |
| inputStateHandler.getCurrentJoinKey()); |
| joinedRow.setHeader(input.getHeader()); |
| while (iterator.hasNext()) { |
| Tuple3<BaseRow, Long, Long> tuple3 = iterator.next(); |
| BaseRow baseRow = tuple3.f0; |
| long count = tuple3.f1; |
| if (inputIsLeft) { |
| if (applyCondition(input, baseRow, |
| inputStateHandler.getCurrentJoinKey())) { |
| joinedRow.replace(input, baseRow); |
| for (int i = 0; i < count; i++) { |
| collector.collect(joinedRow); |
| } |
| } |
| } else { |
| if (applyCondition(baseRow, input, |
| inputStateHandler.getCurrentJoinKey())) { |
| for (int i = 0; i < count; i++) { |
| joinedRow.replace(baseRow, input); |
| collector.collect(joinedRow); |
| } |
| } |
| } |
| if (tuple3.f2 <= currentTime && stateCleaningEnabled) { |
| //expire |
| iterator.remove(); |
| } |
| } |
| } |
| } |