kl0u commented on a change in pull request #13596: URL: https://github.com/apache/flink/pull/13596#discussion_r504464557
########## File path: flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/sorted/state/BatchExecutionInternalTimeService.java ########## @@ -0,0 +1,153 @@ +/* + * 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.streaming.api.operators.sorted.state; + +import org.apache.flink.runtime.state.KeyGroupedInternalPriorityQueue; +import org.apache.flink.runtime.state.PriorityComparator; +import org.apache.flink.streaming.api.operators.InternalTimer; +import org.apache.flink.streaming.api.operators.InternalTimerService; +import org.apache.flink.streaming.api.operators.TimerHeapInternalTimer; +import org.apache.flink.streaming.api.operators.Triggerable; +import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService; +import org.apache.flink.util.function.BiConsumerWithException; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import static org.apache.flink.util.Preconditions.checkNotNull; + +/** + * An implementation of a {@link InternalTimerService} that manages timers with a single active key at a time. + * Can be used in a BATCH execution mode. + */ +public class BatchExecutionInternalTimeService<K, N> implements InternalTimerService<N> { + private static final Logger LOG = LoggerFactory.getLogger(BatchExecutionInternalTimeService.class); + + private final ProcessingTimeService processingTimeService; + + /** + * Processing time timers that are currently in-flight. + */ + private final KeyGroupedInternalPriorityQueue<TimerHeapInternalTimer<K, N>> processingTimeTimersQueue; + + /** + * Event time timers that are currently in-flight. + */ + private final KeyGroupedInternalPriorityQueue<TimerHeapInternalTimer<K, N>> eventTimeTimersQueue; + + /** + * The local event time, as denoted by the last received + * {@link org.apache.flink.streaming.api.watermark.Watermark Watermark}. + */ + private long currentWatermark = Long.MIN_VALUE; + + private final Triggerable<K, N> triggerTarget; + + private K currentKey; + + BatchExecutionInternalTimeService( + ProcessingTimeService processingTimeService, + Triggerable<K, N> triggerTarget) { + + this.processingTimeService = checkNotNull(processingTimeService); + this.triggerTarget = checkNotNull(triggerTarget); + + this.processingTimeTimersQueue = new BatchExecutionInternalPriorityQueueSet<>( + PriorityComparator.forPriorityComparableObjects(), + 128 + ); + this.eventTimeTimersQueue = new BatchExecutionInternalPriorityQueueSet<>( + PriorityComparator.forPriorityComparableObjects(), + 128 + ); + } + + @Override + public long currentProcessingTime() { + return processingTimeService.getCurrentProcessingTime(); + } + + @Override + public long currentWatermark() { + return currentWatermark; + } + + @Override + public void registerProcessingTimeTimer(N namespace, long time) { + // the currentWatermark == Long.MAX_VALUE indicates the timer was registered from the callback + // we quiesce the TimerService to prohibit infinite loops at the end of a key + if (currentWatermark == Long.MAX_VALUE) { + LOG.warn("Timer service is quiesced. Processing time timer for timestamp '{}' will be ignored.", time); + return; + } + processingTimeTimersQueue.add(new TimerHeapInternalTimer<>(time, currentKey, namespace)); + } + + @Override + public void registerEventTimeTimer(N namespace, long time) { + // the currentWatermark == Long.MAX_VALUE indicates the timer was registered from the callback + // we quiesce the TimerService to prohibit infinite loops at the end of a key + if (currentWatermark == Long.MAX_VALUE) { + LOG.warn("Timer service is quiesced. Event time timer for timestamp '{}' will be ignored.", time); + return; + } + eventTimeTimersQueue.add(new TimerHeapInternalTimer<>(time, currentKey, namespace)); + } + + @Override + public void deleteProcessingTimeTimer(N namespace, long time) { + processingTimeTimersQueue.remove(new TimerHeapInternalTimer<>(time, currentKey, namespace)); + } + + @Override + public void deleteEventTimeTimer(N namespace, long time) { + eventTimeTimersQueue.remove(new TimerHeapInternalTimer<>(time, currentKey, namespace)); + } + + @Override + public void forEachEventTimeTimer(BiConsumerWithException<N, Long, Exception> consumer) { + throw new UnsupportedOperationException( + "The BatchExecutionInternalTimeService should not be used in State Processor API."); + } + + @Override + public void forEachProcessingTimeTimer(BiConsumerWithException<N, Long, Exception> consumer) { + throw new UnsupportedOperationException( + "The BatchExecutionInternalTimeService should not be used in State Processor API."); + } + + public void setCurrentKey(K currentKey) throws Exception { + if (currentKey != null && currentKey.equals(this.currentKey)) { + return; + } + + currentWatermark = Long.MAX_VALUE; + InternalTimer<K, N> timer; + while ((timer = eventTimeTimersQueue.peek()) != null) { Review comment: I think that these can become: ``` while ((timer = eventTimeTimersQueue.poll()) != null) { triggerTarget.onEventTime(timer); } ``` and the same for the processing time. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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