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[FLINK-33202][runtime] Support switching from batch to stream mode to…
… improve throughput when processing backlog data
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34 changes: 34 additions & 0 deletions
34
flink-runtime/src/main/java/org/apache/flink/runtime/source/event/BacklogEvent.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /* | ||
| * 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.runtime.source.event; | ||
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| import org.apache.flink.runtime.operators.coordination.OperatorEvent; | ||
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| /** A source event that notify the source operator of the backlog status. */ | ||
| public class BacklogEvent implements OperatorEvent { | ||
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| private final boolean backlog; | ||
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| public BacklogEvent(boolean backlog) { | ||
| this.backlog = backlog; | ||
| } | ||
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| public boolean isBacklog() { | ||
| return backlog; | ||
| } | ||
| } |
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91 changes: 91 additions & 0 deletions
91
...aming-java/src/main/java/org/apache/flink/streaming/api/operators/BacklogTimeService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| * 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.streaming.api.operators; | ||
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| import org.apache.flink.runtime.state.KeyGroupedInternalPriorityQueue; | ||
| import org.apache.flink.streaming.api.operators.sorted.state.BatchExecutionInternalTimeService; | ||
| import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService; | ||
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| import java.util.LinkedList; | ||
| import java.util.List; | ||
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| /** | ||
| * An implementation of a {@link InternalTimerService} that manages timers with a single active key | ||
| * at a time. This is used by {@link | ||
| * org.apache.flink.streaming.api.operators.InternalBacklogAwareTimerServiceImpl} during backlog | ||
| * processing. | ||
| */ | ||
| class BacklogTimeService<K, N> extends BatchExecutionInternalTimeService<K, N> { | ||
| private long maxWatermarkDuringBacklog; | ||
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| public BacklogTimeService( | ||
| ProcessingTimeService processingTimeService, | ||
| Triggerable<K, N> triggerTarget, | ||
| KeyGroupedInternalPriorityQueue<TimerHeapInternalTimer<K, N>> eventTimeTimersQueue) { | ||
| super(processingTimeService, triggerTarget, eventTimeTimersQueue, null); | ||
| } | ||
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| @Override | ||
| public void registerProcessingTimeTimer(N namespace, long time) { | ||
| throw new UnsupportedOperationException( | ||
| "BacklogTimeService does not support registering processing timer."); | ||
| } | ||
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| @Override | ||
| public void deleteProcessingTimeTimer(N namespace, long time) { | ||
| throw new UnsupportedOperationException( | ||
| "BacklogTimeService does not support deleting processing timer."); | ||
| } | ||
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| /** | ||
| * Set the current key of the time service. If the new key is different from the last key, all | ||
| * the event time timers of the last key whose timestamp is less than or equal to the max | ||
| * watermark during backlog are triggered. | ||
| */ | ||
| public void setCurrentKey(K newKey) throws Exception { | ||
| if (newKey != null && newKey.equals(currentKey)) { | ||
| return; | ||
| } | ||
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| TimerHeapInternalTimer<K, N> timer; | ||
| List<TimerHeapInternalTimer<K, N>> skippedTimers = new LinkedList<>(); | ||
| if (currentKey != null) { | ||
| while ((timer = eventTimeTimersQueue.peek()) != null | ||
| && timer.getTimestamp() <= maxWatermarkDuringBacklog) { | ||
| eventTimeTimersQueue.poll(); | ||
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| if (timer.getKey() != currentKey) { | ||
| skippedTimers.add(timer); | ||
| } else { | ||
| triggerTarget.onEventTime(timer); | ||
| } | ||
| } | ||
| eventTimeTimersQueue.addAll(skippedTimers); | ||
| } | ||
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| if (newKey == null) { | ||
| currentWatermark = maxWatermarkDuringBacklog; | ||
| } | ||
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| currentKey = newKey; | ||
| } | ||
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| public void setMaxWatermarkDuringBacklog(long watermark) { | ||
| maxWatermarkDuringBacklog = watermark; | ||
| } | ||
| } |
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