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[FLINK-35028][runtime] Timer firing under async execution model
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137 changes: 137 additions & 0 deletions
137
...src/main/java/org/apache/flink/streaming/api/operators/InternalTimerServiceAsyncImpl.java
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| Original file line number | Diff line number | Diff line change |
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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. | ||
| */ | ||
|
|
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| package org.apache.flink.streaming.api.operators; | ||
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|
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| import org.apache.flink.annotation.Internal; | ||
| import org.apache.flink.runtime.asyncprocessing.AsyncExecutionController; | ||
| import org.apache.flink.runtime.asyncprocessing.RecordContext; | ||
| import org.apache.flink.runtime.metrics.groups.TaskIOMetricGroup; | ||
| import org.apache.flink.runtime.state.KeyGroupRange; | ||
| import org.apache.flink.runtime.state.KeyGroupedInternalPriorityQueue; | ||
| import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService; | ||
| import org.apache.flink.streaming.runtime.tasks.StreamTaskCancellationContext; | ||
| import org.apache.flink.util.function.BiConsumerWithException; | ||
| import org.apache.flink.util.function.ThrowingRunnable; | ||
|
|
||
| /** | ||
| * An implementation of {@link InternalTimerService} that is used by {@link | ||
| * org.apache.flink.streaming.runtime.operators.asyncprocessing.AbstractAsyncStateStreamOperator}. | ||
| * The timer service will set {@link RecordContext} for the timers before invoking action to | ||
| * preserve the execution order between timer firing and records processing. | ||
| * | ||
| * @see <a | ||
| * href=https://cwiki.apache.org/confluence/display/FLINK/FLIP-425%3A+Asynchronous+Execution+Model#FLIP425:AsynchronousExecutionModel-Timers>FLIP-425 | ||
| * timers section.</a> | ||
| * @param <K> Type of timer's key. | ||
| * @param <N> Type of the namespace to which timers are scoped. | ||
| */ | ||
| @Internal | ||
| public class InternalTimerServiceAsyncImpl<K, N> extends InternalTimerServiceImpl<K, N> { | ||
|
|
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| private AsyncExecutionController<K> asyncExecutionController; | ||
|
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| InternalTimerServiceAsyncImpl( | ||
| TaskIOMetricGroup taskIOMetricGroup, | ||
| KeyGroupRange localKeyGroupRange, | ||
| KeyContext keyContext, | ||
| ProcessingTimeService processingTimeService, | ||
| KeyGroupedInternalPriorityQueue<TimerHeapInternalTimer<K, N>> processingTimeTimersQueue, | ||
| KeyGroupedInternalPriorityQueue<TimerHeapInternalTimer<K, N>> eventTimeTimersQueue, | ||
| StreamTaskCancellationContext cancellationContext, | ||
| AsyncExecutionController<K> asyncExecutionController) { | ||
| super( | ||
| taskIOMetricGroup, | ||
| localKeyGroupRange, | ||
| keyContext, | ||
| processingTimeService, | ||
| processingTimeTimersQueue, | ||
| eventTimeTimersQueue, | ||
| cancellationContext); | ||
| this.asyncExecutionController = asyncExecutionController; | ||
| } | ||
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| @Override | ||
| void onProcessingTime(long time) throws Exception { | ||
| // null out the timer in case the Triggerable calls registerProcessingTimeTimer() | ||
| // inside the callback. | ||
| nextTimer = null; | ||
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| InternalTimer<K, N> timer; | ||
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| while ((timer = processingTimeTimersQueue.peek()) != null | ||
| && timer.getTimestamp() <= time | ||
| && !cancellationContext.isCancelled()) { | ||
| processingTimeTimersQueue.poll(); | ||
| final InternalTimer<K, N> timerToTrigger = timer; | ||
| maintainContextAndProcess( | ||
| timerToTrigger, () -> triggerTarget.onProcessingTime(timerToTrigger)); | ||
| taskIOMetricGroup.getNumFiredTimers().inc(); | ||
| } | ||
|
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| if (timer != null && nextTimer == null) { | ||
| nextTimer = | ||
| processingTimeService.registerTimer( | ||
| timer.getTimestamp(), this::onProcessingTime); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Advance one watermark, this will fire some event timers. | ||
| * | ||
| * @param time the time in watermark. | ||
| */ | ||
| @Override | ||
| public void advanceWatermark(long time) throws Exception { | ||
| currentWatermark = time; | ||
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| InternalTimer<K, N> timer; | ||
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| while ((timer = eventTimeTimersQueue.peek()) != null | ||
| && timer.getTimestamp() <= time | ||
| && !cancellationContext.isCancelled()) { | ||
| eventTimeTimersQueue.poll(); | ||
| final InternalTimer<K, N> timerToTrigger = timer; | ||
| maintainContextAndProcess( | ||
| timerToTrigger, () -> triggerTarget.onEventTime(timerToTrigger)); | ||
| taskIOMetricGroup.getNumFiredTimers().inc(); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Iterator each timer in the queue, and invoke the consumer. This function is mainly used by | ||
| * state-processor-API. TODO: Ensure state-processor-API that only uses sync state API. | ||
| */ | ||
| protected void foreachTimer( | ||
| BiConsumerWithException<N, Long, Exception> consumer, | ||
| KeyGroupedInternalPriorityQueue<TimerHeapInternalTimer<K, N>> queue) | ||
| throws Exception { | ||
| throw new UnsupportedOperationException( | ||
| "Batch operation is not supported when using async state."); | ||
| } | ||
|
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| private void maintainContextAndProcess( | ||
| InternalTimer<K, N> timer, ThrowingRunnable<Exception> runnable) { | ||
| RecordContext<K> recordCtx = asyncExecutionController.buildContext(null, timer.getKey()); | ||
| recordCtx.retain(); | ||
| asyncExecutionController.setCurrentContext(recordCtx); | ||
| keyContext.setCurrentKey(timer.getKey()); | ||
| asyncExecutionController.syncPointRequestWithCallback(runnable); | ||
| recordCtx.release(); | ||
| } | ||
| } |
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