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https://issues.apache.org/jira/browse/BEAM-4681?focusedWorklogId=165873&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-165873
]
ASF GitHub Bot logged work on BEAM-4681:
----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Nov/18 12:29
Start Date: 14/Nov/18 12:29
Worklog Time Spent: 10m
Work Description: robertwb commented on a change in pull request #6981:
[BEAM-4681] Add support for portable timers in Flink streaming mode
URL: https://github.com/apache/beam/pull/6981#discussion_r233426740
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/ExecutableStageDoFnOperator.java
##########
@@ -359,13 +534,100 @@ public void finishBundle() {
emitResults();
} catch (Exception e) {
throw new RuntimeException("Failed to finish remote bundle", e);
+ } finally {
+ remoteBundle = null;
+ }
+ if (bundleFinishedCallback != null) {
+ bundleFinishedCallback.run();
+ bundleFinishedCallback = null;
}
}
+ /** Key for timer which has not been registered yet. */
+ Object getTimerKeyForRegistration() {
+ return keyForTimerToBeSet;
+ }
+
+ /** Key for timer which is about to be fired. */
+ void setTimerKeyForFire(Object key) {
+ this.keyForTimerToBeFired = key;
+ }
+
+ boolean isBundleInProgress() {
+ return remoteBundle != null;
+ }
+
+ void setBundleFinishedCallback(Runnable callback) {
+ this.bundleFinishedCallback = callback;
+ }
+
private void emitResults() {
KV<String, OutputT> result;
while ((result = outputQueue.poll()) != null) {
- outputManager.output(outputMap.get(result.getKey()), (WindowedValue)
result.getValue());
+ final String outputPCollectionId =
Preconditions.checkNotNull(result.getKey());
+ TupleTag<?> tag = outputMap.get(outputPCollectionId);
+ WindowedValue windowedValue =
+ Preconditions.checkNotNull(
+ (WindowedValue) result.getValue(),
+ "Received a null value from the SDK harness for %s",
+ outputPCollectionId);
+ if (tag != null) {
+ // process regular elements
+ outputManager.output(tag, windowedValue);
+ } else {
+ final String timerCollectionId =
extractTimerPCollectionId(outputPCollectionId);
+ TimerSpec timerSpec = extractTimerSpec(timerCollectionId);
+ Timer timer =
+ Preconditions.checkNotNull(
+ (Timer) ((KV) windowedValue.getValue()).getValue(),
+ "Received null Timer from SDK harness: %s",
+ windowedValue);
+ LOG.debug("Timer received: {} {}", outputPCollectionId, timer);
+ for (Object window : windowedValue.getWindows()) {
+ StateNamespace namespace = StateNamespaces.window(windowCoder,
(BoundedWindow) window);
+ TimerInternals.TimerData timerData =
+ TimerInternals.TimerData.of(
+ timerCollectionId, namespace, timer.getTimestamp(),
timerSpec.getTimeDomain());
Review comment:
The notion "timerCollectionId" is ambiguous, as timers are associated with
two distinct PCollections at execution time.
Timers are absolutely determined by their transform name and local name;
probably it makes sense to use that (let's call it fullyQualifiedTimerName) for
the TimerData here, and then also have a mapping fullyQualifiedTimerName ->
timerInputPCollectionId for plumbing timers to the SDK, and a map
timerOutputPCollectionId -> fullyQualifiedTimerName for recording timers from
the SDK (like we do here).
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Issue Time Tracking
-------------------
Worklog Id: (was: 165873)
Time Spent: 16h 10m (was: 16h)
> Integrate support for timers using the portability APIs into Flink
> ------------------------------------------------------------------
>
> Key: BEAM-4681
> URL: https://issues.apache.org/jira/browse/BEAM-4681
> Project: Beam
> Issue Type: Sub-task
> Components: runner-flink
> Reporter: Luke Cwik
> Assignee: Maximilian Michels
> Priority: Major
> Labels: portability, portability-flink
> Time Spent: 16h 10m
> Remaining Estimate: 0h
>
> Consider using the code produced in BEAM-4658 to support timers.
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