m-trieu commented on code in PR #31902:
URL: https://github.com/apache/beam/pull/31902#discussion_r1757378364
##########
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/windmill/client/AbstractWindmillStream.java:
##########
@@ -290,12 +332,60 @@ private void setLastError(String error) {
lastErrorTime.set(DateTime.now());
}
+ protected abstract void shutdownInternal();
+
public static class WindmillStreamShutdownException extends RuntimeException
{
public WindmillStreamShutdownException(String message) {
super(message);
}
}
+ /**
+ * Request observer that allows resetting its internal delegate using the
given {@link
+ * #requestObserverSupplier}.
+ */
+ @ThreadSafe
+ private static class ResettableRequestObserver<RequestT> implements
StreamObserver<RequestT> {
+
+ private final Supplier<StreamObserver<RequestT>> requestObserverSupplier;
+
+ @GuardedBy("this")
+ private volatile @Nullable StreamObserver<RequestT>
delegateRequestObserver;
+
+ private ResettableRequestObserver(Supplier<StreamObserver<RequestT>>
requestObserverSupplier) {
+ this.requestObserverSupplier = requestObserverSupplier;
+ this.delegateRequestObserver = null;
+ }
+
+ private synchronized StreamObserver<RequestT> delegate() {
+ if (delegateRequestObserver == null) {
+ throw new NullPointerException(
Review Comment:
done
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
