iamaleksey commented on code in PR #2982:
URL: https://github.com/apache/cassandra/pull/2982#discussion_r1450642275
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src/java/org/apache/cassandra/service/accord/AccordJournal.java:
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@@ -699,6 +1003,246 @@ private static int msVersion(int version)
}
}
+ /*
+ * Record framing logic
+ */
+
+ private final class FrameAggregator implements Interruptible.Task
+ {
+ /* external MPSC pending request queue */
+ private final ManyToOneConcurrentLinkedQueue<PendingRequest>
unframedRequests = new ManyToOneConcurrentLinkedQueue<>();
+
+ private final LongArrayList waitForEpochs = new LongArrayList();
+ private final Long2ObjectHashMap<ArrayList<PendingRequest>>
delayedRequests = new Long2ObjectHashMap<>();
+
+ private volatile Interruptible executor;
+
+ // a signal and flag that callers outside the aggregator thread can use
+ // to signal they want the aggregator to run again
+ private final Semaphore haveWork = newSemaphore(1);
+
+ void onWrite(Pointer pointer, RequestContext context)
+ {
+ unframedRequests.add(new PendingRequest(pointer, context));
Review Comment:
Good call. Implemented without going too hard.
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