Technoboy- commented on code in PR #12258:
URL: https://github.com/apache/pulsar/pull/12258#discussion_r941009063
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managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedLedgerImpl.java:
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@@ -4144,4 +4156,41 @@ public void checkInactiveLedgerAndRollOver() {
}
}
+
+ public void checkCursorsToCacheEntries() {
+ if (minBacklogCursorsForCaching < 1) {
+ return;
+ }
+ Iterator<ManagedCursor> it = cursors.iterator();
+ Map<ManagedCursorImpl, Long> cursorBacklogMap = new HashMap<>();
+ while (it.hasNext()) {
+ ManagedCursorImpl cursor = (ManagedCursorImpl) it.next();
+ if (cursor.isDurable()) {
+ cursorBacklogMap.put(cursor, cursor.getNumberOfEntries());
+ }
+ }
+ int cursorsInSameBacklogRange = 0;
+ for (java.util.Map.Entry<ManagedCursorImpl, Long> cursor :
cursorBacklogMap.entrySet()) {
+ cursorsInSameBacklogRange = 0;
+ for (java.util.Map.Entry<ManagedCursorImpl, Long> other :
cursorBacklogMap.entrySet()) {
+ if (cursor.equals(other)) {
+ continue;
+ }
+ long backlog = cursor.getValue();
+ // if backlog difference is >
maxBacklogBetweenCursorsForCaching (eg: 10000) then cached entry might be
+ // invalidated by the time so, skip caching such long range
messages.
+ if (backlog < minBacklogEntriesForCaching) {
+ continue;
+ }
+ if (Math.abs(backlog - other.getValue()) <=
maxBacklogBetweenCursorsForCaching) {
+ cursorsInSameBacklogRange++;
+ }
+ }
+ cursor.getKey().setCacheReadEntry(cursorsInSameBacklogRange >=
minBacklogCursorsForCaching);
+ if (log.isDebugEnabled()) {
+ log.info("{} Enabling cache read = {} for {}", name,
Review Comment:
Oh, a mistake here.
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