lhotari commented on code in PR #24938:
URL: https://github.com/apache/pulsar/pull/24938#discussion_r2518542814
##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java:
##########
@@ -1453,6 +1453,23 @@ public Position getFirstPosition() {
return firstLedgerId == null ? null :
PositionFactory.create(firstLedgerId, 0);
}
+ /**
+ * Compare two positions. It is different with {@link
Position#compareTo(Position)} when the params are invalid.
+ * For example: position-1 is "1:{latest entry}", and position-2 is "2:0",
they are the same position.
+ */
+ private int comparePositions(Position pos1, Position pos2) {
+ if (pos1 == null || pos2 == null) {
+ throw new IllegalArgumentException("Positions must not be null");
+ }
+ if (pos1.getLedgerId() == pos2.getLedgerId() && pos1.getEntryId() ==
pos2.getEntryId()) {
+ return 0;
+ }
+ if (!ledger.isValidPosition(pos1) || !ledger.isValidPosition(pos2)) {
+ return
ledger.getNextValidPosition(pos1).compareTo(ledger.getNextValidPosition(pos2));
+ }
Review Comment:
> And the following code you shared has changed the object that was used to
compare, which is wrong
Why is it wrong? Explaining that in more detail could help understand the
purpose of your code.
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