merlimat commented on a change in pull request #3732: [pulsar-broker] Optimize
message replay for large backlog consumer
URL: https://github.com/apache/pulsar/pull/3732#discussion_r261814760
##########
File path:
pulsar-common/src/main/java/org/apache/pulsar/common/util/collections/ConcurrentLongPairSet.java
##########
@@ -190,11 +187,16 @@ public int removeIf(LongPairPredicate filter) {
* @return a new list of keys with max provided numberOfItems (makes a
copy)
*/
public Set<LongPair> items(int numberOfItems) {
- Set<LongPair> items = new HashSet<>();
+ return items(numberOfItems, (item1, item2) -> new LongPair(item1,
item2));
+ }
+
+ @Override
+ public <T> Set<T> items(int numberOfItems, BiFunction<Long, Long, T>
longPairConverter) {
Review comment:
If we use some kind a specialized interface we can avoid 2 `long` -> `Long`
conversions:
```java
interface LongPairFunction<T> {
T apply(long a, long b);
}
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