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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2022/04/28 10:03:36 UTC
[GitHub] [pulsar] gaoran10 commented on a diff in pull request #15354: [improve][broker] Support shrink for ConcurrentSortedLongPairSet
gaoran10 commented on code in PR #15354:
URL: https://github.com/apache/pulsar/pull/15354#discussion_r860710232
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pulsar-common/src/main/java/org/apache/pulsar/common/util/collections/ConcurrentLongPairSet.java:
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@@ -469,20 +470,35 @@ private int removeIf(LongPairPredicate filter) {
int removedItems = 0;
// Go through all the buckets for this section
- for (int bucket = 0; bucket < table.length; bucket += 2) {
- long storedItem1 = table[bucket];
- long storedItem2 = table[bucket + 1];
-
- if (storedItem1 != DeletedItem && storedItem1 != EmptyItem) {
- if (filter.test(storedItem1, storedItem2)) {
- long h = hash(storedItem1, storedItem2);
- if (remove(storedItem1, storedItem2, (int) h)) {
+ long stamp = writeLock();
+ try {
+ for (int bucket = 0; bucket < table.length; bucket += 2) {
+ long storedItem1 = table[bucket];
+ long storedItem2 = table[bucket + 1];
+ if (storedItem1 != DeletedItem && storedItem1 != EmptyItem) {
+ if (filter.test(storedItem1, storedItem2)) {
+ SIZE_UPDATER.decrementAndGet(this);
+ cleanBucket(bucket);
removedItems++;
}
}
}
+ } finally {
+ if (autoShrink && size < resizeThresholdBelow) {
+ try {
+ int newCapacity = alignToPowerOfTwo((int) (capacity / shrinkFactor));
+ int newResizeThresholdUp = (int) (newCapacity * mapFillFactor);
+ if (newCapacity < capacity && newResizeThresholdUp > size) {
+ // shrink the hashmap
+ rehash(newCapacity);
+ }
+ } finally {
+ unlockWrite(stamp);
+ }
+ } else {
+ unlockWrite(stamp);
+ }
Review Comment:
Could we reuse this block?
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