heesung-sn commented on code in PR #23903:
URL: https://github.com/apache/pulsar/pull/23903#discussion_r1932612827
##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/util/RangeCache.java:
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@@ -106,7 +106,39 @@ K getKey() {
return localKey;
}
+ /**
+ * Get the value associated with the key. Returns null if the key does
not match the key.
+ *
+ * @param key the key to match
+ * @return the value associated with the key, or null if the value has
already been recycled or the key does not
+ * match
+ */
V getValue(K key) {
+ return getValueInternal(key, false);
+ }
+
+ /**
+ * Get the value associated with the Map.Entry's key and value. Exact
instance of the key is required to match.
+ * @param entry the entry which contains the key and {@link
EntryWrapper} value to get the value from
+ * @return the value associated with the key, or null if the value has
already been recycled or the key does not
+ * exactly match the same instance
+ */
+ static <K, V> V getValueMatchingMapEntry(Map.Entry<K, EntryWrapper<K,
V>> entry) {
+ return entry.getValue().getValueInternal(entry.getKey(), true);
+ }
+
+ /**
+ * Get the value associated with the key. Returns null if the key does
not match the key associated with the
+ * value.
+ *
+ * @param key the key to match
+ * @param requireSameKeyInstance when true, the matching will be
restricted to exactly the same instance of the
+ * key as the one stored in the wrapper.
This is used to avoid any races
+ * when retrieving or removing the
entries from the cache when the key and value
+ * instances are available.
+ * @return the value associated with the key, or null if the key does
not match
+ */
+ private V getValueInternal(K key, boolean requireSameKeyInstance) {
Review Comment:
@BewareMyPower I remember you argued that pulsar should stop abusing this
object pooling pattern. Wdyt?
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