LantaoJin commented on a change in pull request #24982: [SPARK-28181][CORE] Add
a filter interface to KVStore to speed up the entities retrieve
URL: https://github.com/apache/spark/pull/24982#discussion_r298248246
##########
File path:
common/kvstore/src/main/java/org/apache/spark/util/kvstore/InMemoryStore.java
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@@ -106,6 +106,12 @@ public void delete(Class<?> type, Object naturalKey) {
return list != null ? list.view() : emptyView();
}
+ @Override
+ public <T> KVStoreView<T> viewWithCondition(Class<T> type, Predicate<T>
condition) {
+ InstanceList<T> list = inMemoryLists.get(type);
Review comment:
I’ve tried like `view(Class<T> type, Optional<Predicate<T>> condition)`, but
how can I add a default parameter value in Java like `condition:
Option[Predicate[T]] = None` in Scala? Otherwise, it needs to change many
places so I choose to add a new function called `viewWithCondition`.
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