drcrallen commented on a change in pull request #6629: Add support parallel
combine in brokers
URL: https://github.com/apache/incubator-druid/pull/6629#discussion_r240734226
##########
File path: core/src/main/java/org/apache/druid/collections/BlockingPool.java
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@@ -24,8 +24,21 @@
public interface BlockingPool<T>
{
+ /**
+ * Returns the total pool size.
+ */
int maxSize();
+ /**
+ * Returns the number of current available resources.
+ */
+ int available();
+
+ /**
+ * Poll all available resources from the pool. If there's no available
resource, it returns an empty list.
Review comment:
The `BlockingQueue` interface has a `drainTo` method that does something
similar. Can you add documentation on how the behavior of this method is
similar or different compared to `drainTo`?
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