Apache9 commented on a change in pull request #673: HBASE-23093 : Avoid
Optional Anti-Pattern where possible
URL: https://github.com/apache/hbase/pull/673#discussion_r332417741
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java
##########
@@ -275,7 +276,7 @@ public int getFlushQueueSize() {
@Override
public long getBlockCacheCount() {
- return this.blockCache.map(BlockCache::getBlockCount).orElse(0L);
+ return this.blockCache != null ? this.blockCache.getBlockCount() : 0L;
Review comment:
The intention here is that, the method we use to get these values returns an
Optional, so I do not think it is necessary to unwrap them and then explicitly
using null checks to do computation... What we should avoid is calling
Optional.of before calling a method, which introduces extra object creation and
null comparison.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
