[HBASE-24821] Simplify the logic of getRegionInfo in TestFlushFromClient to reduce redundancy code

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.3.1, 2.4.0, 2.2.6
• Component/s: test
• Hadoop Flags: Reviewed
• Assignee: Zheng Wang
• Reporter: Zheng Wang
• Created: 05/Aug/20 06:43
• Updated: 26/Aug/20 05:48
• Resolved: 05/Aug/20 14:42

Description

Current logic:

  private List<HRegion> getRegionInfo() {
    return TEST_UTIL.getHBaseCluster().getLiveRegionServerThreads().stream()
      .map(JVMClusterUtil.RegionServerThread::getRegionServer)
      .flatMap(r -> r.getRegions().stream())
      .filter(r -> r.getTableDescriptor().getTableName().equals(tableName))
      .collect(Collectors.toList());
  }

The MiniHBaseCluster has similar method to do same thing.
So it could just directly call:

  private List<HRegion> getRegionInfo() {
    return TEST_UTIL.getHBaseCluster().getRegions(tableName);
  }

Issue Links

• links to: GitHub Pull Request #2200