public Map<String, Long> getRegionSizes(String tableName) {
Map<String, Long> regions = new HashMap<>();
try {
final Table table = connection.getTable(TableName.valueOf(tableName));
RegionLocator regionLocator = connection.getRegionLocator(table.getName());
List<HRegionLocation> tableRegionInfos = regionLocator.getAllRegionLocations();
Set<byte[]> tableRegions = new TreeSet<byte[]>(Bytes.BYTES_COMPARATOR);
for (HRegionLocation regionInfo : tableRegionInfos) {
tableRegions.add(regionInfo.getRegionInfo().getRegionName());
}
ClusterStatus clusterStatus = connection.getAdmin().getClusterStatus();
Collection<ServerName> servers = clusterStatus.getServers();
final long megaByte = 1024L * 1024L;
for (ServerName serverName : servers) {
ServerLoad serverLoad = clusterStatus.getLoad(serverName);
for (RegionLoad regionLoad : serverLoad.getRegionsLoad().values()) {
byte[] regionId = regionLoad.getName();
if (tableRegions.contains(regionId)) {
long regionSizeBytes = regionLoad.getStorefileSizeMB() * megaByte;
regions.put(regionLoad.getNameAsString(), regionSizeBytes);
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
return regions;
}
protected ArrayList<HRegionInfo> getRegionInfoList(String tableName) throws IOException {
Set<HRegionInfo> hRegionInfoSet = new TreeSet<>();
try (HTable table = new HTable(conf, tableName)) {
hRegionInfoSet.addAll(table.getRegionLocations().keySet());
}
return new ArrayList<>(hRegionInfoSet);
}