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;
}
public Optional<byte[]> get(
Optional<String> table,
Optional<String> family,
Optional<String> qualifier,
Optional<String> key) {
if (!valid) {
Logger.error("CANNOT GET! NO VALID CONNECTION");
return Optional.empty();
}
if (table.isPresent()
&& family.isPresent()
&& qualifier.isPresent()
&& key.isPresent()
&& !key.get().isEmpty()) {
try {
final Table htable = connection.getTable(TableName.valueOf(table.get()));
Result result = htable.get(new Get(key.get().getBytes("UTF8")));
return Optional.ofNullable(
result.getValue(family.get().getBytes("UTF8"), qualifier.get().getBytes("UTF8")));
} catch (IOException e) {
e.printStackTrace();
}
}
return Optional.empty();
}
public void putBatch(Optional<List<Request>> putRequests, boolean optimize) {
if (!valid) {
Logger.error("CANNOT PUT! NO VALID CONNECTION");
return;
}
List<Put> puts = new ArrayList<>();
if (putRequests.isPresent() && !putRequests.get().isEmpty()) {
String tableName = putRequests.get().get(0).table;
putRequests
.get()
.forEach(
pr ->
pr.getPut()
.ifPresent(
p -> {
if (optimize) {
p.setDurability(Durability.SKIP_WAL);
}
puts.add(p);
}));
try {
final Table table = connection.getTable(TableName.valueOf(tableName));
if (optimize && table instanceof HTable) {
((HTable) table).setAutoFlush(false, true);
}
table.put(puts);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public Optional<Response> get(Optional<Request> request) {
if (!valid) {
Logger.error("CANNOT GET! NO VALID CONNECTION");
return Optional.empty();
}
Response response = new Response();
if (request.isPresent()) {
Request r = request.get();
response.key = r.key;
response.table = r.table;
try {
final Table htable = connection.getTable(TableName.valueOf(r.table));
Result result = htable.get(new Get(r.key));
if (result == null || result.isEmpty()) {
return Optional.empty();
}
r.columns.forEach(
c ->
response.columns.add(
new Request.Column(
c.family,
c.qualifier,
result.getValue(c.family.getBytes(), c.qualifier.getBytes()))));
} catch (IOException e) {
e.printStackTrace();
}
}
return Optional.of(response);
}
public boolean tableExists(String tableName) {
try {
Admin admin = connection.getAdmin();
return admin.tableExists(TableName.valueOf(tableName));
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
public void put(String tablename, Put p) {
try {
final Table table = connection.getTable(TableName.valueOf(tablename));
table.put(p);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public Result get(String table, String family, byte[] key) {
final Table htable;
try {
htable = connection.getTable(TableName.valueOf(table));
return htable.get(new Get(key));
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public void createTable(String tableName, List<String> columnFamilies) {
try {
Admin admin = connection.getAdmin();
HTableDescriptor descriptor = new HTableDescriptor(TableName.valueOf(tableName));
for (String family : columnFamilies) {
descriptor.addFamily(new HColumnDescriptor(family));
}
admin.createTable(descriptor);
} catch (IOException e) {
e.printStackTrace();
}
}
public boolean removeTable(String tableName) {
try {
Admin admin = connection.getAdmin();
TableName t = TableName.valueOf(tableName);
if (admin.tableExists(t)) {
admin.disableTable(t);
admin.deleteTable(t);
return true;
}
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
public void scan(
Consumer<Result> callback, String tableName, String columnFamily, String... qualifiers) {
if (callback != null && tableName != null && columnFamily != null && qualifiers != null) {
Scan s = new Scan();
byte[] family = Bytes.toBytes(columnFamily);
for (String qualifier : qualifiers) {
s.addColumn(family, Bytes.toBytes(qualifier));
}
try {
final Table table = connection.getTable(TableName.valueOf(tableName));
ResultScanner scanner = table.getScanner(s);
for (Result r = scanner.next(); r != null; r = scanner.next()) {
callback.accept(r);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void put(Optional<Request> putRequest) {
if (!valid) {
Logger.error("CANNOT PUT! NO VALID CONNECTION");
return;
}
putRequest.ifPresent(
pr ->
pr.getPut()
.ifPresent(
p -> {
try {
final Table table = connection.getTable(TableName.valueOf(pr.table));
table.put(p);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}));
}