AsyncAdmin (Apache HBase - Client 2.0.0-alpha2 API)

All Known Implementing Classes:

AsyncHBaseAdmin, RawAsyncHBaseAdmin
```
@InterfaceAudience.Public
public interface AsyncAdmin
```
The asynchronous administrative API for HBase.
This feature is still under development, so marked as IA.Private. Will change to public when done. Use it with caution.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
Modifier and Type	Method and Description
`CompletableFuture<Boolean>`	`abortProcedure(long procId, boolean mayInterruptIfRunning)` abort a procedure
`CompletableFuture<Void>`	`addColumnFamily(TableName tableName, ColumnFamilyDescriptor columnFamily)` Add a column family to an existing table.
`CompletableFuture<Void>`	`addReplicationPeer(String peerId, ReplicationPeerConfig peerConfig)` Add a new replication peer for replicating data to slave cluster
`CompletableFuture<Void>`	`appendReplicationPeerTableCFs(String peerId, Map<TableName,? extends Collection<String>> tableCfs)` Append the replicable table-cf config of the specified peer
`CompletableFuture<Void>`	`assign(byte[] regionName)`
`default CompletableFuture<Boolean>`	`balance()` Invoke the balancer.
`CompletableFuture<Boolean>`	`balance(boolean forcible)` Invoke the balancer.
`CompletableFuture<Void>`	`clearCompactionQueues(ServerName serverName, Set<String> queues)` Clear compacting queues on a region server.
`CompletableFuture<Void>`	`cloneSnapshot(String snapshotName, TableName tableName)` Create a new table by cloning the snapshot content.
`CompletableFuture<Boolean>`	`closeRegion(byte[] regionName, Optional<ServerName> serverName)` Deprecated. As of release 2.0.0, this will be removed in HBase 3.0.0 (HBASE-18231). Use `unassign(byte[], boolean)`.
`default CompletableFuture<Void>`	`compact(TableName tableName)` Compact a table.
`CompletableFuture<Void>`	`compact(TableName tableName, Optional<byte[]> columnFamily)` Compact a column family within a table.
`default CompletableFuture<Void>`	`compactRegion(byte[] regionName)` Compact an individual region.
`CompletableFuture<Void>`	`compactRegion(byte[] regionName, Optional<byte[]> columnFamily)` Compact a column family within a region.
`CompletableFuture<Void>`	`compactRegionServer(ServerName serverName)` Compact all regions on the region server.
`<S,R> CompletableFuture<R>`	`coprocessorService(Function<com.google.protobuf.RpcChannel,S> stubMaker, RawAsyncTable.CoprocessorCallable<S,R> callable)` Execute the given coprocessor call on the master.
`<S,R> CompletableFuture<R>`	`coprocessorService(Function<com.google.protobuf.RpcChannel,S> stubMaker, RawAsyncTable.CoprocessorCallable<S,R> callable, ServerName serverName)` Execute the given coprocessor call on the given region server.
`CompletableFuture<Void>`	`createNamespace(NamespaceDescriptor descriptor)` Create a new namespace.
`default CompletableFuture<Void>`	`createTable(TableDescriptor desc)` Creates a new table.
`CompletableFuture<Void>`	`createTable(TableDescriptor desc, byte[] startKey, byte[] endKey, int numRegions)` Creates a new table with the specified number of regions.
`CompletableFuture<Void>`	`createTable(TableDescriptor desc, Optional<byte[][]> splitKeys)` Creates a new table with an initial set of empty regions defined by the specified split keys.
`CompletableFuture<Void>`	`deleteColumnFamily(TableName tableName, byte[] columnFamily)` Delete a column family from a table.
`CompletableFuture<Void>`	`deleteNamespace(String name)` Delete an existing namespace.
`CompletableFuture<Void>`	`deleteSnapshot(String snapshotName)` Delete an existing snapshot.
`default CompletableFuture<Void>`	`deleteSnapshots(Pattern pattern)` Delete existing snapshots whose names match the pattern passed.
`CompletableFuture<Void>`	`deleteTable(TableName tableName)` Deletes a table.
`CompletableFuture<List<TableDescriptor>>`	`deleteTables(Pattern pattern)` Delete tables matching the passed in pattern and wait on completion.
`CompletableFuture<Void>`	`deleteTableSnapshots(Pattern tableNamePattern, Pattern snapshotNamePattern)` Delete all existing snapshots matching the given table name regular expression and snapshot name regular expression.
`CompletableFuture<Void>`	`disableReplicationPeer(String peerId)` Stop the replication stream to the specified peer
`CompletableFuture<Void>`	`disableTable(TableName tableName)` Disable a table.
`CompletableFuture<List<TableDescriptor>>`	`disableTables(Pattern pattern)` Disable tables matching the passed in pattern.
`CompletableFuture<Void>`	`drainRegionServers(List<ServerName> servers)` Mark a region server as draining to prevent additional regions from getting assigned to it.
`CompletableFuture<Void>`	`enableReplicationPeer(String peerId)` Restart the replication stream to the specified peer
`CompletableFuture<Void>`	`enableTable(TableName tableName)` Enable a table.
`CompletableFuture<List<TableDescriptor>>`	`enableTables(Pattern pattern)` Enable tables matching the passed in pattern.
`CompletableFuture<Void>`	`execProcedure(String signature, String instance, Map<String,String> props)` Execute a distributed procedure on a cluster.
`CompletableFuture<byte[]>`	`execProcedureWithRet(String signature, String instance, Map<String,String> props)` Execute a distributed procedure on a cluster.
`CompletableFuture<Void>`	`flush(TableName tableName)` Flush a table.
`CompletableFuture<Void>`	`flushRegion(byte[] regionName)` Flush an individual region.
`CompletableFuture<Pair<Integer,Integer>>`	`getAlterStatus(TableName tableName)` Get the status of alter command - indicates how many regions have received the updated schema Asynchronous operation.
`default CompletableFuture<Collection<ServerName>>`	`getBackupMasters()`
`CompletableFuture<ClusterStatus>`	`getClusterStatus()`
`CompletableFuture<ClusterStatus>`	`getClusterStatus(ClusterStatus.Options options)`
`CompletableFuture<CompactionState>`	`getCompactionState(TableName tableName)` Get the current compaction state of a table.
`CompletableFuture<CompactionState>`	`getCompactionStateForRegion(byte[] regionName)` Get the current compaction state of region.
`CompletableFuture<Optional<Long>>`	`getLastMajorCompactionTimestamp(TableName tableName)` Get the timestamp of the last major compaction for the passed table.
`CompletableFuture<Optional<Long>>`	`getLastMajorCompactionTimestampForRegion(byte[] regionName)` Get the timestamp of the last major compaction for the passed region.
`default CompletableFuture<ServerName>`	`getMaster()`
`CompletableFuture<NamespaceDescriptor>`	`getNamespaceDescriptor(String name)` Get a namespace descriptor by name
`CompletableFuture<List<HRegionInfo>>`	`getOnlineRegions(ServerName serverName)` Get all the online regions on a region server.
`CompletableFuture<List<QuotaSettings>>`	`getQuota(QuotaFilter filter)` List the quotas based on the filter.
`default CompletableFuture<List<RegionLoad>>`	`getRegionLoads(ServerName serverName)` Get a list of `RegionLoad` of all regions hosted on a region seerver.
`CompletableFuture<List<RegionLoad>>`	`getRegionLoads(ServerName serverName, Optional<TableName> tableName)` Get a list of `RegionLoad` of all regions hosted on a region seerver for a table.
`default CompletableFuture<Collection<ServerName>>`	`getRegionServers()`
`CompletableFuture<ReplicationPeerConfig>`	`getReplicationPeerConfig(String peerId)` Returns the configured ReplicationPeerConfig for the specified peer
`CompletableFuture<List<SecurityCapability>>`	`getSecurityCapabilities()`
`CompletableFuture<TableDescriptor>`	`getTableDescriptor(TableName tableName)` Method for getting the tableDescriptor
`CompletableFuture<List<HRegionInfo>>`	`getTableRegions(TableName tableName)` Get the regions of a given table.
`CompletableFuture<Boolean>`	`isBalancerOn()` Query the current state of the balancer.
`CompletableFuture<Boolean>`	`isCatalogJanitorOn()` Query on the catalog janitor state.
`CompletableFuture<Boolean>`	`isCleanerChoreOn()` Query the current state of the cleaner chore.
`CompletableFuture<Boolean>`	`isMasterInMaintenanceMode()` Check whether master is in maintenance mode
`CompletableFuture<Boolean>`	`isMergeOn()` Query the current state of the Merge switch.
`CompletableFuture<Boolean>`	`isNormalizerOn()` Query the current state of the region normalizer
`CompletableFuture<Boolean>`	`isProcedureFinished(String signature, String instance, Map<String,String> props)` Check the current state of the specified procedure.
`CompletableFuture<Boolean>`	`isSnapshotFinished(SnapshotDescription snapshot)` Check the current state of the passed snapshot.
`CompletableFuture<Boolean>`	`isSplitOn()` Query the current state of the Split switch.
`default CompletableFuture<Boolean>`	`isTableAvailable(TableName tableName)`
`CompletableFuture<Boolean>`	`isTableAvailable(TableName tableName, byte[][] splitKeys)` Use this api to check if the table has been created with the specified number of splitkeys which was used while creating the given table.
`CompletableFuture<Boolean>`	`isTableDisabled(TableName tableName)`
`CompletableFuture<Boolean>`	`isTableEnabled(TableName tableName)`
`CompletableFuture<List<ServerName>>`	`listDrainingRegionServers()` List region servers marked as draining to not get additional regions assigned to them.
`CompletableFuture<List<NamespaceDescriptor>>`	`listNamespaceDescriptors()` List available namespace descriptors
`CompletableFuture<List<LockInfo>>`	`listProcedureLocks()` List procedure locks.
`CompletableFuture<List<ProcedureInfo>>`	`listProcedures()` List procedures
`CompletableFuture<List<TableCFs>>`	`listReplicatedTableCFs()` Find all table and column families that are replicated from this cluster
`default CompletableFuture<List<ReplicationPeerDescription>>`	`listReplicationPeers()` Return a list of replication peers.
`CompletableFuture<List<ReplicationPeerDescription>>`	`listReplicationPeers(Optional<Pattern> pattern)` Return a list of replication peers.
`default CompletableFuture<List<SnapshotDescription>>`	`listSnapshots()` List completed snapshots.
`CompletableFuture<List<SnapshotDescription>>`	`listSnapshots(Optional<Pattern> pattern)` List all the completed snapshots matching the given pattern.
`default CompletableFuture<List<TableName>>`	`listTableNames()` List all of the names of userspace tables.
`CompletableFuture<List<TableName>>`	`listTableNames(Optional<Pattern> pattern, boolean includeSysTables)` List all of the names of userspace tables.
`default CompletableFuture<List<TableDescriptor>>`	`listTables()` List all the userspace tables.
`CompletableFuture<List<TableDescriptor>>`	`listTables(Optional<Pattern> pattern, boolean includeSysTables)` List all the tables matching the given pattern.
`CompletableFuture<List<SnapshotDescription>>`	`listTableSnapshots(Pattern tableNamePattern, Pattern snapshotNamePattern)` List all the completed snapshots matching the given table name regular expression and snapshot name regular expression.
`default CompletableFuture<Void>`	`majorCompact(TableName tableName)` Major compact a table.
`CompletableFuture<Void>`	`majorCompact(TableName tableName, Optional<byte[]> columnFamily)` Major compact a column family within a table.
`default CompletableFuture<Void>`	`majorCompactRegion(byte[] regionName)` Major compact a region.
`CompletableFuture<Void>`	`majorCompactRegion(byte[] regionName, Optional<byte[]> columnFamily)` Major compact a column family within region.
`CompletableFuture<Void>`	`majorCompactRegionServer(ServerName serverName)` Compact all regions on the region server.
`CompletableFuture<Void>`	`mergeRegions(byte[] nameOfRegionA, byte[] nameOfRegionB, boolean forcible)` Merge two regions.
`CompletableFuture<Void>`	`modifyColumnFamily(TableName tableName, ColumnFamilyDescriptor columnFamily)` Modify an existing column family on a table.
`CompletableFuture<Void>`	`modifyNamespace(NamespaceDescriptor descriptor)` Modify an existing namespace.
`CompletableFuture<Void>`	`move(byte[] regionName, Optional<ServerName> destServerName)` Move the region `r` to `dest`.
`CompletableFuture<Boolean>`	`normalize()` Invoke region normalizer.
`CompletableFuture<Void>`	`offline(byte[] regionName)` Offline specified region from master's in-memory state.
`CompletableFuture<Void>`	`removeDrainFromRegionServers(List<ServerName> servers)` Remove drain from a region server to allow additional regions assignments.
`CompletableFuture<Void>`	`removeReplicationPeer(String peerId)` Remove a peer and stop the replication
`CompletableFuture<Void>`	`removeReplicationPeerTableCFs(String peerId, Map<TableName,? extends Collection<String>> tableCfs)` Remove some table-cfs from config of the specified peer
`CompletableFuture<Void>`	`restoreSnapshot(String snapshotName)` Restore the specified snapshot on the original table.
`CompletableFuture<Void>`	`restoreSnapshot(String snapshotName, boolean takeFailSafeSnapshot)` Restore the specified snapshot on the original table.
`CompletableFuture<Void>`	`rollWALWriter(ServerName serverName)` Roll the log writer.
`CompletableFuture<Integer>`	`runCatalogJanitor()` Ask for a scan of the catalog table.
`CompletableFuture<Boolean>`	`runCleanerChore()` Ask for cleaner chore to run.
`CompletableFuture<Boolean>`	`setBalancerOn(boolean on)` Turn the load balancer on or off.
`CompletableFuture<Boolean>`	`setCatalogJanitorOn(boolean on)` Turn the catalog janitor on/off.
`CompletableFuture<Boolean>`	`setCleanerChoreOn(boolean on)` Turn the cleaner chore on/off.
`CompletableFuture<Boolean>`	`setMergeOn(boolean on)` Turn the Merge switch on or off.
`CompletableFuture<Boolean>`	`setNormalizerOn(boolean on)` Set region normalizer on/off.
`CompletableFuture<Void>`	`setQuota(QuotaSettings quota)` Apply the new quota settings.
`CompletableFuture<Boolean>`	`setSplitOn(boolean on)` Turn the Split switch on or off.
`CompletableFuture<Void>`	`shutdown()` Shuts down the HBase cluster.
`CompletableFuture<Void>`	`snapshot(SnapshotDescription snapshot)` Take a snapshot and wait for the server to complete that snapshot asynchronously.
`default CompletableFuture<Void>`	`snapshot(String snapshotName, TableName tableName)` Take a snapshot for the given table.
`default CompletableFuture<Void>`	`snapshot(String snapshotName, TableName tableName, SnapshotType type)` Create typed snapshot of the table.
`CompletableFuture<Void>`	`split(TableName tableName)` Split a table.
`CompletableFuture<Void>`	`split(TableName tableName, byte[] splitPoint)` Split a table.
`default CompletableFuture<Void>`	`splitRegion(byte[] regionName)` Split an individual region.
`CompletableFuture<Void>`	`splitRegion(byte[] regionName, Optional<byte[]> splitPoint)` Split an individual region.
`CompletableFuture<Void>`	`stopMaster()` Shuts down the current HBase master only.
`CompletableFuture<Void>`	`stopRegionServer(ServerName serverName)` Stop the designated regionserver.
`CompletableFuture<Boolean>`	`tableExists(TableName tableName)`
`CompletableFuture<Void>`	`truncateTable(TableName tableName, boolean preserveSplits)` Truncate a table.
`CompletableFuture<Void>`	`unassign(byte[] regionName, boolean forcible)` Unassign a region from current hosting regionserver.
`CompletableFuture<Void>`	`updateConfiguration()` Update the configuration and trigger an online config change on all the masters and regionservers.
`CompletableFuture<Void>`	`updateConfiguration(ServerName serverName)` Update the configuration and trigger an online config change on the regionserver.
`CompletableFuture<Void>`	`updateReplicationPeerConfig(String peerId, ReplicationPeerConfig peerConfig)` Update the peerConfig for the specified peer

- Method Detail
  - tableExists
```
CompletableFuture<Boolean> tableExists(TableName tableName)
```
    Parameters:
    
    tableName - Table to check.
    
    Returns:
    
    True if table exists already. The return value will be wrapped by a CompletableFuture.
  - listTables
```
default CompletableFuture<List<TableDescriptor>> listTables()
```
    List all the userspace tables.
    
    Returns:
    
    - returns a list of TableDescriptors wrapped by a CompletableFuture.
    
    See Also:
    
    listTables(Optional, boolean)
  - listTables
```
CompletableFuture<List<TableDescriptor>> listTables(Optional<Pattern> pattern,
                                                    boolean includeSysTables)
```
    List all the tables matching the given pattern.
    
    Parameters:
    
    pattern - The compiled regular expression to match against
    
    includeSysTables - False to match only against userspace tables
    
    Returns:
    
    - returns a list of TableDescriptors wrapped by a CompletableFuture.
  - listTableNames
```
default CompletableFuture<List<TableName>> listTableNames()
```
    List all of the names of userspace tables.
    
    Returns:
    
    a list of table names wrapped by a CompletableFuture.
    
    See Also:
    
    listTableNames(Optional, boolean)
  - listTableNames
```
CompletableFuture<List<TableName>> listTableNames(Optional<Pattern> pattern,
                                                  boolean includeSysTables)
```
    List all of the names of userspace tables.
    
    Parameters:
    
    pattern - The regular expression to match against
    
    includeSysTables - False to match only against userspace tables
    
    Returns:
    
    a list of table names wrapped by a CompletableFuture.
  - getTableDescriptor
```
CompletableFuture<TableDescriptor> getTableDescriptor(TableName tableName)
```
    Method for getting the tableDescriptor
    
    Parameters:
    
    tableName - as a TableName
    
    Returns:
    
    the read-only tableDescriptor wrapped by a CompletableFuture.
  - createTable
```
default CompletableFuture<Void> createTable(TableDescriptor desc)
```
    Creates a new table.
    
    Parameters:
    
    desc - table descriptor for table
  - createTable
```
CompletableFuture<Void> createTable(TableDescriptor desc,
                                    byte[] startKey,
                                    byte[] endKey,
                                    int numRegions)
```
    Creates a new table with the specified number of regions. The start key specified will become the end key of the first region of the table, and the end key specified will become the start key of the last region of the table (the first region has a null start key and the last region has a null end key). BigInteger math will be used to divide the key range specified into enough segments to make the required number of total regions.
    
    Parameters:
    
    desc - table descriptor for table
    
    startKey - beginning of key range
    
    endKey - end of key range
    
    numRegions - the total number of regions to create
  - createTable
```
CompletableFuture<Void> createTable(TableDescriptor desc,
                                    Optional<byte[][]> splitKeys)
```
    Creates a new table with an initial set of empty regions defined by the specified split keys. The total number of regions created will be the number of split keys plus one. Note : Avoid passing empty split key.
    
    Parameters:
    
    desc - table descriptor for table
    
    splitKeys - array of split keys for the initial regions of the table
  - deleteTable
```
CompletableFuture<Void> deleteTable(TableName tableName)
```
    Deletes a table.
    
    Parameters:
    
    tableName - name of table to delete
  - deleteTables
```
CompletableFuture<List<TableDescriptor>> deleteTables(Pattern pattern)
```
    Delete tables matching the passed in pattern and wait on completion. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTableNames(Optional, boolean) and deleteTable(org.apache.hadoop.hbase.TableName)
    
    Parameters:
    
    pattern - The pattern to match table names against
    
    Returns:
    
    Table descriptors for tables that couldn't be deleted. The return value will be wrapped by a CompletableFuture. The return HTDs are read-only.
  - truncateTable
```
CompletableFuture<Void> truncateTable(TableName tableName,
                                      boolean preserveSplits)
```
    Truncate a table.
    
    Parameters:
    
    tableName - name of table to truncate
    
    preserveSplits - True if the splits should be preserved
  - enableTable
```
CompletableFuture<Void> enableTable(TableName tableName)
```
    Enable a table. The table has to be in disabled state for it to be enabled.
    
    Parameters:
    
    tableName - name of the table
  - enableTables
```
CompletableFuture<List<TableDescriptor>> enableTables(Pattern pattern)
```
    Enable tables matching the passed in pattern. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(Optional, boolean) and enableTable(TableName)
    
    Parameters:
    
    pattern - The pattern to match table names against
    
    Returns:
    
    Table descriptors for tables that couldn't be enabled. The return value will be wrapped by a CompletableFuture. The return HTDs are read-only.
  - disableTable
```
CompletableFuture<Void> disableTable(TableName tableName)
```
    Disable a table. The table has to be in enabled state for it to be disabled.
    
    Parameters:
    
    tableName -
  - disableTables
```
CompletableFuture<List<TableDescriptor>> disableTables(Pattern pattern)
```
    Disable tables matching the passed in pattern. Warning: Use this method carefully, there is no prompting and the effect is immediate. Consider using listTables(Optional, boolean) and disableTable(TableName)
    
    Parameters:
    
    pattern - The pattern to match table names against
    
    Returns:
    
    Table descriptors for tables that couldn't be disabled. The return value will be wrapped by a CompletableFuture. The return HTDs are read-only.
  - isTableEnabled
```
CompletableFuture<Boolean> isTableEnabled(TableName tableName)
```
    Parameters:
    
    tableName - name of table to check
    
    Returns:
    
    true if table is on-line. The return value will be wrapped by a CompletableFuture.
  - isTableDisabled
```
CompletableFuture<Boolean> isTableDisabled(TableName tableName)
```
    Parameters:
    
    tableName - name of table to check
    
    Returns:
    
    true if table is off-line. The return value will be wrapped by a CompletableFuture.
  - isTableAvailable
```
default CompletableFuture<Boolean> isTableAvailable(TableName tableName)
```
    Parameters:
    
    tableName - name of table to check
    
    Returns:
    
    true if all regions of the table are available. The return value will be wrapped by a CompletableFuture.
  - isTableAvailable
```
CompletableFuture<Boolean> isTableAvailable(TableName tableName,
                                            byte[][] splitKeys)
```
    Use this api to check if the table has been created with the specified number of splitkeys which was used while creating the given table. Note : If this api is used after a table's region gets splitted, the api may return false. The return value will be wrapped by a CompletableFuture.
    
    Parameters:
    
    tableName - name of table to check
    
    splitKeys - keys to check if the table has been created with all split keys
  - getAlterStatus
```
CompletableFuture<Pair<Integer,Integer>> getAlterStatus(TableName tableName)
```
    Get the status of alter command - indicates how many regions have received the updated schema Asynchronous operation.
    
    Parameters:
    
    tableName - TableName instance
    
    Returns:
    
    Pair indicating the number of regions updated Pair.getFirst() is the regions that are yet to be updated Pair.getSecond() is the total number of regions of the table. The return value will be wrapped by a CompletableFuture.
  - addColumnFamily
```
CompletableFuture<Void> addColumnFamily(TableName tableName,
                                        ColumnFamilyDescriptor columnFamily)
```
    Add a column family to an existing table.
    
    Parameters:
    
    tableName - name of the table to add column family to
    
    columnFamily - column family descriptor of column family to be added
  - deleteColumnFamily
```
CompletableFuture<Void> deleteColumnFamily(TableName tableName,
                                           byte[] columnFamily)
```
    Delete a column family from a table.
    
    Parameters:
    
    tableName - name of table
    
    columnFamily - name of column family to be deleted
  - modifyColumnFamily
```
CompletableFuture<Void> modifyColumnFamily(TableName tableName,
                                           ColumnFamilyDescriptor columnFamily)
```
    Modify an existing column family on a table.
    
    Parameters:
    
    tableName - name of table
    
    columnFamily - new column family descriptor to use
  - createNamespace
```
CompletableFuture<Void> createNamespace(NamespaceDescriptor descriptor)
```
    Create a new namespace.
    
    Parameters:
    
    descriptor - descriptor which describes the new namespace
  - modifyNamespace
```
CompletableFuture<Void> modifyNamespace(NamespaceDescriptor descriptor)
```
    Modify an existing namespace.
    
    Parameters:
    
    descriptor - descriptor which describes the new namespace
  - deleteNamespace
```
CompletableFuture<Void> deleteNamespace(String name)
```
    Delete an existing namespace. Only empty namespaces (no tables) can be removed.
    
    Parameters:
    
    name - namespace name
  - getNamespaceDescriptor
```
CompletableFuture<NamespaceDescriptor> getNamespaceDescriptor(String name)
```
    Get a namespace descriptor by name
    
    Parameters:
    
    name - name of namespace descriptor
    
    Returns:
    
    A descriptor wrapped by a CompletableFuture.
  - listNamespaceDescriptors
```
CompletableFuture<List<NamespaceDescriptor>> listNamespaceDescriptors()
```
    List available namespace descriptors
    
    Returns:
    
    List of descriptors wrapped by a CompletableFuture.
  - closeRegion
```
@Deprecated
CompletableFuture<Boolean> closeRegion(byte[] regionName,
                                                   Optional<ServerName> serverName)
```
    Deprecated. As of release 2.0.0, this will be removed in HBase 3.0.0 (HBASE-18231). Use unassign(byte[], boolean).
    
    Close a region. For expert-admins Runs close on the regionserver. The master will not be informed of the close.
    
    Parameters:
    
    regionName - region name to close
    
    serverName - Deprecated. Not used anymore after deprecation.
    
    Returns:
    
    Deprecated. Always returns true now.
  - getOnlineRegions
```
CompletableFuture<List<HRegionInfo>> getOnlineRegions(ServerName serverName)
```
    Get all the online regions on a region server.
  - getTableRegions
```
CompletableFuture<List<HRegionInfo>> getTableRegions(TableName tableName)
```
    Get the regions of a given table.
  - flush
```
CompletableFuture<Void> flush(TableName tableName)
```
    Flush a table.
    
    Parameters:
    
    tableName - table to flush
  - flushRegion
```
CompletableFuture<Void> flushRegion(byte[] regionName)
```
    Flush an individual region.
    
    Parameters:
    
    regionName - region to flush
  - compact
```
default CompletableFuture<Void> compact(TableName tableName)
```
    Compact a table. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    tableName - table to compact
  - compact
```
CompletableFuture<Void> compact(TableName tableName,
                                Optional<byte[]> columnFamily)
```
    Compact a column family within a table. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    tableName - table to compact
    
    columnFamily - column family within a table. If not present, compact the table's all column families.
  - compactRegion
```
default CompletableFuture<Void> compactRegion(byte[] regionName)
```
    Compact an individual region. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    regionName - region to compact
  - compactRegion
```
CompletableFuture<Void> compactRegion(byte[] regionName,
                                      Optional<byte[]> columnFamily)
```
    Compact a column family within a region. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    regionName - region to compact
    
    columnFamily - column family within a region. If not present, compact the region's all column families.
  - majorCompact
```
default CompletableFuture<Void> majorCompact(TableName tableName)
```
    Major compact a table. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    tableName - table to major compact
  - majorCompact
```
CompletableFuture<Void> majorCompact(TableName tableName,
                                     Optional<byte[]> columnFamily)
```
    Major compact a column family within a table. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    tableName - table to major compact
    
    columnFamily - column family within a table. If not present, major compact the table's all column families.
  - majorCompactRegion
```
default CompletableFuture<Void> majorCompactRegion(byte[] regionName)
```
    Major compact a region. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    regionName - region to major compact
  - majorCompactRegion
```
CompletableFuture<Void> majorCompactRegion(byte[] regionName,
                                           Optional<byte[]> columnFamily)
```
    Major compact a column family within region. When the returned CompletableFuture is done, it only means the compact request was sent to HBase and may need some time to finish the compact operation.
    
    Parameters:
    
    regionName - region to major compact
    
    columnFamily - column family within a region. If not present, major compact the region's all column families.
  - compactRegionServer
```
CompletableFuture<Void> compactRegionServer(ServerName serverName)
```
    Compact all regions on the region server.
    
    Parameters:
    
    serverName - the region server name
  - majorCompactRegionServer
```
CompletableFuture<Void> majorCompactRegionServer(ServerName serverName)
```
    Compact all regions on the region server.
    
    Parameters:
    
    serverName - the region server name
  - setMergeOn
```
CompletableFuture<Boolean> setMergeOn(boolean on)
```
    Turn the Merge switch on or off.
    
    Parameters:
    
    on -
    
    Returns:
    
    Previous switch value wrapped by a CompletableFuture
  - isMergeOn
```
CompletableFuture<Boolean> isMergeOn()
```
    Query the current state of the Merge switch.
    
    Returns:
    
    true if the switch is on, false otherwise. The return value will be wrapped by a CompletableFuture
  - setSplitOn
```
CompletableFuture<Boolean> setSplitOn(boolean on)
```
    Turn the Split switch on or off.
    
    Parameters:
    
    on -
    
    Returns:
    
    Previous switch value wrapped by a CompletableFuture
  - isSplitOn
```
CompletableFuture<Boolean> isSplitOn()
```
    Query the current state of the Split switch.
    
    Returns:
    
    true if the switch is on, false otherwise. The return value will be wrapped by a CompletableFuture
  - mergeRegions
```
CompletableFuture<Void> mergeRegions(byte[] nameOfRegionA,
                                     byte[] nameOfRegionB,
                                     boolean forcible)
```
    Merge two regions.
    
    Parameters:
    
    nameOfRegionA - encoded or full name of region a
    
    nameOfRegionB - encoded or full name of region b
    
    forcible - true if do a compulsory merge, otherwise we will only merge two adjacent regions
  - split
```
CompletableFuture<Void> split(TableName tableName)
```
    Split a table. The method will execute split action for each region in table.
    
    Parameters:
    
    tableName - table to split
  - splitRegion
```
default CompletableFuture<Void> splitRegion(byte[] regionName)
```
    Split an individual region.
    
    Parameters:
    
    regionName - region to split
  - split
```
CompletableFuture<Void> split(TableName tableName,
                              byte[] splitPoint)
```
    Split a table.
    
    Parameters:
    
    tableName - table to split
    
    splitPoint - the explicit position to split on
  - splitRegion
```
CompletableFuture<Void> splitRegion(byte[] regionName,
                                    Optional<byte[]> splitPoint)
```
    Split an individual region.
    
    Parameters:
    
    regionName - region to split
    
    splitPoint - the explicit position to split on. If not present, it will decide by region server.
  - assign
```
CompletableFuture<Void> assign(byte[] regionName)
```
    Parameters:
    
    regionName - Encoded or full name of region to assign.
  - unassign
```
CompletableFuture<Void> unassign(byte[] regionName,
                                 boolean forcible)
```
    Unassign a region from current hosting regionserver. Region will then be assigned to a regionserver chosen at random. Region could be reassigned back to the same server. Use move(byte[], Optional) if you want to control the region movement.
    
    Parameters:
    
    regionName - Encoded or full name of region to unassign. Will clear any existing RegionPlan if one found.
    
    forcible - If true, force unassign (Will remove region from regions-in-transition too if present. If results in double assignment use hbck -fix to resolve. To be used by experts).
  - offline
```
CompletableFuture<Void> offline(byte[] regionName)
```
    Offline specified region from master's in-memory state. It will not attempt to reassign the region as in unassign. This API can be used when a region not served by any region server and still online as per Master's in memory state. If this API is incorrectly used on active region then master will loose track of that region. This is a special method that should be used by experts or hbck.
    
    Parameters:
    
    regionName - Encoded or full name of region to offline
  - move
```
CompletableFuture<Void> move(byte[] regionName,
                             Optional<ServerName> destServerName)
```
    Move the region r to dest.
    
    Parameters:
    
    regionName - Encoded or full name of region to move.
    
    destServerName - The servername of the destination regionserver. If not present, we'll assign to a random server. A server name is made of host, port and startcode. Here is an example: host187.example.com,60020,1289493121758
  - setQuota
```
CompletableFuture<Void> setQuota(QuotaSettings quota)
```
    Apply the new quota settings.
    
    Parameters:
    
    quota - the quota settings
  - getQuota
```
CompletableFuture<List<QuotaSettings>> getQuota(QuotaFilter filter)
```
    List the quotas based on the filter.
    
    Parameters:
    
    filter - the quota settings filter
    
    Returns:
    
    the QuotaSetting list, which wrapped by a CompletableFuture.
  - addReplicationPeer
```
CompletableFuture<Void> addReplicationPeer(String peerId,
                                           ReplicationPeerConfig peerConfig)
```
    Add a new replication peer for replicating data to slave cluster
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    peerConfig - configuration for the replication slave cluster
  - removeReplicationPeer
```
CompletableFuture<Void> removeReplicationPeer(String peerId)
```
    Remove a peer and stop the replication
    
    Parameters:
    
    peerId - a short name that identifies the peer
  - enableReplicationPeer
```
CompletableFuture<Void> enableReplicationPeer(String peerId)
```
    Restart the replication stream to the specified peer
    
    Parameters:
    
    peerId - a short name that identifies the peer
  - disableReplicationPeer
```
CompletableFuture<Void> disableReplicationPeer(String peerId)
```
    Stop the replication stream to the specified peer
    
    Parameters:
    
    peerId - a short name that identifies the peer
  - getReplicationPeerConfig
```
CompletableFuture<ReplicationPeerConfig> getReplicationPeerConfig(String peerId)
```
    Returns the configured ReplicationPeerConfig for the specified peer
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    Returns:
    
    ReplicationPeerConfig for the peer wrapped by a CompletableFuture.
  - updateReplicationPeerConfig
```
CompletableFuture<Void> updateReplicationPeerConfig(String peerId,
                                                    ReplicationPeerConfig peerConfig)
```
    Update the peerConfig for the specified peer
    
    Parameters:
    
    peerId - a short name that identifies the peer
    
    peerConfig - new config for the peer
  - appendReplicationPeerTableCFs
```
CompletableFuture<Void> appendReplicationPeerTableCFs(String peerId,
                                                      Map<TableName,? extends Collection<String>> tableCfs)
```
    Append the replicable table-cf config of the specified peer
    
    Parameters:
    
    peerId - a short that identifies the cluster
    
    tableCfs - A map from tableName to column family names
  - removeReplicationPeerTableCFs
```
CompletableFuture<Void> removeReplicationPeerTableCFs(String peerId,
                                                      Map<TableName,? extends Collection<String>> tableCfs)
```
    Remove some table-cfs from config of the specified peer
    
    Parameters:
    
    peerId - a short name that identifies the cluster
    
    tableCfs - A map from tableName to column family names
  - listReplicationPeers
```
default CompletableFuture<List<ReplicationPeerDescription>> listReplicationPeers()
```
    Return a list of replication peers.
    
    Returns:
    
    a list of replication peers description. The return value will be wrapped by a CompletableFuture.
  - listReplicationPeers
```
CompletableFuture<List<ReplicationPeerDescription>> listReplicationPeers(Optional<Pattern> pattern)
```
    Return a list of replication peers.
    
    Parameters:
    
    pattern - The compiled regular expression to match peer id
    
    Returns:
    
    a list of replication peers description. The return value will be wrapped by a CompletableFuture.
  - listReplicatedTableCFs
```
CompletableFuture<List<TableCFs>> listReplicatedTableCFs()
```
    Find all table and column families that are replicated from this cluster
    
    Returns:
    
    the replicated table-cfs list of this cluster. The return value will be wrapped by a CompletableFuture.
  - snapshot
```
default CompletableFuture<Void> snapshot(String snapshotName,
                                         TableName tableName)
```
    Take a snapshot for the given table. If the table is enabled, a FLUSH-type snapshot will be taken. If the table is disabled, an offline snapshot is taken. Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming. Snapshot names follow the same naming constraints as tables in HBase. See TableName.isLegalFullyQualifiedTableName(byte[]).
    
    Parameters:
    
    snapshotName - name of the snapshot to be created
    
    tableName - name of the table for which snapshot is created
  - snapshot
```
default CompletableFuture<Void> snapshot(String snapshotName,
                                         TableName tableName,
                                         SnapshotType type)
```
    Create typed snapshot of the table. Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming. Snapshot names follow the same naming constraints as tables in HBase. See TableName.isLegalFullyQualifiedTableName(byte[]).
    
    Parameters:
    
    snapshotName - name to give the snapshot on the filesystem. Must be unique from all other snapshots stored on the cluster
    
    tableName - name of the table to snapshot
    
    type - type of snapshot to take
  - snapshot
```
CompletableFuture<Void> snapshot(SnapshotDescription snapshot)
```
    Take a snapshot and wait for the server to complete that snapshot asynchronously. Only a single snapshot should be taken at a time for an instance of HBase, or results may be undefined (you can tell multiple HBase clusters to snapshot at the same time, but only one at a time for a single cluster). Snapshots are considered unique based on the name of the snapshot. Attempts to take a snapshot with the same name (even a different type or with different parameters) will fail with a SnapshotCreationException indicating the duplicate naming. Snapshot names follow the same naming constraints as tables in HBase. See TableName.isLegalFullyQualifiedTableName(byte[]). You should probably use snapshot(String, org.apache.hadoop.hbase.TableName) unless you are sure about the type of snapshot that you want to take.
    
    Parameters:
    
    snapshot - snapshot to take
  - isSnapshotFinished
```
CompletableFuture<Boolean> isSnapshotFinished(SnapshotDescription snapshot)
```
    Check the current state of the passed snapshot. There are three possible states:
    1. running - returns false
    2. finished - returns true
    3. finished with error - throws the exception that caused the snapshot to fail
    The cluster only knows about the most recent snapshot. Therefore, if another snapshot has been run/started since the snapshot you are checking, you will receive an UnknownSnapshotException.
    Parameters:
    
    snapshot - description of the snapshot to check
    
    Returns:
    
    true if the snapshot is completed, false if the snapshot is still running
  - restoreSnapshot
```
CompletableFuture<Void> restoreSnapshot(String snapshotName)
```
    Restore the specified snapshot on the original table. (The table must be disabled) If the "hbase.snapshot.restore.take.failsafe.snapshot" configuration property is set to true, a snapshot of the current table is taken before executing the restore operation. In case of restore failure, the failsafe snapshot will be restored. If the restore completes without problem the failsafe snapshot is deleted.
    
    Parameters:
    
    snapshotName - name of the snapshot to restore
  - restoreSnapshot
```
CompletableFuture<Void> restoreSnapshot(String snapshotName,
                                        boolean takeFailSafeSnapshot)
```
    Restore the specified snapshot on the original table. (The table must be disabled) If 'takeFailSafeSnapshot' is set to true, a snapshot of the current table is taken before executing the restore operation. In case of restore failure, the failsafe snapshot will be restored. If the restore completes without problem the failsafe snapshot is deleted. The failsafe snapshot name is configurable by using the property "hbase.snapshot.restore.failsafe.name".
    
    Parameters:
    
    snapshotName - name of the snapshot to restore
    
    takeFailSafeSnapshot - true if the failsafe snapshot should be taken
  - cloneSnapshot
```
CompletableFuture<Void> cloneSnapshot(String snapshotName,
                                      TableName tableName)
```
    Create a new table by cloning the snapshot content.
    
    Parameters:
    
    snapshotName - name of the snapshot to be cloned
    
    tableName - name of the table where the snapshot will be restored
  - listSnapshots
```
default CompletableFuture<List<SnapshotDescription>> listSnapshots()
```
    List completed snapshots.
    
    Returns:
    
    a list of snapshot descriptors for completed snapshots wrapped by a CompletableFuture
  - listSnapshots
```
CompletableFuture<List<SnapshotDescription>> listSnapshots(Optional<Pattern> pattern)
```
    List all the completed snapshots matching the given pattern.
    
    Parameters:
    
    pattern - The compiled regular expression to match against
    
    Returns:
    
    - returns a List of SnapshotDescription wrapped by a CompletableFuture
  - listTableSnapshots
```
CompletableFuture<List<SnapshotDescription>> listTableSnapshots(Pattern tableNamePattern,
                                                                Pattern snapshotNamePattern)
```
    List all the completed snapshots matching the given table name regular expression and snapshot name regular expression.
    
    Parameters:
    
    tableNamePattern - The compiled table name regular expression to match against
    
    snapshotNamePattern - The compiled snapshot name regular expression to match against
    
    Returns:
    
    - returns a List of completed SnapshotDescription wrapped by a CompletableFuture
  - deleteSnapshot
```
CompletableFuture<Void> deleteSnapshot(String snapshotName)
```
    Delete an existing snapshot.
    
    Parameters:
    
    snapshotName - name of the snapshot
  - deleteSnapshots
```
default CompletableFuture<Void> deleteSnapshots(Pattern pattern)
```
    Delete existing snapshots whose names match the pattern passed.
    
    Parameters:
    
    pattern - pattern for names of the snapshot to match
  - deleteTableSnapshots
```
CompletableFuture<Void> deleteTableSnapshots(Pattern tableNamePattern,
                                             Pattern snapshotNamePattern)
```
    Delete all existing snapshots matching the given table name regular expression and snapshot name regular expression.
    
    Parameters:
    
    tableNamePattern - The compiled table name regular expression to match against
    
    snapshotNamePattern - The compiled snapshot name regular expression to match against
  - execProcedure
```
CompletableFuture<Void> execProcedure(String signature,
                                      String instance,
                                      Map<String,String> props)
```
    Execute a distributed procedure on a cluster.
    
    Parameters:
    
    signature - A distributed procedure is uniquely identified by its signature (default the root ZK node name of the procedure).
    
    instance - The instance name of the procedure. For some procedures, this parameter is optional.
    
    props - Property/Value pairs of properties passing to the procedure
  - execProcedureWithRet
```
CompletableFuture<byte[]> execProcedureWithRet(String signature,
                                               String instance,
                                               Map<String,String> props)
```
    Execute a distributed procedure on a cluster.
    
    Parameters:
    
    signature - A distributed procedure is uniquely identified by its signature (default the root ZK node name of the procedure).
    
    instance - The instance name of the procedure. For some procedures, this parameter is optional.
    
    props - Property/Value pairs of properties passing to the procedure
    
    Returns:
    
    data returned after procedure execution. null if no return data.
  - isProcedureFinished
```
CompletableFuture<Boolean> isProcedureFinished(String signature,
                                               String instance,
                                               Map<String,String> props)
```
    Check the current state of the specified procedure. There are three possible states:
    1. running - returns false
    2. finished - returns true
    3. finished with error - throws the exception that caused the procedure to fail
    Parameters:
    
    signature - The signature that uniquely identifies a procedure
    
    instance - The instance name of the procedure
    
    props - Property/Value pairs of properties passing to the procedure
    
    Returns:
    
    true if the specified procedure is finished successfully, false if it is still running. The value is wrapped by CompletableFuture
  - abortProcedure
```
CompletableFuture<Boolean> abortProcedure(long procId,
                                          boolean mayInterruptIfRunning)
```
    abort a procedure
    
    Parameters:
    
    procId - ID of the procedure to abort
    
    mayInterruptIfRunning - if the proc completed at least one step, should it be aborted?
    
    Returns:
    
    true if aborted, false if procedure already completed or does not exist. the value is wrapped by CompletableFuture
  - listProcedures
```
CompletableFuture<List<ProcedureInfo>> listProcedures()
```
    List procedures
    
    Returns:
    
    procedure list wrapped by CompletableFuture
  - listProcedureLocks
```
CompletableFuture<List<LockInfo>> listProcedureLocks()
```
    List procedure locks.
    
    Returns:
    
    lock list wrapped by CompletableFuture
  - drainRegionServers
```
CompletableFuture<Void> drainRegionServers(List<ServerName> servers)
```
    Mark a region server as draining to prevent additional regions from getting assigned to it.
    
    Parameters:
    
    servers -
  - listDrainingRegionServers
```
CompletableFuture<List<ServerName>> listDrainingRegionServers()
```
    List region servers marked as draining to not get additional regions assigned to them.
    
    Returns:
    
    List of draining region servers wrapped by CompletableFuture
  - removeDrainFromRegionServers
```
CompletableFuture<Void> removeDrainFromRegionServers(List<ServerName> servers)
```
    Remove drain from a region server to allow additional regions assignments.
    
    Parameters:
    
    servers - List of region servers to remove drain from.
  - getClusterStatus
```
CompletableFuture<ClusterStatus> getClusterStatus()
```
    Returns:
    
    cluster status wrapped by CompletableFuture
  - getClusterStatus
```
CompletableFuture<ClusterStatus> getClusterStatus(ClusterStatus.Options options)
```
    Returns:
    
    cluster status wrapped by CompletableFuture
  - getMaster
```
default CompletableFuture<ServerName> getMaster()
```
    Returns:
    
    current master server name wrapped by CompletableFuture
  - getBackupMasters
```
default CompletableFuture<Collection<ServerName>> getBackupMasters()
```
    Returns:
    
    current backup master list wrapped by CompletableFuture
  - getRegionServers
```
default CompletableFuture<Collection<ServerName>> getRegionServers()
```
    Returns:
    
    current live region servers list wrapped by CompletableFuture
  - getRegionLoads
```
default CompletableFuture<List<RegionLoad>> getRegionLoads(ServerName serverName)
```
    Get a list of RegionLoad of all regions hosted on a region seerver.
    
    Parameters:
    
    serverName -
    
    Returns:
    
    a list of RegionLoad wrapped by CompletableFuture
  - shutdown
```
CompletableFuture<Void> shutdown()
```
    Shuts down the HBase cluster.
  - stopMaster
```
CompletableFuture<Void> stopMaster()
```
    Shuts down the current HBase master only.
  - stopRegionServer
```
CompletableFuture<Void> stopRegionServer(ServerName serverName)
```
    Stop the designated regionserver.
    
    Parameters:
    
    serverName -
  - updateConfiguration
```
CompletableFuture<Void> updateConfiguration(ServerName serverName)
```
    Update the configuration and trigger an online config change on the regionserver.
    
    Parameters:
    
    serverName - : The server whose config needs to be updated.
  - updateConfiguration
```
CompletableFuture<Void> updateConfiguration()
```
    Update the configuration and trigger an online config change on all the masters and regionservers.
  - rollWALWriter
```
CompletableFuture<Void> rollWALWriter(ServerName serverName)
```
    Roll the log writer. I.e. for filesystem based write ahead logs, start writing to a new file.
    When the returned CompletableFuture is done, it only means the rollWALWriter request was sent to the region server and may need some time to finish the rollWALWriter operation. As a side effect of this call, the named region server may schedule store flushes at the request of the wal.
    
    Parameters:
    
    serverName - The servername of the region server.
  - clearCompactionQueues
```
CompletableFuture<Void> clearCompactionQueues(ServerName serverName,
                                              Set<String> queues)
```
    Clear compacting queues on a region server.
    
    Parameters:
    
    serverName -
    
    queues - the set of queue name
  - getRegionLoads
```
CompletableFuture<List<RegionLoad>> getRegionLoads(ServerName serverName,
                                                   Optional<TableName> tableName)
```
    Get a list of RegionLoad of all regions hosted on a region seerver for a table.
    
    Parameters:
    
    serverName -
    
    tableName -
    
    Returns:
    
    a list of RegionLoad wrapped by CompletableFuture
  - isMasterInMaintenanceMode
```
CompletableFuture<Boolean> isMasterInMaintenanceMode()
```
    Check whether master is in maintenance mode
    
    Returns:
    
    true if master is in maintenance mode, false otherwise. The return value will be wrapped by a CompletableFuture
  - getCompactionState
```
CompletableFuture<CompactionState> getCompactionState(TableName tableName)
```
    Get the current compaction state of a table. It could be in a major compaction, a minor compaction, both, or none.
    
    Parameters:
    
    tableName - table to examine
    
    Returns:
    
    the current compaction state wrapped by a CompletableFuture
  - getCompactionStateForRegion
```
CompletableFuture<CompactionState> getCompactionStateForRegion(byte[] regionName)
```
    Get the current compaction state of region. It could be in a major compaction, a minor compaction, both, or none.
    
    Parameters:
    
    regionName - region to examine
    
    Returns:
    
    the current compaction state wrapped by a CompletableFuture
  - getLastMajorCompactionTimestamp
```
CompletableFuture<Optional<Long>> getLastMajorCompactionTimestamp(TableName tableName)
```
    Get the timestamp of the last major compaction for the passed table.
    The timestamp of the oldest HFile resulting from a major compaction of that table, or not present if no such HFile could be found.
    
    Parameters:
    
    tableName - table to examine
    
    Returns:
    
    the last major compaction timestamp wrapped by a CompletableFuture
  - getLastMajorCompactionTimestampForRegion
```
CompletableFuture<Optional<Long>> getLastMajorCompactionTimestampForRegion(byte[] regionName)
```
    Get the timestamp of the last major compaction for the passed region.
    The timestamp of the oldest HFile resulting from a major compaction of that region, or not present if no such HFile could be found.
    
    Parameters:
    
    regionName - region to examine
    
    Returns:
    
    the last major compaction timestamp wrapped by a CompletableFuture
  - getSecurityCapabilities
```
CompletableFuture<List<SecurityCapability>> getSecurityCapabilities()
```
    Returns:
    
    the list of supported security capabilities. The return value will be wrapped by a CompletableFuture.
  - setBalancerOn
```
CompletableFuture<Boolean> setBalancerOn(boolean on)
```
    Turn the load balancer on or off.
    
    Parameters:
    
    on -
    
    Returns:
    
    Previous balancer value wrapped by a CompletableFuture.
  - balance
```
default CompletableFuture<Boolean> balance()
```
    Invoke the balancer. Will run the balancer and if regions to move, it will go ahead and do the reassignments. Can NOT run for various reasons. Check logs.
    
    Returns:
    
    True if balancer ran, false otherwise. The return value will be wrapped by a CompletableFuture.
  - balance
```
CompletableFuture<Boolean> balance(boolean forcible)
```
    Invoke the balancer. Will run the balancer and if regions to move, it will go ahead and do the reassignments. If there is region in transition, force parameter of true would still run balancer. Can *not* run for other reasons. Check logs.
    
    Parameters:
    
    forcible - whether we should force balance even if there is region in transition.
    
    Returns:
    
    True if balancer ran, false otherwise. The return value will be wrapped by a CompletableFuture.
  - isBalancerOn
```
CompletableFuture<Boolean> isBalancerOn()
```
    Query the current state of the balancer.
    
    Returns:
    
    true if the balance switch is on, false otherwise. The return value will be wrapped by a CompletableFuture.
  - setNormalizerOn
```
CompletableFuture<Boolean> setNormalizerOn(boolean on)
```
    Set region normalizer on/off.
    
    Parameters:
    
    on - whether normalizer should be on or off
    
    Returns:
    
    Previous normalizer value wrapped by a CompletableFuture
  - isNormalizerOn
```
CompletableFuture<Boolean> isNormalizerOn()
```
    Query the current state of the region normalizer
    
    Returns:
    
    true if region normalizer is on, false otherwise. The return value will be wrapped by a CompletableFuture
  - normalize
```
CompletableFuture<Boolean> normalize()
```
    Invoke region normalizer. Can NOT run for various reasons. Check logs.
    
    Returns:
    
    true if region normalizer ran, false otherwise. The return value will be wrapped by a CompletableFuture
  - setCleanerChoreOn
```
CompletableFuture<Boolean> setCleanerChoreOn(boolean on)
```
    Turn the cleaner chore on/off.
    
    Parameters:
    
    on -
    
    Returns:
    
    Previous cleaner state wrapped by a CompletableFuture
  - isCleanerChoreOn
```
CompletableFuture<Boolean> isCleanerChoreOn()
```
    Query the current state of the cleaner chore.
    
    Returns:
    
    true if cleaner chore is on, false otherwise. The return value will be wrapped by a CompletableFuture
  - runCleanerChore
```
CompletableFuture<Boolean> runCleanerChore()
```
    Ask for cleaner chore to run.
    
    Returns:
    
    true if cleaner chore ran, false otherwise. The return value will be wrapped by a CompletableFuture
  - setCatalogJanitorOn
```
CompletableFuture<Boolean> setCatalogJanitorOn(boolean on)
```
    Turn the catalog janitor on/off.
    
    Parameters:
    
    on -
    
    Returns:
    
    the previous state wrapped by a CompletableFuture
  - isCatalogJanitorOn
```
CompletableFuture<Boolean> isCatalogJanitorOn()
```
    Query on the catalog janitor state.
    
    Returns:
    
    true if the catalog janitor is on, false otherwise. The return value will be wrapped by a CompletableFuture
  - runCatalogJanitor
```
CompletableFuture<Integer> runCatalogJanitor()
```
    Ask for a scan of the catalog table.
    
    Returns:
    
    the number of entries cleaned. The return value will be wrapped by a CompletableFuture
  - coprocessorService
```
<S,R> CompletableFuture<R> coprocessorService(Function<com.google.protobuf.RpcChannel,S> stubMaker,
                                              RawAsyncTable.CoprocessorCallable<S,R> callable)
```
    Execute the given coprocessor call on the master.
    The stubMaker is just a delegation to the newStub call. Usually it is only a one line lambda expression, like:
```
 
 channel -> xxxService.newStub(channel)
 
 
```
    Type Parameters:
    
    S - the type of the asynchronous stub
    
    R - the type of the return value
    
    Parameters:
    
    stubMaker - a delegation to the actual newStub call.
    
    callable - a delegation to the actual protobuf rpc call. See the comment of RawAsyncTable.CoprocessorCallable for more details.
    
    Returns:
    
    the return value of the protobuf rpc call, wrapped by a CompletableFuture.
    
    See Also:
    
    RawAsyncTable.CoprocessorCallable
  - coprocessorService
```
<S,R> CompletableFuture<R> coprocessorService(Function<com.google.protobuf.RpcChannel,S> stubMaker,
                                              RawAsyncTable.CoprocessorCallable<S,R> callable,
                                              ServerName serverName)
```
    Execute the given coprocessor call on the given region server.
    The stubMaker is just a delegation to the newStub call. Usually it is only a one line lambda expression, like:
```
 
 channel -> xxxService.newStub(channel)
 
 
```
    Type Parameters:
    
    S - the type of the asynchronous stub
    
    R - the type of the return value
    
    Parameters:
    
    stubMaker - a delegation to the actual newStub call.
    
    callable - a delegation to the actual protobuf rpc call. See the comment of RawAsyncTable.CoprocessorCallable for more details.
    
    serverName - the given region server
    
    Returns:
    
    the return value of the protobuf rpc call, wrapped by a CompletableFuture.
    
    See Also:
    
    RawAsyncTable.CoprocessorCallable

Interface AsyncAdmin

Method Summary

Method Detail

tableExists

listTables

listTables

listTableNames

listTableNames

getTableDescriptor

createTable

createTable

createTable

deleteTable

deleteTables

truncateTable

enableTable

enableTables

disableTable

disableTables

isTableEnabled

isTableDisabled

isTableAvailable

isTableAvailable

getAlterStatus

addColumnFamily

deleteColumnFamily

modifyColumnFamily

createNamespace

modifyNamespace

deleteNamespace

getNamespaceDescriptor

listNamespaceDescriptors

closeRegion

getOnlineRegions

getTableRegions

flush

flushRegion

compact

compact

compactRegion

compactRegion

majorCompact

majorCompact

majorCompactRegion

majorCompactRegion

compactRegionServer

majorCompactRegionServer

setMergeOn

isMergeOn

setSplitOn

isSplitOn

mergeRegions

split

splitRegion

split

splitRegion

assign

unassign

offline

move

setQuota

getQuota

addReplicationPeer

removeReplicationPeer

enableReplicationPeer

disableReplicationPeer

getReplicationPeerConfig

updateReplicationPeerConfig

appendReplicationPeerTableCFs

removeReplicationPeerTableCFs

listReplicationPeers

listReplicationPeers

listReplicatedTableCFs

snapshot

snapshot

snapshot

isSnapshotFinished

restoreSnapshot

restoreSnapshot

cloneSnapshot