Package org.apache.hadoop.hbase

Interface Summary

Interface	Description
Cell	The unit of storage in HBase consisting of the following fields:
CellBuilder	Use CellBuilderFactory to get CellBuilder instance.
CellComparator	Comparator for comparing cells and has some specialized methods that allows comparing individual cell components like row, family, qualifier and timestamp
CellScannable	Implementer can return a CellScanner over its Cell content.
CellScanner	An interface for iterating through a sequence of cells.
ClusterMetrics	Metrics information on the HBase cluster.
RegionMetrics	Encapsulates per-region load metrics.
ServerMetrics	This class is used for exporting current state of load on a RegionServer.
Stoppable	Implementers are Stoppable.

Class Summary

Class	Description
AuthUtil	Utility methods for helping with security tasks.
CacheEvictionStats
CellBuilderFactory	Create a CellBuilder instance.
CellUtil	Utility methods helpful for slinging Cell instances.
ChoreService	ChoreService is a service that can be used to schedule instances of ScheduledChore to run periodically while sharing threads.
ClusterStatus	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use ClusterMetrics instead.
HBaseConfiguration	Adds HBase configuration files to a Configuration
HBaseInterfaceAudience	This class defines constants for different classes of hbase limited private apis
HColumnDescriptor	Deprecated
HConstants	HConstants holds a bunch of HBase-related constants
HRegionInfo	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0.
HRegionLocation	Data structure to hold RegionInfo and the address for the hosting HRegionServer.
HTableDescriptor	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0.
LocalHBaseCluster	This class creates a single process HBase cluster.
NamespaceDescriptor	Namespace POJO class.
NamespaceDescriptor.Builder
RegionLoad	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use RegionMetrics instead.
ScheduledChore	ScheduledChore is a task performed on a period in hbase.
ServerLoad	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use ServerMetrics instead.
ServerName	Name of a particular incarnation of an HBase Server.
Size	It is used to represent the size with different units.
TableName	Immutable POJO class for representing a table name.

Enum Summary

Enum	Description
CellBuilderType	Used by CellBuilderFactory and ExtendedCellBuilderFactory.
CompareOperator	Generic set of comparison operators.
KeepDeletedCells	Ways to keep cells marked for delete around.
MemoryCompactionPolicy	Enum describing all possible memory compaction policies

Exception Summary

Exception	Description
CallDroppedException	Returned to the clients when their request was discarded due to server being overloaded.
CallQueueTooBigException
ClockOutOfSyncException	This exception is thrown by the master when a region server clock skew is too high.
DoNotRetryIOException	Subclass if exception is not meant to be retried: e.g.
DroppedSnapshotException	Thrown during flush if the possibility snapshot content was not properly persisted into store files.
HBaseIOException	All hbase specific IOExceptions should be subclasses of HBaseIOException
InvalidFamilyOperationException	Thrown if a request is table schema modification is requested but made for an invalid family name.
MasterNotRunningException	Thrown if the master is not running
MultiActionResultTooLarge	Exception thrown when the result needs to be chunked on the server side.
NamespaceExistException	Thrown when a namespace exists but should not
NamespaceNotFoundException	Thrown when a namespace can not be located
NotAllMetaRegionsOnlineException	Thrown when an operation requires the root and all meta regions to be online
NotServingRegionException	Thrown by a region server if it is sent a request for a region it is not serving.
PleaseHoldException	This exception is thrown by the master when a region server was shut down and restarted so fast that the master still hasn't processed the server shutdown of the first instance, or when master is initializing and client call admin operations, or when an operation is performed on a region server that is still starting.
RegionException	Thrown when something happens related to region handling.
RegionTooBusyException	Thrown by a region server if it will block and wait to serve a request.
ReplicationPeerNotFoundException	Thrown when a replication peer can not be found
RetryImmediatelyException
TableExistsException	Thrown when a table exists but should not.
TableInfoMissingException	Failed to find .tableinfo file under the table directory.
TableNotDisabledException	Thrown if a table should be offline but is not.
TableNotEnabledException	Thrown if a table should be enabled but is not.
TableNotFoundException	Thrown when a table cannot be located.
UnknownRegionException	Thrown when we are asked to operate on a region we know nothing about.
UnknownScannerException	Thrown if a region server is passed an unknown scanner ID.
ZooKeeperConnectionException	Thrown if the client can't connect to ZooKeeper.