Package org.apache.hadoop.hbase.master

Interface Summary

Interface	Description
AssignmentListener	Get notification of assignment events.
ClusterStatusPublisher.Publisher
LoadBalancer	Makes decisions about the placement and movement of Regions across RegionServers.
MasterServices	Services Master supplies
MetricsAssignmentManagerSource
MetricsMasterFileSystemSource
MetricsMasterProcSource	Interface that classes that expose metrics about the master will implement.
MetricsMasterProcSourceFactory	Interface of a factory to create MetricsMasterSource when given a MetricsMasterWrapper
MetricsMasterSource	Interface that classes that expose metrics about the master will implement.
MetricsMasterSourceFactory	Interface of a factory to create MetricsMasterSource when given a MetricsMasterWrapper
MetricsMasterWrapper	This is the interface that will expose information to hadoop1/hadoop2 implementations of the MetricsMasterSource.
MetricsSnapshotSource
ServerListener	Get notification of server events.
SnapshotSentinel	Watch the current snapshot under process
TableLockManager.TableLock	A distributed lock for a table.

Class Summary

Class	Description
ActiveMasterManager	Handles everything on master-side related to master election.
AssignCallable	A callable object that invokes the corresponding action that needs to be taken for assignment of a region in transition.
AssignmentManager	Manages and performs region assignment.
AssignmentVerificationReport	Helper class that is used by RegionPlacementMaintainer to print information for favored nodes
BulkAssigner	Base class used bulk assigning and unassigning regions.
BulkReOpen	Performs bulk reopen of the list of regions provided to it.
CatalogJanitor	A janitor for the catalog tables.
ClusterStatusPublisher	Class to publish the cluster status to the client.
ClusterStatusPublisher.MulticastPublisher
DeadServer	Class to hold dead servers list and utility querying dead server list.
ExpiredMobFileCleanerChore	The Class ExpiredMobFileCleanerChore for running cleaner regularly to remove the expired mob files.
GeneralBulkAssigner	Run bulk assign.
HMaster	HMaster is the "master server" for HBase.
HMaster.RedirectServlet
HMasterCommandLine
HMasterCommandLine.LocalHMaster
MasterAnnotationReadingPriorityFunction	Priority function specifically for the master.
MasterCoprocessorHost	Provides the coprocessor framework and environment for master oriented operations.
MasterDumpServlet
MasterFileSystem	This class abstracts a bunch of operations the HMaster needs to interact with the underlying file system, including splitting log files, checking file system status, etc.
MasterMobFileCompactionThread	The mob file compaction thread used in MasterRpcServices
MasterRpcServices	Implements the master RPC services.
MasterStatusServlet	The servlet responsible for rendering the index page of the master.
MetricsAssignmentManager
MetricsAssignmentManagerSourceImpl
MetricsMaster	This class is for maintaining the various master statistics and publishing them through the metrics interfaces.
MetricsMasterFileSystem
MetricsMasterFilesystemSourceImpl
MetricsMasterProcSourceFactoryImpl	Factory to create MetricsMasterProcSource when given a MetricsMasterWrapper
MetricsMasterProcSourceImpl	Hadoop2 implementation of MetricsMasterSource.
MetricsMasterSourceFactoryImpl	Factory to create MetricsMasterSource when given a MetricsMasterWrapper
MetricsMasterSourceImpl	Hadoop2 implementation of MetricsMasterSource.
MetricsMasterWrapperImpl	Impl for exposing HMaster Information through JMX
MetricsSnapshot
MetricsSnapshotSourceImpl
MobFileCompactionChore	The Class MobFileCompactChore for running compaction regularly to merge small mob files.
OfflineCallback	Callback handler for creating unassigned offline znodes used during bulk assign, async setting region to offline.
RackManager	Wrapper over the rack resolution utility in Hadoop.
RegionPlacementMaintainer	A tool that is used for manipulating and viewing favored nodes information for regions.
RegionPlacementMaintainer.RandomizedMatrix	Some algorithms for solving the assignment problem may traverse workers or jobs in linear order which may result in skewing the assignments of the first jobs in the matrix toward the last workers in the matrix if the costs are uniform.
RegionPlan	Stores the plan for the move of an individual region.
RegionPlan.RegionPlanComparator
RegionState	State of a Region while undergoing transitions.
RegionStates	Region state accountant.
RegionStateStore	A helper to persist region state in meta.
ServerManager	The ServerManager class manages info about region servers.
SnapshotOfRegionAssignmentFromMeta	Used internally for reading meta and constructing datastructures that are then queried, for things like regions to regionservers, table to regions, etc.
SplitLogManager	Distributes the task of log splitting to the available region servers.
SplitLogManager.Task	in memory state of an active task.
SplitLogManager.TaskBatch	Keeps track of the batch of tasks submitted together by a caller in splitLogDistributed().
TableLockManager	A manager for distributed table level locks.
TableLockManager.NullTableLockManager	A null implementation
TableNamespaceManager	This is a helper class used to manage the namespace metadata that is stored in TableName.NAMESPACE_TABLE_NAME It also mirrors updates to the ZK store by forwarding updates to ZKNamespaceManager
UnAssignCallable	A callable object that invokes the corresponding action that needs to be taken for unassignment of a region in transition.

Enum Summary

Enum	Description
AssignmentManager.ServerHostRegion
RegionState.State
SplitLogManager.ResubmitDirective
SplitLogManager.TerminationStatus