Package org.apache.hadoop.hbase.util

Interface Summary

BloomFilter	Defines the general behavior of a bloom filter.
BloomFilterBase	Common methods Bloom filter methods required at read and write time.
BloomFilterWriter	Specifies methods needed to add elements to a Bloom filter and serialize the resulting Bloom filter as a sequence of bytes.
CancelableProgressable	Similar interface as Progressable but returns a boolean to support canceling the operation.
FSVisitor.LogFileVisitor
FSVisitor.RecoveredEditsVisitor
FSVisitor.RegionVisitor
FSVisitor.StoreFileVisitor
HBaseFsck.ErrorReporter
KeyRange	A key range use in split coverage.
ModifyRegionUtils.RegionEditTask
ModifyRegionUtils.RegionFillTask
RegionSplitter.SplitAlgorithm	A generic interface for the RegionSplitter code to use for all it's functionality.

Class Summary

AbstractHBaseTool	Common base class used for HBase command-line tools.
BloomFilterFactory	Handles Bloom filter initialization based on configuration and serialized metadata in the reader and writer of StoreFile.
BoundedConcurrentLinkedQueue<T>	A ConcurrentLinkedQueue that enforces a maximum queue size.
ByteBloomFilter	Implements a Bloom filter, as defined by Bloom in 1970.
CollectionBackedScanner	Utility scanner that wraps a sortable collection and serves as a KeyValueScanner.
CompoundBloomFilter	A Bloom filter implementation built on top of ByteBloomFilter, encapsulating a set of fixed-size Bloom filters written out at the time of HFile generation into the data block stream, and loaded on demand at query time.
CompoundBloomFilterBase
CompoundBloomFilterWriter	Adds methods required for writing a compound Bloom filter to the data section of an HFile to the CompoundBloomFilter class.
CompressionTest	Compression validation test.
ConfigurationUtil	Utilities for storing more complex collection types in Configuration instances.
ConfigUtil	Some configuration related utilities
ConnectionCache	A utility to store user specific HConnections in memory.
DirectMemoryUtils	Utilities for interacting with and monitoring DirectByteBuffer allocations.
EncryptionTest
FSHDFSUtils	Implementation for hdfs
FSMapRUtils	MapR implementation.
FSTableDescriptorMigrationToSubdir	Deprecated. will be removed for the major release after 0.96.
FSTableDescriptors	Implementation of TableDescriptors that reads descriptors from the passed filesystem.
FSUtils	Utility methods for interacting with the underlying file system.
FSUtils.BlackListDirFilter	Directory filter that doesn't include any of the directories in the specified blacklist
FSUtils.DirFilter	A PathFilter that only allows directories.
FSUtils.FamilyDirFilter	Filter for all dirs that are legal column family names.
FSUtils.HFileFilter	Filter for HFiles that excludes reference files.
FSUtils.ReferenceFileFilter
FSUtils.RegionDirFilter	Filter for all dirs that don't start with '.'
FSUtils.UserTableDirFilter	A PathFilter that returns usertable directories.
FSVisitor	Utility methods for interacting with the hbase.root file system.
GetJavaProperty	A generic way for querying Java properties.
HashedBytes	This class encapsulates a byte array and overrides hashCode and equals so that it's identity is based on the data rather than the array instance.
HBaseConfTool	Tool that prints out a configuration.
HBaseFsck	HBaseFsck (hbck) is a tool for checking and repairing region consistency and table integrity problems in a corrupted HBase.
HBaseFsck.HbckInfo	Maintain information about a particular region.
HBaseFsckRepair	This class contains helper methods that repair parts of hbase's filesystem contents.
HFileArchiveUtil	Helper class for all utilities related to archival/retrieval of HFiles
HFileV1Detector	Tool to detect presence of any HFileV1 in the given directory.
HttpServerUtil	HttpServer utility.
IdLock	Allows multiple concurrent clients to lock on a numeric id with a minimal memory overhead.
IdLock.Entry	An entry returned to the client as a lock object
InfoServer	Create a Jetty embedded server to answer http requests.
JVMClusterUtil	Utility used running a cluster all in the one JVM.
JVMClusterUtil.MasterThread	Datastructure to hold Master Thread and Master instance
JVMClusterUtil.RegionServerThread	Datastructure to hold RegionServer Thread and RegionServer instance
JvmPauseMonitor	Class which sets up a simple thread which runs in a loop sleeping for a short interval of time.
JvmVersion	Certain JVM versions are known to be unstable with HBase.
ManualEnvironmentEdge	An environment edge that uses a manually set value.
MapreduceDependencyClasspathTool	Generate a classpath string containing any jars required by mapreduce jobs.
Merge	Utility that can merge any two regions in the same table: adjacent, overlapping or disjoint.
MetaUtils	Contains utility methods for manipulating HBase meta tables.
ModifyRegionUtils	Utility methods for interacting with the regions.
MultiHConnection	Provides ability to create multiple HConnection instances and allows to process a batch of actions using HConnection.processBatchCallback()
MunkresAssignment	Computes the optimal (minimal cost) assignment of jobs to workers (or other analogous) concepts given a cost matrix of each pair of job and worker, using the algorithm by James Munkres in "Algorithms for the Assignment and Transportation Problems", with additional optimizations as described by Jin Kue Wong in "A New Implementation of an Algorithm for the Optimal Assignment Problem: An Improved Version of Munkres' Algorithm".
ProtoUtil
RegionSizeCalculator	Computes size of each region for given table and given column families.
RegionSplitCalculator<R extends KeyRange>	This is a generic region split calculator.
RegionSplitter	The RegionSplitter class provides several utilities to help in the administration lifecycle for developers who choose to manually split regions instead of having HBase handle that automatically.
RegionSplitter.HexStringSplit	HexStringSplit is a well-known RegionSplitter.SplitAlgorithm for choosing region boundaries.
RegionSplitter.UniformSplit	A SplitAlgorithm that divides the space of possible keys evenly.
ServerCommandLine	Base class for command lines that start up various HBase daemons.
ShutdownHookManager	This class provides ShutdownHookManager shims for HBase to interact with the Hadoop 1.0.x and the Hadoop 2.0+ series.
SortedCopyOnWriteSet<E>	Simple SortedSet implementation that uses an internal TreeSet to provide ordering.
SortedList<E>	Simple sorted list implementation that uses ArrayList as the underlying collection so we can support RandomAccess.
YammerHistogramUtils	Utility functions for working with Yammer Metrics.
ZKDataMigrator	Tool to migrate zookeeper data of older hbase versions(<0.95.0) to PB.

Enum Summary

HBaseFsck.ErrorReporter.ERROR_CODE

Exception Summary

HBaseFsck.RegionRepairException	Exception thrown when a integrity repair operation fails in an unresolvable way.
LeaseNotRecoveredException	Thrown when the lease was expected to be recovered, but the file can't be opened.