Package org.apache.hadoop.hbase.util

package org.apache.hadoop.hbase.util

Related Packages

Package	Description
org.apache.hadoop.hbase
org.apache.hadoop.hbase.util.compaction
org.apache.hadoop.hbase.util.hbck

Class	Description
org.apache.hadoop.hbase.util.AbstractByteRange	An abstract implementation of the ByteRange API
org.apache.hadoop.hbase.util.AbstractFileStatusFilter	Typical base class for file status filter.
org.apache.hadoop.hbase.util.AbstractHBaseTool	Common base class used for HBase command-line tools.
org.apache.hadoop.hbase.util.AbstractPositionedByteRange	Extends the basic SimpleByteRange implementation with position support.
org.apache.hadoop.hbase.util.Addressing	Utility for network addresses, resolving and naming.
org.apache.hadoop.hbase.util.Addressing.AddressSelectionCondition	Interface for AddressSelectionCondition to check if address is acceptable
org.apache.hadoop.hbase.util.AtomicUtils	Utilities related to atomic operations.
org.apache.hadoop.hbase.util.AvlUtil	Helper class that allows to create and manipulate an AvlTree.
org.apache.hadoop.hbase.util.AvlUtil.AvlInsertOrReplace<TNode extends org.apache.hadoop.hbase.util.AvlUtil.AvlNode>
org.apache.hadoop.hbase.util.AvlUtil.AvlIterableList	Helper class that allows to create and manipulate a linked list of AvlLinkedNodes
org.apache.hadoop.hbase.util.AvlUtil.AvlKeyComparator<TNode extends org.apache.hadoop.hbase.util.AvlUtil.AvlNode>	The AvlTree allows to lookup an object using a custom key.
org.apache.hadoop.hbase.util.AvlUtil.AvlLinkedNode<TNode extends org.apache.hadoop.hbase.util.AvlUtil.AvlLinkedNode>	This class extends the AvlNode and adds two links that will be used in conjunction with the AvlIterableList class.
org.apache.hadoop.hbase.util.AvlUtil.AvlNode<TNode extends org.apache.hadoop.hbase.util.AvlUtil.AvlNode>	This class represent a node that will be used in an AvlTree.
org.apache.hadoop.hbase.util.AvlUtil.AvlNodeVisitor<TNode extends org.apache.hadoop.hbase.util.AvlUtil.AvlNode>	Visitor that allows to traverse a set of AvlNodes.
org.apache.hadoop.hbase.util.AvlUtil.AvlTree	Helper class that allows to create and manipulate an AVL Tree
org.apache.hadoop.hbase.util.AvlUtil.AvlTreeIterator<TNode extends org.apache.hadoop.hbase.util.AvlUtil.AvlNode>	Iterator for the AvlTree
org.apache.hadoop.hbase.util.BloomContext	The bloom context that is used by the StorefileWriter to add the bloom details per cell
org.apache.hadoop.hbase.util.BloomFilter	Implements a Bloom filter, as defined by Bloom in 1970.
org.apache.hadoop.hbase.util.BloomFilterBase	Common methods Bloom filter methods required at read and write time.
org.apache.hadoop.hbase.util.BloomFilterChunk	The basic building block for the CompoundBloomFilter
org.apache.hadoop.hbase.util.BloomFilterFactory	Handles Bloom filter initialization based on configuration and serialized metadata in the reader and writer of HStoreFile.
org.apache.hadoop.hbase.util.BloomFilterUtil	Utility methods related to BloomFilters
org.apache.hadoop.hbase.util.BloomFilterWriter	Specifies methods needed to add elements to a Bloom filter and serialize the resulting Bloom filter as a sequence of bytes.
org.apache.hadoop.hbase.util.BoundedCompletionService<V>	A completion service, close to the one available in the JDK 1.7 However, this ones keeps the list of the future, and allows to cancel them all.
org.apache.hadoop.hbase.util.BoundedPriorityBlockingQueue<E>	A generic bounded blocking Priority-Queue.
org.apache.hadoop.hbase.util.ByteArrayHashKey
org.apache.hadoop.hbase.util.ByteBufferAllocator	Defines the way the ByteBuffers are created
org.apache.hadoop.hbase.util.ByteBufferArray	This class manages an array of ByteBuffers with a default size 4MB.
org.apache.hadoop.hbase.util.ByteBufferUtils	Utility functions for working with byte buffers, such as reading/writing variable-length long numbers.
org.apache.hadoop.hbase.util.ByteRange	Lightweight, reusable class for specifying ranges of byte[]'s.
org.apache.hadoop.hbase.util.ByteRangeUtils	Utility methods for working with ByteRange.
org.apache.hadoop.hbase.util.Bytes	Utility class that handles byte arrays, conversions to/from other types, comparisons, hash code generation, manufacturing keys for HashMaps or HashSets, and can be used as key in maps or trees.
org.apache.hadoop.hbase.util.Bytes.ByteArrayComparator	Byte array comparator class.
org.apache.hadoop.hbase.util.Bytes.RowEndKeyComparator	A Bytes.ByteArrayComparator that treats the empty array as the largest value.
org.apache.hadoop.hbase.util.CancelableProgressable	Similar interface as Progressable but returns a boolean to support canceling the operation.
org.apache.hadoop.hbase.util.CellHashKey	Extracts the byte for the hash calculation from the given cell
org.apache.hadoop.hbase.util.ChecksumType	Checksum types.
org.apache.hadoop.hbase.util.Classes	Utilities for class manipulation.
org.apache.hadoop.hbase.util.ClassLoaderBase	Base class loader that defines couple shared constants used by sub-classes.
org.apache.hadoop.hbase.util.ClassSize	Class for determining the "size" of a class, an attempt to calculate the actual bytes that an object of this class will occupy in memory The core of this class is taken from the Derby project
org.apache.hadoop.hbase.util.ClientUtils	Common Utility class for clients
org.apache.hadoop.hbase.util.CollectionBackedScanner	Utility scanner that wraps a sortable collection and serves as a KeyValueScanner.
org.apache.hadoop.hbase.util.CommonFSUtils	Utility methods for interacting with the underlying file system.
org.apache.hadoop.hbase.util.CommonFSUtils.StreamLacksCapabilityException	Helper exception for those cases where the place where we need to check a stream capability is not where we have the needed context to explain the impact and mitigation for a lack.
org.apache.hadoop.hbase.util.CompressionTest	Compression validation test.
org.apache.hadoop.hbase.util.ConcatenatedLists<T>	A collection class that contains multiple sub-lists, which allows us to not copy lists.
org.apache.hadoop.hbase.util.ConcurrentMapUtils	Utility methods for dealing with Collections, including treating null collections as empty.
org.apache.hadoop.hbase.util.ConfigurationUtil	Utilities for storing more complex collection types in Configuration instances.
org.apache.hadoop.hbase.util.ConnectionCache	A utility to store user specific HConnections in memory.
org.apache.hadoop.hbase.util.CoprocessorClassLoader	ClassLoader used to load classes for Coprocessor instances.
org.apache.hadoop.hbase.util.CoprocessorConfigurationUtil	Helper class for coprocessor host when configuration changes.
org.apache.hadoop.hbase.util.DefaultEnvironmentEdge	Default implementation of an environment edge.
org.apache.hadoop.hbase.util.DirectMemoryUtils	Utilities for interacting with and monitoring DirectByteBuffer allocations.
org.apache.hadoop.hbase.util.DNS	Wrapper around Hadoop's DNS class to hide reflection.
org.apache.hadoop.hbase.util.DNS.ServerType
org.apache.hadoop.hbase.util.DynamicClassLoader	This is a class loader that can load classes dynamically from new jar files under a configured folder.
org.apache.hadoop.hbase.util.EncryptionTest
org.apache.hadoop.hbase.util.EnvironmentEdge	Has some basic interaction with the environment.
org.apache.hadoop.hbase.util.EnvironmentEdgeManager	Manages a singleton instance of the environment edge.
org.apache.hadoop.hbase.util.ExceptionUtil	This class handles the different interruption classes.
org.apache.hadoop.hbase.util.ExponentialMovingAverage<T>	EMA is similar to WeightedMovingAverage in weighted, but the weighting factor decrease exponentially.
org.apache.hadoop.hbase.util.FileStatusFilter
org.apache.hadoop.hbase.util.FileSystemVersionException	Thrown when the file system needs to be upgraded
org.apache.hadoop.hbase.util.FSTableDescriptors	Implementation of TableDescriptors that reads descriptors from the passed filesystem.
org.apache.hadoop.hbase.util.FSUtils	Utility methods for interacting with the underlying file system.
org.apache.hadoop.hbase.util.FSUtils.BlackListDirFilter	Directory filter that doesn't include any of the directories in the specified blacklist
org.apache.hadoop.hbase.util.FSUtils.DirFilter	A PathFilter that only allows directories.
org.apache.hadoop.hbase.util.FSUtils.FamilyDirFilter	Filter for all dirs that are legal column family names.
org.apache.hadoop.hbase.util.FSUtils.HFileFilter	Filter for HFiles that excludes reference files.
org.apache.hadoop.hbase.util.FSUtils.HFileLinkFilter	Filter for HFileLinks (StoreFiles and HFiles not included).
org.apache.hadoop.hbase.util.FSUtils.ReferenceAndLinkFileFilter
org.apache.hadoop.hbase.util.FSUtils.ReferenceFileFilter
org.apache.hadoop.hbase.util.FSUtils.RegionDirFilter	Filter for all dirs that don't start with '.'
org.apache.hadoop.hbase.util.FSUtils.UserTableDirFilter	A PathFilter that returns usertable directories.
org.apache.hadoop.hbase.util.FSVisitor	Utility methods for interacting with the hbase.root file system.
org.apache.hadoop.hbase.util.FSVisitor.StoreFileVisitor
org.apache.hadoop.hbase.util.FutureUtils	Helper class for processing futures.
org.apache.hadoop.hbase.util.GetJavaProperty	A generic way for querying Java properties.
org.apache.hadoop.hbase.util.GsonUtil	Helper class for gson.
org.apache.hadoop.hbase.util.Hash	This class represents a common API for hashing functions.
org.apache.hadoop.hbase.util.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.
org.apache.hadoop.hbase.util.HashKey<T>	Used to calculate the hash Hash algorithms for Bloomfilters.
org.apache.hadoop.hbase.util.HBaseConfTool	Tool that prints out a configuration.
org.apache.hadoop.hbase.util.HBaseFsck	Deprecated. For removal in hbase-4.0.0.
org.apache.hadoop.hbase.util.HBaseFsckRepair	This class contains helper methods that repair parts of hbase's filesystem contents.
org.apache.hadoop.hbase.util.HbckErrorReporter	Deprecated. Since 2.3.0.
org.apache.hadoop.hbase.util.HbckErrorReporter.ERROR_CODE
org.apache.hadoop.hbase.util.HbckRegionInfo	Maintain information about a particular region.
org.apache.hadoop.hbase.util.HbckRegionInfo.HdfsEntry	Stores the regioninfo entries from HDFS
org.apache.hadoop.hbase.util.HbckRegionInfo.MetaEntry	Stores the regioninfo entries scanned from META
org.apache.hadoop.hbase.util.HbckTableInfo	Maintain information about a particular table.
org.apache.hadoop.hbase.util.HFileArchiveUtil	Helper class for all utilities related to archival/retrieval of HFiles
org.apache.hadoop.hbase.util.IdLock	Allows multiple concurrent clients to lock on a numeric id with a minimal memory overhead.
org.apache.hadoop.hbase.util.IdLock.Entry	An entry returned to the client as a lock object
org.apache.hadoop.hbase.util.IdReadWriteLock<T>	Allows multiple concurrent clients to lock on a numeric id with ReentrantReadWriteLock.
org.apache.hadoop.hbase.util.IdReadWriteLockStrongRef<T>
org.apache.hadoop.hbase.util.IdReadWriteLockWithObjectPool<T>
org.apache.hadoop.hbase.util.IdReadWriteLockWithObjectPool.ReferenceType
org.apache.hadoop.hbase.util.ImmutableByteArray	Mainly used as keys for HashMap.
org.apache.hadoop.hbase.util.IncrementingEnvironmentEdge	Uses an incrementing algorithm instead of the default.
org.apache.hadoop.hbase.util.IOExceptionConsumer<T>
org.apache.hadoop.hbase.util.IOExceptionRunnable
org.apache.hadoop.hbase.util.IOExceptionSupplier<V>	A supplier that throws IOException when get.
org.apache.hadoop.hbase.util.JenkinsHash	Produces 32-bit hash for hash table lookup.
org.apache.hadoop.hbase.util.JRubyFormat	Utility class for converting objects to JRuby.
org.apache.hadoop.hbase.util.JSONBean	Utility for doing JSON and MBeans.
org.apache.hadoop.hbase.util.JSONBean.Writer	Use dumping out mbeans as JSON.
org.apache.hadoop.hbase.util.JsonMapper	Utility class for converting objects to JSON
org.apache.hadoop.hbase.util.JSONMetricUtil
org.apache.hadoop.hbase.util.JVM	This class is a wrapper for the implementation of com.sun.management.UnixOperatingSystemMXBean It will decide to use the sun api or its own implementation depending on the runtime (vendor) used.
org.apache.hadoop.hbase.util.JVMClusterUtil	Utility used running a cluster all in the one JVM.
org.apache.hadoop.hbase.util.JVMClusterUtil.MasterThread	Datastructure to hold Master Thread and Master instance
org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread	Datastructure to hold RegionServer Thread and RegionServer instance
org.apache.hadoop.hbase.util.JvmPauseMonitor	Class which sets up a simple thread which runs in a loop sleeping for a short interval of time.
org.apache.hadoop.hbase.util.JvmVersion	Utility class to get and check the current JVM version.
org.apache.hadoop.hbase.util.KerberosUtils
org.apache.hadoop.hbase.util.KeyLocker<K>	A utility class to manage a set of locks.
org.apache.hadoop.hbase.util.KeyRange	A key range use in split coverage.
org.apache.hadoop.hbase.util.LeaseNotRecoveredException	Thrown when the lease was expected to be recovered, but the file can't be opened.
org.apache.hadoop.hbase.util.LoadTestDataGeneratorWithMOB	A load test data generator for MOB
org.apache.hadoop.hbase.util.LoadTestDataGeneratorWithTags
org.apache.hadoop.hbase.util.LoadTestKVGenerator	A generator of random keys and values for load testing.
org.apache.hadoop.hbase.util.LoadTestTool	A command-line utility that reads, writes, and verifies data.
org.apache.hadoop.hbase.util.LoadTestUtil	This class was created by moving all load test related code from HFileTestUtil and HBaseTestingUtil as part of refactoring for hbase-diagnostics module creation in HBASE-28432
org.apache.hadoop.hbase.util.LocatedBlockHelper	hadoop 3.3.1 changed the return value of this method from DatanodeInfo[] to DatanodeInfoWithStorage[], which causes the JVM can not locate the method if we are compiled with hadoop 3.2 and then link with hadoop 3.3+, so here we need to use reflection to make it work for both hadoop versions, otherwise we need to publish more artifacts for different hadoop versions...
org.apache.hadoop.hbase.util.LogMonitoring	Utility functions for reading the log4j logs that are being written by HBase.
org.apache.hadoop.hbase.util.LossyCounting<T>	LossyCounting utility, bounded data structure that maintains approximate high frequency elements in data stream.
org.apache.hadoop.hbase.util.LossyCounting.LossyCountingListener<T>
org.apache.hadoop.hbase.util.ManualEnvironmentEdge	An environment edge that uses a manually set value.
org.apache.hadoop.hbase.util.MapreduceDependencyClasspathTool	Generate a classpath string containing any jars required by mapreduce jobs.
org.apache.hadoop.hbase.util.MapReduceExtendedCell	A wrapper for a cell to be used with mapreduce, as the output value class for mappers/reducers.
org.apache.hadoop.hbase.util.MD5Hash	Utility class for MD5 MD5 hash produces a 128-bit digest.
org.apache.hadoop.hbase.util.Methods
org.apache.hadoop.hbase.util.ModifyRegionUtils	Utility methods for interacting with the regions.
org.apache.hadoop.hbase.util.ModifyRegionUtils.RegionEditTask
org.apache.hadoop.hbase.util.ModifyRegionUtils.RegionFillTask
org.apache.hadoop.hbase.util.MovingAverage<T>	The purpose of introduction of MovingAverage mainly is to measure execution time of a specific method, which can help us to know its performance fluctuation in response to different machine states or situations, better case, then to act accordingly.
org.apache.hadoop.hbase.util.MultiThreadedAction	Common base class for reader and writer parts of multi-thread HBase load test (See LoadTestTool).
org.apache.hadoop.hbase.util.MultiThreadedAction.DefaultDataGenerator	Default implementation of LoadTestDataGenerator that uses LoadTestKVGenerator, fixed set of column families, and random number of columns in range.
org.apache.hadoop.hbase.util.MultiThreadedReader	Creates multiple threads that read and verify previously written data
org.apache.hadoop.hbase.util.MultiThreadedReaderWithACL	A MultiThreadReader that helps to work with ACL
org.apache.hadoop.hbase.util.MultiThreadedUpdater	Creates multiple threads that write key/values into the
org.apache.hadoop.hbase.util.MultiThreadedUpdaterWithACL	A MultiThreadUpdater that helps to work with ACL
org.apache.hadoop.hbase.util.MultiThreadedWriter	Creates multiple threads that write key/values into the
org.apache.hadoop.hbase.util.MultiThreadedWriterBase	Creates multiple threads that write key/values into the
org.apache.hadoop.hbase.util.MultiThreadedWriterWithACL	MultiThreadedWriter that helps in testing ACL
org.apache.hadoop.hbase.util.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".
org.apache.hadoop.hbase.util.MurmurHash	This is a very fast, non-cryptographic hash suitable for general hash-based lookup.
org.apache.hadoop.hbase.util.MurmurHash3	This is a very fast, non-cryptographic hash suitable for general hash-based lookup.
org.apache.hadoop.hbase.util.NettyEventLoopGroupConfig	Event loop group related config.
org.apache.hadoop.hbase.util.NettyFutureUtils	Helper class for processing netty futures.
org.apache.hadoop.hbase.util.NettyUnsafeUtils	Wraps some usages of netty's unsafe API, for ease of maintainability.
org.apache.hadoop.hbase.util.NonceKey	This implementation is not smart and just treats nonce group and nonce as random bits.
org.apache.hadoop.hbase.util.ObjectIntPair<T>	A generic class for pair of an Object and and a primitive int value.
org.apache.hadoop.hbase.util.ObjectPool<K,V>	A thread-safe shared object pool in which object creation is expected to be lightweight, and the objects may be excessively created and discarded.
org.apache.hadoop.hbase.util.ObjectPool.ObjectFactory<K,V>	An ObjectFactory object is used to create new shared objects on demand.
org.apache.hadoop.hbase.util.OOMEChecker
org.apache.hadoop.hbase.util.Order	Used to describe or modify the lexicographical sort order of a byte[].
org.apache.hadoop.hbase.util.OrderedBytes	Utility class that handles ordered byte arrays.
org.apache.hadoop.hbase.util.Pair<T1,T2>	A generic class for pairs.
org.apache.hadoop.hbase.util.PairOfSameType<T>	A generic, immutable class for pairs of objects both of type T.
org.apache.hadoop.hbase.util.PoolMap<K,V>	The PoolMap maps a key to a collection of values, the elements of which are managed by a pool.
org.apache.hadoop.hbase.util.PoolMap.Pool<R>
org.apache.hadoop.hbase.util.PoolMap.PoolResourceSupplier<R>
org.apache.hadoop.hbase.util.PoolMap.PoolType
org.apache.hadoop.hbase.util.PositionedByteRange	Extends ByteRange with additional methods to support tracking a consumers position within the viewport.
org.apache.hadoop.hbase.util.PrettyPrinter
org.apache.hadoop.hbase.util.PrettyPrinter.Unit
org.apache.hadoop.hbase.util.ProcessUtils	Process related utilities.
org.apache.hadoop.hbase.util.Random64	An instance of this class is used to generate a stream of pseudorandom numbers.
org.apache.hadoop.hbase.util.RandomDistribution	A class that generates random numbers that follow some distribution.
org.apache.hadoop.hbase.util.RandomDistribution.Binomial	Binomial distribution.
org.apache.hadoop.hbase.util.RandomDistribution.DiscreteRNG	Interface for discrete (integer) random distributions.
org.apache.hadoop.hbase.util.RandomDistribution.Flat	P(i)=1/(max-min)
org.apache.hadoop.hbase.util.RandomDistribution.Zipf	Zipf distribution.
org.apache.hadoop.hbase.util.ReadOnlyByteRangeException	Exception thrown when a read only byte range is modified
org.apache.hadoop.hbase.util.RecoverLeaseFSUtils	Utility methods for recovering file lease for hdfs.
org.apache.hadoop.hbase.util.ReflectedFunctionCache<I,R>	Cache to hold resolved Functions of a specific signature, generated through reflection.
org.apache.hadoop.hbase.util.ReflectionUtils
org.apache.hadoop.hbase.util.RegionMover	Tool for loading/unloading regions to/from given regionserver This tool can be run from Command line directly as a utility.
org.apache.hadoop.hbase.util.RegionMover.RegionMoverBuilder	Builder for Region mover.
org.apache.hadoop.hbase.util.RegionSplitCalculator<R extends org.apache.hadoop.hbase.util.KeyRange>	This is a generic region split calculator.
org.apache.hadoop.hbase.util.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.
org.apache.hadoop.hbase.util.RegionSplitter.DecimalStringSplit	The format of a DecimalStringSplit region boundary is the ASCII representation of reversed sequential number, or any other uniformly distributed decimal value.
org.apache.hadoop.hbase.util.RegionSplitter.HexStringSplit	HexStringSplit is a well-known RegionSplitter.SplitAlgorithm for choosing region boundaries.
org.apache.hadoop.hbase.util.RegionSplitter.NumberStringSplit
org.apache.hadoop.hbase.util.RegionSplitter.SplitAlgorithm	A generic interface for the RegionSplitter code to use for all it's functionality.
org.apache.hadoop.hbase.util.RegionSplitter.UniformSplit	A SplitAlgorithm that divides the space of possible keys evenly.
org.apache.hadoop.hbase.util.ReservoirSample<T>	The simple version of reservoir sampling implementation.
org.apache.hadoop.hbase.util.RetryCounter	Operation retry accounting.
org.apache.hadoop.hbase.util.RetryCounter.BackoffPolicy	Policy for calculating sleeping intervals between retry attempts
org.apache.hadoop.hbase.util.RetryCounter.ExponentialBackoffPolicy
org.apache.hadoop.hbase.util.RetryCounter.ExponentialBackoffPolicyWithLimit
org.apache.hadoop.hbase.util.RetryCounter.RetryConfig	Configuration for a retry counter
org.apache.hadoop.hbase.util.RetryCounterFactory
org.apache.hadoop.hbase.util.RollingStatCalculator	This class maintains mean and variation for any sequence of input provided to it.
org.apache.hadoop.hbase.util.RotateFile	A file storage which supports atomic update through two files, i.e, rotating.
org.apache.hadoop.hbase.util.RowBloomContext	Handles ROW bloom related context.
org.apache.hadoop.hbase.util.RowBloomHashKey
org.apache.hadoop.hbase.util.RowColBloomContext	Handles ROWCOL bloom related context.
org.apache.hadoop.hbase.util.RowColBloomHashKey	An hash key for ROWCOL bloom.
org.apache.hadoop.hbase.util.RowPrefixFixedLengthBloomContext	Handles ROWPREFIX bloom related context.
org.apache.hadoop.hbase.util.ServerCommandLine	Base class for command lines that start up various HBase daemons.
org.apache.hadoop.hbase.util.ServerRegionReplicaUtil	Similar to RegionReplicaUtil but for the server side
org.apache.hadoop.hbase.util.ShutdownHookManager	This class provides ShutdownHookManager shims for HBase to interact with the Hadoop 1.0.x and the Hadoop 2.0+ series.
org.apache.hadoop.hbase.util.SimpleByteRange	A read only version of the ByteRange.
org.apache.hadoop.hbase.util.SimpleMovingAverage<T>	SMA measure the overall average execution time of a specific method.
org.apache.hadoop.hbase.util.SimpleMutableByteRange	A basic mutable ByteRange implementation.
org.apache.hadoop.hbase.util.SimplePositionedByteRange	Extends the basic SimpleMutableByteRange implementation with position support and it is a readonly version.
org.apache.hadoop.hbase.util.SimplePositionedMutableByteRange	Extends the basic AbstractPositionedByteRange implementation with position support and it is a mutable version.
org.apache.hadoop.hbase.util.Sleeper	Sleeper for current thread.
org.apache.hadoop.hbase.util.SoftObjectPool<K,V>	A SoftReference based shared object pool.
org.apache.hadoop.hbase.util.SortedList<E>	Simple sorted list implementation that uses ArrayList as the underlying collection so we can support RandomAccess.
org.apache.hadoop.hbase.util.StealJobQueue<T>	This queue allows a ThreadPoolExecutor to steal jobs from another ThreadPoolExecutor.
org.apache.hadoop.hbase.util.Strings	Utility for Strings.
org.apache.hadoop.hbase.util.TableDescriptorChecker	Only used for master to sanity check TableDescriptor.
org.apache.hadoop.hbase.util.Threads	Thread Utility
org.apache.hadoop.hbase.util.TimeMeasurable<T>	Methods that implement this interface can be measured elapsed time.
org.apache.hadoop.hbase.util.Triple<A,B,C>	Utility class to manage a triple.
org.apache.hadoop.hbase.util.UnsafeAccess
org.apache.hadoop.hbase.util.VersionInfo	This class finds the Version information for HBase.
org.apache.hadoop.hbase.util.WALPerformanceEvaluationUtil	This class contains code copied from HBaseTestingUtil and its super classes required by WALPerformanceEvaluation.
org.apache.hadoop.hbase.util.WeakObjectPool<K,V>	A WeakReference based shared object pool.
org.apache.hadoop.hbase.util.WeightedMovingAverage<T>	Different from SMA SimpleMovingAverage, WeightedMovingAverage gives each data different weight.
org.apache.hadoop.hbase.util.WindowMovingAverage<T>	Instead of calculate a whole time average, this class focus on the last N.
org.apache.hadoop.hbase.util.Writables	Utility class with methods for manipulating Writable objects
org.apache.hadoop.hbase.util.YammerHistogramUtils	Utility functions for working with Yammer Metrics.