程序包 org.apache.hadoop.hbase.util

接口概要

接口	说明
Addressing.AddressSelectionCondition	Interface for AddressSelectionCondition to check if address is acceptable
ByteRange	Lightweight, reusable class for specifying ranges of byte[]'s.
EnvironmentEdge	Has some basic interaction with the environment.
PositionedByteRange	Extends ByteRange with additional methods to support tracking a consumers position within the viewport.
WeakObjectPool.ObjectFactory<K,V>	An ObjectFactory object is used to create new shared objects on demand.

类概要

类	说明
AbstractByteRange	An abstract implementation of the ByteRange API
AbstractHBaseTool	Common base class used for HBase command-line tools.
AbstractPositionedByteRange	Extends the basic SimpleByteRange implementation with position support.
Addressing	Utility for network addresses, resolving and naming.
ArrayUtils	A set of array utility functions that return reasonable values in cases where an array is allocated or if it is null
AtomicUtils	Utilities related to atomic operations.
Base64	Encodes and decodes to and from Base64 notation.
Base64.Base64InputStream	A Base64.Base64InputStream will read data from another InputStream, given in the constructor, and encode/decode to/from Base64 notation on the fly.
Base64.Base64OutputStream	A Base64.Base64OutputStream will write data to another OutputStream, given in the constructor, and encode/decode to/from Base64 notation on the fly.
BoundedArrayQueue<E>	A bounded non-thread safe implementation of Queue.
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.
ByteBufferArray	This class manages an array of ByteBuffers with a default size 4MB.
ByteBufferUtils	Utility functions for working with byte buffers, such as reading/writing variable-length long numbers.
ByteRangeUtils	Utility methods for working with ByteRange.
Bytes	Utility class that handles byte arrays, conversions to/from other types, comparisons, hash code generation, manufacturing keys for HashMaps or HashSets, etc.
Bytes.ByteArrayComparator	Byte array comparator class.
Bytes.RowEndKeyComparator	A Bytes.ByteArrayComparator that treats the empty array as the largest value.
ChecksumFactory	Utility class that is used to generate a Checksum object.
Classes	Utilities for class manipulation.
ClassLoaderBase	Base class loader that defines couple shared constants used by sub-classes.
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
CollectionUtils	Utility methods for dealing with Collections, including treating null collections as empty.
ConcatenatedLists<T>	A collection class that contains multiple sub-lists, which allows us to not copy lists.
CoprocessorClassLoader	ClassLoader used to load classes for Coprocessor instances.
Counter	High scalable counter.
DefaultEnvironmentEdge	Default implementation of an environment edge.
DNS	Wrapper around Hadoop's DNS class to hide reflection.
DrainBarrier	A simple barrier that can be used by classes that need to wait for some operations to finish before stopping/closing/etc. forever.
DynamicClassLoader	This is a class loader that can load classes dynamically from new jar files under a configured folder.
EnvironmentEdgeManager	Manages a singleton instance of the environment edge.
ExceptionUtil	This class handles the different interruption classes.
FastLongHistogram	已过时
ForeignExceptionUtil	Helper to convert Exceptions and StackTraces from/to protobuf.
GsonUtil	Helper class for gson.
Hash	This class represents a common API for hashing functions.
HasThread	Abstract class which contains a Thread and delegates the common Thread methods to that instance.
ImmutableByteArray	Mainly used as keys for HashMap.
IncrementingEnvironmentEdge	Uses an incrementing algorithm instead of the default.
IterableUtils	Utility methods for Iterable including null-safe handlers.
JenkinsHash	Produces 32-bit hash for hash table lookup.
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.
KeyLocker<K>	A utility class to manage a set of locks.
LongAdder	One or more variables that together maintain an initially zero long sum.
MD5Hash	Utility class for MD5 MD5 hash produces a 128-bit digest.
Methods
MurmurHash	This is a very fast, non-cryptographic hash suitable for general hash-based lookup.
MurmurHash3	This is a very fast, non-cryptographic hash suitable for general hash-based lookup.
NonceKey	This implementation is not smart and just treats nonce group and nonce as random bits.
OrderedBytes	Utility class that handles ordered byte arrays.
Pair<T1,T2>	A generic class for pairs.
PairOfSameType<T>	A generic, immutable class for pairs of objects both of type T.
PrettyPrinter
Random64	An instance of this class is used to generate a stream of pseudorandom numbers.
ReflectionUtils
RetryCounter
RetryCounter.BackoffPolicy	Policy for calculating sleeping intervals between retry attempts
RetryCounter.ExponentialBackoffPolicy
RetryCounter.ExponentialBackoffPolicyWithLimit
RetryCounter.RetryConfig	Configuration for a retry counter
RetryCounterFactory
SimpleByteRange	A read only version of the ByteRange.
SimpleMutableByteRange	A basic mutable ByteRange implementation.
SimplePositionedByteRange	Extends the basic SimpleMutableByteRange implementation with position support and it is a readonly version.
SimplePositionedMutableByteRange	Extends the basic AbstractPositionedByteRange implementation with position support and it is a mutable version.
Sleeper	Sleeper for current thread.
Strings	Utility for Strings.
Threads	Thread Utility
Triple<A,B,C>	Utility class to manage a triple.
UnsafeAccess
UnsafeAvailChecker
VersionInfo	This class finds the Version information for HBase.
WeakObjectPool<K,V>	A WeakReference based shared object pool.

枚举概要

枚举	说明
ChecksumType	Checksum types.
Order	Used to describe or modify the lexicographical sort order of a byte[].
PrettyPrinter.Unit

异常错误概要

异常错误	说明
ReadOnlyByteRangeException	Exception thrown when a read only byte range is modified