Package org.apache.hadoop.hdfs.util

Interface Summary

Interface	Description
Diff.Element<K>	An interface for the elements in a Diff.
Diff.Processor<E>	An interface for passing a method in order to process elements.
EnumCounters.Factory<E extends Enum<E>,C extends EnumCounters<E>>	A factory for creating counters.
ReadOnlyList<E>	A ReadOnlyList is a unmodifiable list, which supports read-only operations.
RwLock	Read-write lock interface.

Class Summary

Class	Description
AtomicFileOutputStream	A FileOutputStream that has the property that it will only show up at its destination once it has been entirely written and flushed to disk.
BestEffortLongFile	Class that represents a file on disk which stores a single long value, but does not make any effort to make it truly durable.
ByteArray	Wrapper for byte[] to use byte[] as key in HashMap
ByteBufferOutputStream	OutputStream that writes into a ByteBuffer.
Canceler	Provides a simple interface where one thread can mark an operation for cancellation, and another thread can poll for whether the cancellation has occurred.
CyclicIteration<K,V>	Provide an cyclic Iterator for a NavigableMap.
DataTransferThrottler	a class to throttle the data transfers.
Diff<K,E extends Diff.Element<K>>	The difference between the current state and a previous state of a list.
Diff.Container<E>	Containing exactly one element.
Diff.UndoInfo<E>	Undo information for some operations such as delete(E) and Diff.modify(Element, Element).
DirectBufferPool	A simple class for pooling direct ByteBuffers.
EnumCounters<E extends Enum<E>>	Counters for an enum type.
EnumCounters.Map<K,E extends Enum<E>,C extends EnumCounters<E>>	A key-value map which maps the keys to EnumCounters.
ExactSizeInputStream	An InputStream implementations which reads from some other InputStream but expects an exact number of bytes.
Holder<T>	A Holder is simply a wrapper around some other object.
LightWeightHashSet<T>	A low memory linked hash set implementation, which uses an array for storing the elements and linked lists for collision resolution.
LightWeightLinkedSet<T>	A low memory linked hash set implementation, which uses an array for storing the elements and linked lists for collision resolution.
MD5FileUtils	Static functions for dealing with files of the same format that the Unix "md5sum" utility writes.
PersistentLongFile	Class that represents a file on disk which persistently stores a single long value.
ReadOnlyList.Util	Utilities for ReadOnlyList
XMLUtils	General xml utilities.
XMLUtils.Stanza	Represents a bag of key-value pairs encountered during parsing an XML file.

Enum Summary

Enum	Description
Diff.ListType

Exception Summary

Exception	Description
XMLUtils.InvalidXmlException	Exception that reflects an invalid XML document.
XMLUtils.UnmanglingError	Exception that reflects a string that cannot be unmangled.