Package org.apache.hadoop.util

Common utilities.

See:
Description

Interface Summary

IndexedSortable	Interface for collections capable of being sorted by IndexedSorter algorithms.
IndexedSorter	Interface for sort algorithms accepting IndexedSortable items.
Progressable	A facility for reporting progress.
Tool	A tool interface that supports handling of generic command-line options.

Class Summary

Daemon	A thread that has called Thread.setDaemon(boolean) with true.
DiskChecker	Class that provides utility functions for checking disk problem
GenericOptionsParser	GenericOptionsParser is a utility to parse command line arguments generic to the Hadoop framework.
GenericsUtil	Contains utility methods for dealing with Java Generics.
HeapSort	An implementation of the core algorithm of HeapSort.
HostsFileReader
MergeSort	An implementation of the core algorithm of MergeSort.
NativeCodeLoader	A helper to load the native hadoop code i.e.
PlatformName	A helper class for getting build-info of the java-vm.
PrintJarMainClass	A micro-application that prints the main class name out of a jar file.
PriorityQueue	A PriorityQueue maintains a partial ordering of its elements such that the least element can always be found in constant time.
ProgramDriver	A driver that is used to run programs added to it
Progress	Utility to assist with generation of progress reports.
QuickSort	An implementation of the core algorithm of QuickSort.
ReflectionUtils	General reflection utils
RunJar	Run a Hadoop job jar.
ServletUtil
Shell	A base class for running a Unix command.
Shell.ShellCommandExecutor	A simple shell command executor.
StringUtils	General string utils
ToolRunner	A utility to help run Tools.
VersionInfo	This class finds the package info for Hadoop and the HadoopVersionAnnotation information.
XMLUtils	General xml utilities.

Exception Summary

DiskChecker.DiskErrorException
DiskChecker.DiskOutOfSpaceException
Shell.ExitCodeException	This is an IOException with exit code added.

Package org.apache.hadoop.util Description

Common utilities.