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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. |
| ServicePlugin | Service plug-in interface. |
| Tool | A tool interface that supports handling of generic command-line options. |
| Class Summary | |
|---|---|
| ChecksumUtil | |
| ClassUtil | |
| CyclicIteration<K,V> | Provide an cyclic Iterator for a NavigableMap. |
| Daemon | A thread that has called Thread.setDaemon(boolean) with true. |
| DataChecksum | This class provides inteface and utilities for processing checksums for DFS data transfers. |
| 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 | |
| LineReader | A class that provides a line reader from an input stream. |
| LinuxMemoryCalculatorPlugin | Deprecated. Use LinuxResourceCalculatorPlugin
instead |
| LinuxResourceCalculatorPlugin | Plugin to calculate resource information on Linux systems. |
| MemoryCalculatorPlugin | Deprecated. Use
ResourceCalculatorPlugin
instead |
| 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<T> | A PriorityQueue maintains a partial ordering of its elements such that the least element can always be found in constant time. |
| ProcessTree | Process tree related operations |
| ProcfsBasedProcessTree | A Proc file-system based ProcessTree. |
| ProgramDriver | A driver that is used to run programs added to it |
| Progress | Utility to assist with generation of progress reports. |
| PureJavaCrc32 | A pure-java implementation of the CRC32 checksum that uses the same polynomial as the built-in native CRC32. |
| QueueProcessingStatistics | Hadoop has several work queues, such as
FSNamesystem.neededReplications
With a properly throttled queue, a worker thread cycles repeatedly,
doing a chunk of work each cycle then resting a bit, until the queue is
empty. |
| QuickSort | An implementation of the core algorithm of QuickSort. |
| ReflectionUtils | General reflection utils |
| ResourceCalculatorPlugin | Plugin to calculate resource information on the system. |
| ResourceCalculatorPlugin.ProcResourceValues | |
| 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. |
| UTF8ByteArrayUtils | |
| VersionInfo | This class finds the package info for Hadoop and the HadoopVersionAnnotation information. |
| XMLUtils | General xml utilities. |
| Enum Summary | |
|---|---|
| ProcessTree.Signal | The constants for the signals. |
| QueueProcessingStatistics.State | This enum provides the "states" of a state machine for
QueueProcessingStatistics. |
| StringUtils.TraditionalBinaryPrefix | The traditional binary prefixes, kilo, mega, ..., exa, which can be represented by a 64-bit integer. |
| Exception Summary | |
|---|---|
| DiskChecker.DiskErrorException | |
| DiskChecker.DiskOutOfSpaceException | |
| Shell.ExitCodeException | This is an IOException with exit code added. |
Common utilities.
|
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