Package org.apache.hadoop.util

Class Daemon

java.lang.Object

java.lang.Thread

org.apache.hadoop.util.Daemon

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

Daemon.DaemonFactory

@LimitedPrivate({"HDFS","MapReduce"})
@Unstable
public class Daemon
extends java.lang.Thread

A thread that has called Thread.setDaemon(boolean) with true.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Daemon.DaemonFactory	Provide a factory for named daemon threads, for use in ExecutorServices constructors

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor	Description
Daemon()	Construct a daemon thread.
Daemon(java.lang.Runnable runnable)	Construct a daemon thread.
Daemon(java.lang.ThreadGroup group, java.lang.Runnable runnable)	Construct a daemon thread to be part of a specified thread group.

Method Summary

Modifier and Type	Method	Description
java.lang.Runnable	getRunnable()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, onSpinWait, resume, run, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Daemon

public Daemon()

Construct a daemon thread.

Daemon

public Daemon(java.lang.Runnable runnable)

Construct a daemon thread.

Parameters:

runnable - runnable.

Daemon

public Daemon(java.lang.ThreadGroup group,
              java.lang.Runnable runnable)

Construct a daemon thread to be part of a specified thread group.

Parameters:

group - thread group.

runnable - runnable.

Method Detail

getRunnable

public java.lang.Runnable getRunnable()