Package it.unimi.di.law.bubing.frontier

Class DNSThread

java.lang.Object

java.lang.Thread

it.unimi.di.law.bubing.frontier.DNSThread

All Implemented Interfaces:

java.lang.Runnable

public final class DNSThread
extends java.lang.Thread

A thread that continuously dequeues a VisitState from the queue of new visit states (those that still need a DNS resolution), resolves its host and puts it on the Workbench. The number of instances of this thread is configurable.

Note that only instances of this class manipulate the map from IP address hashes to workbench entries. The map needs to be updated with a get-and-set atomic operation, so synchronization is explicit.

Nested Class Summary

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

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

Field Summary

Fields

Modifier and Type	Field	Description
boolean	stop	Whether we should stop (used also to reduce the number of threads).

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor	Description
DNSThread(Frontier frontier, int index)	A DNS thread for the given Frontier, with an index used to set the thread's name.

Method Summary

Modifier and Type	Method	Description
void	run()

Methods inherited from class java.lang.Object

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

Methods inherited from class java.lang.Thread

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

Field Detail

stop

public volatile boolean stop

Whether we should stop (used also to reduce the number of threads).

Constructor Detail

DNSThread

public DNSThread(Frontier frontier,
                 int index)

A DNS thread for the given Frontier, with an index used to set the thread's name.

Parameters:

frontier - the frontier.

index - the index of this thread

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread