org.apache.manifoldcf.crawler.system
Class SetPriorityThread

java.lang.Object
  java.lang.Thread
      org.apache.manifoldcf.crawler.system.SetPriorityThread

All Implemented Interfaces:

java.lang.Runnable

public class SetPriorityThread
extends java.lang.Thread

This class describes a thread whose job it is to continuously reset document priorities, based on recent queuing activity. The goal is to evenly distribute queued documents across jobs and within classes of documents inside jobs. The way it works is for the thread to do some number of pending documents at a time. The documents are fetched in such a way as to get the ones that have been least recently assessed preferentially. The assessment process involves getting hold of a connector for the job that owns the document, and calculating the priority based on the recent history as maintained in the queueTracker object.

Nested Class Summary

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

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

Field Summary

static java.lang.String	_rcsid
protected BlockingDocuments	blockingDocuments
protected int	cycleCount
protected QueueTracker	queueTracker

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

SetPriorityThread(QueueTracker qt, int workerThreadCount, BlockingDocuments blockingDocuments)
Constructor.

Method Summary

void

run()

Methods inherited from class java.lang.Thread

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

Methods inherited from class java.lang.Object

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

Field Detail

_rcsid

public static final java.lang.String _rcsid

See Also:

Constant Field Values

queueTracker

protected QueueTracker queueTracker

cycleCount

protected int cycleCount

blockingDocuments

protected BlockingDocuments blockingDocuments

Constructor Detail

SetPriorityThread

public SetPriorityThread(QueueTracker qt,
                         int workerThreadCount,
                         BlockingDocuments blockingDocuments)
                  throws ManifoldCFException

Constructor.

Parameters:

qt - is the queue tracker object.

Throws:

ManifoldCFException

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread