org.w3c.www.protocol.http.cache
Class CacheSweeper

java.lang.Object
  java.lang.Thread
      org.w3c.www.protocol.http.cache.CacheSweeper

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

SimpleCacheSweeper

public abstract class CacheSweeper
extends java.lang.Thread

Nested Class Summary

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

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

Field Summary

protected static int	STATE_CLEAN_GENERATIONS
protected static int	STATE_CLEAN_STORED
protected static int	STATE_FORCE_CLEAN_GENERATIONS
protected static int	STATE_FORCE_CLEAN_STORED

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

CacheSweeper()

Method Summary

protected abstract long	collectCached(CacheGeneration generation, long bytes, boolean check) collect the existing resources
protected abstract long	collectCached(long bytes, boolean check) collect the existing resources
protected abstract void	collectStored() collect the still stored resources (disk) in the whole cache
protected abstract void	collectStored(CacheGeneration generation) collect the still stored resources (disk)
abstract void	initialize(CacheFilter filter) initialize the sweeper
protected abstract void	setState(int state) change the state of the Sweeper
abstract void	signal() Used to trigger a signal

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, run, 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

STATE_CLEAN_STORED

protected static final int STATE_CLEAN_STORED

See Also:

Constant Field Values

STATE_FORCE_CLEAN_STORED

protected static final int STATE_FORCE_CLEAN_STORED

See Also:

Constant Field Values

STATE_CLEAN_GENERATIONS

protected static final int STATE_CLEAN_GENERATIONS

See Also:

Constant Field Values

STATE_FORCE_CLEAN_GENERATIONS

protected static final int STATE_FORCE_CLEAN_GENERATIONS

See Also:

Constant Field Values

Constructor Detail

CacheSweeper

public CacheSweeper()

Method Detail

signal

public abstract void signal()

Used to trigger a signal

setState

protected abstract void setState(int state)

change the state of the Sweeper

Parameters:

an - integer, setting the new cache state

collectStored

protected abstract void collectStored(CacheGeneration generation)

collect the still stored resources (disk)

Parameters:

generation, - the CacheGeneration to clean

collectStored

protected abstract void collectStored()

collect the still stored resources (disk) in the whole cache

collectCached

protected abstract long collectCached(CacheGeneration generation,
                                      long bytes,
                                      boolean check)

collect the existing resources

Parameters:

generation, - the CacheGeneration to clean

bytes, - a long. The number of bytes to collect

check, - a boolean. If true, then only the stale resources will be removed

Returns:

a long, the number of collected bytes

collectCached

protected abstract long collectCached(long bytes,
                                      boolean check)

collect the existing resources

Parameters:

bytes, - a long. The number of bytes to collect

check, - a boolean. If true, then only the stale resources will be removed

Returns:

a long, the number of collected bytes

initialize

public abstract void initialize(CacheFilter filter)

initialize the sweeper