jj2000.j2k.util

Class FacilityManager

java.lang.Object

jj2000.j2k.util.FacilityManager

public class FacilityManager
extends Object

This class manages common facilities for mutithreading environments, It can register different facilities for each thread, and also a default one, so that they can be referred by static methods, while possibly having different ones for different threads. Also a default facility exists that is used for threads for which no particular facility has been registerd registered.

Currently the only kind of facilities managed is MsgLogger.

An example use of this class is if 2 instances of a decoder are running in different threads and the messages of the 2 instances should be separated.

The default MsgLogger is a StreamMsgLogger that uses System.out as the 'out' stream and System.err as the 'err' stream, and a line width of 78. This can be changed using the registerMsgLogger() method.

See Also:

MsgLogger, StreamMsgLogger

Field Summary

Fields

Modifier and Type	Field and Description
private static MsgLogger	defMsgLogger The default logger, for threads that have none associated with them
private static ProgressWatch	defWatchProg The default ProgressWatch for threads that have none associated with them.
private static Hashtable	loggerList The loggers associated to different threads
private static Hashtable	watchProgList The ProgressWatch instance associated to different threads

Constructor Summary

Constructors

Constructor and Description
FacilityManager()

Method Summary

Modifier and Type	Method and Description
static MsgLogger	getMsgLogger() Returns the MsgLogger registered with the current thread (the thread that calls this method).
static MsgLogger	getMsgLogger(Thread t) Returns the MsgLogger registered with the thread 't' (the thread that calls this method).
static ProgressWatch	getProgressWatch() Returns the ProgressWatch instance registered with the current thread (the thread that calls this method).
static void	registerMsgLogger(Thread t, MsgLogger ml) Registers the MsgLogger 'ml' as the logging facility of the thread 't'.
static void	registerProgressWatch(Thread t, ProgressWatch pw)

Methods inherited from class java.lang.Object

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

Field Detail

loggerList

private static final Hashtable loggerList

The loggers associated to different threads

defMsgLogger

private static MsgLogger defMsgLogger

The default logger, for threads that have none associated with them

watchProgList

private static final Hashtable watchProgList

The ProgressWatch instance associated to different threads

defWatchProg

private static ProgressWatch defWatchProg

The default ProgressWatch for threads that have none associated with them.

Constructor Detail

FacilityManager

public FacilityManager()

Method Detail

registerProgressWatch

public static void registerProgressWatch(Thread t,
                                         ProgressWatch pw)

getProgressWatch

public static ProgressWatch getProgressWatch()

Returns the ProgressWatch instance registered with the current thread (the thread that calls this method). If the current thread has no registered ProgressWatch, then the default one is used.

registerMsgLogger

public static void registerMsgLogger(Thread t,
                                     MsgLogger ml)

Registers the MsgLogger 'ml' as the logging facility of the thread 't'. If any other logging facility was registered with the thread 't' it is overriden by 'ml'. If 't' is null then 'ml' is taken as the default message logger that is used for threads that have no MsgLogger registered.

Parameters:

t - The thread to associate with 'ml'

ml - The MsgLogger to associate with therad ml

getMsgLogger

public static MsgLogger getMsgLogger()

Returns the MsgLogger registered with the current thread (the thread that calls this method). If the current thread has no registered MsgLogger then the default message logger is returned.

Returns:

The MsgLogger registerd for the current thread, or the default one if there is none registered for it.

getMsgLogger

public static MsgLogger getMsgLogger(Thread t)

Returns the MsgLogger registered with the thread 't' (the thread that calls this method). If the thread 't' has no registered MsgLogger then the default message logger is returned.

Parameters:

t - The thread for which to return the MsgLogger

Returns:

The MsgLogger registerd for the current thread, or the default one if there is none registered for it.