corrade-vassal – Rev 1
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/*
* CVS identifier:
*
* $Id: FacilityManager.java,v 1.12 2002/05/22 15:00:24 grosbois Exp $
*
* Class: MsgLoggerManager
*
* Description: Manages common facilities across threads
*
*
*
* COPYRIGHT:
*
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
*
* Copyright (c) 1999/2000 JJ2000 Partners.
* */
using System;
namespace CSJ2K.j2k.util
{
/// <summary> This class manages common facilities for multi-threaded
/// 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.
///
/// <p>Currently the only kind of facilities managed is MsgLogger.</p>
///
/// <P>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.
///
/// <P>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.
///
/// </summary>
/// <seealso cref="MsgLogger">
/// </seealso>
/// <seealso cref="StreamMsgLogger">
///
/// </seealso>
public class FacilityManager
{
/// <summary> 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.
///
/// </summary>
public static ProgressWatch ProgressWatch
{
get
{
ProgressWatch pw = (ProgressWatch) watchProgList[SupportClass.ThreadClass.Current()];
return (pw == null)?defWatchProg:pw;
}
}
/// <summary>The loggers associated to different threads </summary>
//UPGRADE_NOTE: Final was removed from the declaration of 'loggerList '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly System.Collections.Hashtable loggerList = System.Collections.Hashtable.Synchronized(new System.Collections.Hashtable());
/// <summary>The default logger, for threads that have none associated with them </summary>
private static MsgLogger defMsgLogger = new StreamMsgLogger(System.Console.OpenStandardOutput(), System.Console.OpenStandardError(), 78);
/// <summary>The ProgressWatch instance associated to different threads </summary>
//UPGRADE_NOTE: Final was removed from the declaration of 'watchProgList '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly System.Collections.Hashtable watchProgList = System.Collections.Hashtable.Synchronized(new System.Collections.Hashtable());
/// <summary>The default ProgressWatch for threads that have none
/// associated with them.
/// </summary>
private static ProgressWatch defWatchProg = null;
internal static void registerProgressWatch(SupportClass.ThreadClass t, ProgressWatch pw)
{
if (pw == null)
{
throw new System.NullReferenceException();
}
if (t == null)
{
defWatchProg = pw;
}
else
{
watchProgList[t] = pw;
}
}
/// <summary> 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.
///
/// </summary>
/// <param name="t">The thread to associate with 'ml'
///
/// </param>
/// <param name="ml">The MsgLogger to associate with therad ml
///
/// </param>
internal static void registerMsgLogger(SupportClass.ThreadClass t, MsgLogger ml)
{
if (ml == null)
{
throw new System.NullReferenceException();
}
if (t == null)
{
defMsgLogger = ml;
}
else
{
loggerList[t] = ml;
}
}
/// <summary> 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.
///
/// </summary>
/// <returns> The MsgLogger registerd for the current thread, or the
/// default one if there is none registered for it.
///
/// </returns>
public static MsgLogger getMsgLogger()
{
MsgLogger ml = (MsgLogger) loggerList[SupportClass.ThreadClass.Current()];
return (ml == null)?defMsgLogger:ml;
}
/// <summary> 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.
///
/// </summary>
/// <param name="t">The thread for which to return the MsgLogger
///
/// </param>
/// <returns> The MsgLogger registerd for the current thread, or the
/// default one if there is none registered for it.
///
/// </returns>
internal static MsgLogger getMsgLogger(SupportClass.ThreadClass t)
{
MsgLogger ml = (MsgLogger) loggerList[t];
return (ml == null)?defMsgLogger:ml;
}
}
}
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