[Repast-developer] [ repast-Bugs-1252198 ] RepastConsole problems

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Bugs item #1252198, was opened at 2005-08-04 15:40
Message generated for change (Comment added) made by thowe
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Category: None
Group: None
>Status: Closed
>Resolution: Fixed
>Priority: 9
Submitted By: Reuben Grinberg (reubgr)
>Assigned to: Tom Howe (thowe)
Summary: RepastConsole problems

Initial Comment:
There are several serious problems with Repast Console.

First, because it uses PipedInputStreams and since 
System.out.println, System.err.println, etc... are blocking calls, 
the UI slows down considerably when there is a lot of output. The 
correct approach is to use a ByteArrayOutputStream instead.

Next, RepastConsole calls JTextArea.append from outside the 
Event Thread without using SwingUtilities.invokeAndWait, which 
is bad since Swing isn't thread safe.

Next, Error and Out are read in two different threads which leads 
to strange output of the following nature:

java.lang.NullPointerException
        at Society.build(Society.java:119)
        at net.sourceforge.indigosim.IndigoSociety.buildModel
Step 1
(IndigoSociety.java:56)
        at uchicago.src.sim.engine.SimpleModel.begin(Unknown 
Source)
        at uchicago.src.sim.engine.BaseController.beginModel
(Unknown Source)
Step 2
        at 
uchicago.src.sim.engine.AbstractGUIController.beginModel
(Unknown Source)

That is, the out and err become mixed in.

Finally, it's sort of disconcerting to have the output disappear from 
the real console when it's redirected to the RepastConsole.

I've fixed the problems I've mentioned here for my project, 
IndigoSim. I've put the relevant files here:
http://indigosim.sourceforge.net/files/CopyPrintStream.java
http://indigosim.sourceforge.net/files/IndigoConsole.java

IndigoSim is liscensed under the BSDL and it should be trivial to 
modify the files above for Repast.


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>Comment By: Tom Howe (thowe)
Date: 2005-08-05 09:10

Message:
Logged In: YES 
user_id=290820

Thanks for the bug notice and the code.  I have changed the
files in cvs.  The changes will be reflected in the
impending bug fix release.

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You can respond by visiting: 
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