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1  Java Game APIs & Engines / Java Sound & OpenAL / Re: windows crash to desktop on: 2004-08-25 19:59:37
Whatever was causing this is apparently resolved in 1.4.2_05 (or somewhere in between that and 1.4.1_05).  I released a new installer and the issue seems to have gone away.
2  Game Development / Networking & Multiplayer / Re: NIO - maximum socket connections on: 2004-08-25 19:54:41
Thanks for the information.  Any chance I can pay you directly for the relevant article so I don't have to buy the whole book.  I could send you the payment via paypal.  How about $10?

3  Game Development / Networking & Multiplayer / NIO - maximum socket connections on: 2004-08-17 13:42:40
How can you tell the maximum number of TCP/IP connections a single process and/or machine can maintain?

The answer is probably OS dependent, so I'd be curious about any info on Mac OS X, Linux and Windows XP.

Basically I'm trying to understand for planning purposes how many clients a single server could support at the same time.  

My game server is written in NIO and clients poll it every so often for updates (the nature of the game doesn't require instantaneous response).  However, for an upcoming game I would like to see if a constant connection would work - in which case the question of how many simultaneous connections can be supported is important.

Any insight would be appreciated - especially real world experience.  How do games like everquest work?  Are there X servers per N players?


4  Java Game APIs & Engines / Java Sound & OpenAL / windows crash to desktop on: 2004-07-05 00:08:26
Some users are reporting a crash to desktop as shown in the following hs_err stack trace.

This is using JDK 1.4.1_05 on Windows XP.  Any ideas what might cause this - has this been resolved in 1.4.2?  This is an intermittent issue and we haven't yet been able to create a reproducable case.



An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D2C15BB
Library=C:\Program Files\ddpoker\jre\bin\jsound.dll

NOTE: We are unable to locate the function name symbol for the error
      just occurred. Please refer to release documentation for possible
      reason and solutions.

Current Java thread:
      at Method)
      at Source)

Dynamic libraries:
0x00400000 - 0x00455000       C:\Program Files\ddpoker\poker.exe
0x77F50000 - 0x77FF7000       C:\WINDOWS\System32\ntdll.dll
0x77E60000 - 0x77F46000       C:\WINDOWS\system32\kernel32.dll
0x77DD0000 - 0x77E5D000       C:\WINDOWS\system32\ADVAPI32.dll
0x78000000 - 0x78087000       C:\WINDOWS\system32\RPCRT4.dll
0x77D40000 - 0x77DCC000       C:\WINDOWS\system32\USER32.dll
0x7E090000 - 0x7E0D1000       C:\WINDOWS\system32\GDI32.dll
0x77C00000 - 0x77C07000       C:\WINDOWS\system32\VERSION.dll
0x6D340000 - 0x6D46C000       c:\program files\ddpoker\jre\bin\client\jvm.dll
0x76B40000 - 0x76B6C000       C:\WINDOWS\System32\WINMM.dll
0x77C10000 - 0x77C63000       C:\WINDOWS\system32\MSVCRT.dll
0x6D1E0000 - 0x6D1E7000       c:\program files\ddpoker\jre\bin\hpi.dll
0x6D310000 - 0x6D31E000       c:\program files\ddpoker\jre\bin\verify.dll
0x6D220000 - 0x6D239000       c:\program files\ddpoker\jre\bin\java.dll
0x6D330000 - 0x6D33D000       c:\program files\ddpoker\jre\bin\zip.dll
0x10000000 - 0x10012000       C:\Program Files\ddpoker\DDClassLoader.dll
0x6D000000 - 0x6D106000       C:\Program Files\ddpoker\jre\bin\awt.dll
0x73000000 - 0x73023000       C:\WINDOWS\System32\WINSPOOL.DRV
0x76390000 - 0x763AC000       C:\WINDOWS\System32\IMM32.dll
0x771B0000 - 0x772D4000       C:\WINDOWS\system32\ole32.dll
0x6D190000 - 0x6D1E0000       C:\Program Files\ddpoker\jre\bin\fontmanager.dll
0x10100000 - 0x1010E000       C:\Program Files\Logitech\SetPoint\KEMHook.dll
0x74720000 - 0x74764000       C:\WINDOWS\System32\MSCTF.dll
0x0DBF0000 - 0x0DC00000       C:\WINDOWS\System32\tabhook.dll
0x10200000 - 0x10215000       C:\Program Files\Logitech\SetPoint\lgscroll.dll
0x6D290000 - 0x6D2AE000       C:\Program Files\ddpoker\jre\bin\jpeg.dll
0x6D110000 - 0x6D133000       C:\Program Files\ddpoker\jre\bin\cmm.dll
0x0D9A0000 - 0x0D9B0000       C:\WINDOWS\System32\ctagent.dll
0x605D0000 - 0x605D8000       C:\WINDOWS\System32\mslbui.dll
0x77120000 - 0x771AB000       C:\WINDOWS\system32\OLEAUT32.DLL
0x6D140000 - 0x6D162000       C:\Program Files\ddpoker\jre\bin\dcpr.dll
0x6D2E0000 - 0x6D2EE000       C:\Program Files\ddpoker\jre\bin\net.dll
0x71AD0000 - 0x71AD8000       C:\WINDOWS\System32\WSOCK32.dll
0x71AB0000 - 0x71AC4000       C:\WINDOWS\System32\WS2_32.dll
0x71AA0000 - 0x71AA8000       C:\WINDOWS\System32\WS2HELP.dll
0x6D2F0000 - 0x6D2F8000       C:\Program Files\ddpoker\jre\bin\nio.dll
0x6D2B0000 - 0x6D2D1000       C:\Program Files\ddpoker\jre\bin\jsound.dll
0x72D20000 - 0x72D29000       C:\WINDOWS\System32\wdmaud.drv
0x72D10000 - 0x72D18000       C:\WINDOWS\System32\msacm32.drv
0x77BE0000 - 0x77BF4000       C:\WINDOWS\System32\MSACM32.dll
0x77BD0000 - 0x77BD7000       C:\WINDOWS\System32\midimap.dll
0x76C90000 - 0x76CB2000       C:\WINDOWS\system32\imagehlp.dll
0x6D510000 - 0x6D58D000       C:\WINDOWS\system32\DBGHELP.dll
0x76BF0000 - 0x76BFB000       C:\WINDOWS\System32\PSAPI.DLL

Local Time = Sun Jul 04 00:58:28 2004
Elapsed Time = 14648
# The exception above was detected in native code outside the VM
# Java VM: Java HotSpot(TM) Client VM (1.4.1_05-b01 mixed mode)
5  Games Center / Java Technology Game Development Contest - 2004 / Re: Is it over?  'cuz our game hasn't been pl on: 2004-06-29 02:39:11
Our 2 submissions have not been played yet.  We just submitted to the contest and are hoping they will actually get played then considering the $50 entry fee  Smiley

We also have potential issues with firewalls for activating the game (which could be preventing the testing) but we have a resolution waiting for any judge that asks.  Of course, when asked for our activation numbers we advised Sun of this potential problem and that we had an easy solution.
6  Games Center / Java Technology Game Development Contest - 2004 / Re: Contest closed NOW? on: 2004-06-28 15:40:53
I thought our games had a good chance of placing - after all they are fun, polished and great games.  Of course, they are not 3D, so that may be a knock against them.

However, as far as I can tell, they have not yet been installed and played (I can track this because activation requires a quick connection to my server).  Given that they have to announce the winner this week, I am quickly losing hope that they will be judged.  It's a shame, but there isn't much one can do about it.  If Sun does another contest, hopefully they can allocate more time and craft a better submission system.

Our games are at
7  Games Center / Java Technology Game Development Contest - 2004 / Re: Contest closed NOW? on: 2004-06-18 11:52:48
I doubt they will announce today.  They only asked me for my activation keys on the 14th and as of this morning, none have been used.  So my two game entries have not been evaluated by any of the judges as far as I can tell.
8  Discussions / General Discussions / Re: Open sourcing Java and its effect in games on: 2004-06-05 13:50:23
Seems to me it works for linux which is arguably more complex than a jvm.
9  Games Center / Java Technology Game Development Contest - 2004 / Re: Entries already posted on: 2004-05-27 18:58:06
Well since I don't own star-office, can't read your submission.  HTML or TXT is more universal and free and works on Macs too.

I didn't even now what that file extension was until I hunted it down on the web.   Wink
10  Games Center / Java Technology Game Development Contest - 2004 / Re: Submitting the game on: 2004-05-27 16:51:48

Thanks much for the reply!

11  Games Center / Java Technology Game Development Contest - 2004 / Re: Submitting the game on: 2004-05-27 00:15:38
Does anyone from Sun have an answer to this?  A reply would be appreciated.

12  Games Center / Java Technology Game Development Contest - 2004 / Re: Submitting the game on: 2004-05-25 20:34:43
The rules are not written clearly at all.  Nor are the instructions for submitting the game.  In fact, I never received any instructions - I hunted around until I found some folder with my name on it and guessed that is where things go.  And then we find out that it is insecure.

There is no way I would enter this contest if it gave Sun the right to distribute my game to anyone it pleased.  It can use it all it wants for publicity, because that also benefits me.  It wound't make sense for Sun to do this anyhow because it would eliminate some of the best possible entries - commercially viable games.

I would also rather have the full version judged.  For example, in the demo version of War! Age of Imperialism, online play is disabled and games are limited to 7 turns.  In the poker game, you are limited to 20 hands of hold'em.  I certainly don't think of it as a "bribe" to "give" 5 full versions for judging.

Sun must have an answer to this.  I would be happy with an OK to my current solution:  have Sun send me an email when ready to judge and I'll respond with the location of the installers and license keys.  Simple enough and no need for them to add a security layer to the file/folder area of the contest submission section.
13  Games Center / Java Technology Game Development Contest - 2004 / Re: Submitting the game on: 2004-05-25 18:23:37
I really DID READ the rules.  I even read the rules clarification posted in this very forum:

Q. Do you give up rights to your game to Sun Microsystems?
A. No.  You do not give up your rights to your game to Sun Microsystems.  The reason we are not allowing source code to be submitted is to protect the author's work.  Sun Microsystems has the right to use any submission for advertising and promotion, but does not own the game nor the right to distribute or own it.

They may link to my site, with information about the game, but I certainly am not giving them the right to distribute full versions.

This game has not been "years in the making" either. It has been in the works for 5 months.  It doesn't really matter since the intent of the contest was not to see who could build the best game in 3 months.  The intent is to "further encourage great game development and continue to grow the adoption of the Java technology...".  It takes more than 3 months to build a solid game anyhow.  If Sun is truly interested in showcasing Java for building real games, then they of course want those games in-the-works before the contest was announced.  They should also want games that are highly polished and ready for prime-time.  A half-done game implemented in two months isn't going to have a lot of weight with commercial game developers.

If I have to upload demo versions, I will.  The judges will also have the opportunity to email me for full versions with activation numbers.  Keeping them private is only prudent from a business standpoint.
14  Games Center / Java Technology Game Development Contest - 2004 / Re: Submitting the game on: 2004-05-25 16:17:20
Well isn't this interesting.  I guess the judges will just have to email me for the download page and activation numbers.  Since I develop games for a living (as an independent not affiliated with any of the "no-no" publishers), I don't want activation numbers floating around the internet.

I find Java great for developing my games - able to release on Mac, Windows and Linux with relatively little extra work.  I hope I can enter these games for Sun to judge.

Some one from Sun must have read this thread by now.  How about a response Chris or Athomas?
15  Games Center / Java Technology Game Development Contest - 2004 / Re: Submitting the game on: 2004-05-22 11:18:10
Okay, lets test this.  You appear to be a member of the games contest project.  Can you tell me what is in my folder (jddonohoe)?  I have looked in a bunch of folders and have not seen any other submissions.

Would still like to get an answer from Sun on this.
16  Games Center / Java Technology Game Development Contest - 2004 / Submitting the game on: 2004-05-21 20:32:58
Some questions regarding game sumission which I haven't seen asked elsewhere.

First, is it sufficient to submit a URL to a download page for the installers?  This is easier for me because I have Win/Mac installers and they are large (10-30m).

Second, my games require activation numbers because they are available for sale.  If I post 5 numbers for the judges in my contest folder, are the judges the only other persons who have access to it?  I trying to avoid having these numbers being posted all over the internet.

-Doug Donohoe (jddonohoe entry)
17  Games Center / Archived Projects / Re: War! Age of Imperialism preview on: 2003-08-25 12:40:46
Thank you.

No plans to do anything mobile - this game wouldn't translate well to mobile due to the size of the map and types of things you have to do.

18  Games Center / Archived Projects / War! Age of Imperialism preview on: 2003-08-23 19:48:52
The reviewed War! Age of Imperialism, the computer version of the popular board game by Eagle Games.

War! is written entirely in Java (1.4.1) and will be availble in September for Mac and PC.

The review is at

More information on the game can be found at
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