getting the swordworld demo to run

emzic · April 24, 2006, 1:59pm

hello everyone!

first let me say, that i’m pretty excited about the sgs project and im looking forward to working with it! it’s pretty much what i have waited for so long to start developing a small morpg in java. great job jeff!

so far i’ve only tried out the pre-built demos and read through the api-docs. the tank game is great, kev!

i am currently doing the tutorial, but when i try to compile the sources for the server i get the following error in Player.java and Room.java

the piece of code

simTask.makeReference(this)

errors to
“The method makeReference(long) in the type SimTask is not applicable for the arguments (Room)”
unfortunately i dont know the SimTask class well enough to find out what the method is expecting.

other than that it compiles fine, and with a dirty workaround to these errors i even got the server to run.

however if i start the client the console says:


Found discovery stream of size: 353
Discovery Error: No games discovered!
Exception in thread "main" java.lang.NullPointerException
	at com.sun.gi.comm.users.client.impl.DefaultUserManagerPolicy.choose(DefaultUserManagerPolicy.java:125)
	at com.sun.gi.comm.users.client.impl.ClientConnectionManagerImpl.connect(ClientConnectionManagerImpl.java:201)
	at com.sun.gi.comm.users.client.impl.ClientConnectionManagerImpl.connect(ClientConnectionManagerImpl.java:194)
	at com.sun.gi.comm.users.client.impl.ClientConnectionManagerImpl.connect(ClientConnectionManagerImpl.java:175)
	at swordclient.connect(swordclient.java:86)
	at swordclient.<init>(swordclient.java:68)
	at swordclient.main(swordclient.java:217)

what does “no games discovered” mean? cant the client find the server?
since i dont know the swordworld game i dont really know what is supposed to be happening. what could i do in the swordworld? i guess i get some string back when i type “look” ?
i get an empty window with a command-line at the bottom.

thank you very much in advance for any help.

Jeff · April 24, 2006, 8:42pm

Hmm. I have a feeling this is a late change in the APi that didnt get back into the docs. We should add it to our new bug tracking system (Im about to post where that is, soon as I get all the existing bugs and RFEs into it.)

Where you see makeReference(…) in the sword world code replace it with
lookupReferenceFor(…)

Our next release will include the actual code files which we have compiled and assured correctness of.

Many apologies for the confusion.

JK

Jeff · April 24, 2006, 8:48pm

emzic:

however if i start the client the console says:
Found discovery stream of size: 353
Discovery Error: No games discovered!
what does “no games discovered” mean? cant the client find the server?

No game discovered means that the Discover XML document it read had no games listed.

This usually occurs right after startup of both the SGS server and the DiscoveryManager. It takes the current Discovery Manager about 90 seconds to collect all the info for a real Discover document.

There is also a known bug where once in awhile the DiscoveryManager “hiccups” and gives you an empty Discovery document again. If that happens then again waiting about 90 seconds should make it go away.

Are you using the DiscoveryManager or a fake discovery doc such as “FakeDiscovery.xml”? (You can tell by looking at the start of the client code where you initialize the CLientCommunicationManagerImpl. if its a url fo the from (“http:// …” then you are using real discovery. If ist of the form "file://… then you are set to use a local fake discovery file. Fake discovery is often used during development as it means you dont have to worry abotu running the DiscoveryManager at all.)

Correct. “look” should return some text describing the room and its contents.

emzic · April 25, 2006, 10:46am

thank you very much for your reply, Jeff!

yes i am using the FakeDiscovery.xml file here is what it looks like:

<?xml version="1.0" encoding="UTF-8"?>
<DISCOVERY>
    <GAME id="105" name="SwordServer">
        <USERMANAGER clientclass=
                "com.sun.gi.comm.users.client.impl.TCPIPUserManagerClient">
            <PARAMETER tag="host" value="127.0.0.1" />
            <PARAMETER tag="port" value="1110" />
        </USERMANAGER>
    </GAME>
</DISCOVERY>

and i started the server to listen on the port. here is the deploy.xml


<?xml version="1.0" encoding="UTF-8"?>
<GAMEAPP gamename="SwordServer">
    <GLEAPP bootclass="SwordWorldBoot"
	    classpathURL="file:swordserver.jar" />
    <USERMANAGER serverclass="com.sun.gi.comm.users.server.impl.TCPIPUserManager"
		reconnect_key_ttl="30">
	<PARAMETER tag="host" value="127.0.0.1" />
	<PARAMETER tag="port" value="1110" />
	<VALIDATOR moduleclass="com.sun.gi.comm.users.validation.impl.FlatFileUserValidator">
	    <PARAMETER tag="password_file_url" value="file:passwd.txt" />
	</VALIDATOR>
    </USERMANAGER>
</GAMEAPP>

the discovery manager is not running at all.
the server seems to start fine, here is the output:


25.04.2006 12:38:04 com.sun.gi.comm.users.server.impl.TCPIPUserManager init
INFO: Starting TCPIP User Manager on /127.0.0.1:1110
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.count 1
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.description
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.name SwordServer
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.id 105
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.count 1
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.0.clientClassName com.sun.gi.comm.users.client.impl.TCPIPUserManagerClient
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.0.params.count 2
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.0.params.keys.0 host
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.0.params.keys.1 port
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.0.params.values.0 127.0.0.1
._SGS_discover_UUID(1145961482281:-8052740510389241801).game.0.umgr.0.params.values.1 1110
Binary Size = 417

unfortunately the swordclient still tells me: Discovery Error: No games discovered!

Jeff · April 25, 2006, 6:08pm

is your FakeDiscovery.xml file in the workign directory you execute the client from?

emzic · April 26, 2006, 9:25am

thank you for your reply, jeff.

yes the FakeDiscovery.xml is definitely there, if it wouldnt be, i would get the error:

java.io.FileNotFoundException: FakeDiscovery.xml

i suspect the error to be in the URLDiscoverer class.

thanks!

Jeff · April 26, 2006, 9:16pm

Im fairly sure its your confuigration or others would be running into this.

Let me check something…

Edit: AHA This is your problem. Someoen in the group chnaged the name of the app in the server and discovery XML documents but DIDNT chnage it in the doc. Sorry Ill add it to the bugs list.

In the mean time you can fix it by changing the following line in SwordWorldClient:


mgr = new ClientConnectionManagerImpl("SwordWorld",
                                new URLDiscoverer(new URL(discoveryURL)));

to


mgr =
new ClientConnectionManagerImpl("SwordServer",
                                new URLDiscoverer(new URL(discoveryURL)));

emzic · April 27, 2006, 8:50am

yes! that was the problem. it works now!

thank you Jeff!

emerald · May 9, 2006, 5:17am

Hi,

I’m trying to run the entire server api and the client on my labtop but it doesnt seems to work. Would appreciate if someone can tell me the actual flow of executing the files. Thanks.

FYI: When i try to execute the SGS with the command: java -jar SunGameServer.jar

i have the following error:
E:\Program Files\Java\sgs-ea1>java -jar SunGameServer.jar
java.io.FileNotFoundException: SGS-apps.conf (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(Unknown Source)
at java.io.FileInputStream.(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at com.sun.gi.framework.install.impl.InstallationURL.(Installation
URL.java:103)
at com.sun.gi.SGS.(SGS.java:145)
at com.sun.gi.SGS.main(SGS.java:330)

but after i moved the file SGS-apps.conf from the etc folder into the same dir with the SunGameServer.jar other errors came up ???:
E:\Program Files\Java\sgs-ea1>java -jar SunGameServer.jar
java.io.FileNotFoundException: apps\chattest\deploy.xml (The system cannot find the path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(Unknown Source)
at java.io.FileInputStream.(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at com.sun.gi.framework.install.impl.URLDeploymentReader.getDeploymentRec(URLDeploymentReader.java:98)
at com.sun.gi.framework.install.impl.InstallationURL.(InstallationURL.java:115)
at com.sun.gi.SGS.(SGS.java:145)
at com.sun.gi.SGS.main(SGS.java:330)
… // same for other games apps

emerald · May 9, 2006, 5:47am

Hi,

i have resolved the issue. ;D

emerald · May 9, 2006, 8:04am

Hi,

I have edited the FakeDiscovery.xml, SGS-apps.confg & added the deploy.xml.

FakeDiscovery.xml
<?xml version="1.0" encoding="UTF-8"?>

SGS-apps.confg
101 file:apps/chattest/deploy.xml
105 file:apps/swordworld/deploy.xml

deploy.xml
[i]<?xml version="1.0" encoding="UTF-8"?>

<PARAMETER tag="host" value="127.0.0.1" />
<PARAMETER tag="port" value="2050" />

<VALIDATOR moduleclass="com.sun.gi.comm.users.validation.impl.FlatFileUserValidator">
    <PARAMETER tag="password_file_url" value="file:passwd.txt" />
</VALIDATOR>
</USERMANAGER>

[/i]

and change to mgr = new ClientConnectionManagerImpl(“SwordWorld”, new URLDiscoverer(new URL(discoveryURL))); in the SwordWorldClient.java as well as the lookupReferenceFor(this);

i got this error when executing the following

E:\Program Files\Java\sgs-ea1\release\server>java -jar SunGameServer.jar -I file:SGS-apps.conf
java.lang.ClassNotFoundException: com.sun.gi.apps.swordworld.SwordWorldBoot
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.sun.gi.logic.impl.SimulationImpl.(SimulationImpl.java:274)
at com.sun.gi.SGS.startupGame(SGS.java:240)
at com.sun.gi.SGS.(SGS.java:180)
at com.sun.gi.SGS.main(SGS.java:330)
java.lang.InstantiationException: com.sun.gi.apps.swordworld.SwordWorldBoot
at com.sun.gi.logic.impl.SimulationImpl.(SimulationImpl.java:312)
at com.sun.gi.SGS.startupGame(SGS.java:240)
at com.sun.gi.SGS.(SGS.java:180)
at com.sun.gi.SGS.main(SGS.java:330)
Booting comm test, appid = 101
May 9, 2006 3:45:47 PM com.sun.gi.comm.users.server.impl.TCPIPUserManager init
INFO: Starting TCPIP User Manager on /127.0.0.1:1150
._SGS_discover_UUID(1147160743769:1595996593697445082).game.count 1
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.description
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.name ChatTest
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.id 101
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.count 1
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.0.clientClass
Name com.sun.gi.comm.users.client.impl.TCPIPUserManagerClient
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.0.params.count 2
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.0.params.keys.0 host
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.0.params.keys.1 port
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.0.params.values.0 127.0.0.1
._SGS_discover_UUID(1147160743769:1595996593697445082).game.0.umgr.0.params.values.1 1150
Binary Size = 413

another error when evecuting the client:
Found discovery stream of size: 1785
Discovery Error: No games discovered!
Exception in thread “main” java.lang.NullPointerException
at com.sun.gi.comm.users.client.impl.DefaultUserManagerPolicy.choose(DefaultUserManagerPolicy.java:125)
at com.sun.gi.comm.users.client.impl.ClientConnectionManagerImpl.connect(ClientConnectionManagerImpl.java:201)
at com.sun.gi.comm.users.client.impl.ClientConnectionManagerImpl.connect(ClientConnectionManagerImpl.java:194)
at com.sun.gi.comm.users.client.impl.ClientConnectionManagerImpl.connect(ClientConnectionManagerImpl.java:175)
at com.sun.gi.apps.swordworld.client.SwordWorldClient.connect(SwordWorldClient.java:69)
at com.sun.gi.apps.swordworld.client.SwordWorldClient.(SwordWorldClient.java:46)
at com.sun.gi.apps.swordworld.client.SwordWorldClient.main(SwordWorldClient.java:146)

dont know what went wrong.

emerald · May 9, 2006, 1:51pm

hmm, i resolved the server’s error but still figuring out the client error.

emerald · May 9, 2006, 2:24pm

yipee! i’m so happy and excited. it’s working! cant wait to start developing other games… =)

Jeff · May 9, 2006, 10:44pm

Cool! Your fixing your own problems faster then I can pop up to help 8) Good job!

emerald · May 10, 2006, 3:33am

thanks.

emerald · June 1, 2006, 9:50am

I added a function(method) the Room.java and i encounter this error:

java.io.InvalidClassException: com.sun.gi.apps.swordworld.Room; local class incompatible: stream classdesc serialVersionUID = -1555555559452131670, local class serialVersionUID = 4045011986590506185
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:519)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at com.sun.gi.objectstore.tso.dataspace.DataSpaceTransactionImpl.deserialize(DataSpaceTransactionImpl.java:212)
at com.sun.gi.objectstore.tso.dataspace.DataSpaceTransactionImpl.read(DataSpaceTransactionImpl.java:196)
at com.sun.gi.objectstore.tso.TSOTransaction.lock(TSOTransaction.java:626)
at com.sun.gi.objectstore.tso.TSOTransaction.lock(TSOTransaction.java:356)
at com.sun.gi.logic.impl.GLOReferenceImpl.get(GLOReferenceImpl.java:133)
at com.sun.gi.apps.swordworld.SwordWorldBoot.userJoined(SwordWorldBoot.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sun.gi.logic.impl.SimTaskImpl.execute(SimTaskImpl.java:186)
at com.sun.gi.logic.impl.SimThreadImpl.run(SimThreadImpl.java:105)
New Player: UUID(1149154420788:-1786958821875615392)
java.lang.NullPointerException
at com.sun.gi.apps.swordworld.SwordWorldBoot.userJoined(SwordWorldBoot.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sun.gi.logic.impl.SimTaskImpl.execute(SimTaskImpl.java:186)
at com.sun.gi.logic.impl.SimThreadImpl.run(SimThreadImpl.java:105)

i understands that by “private static final long serialVersionUID = 1L;” we can edit the class without invalidating the copy that might already been stored in the objectStore.

in my case, i think the Room.java does not include the “private static final long serialVersionUID = 1L;”, that’s why is giving the above error.
is there a way to resolve it? can someone kindly advise?

Ragosch · June 1, 2006, 10:38am

The joys of serialization

Never change an already serialized class - subclass it instead!

Ragosch

emerald · June 1, 2006, 11:29am

:o haha. thanks.

abies · June 1, 2006, 9:07pm

Well, it is enough to put
private static final long serialVersionUID = -1555555559452131670L;
somewhere in your code.

Of course, you need to know exactly what kind of class modifications you are allowed to do without breaking data completly.

To be honest, if I’m using serialization, I’m just always putting serialVersionUID = 1; in class and stop caring about it. If I would ever need to make uncompatible change, I would change it to 2 etc - but you almost never want to make incompatible change if persisting something in serialized state, so you end up with explicit versioning or other ugly tricks. Look for example at DecimalFormat.readObject in JDK 6…

Jeff · June 2, 2006, 12:42am

I agree with abies.

But to fix your current problem, just clear the object store.

(Either rm -r persistant_data OR run the game sevre with the -C option.)