Projet : java based discussion forum

hi all,
i am planning to build a project based upon JAVA.
the base concept is to build a java based discussion forum.
this is my first independent project so can anyone please suggest answers to following questions :
(1) how to start building a project.
(2) for text editor in my project should i use any existing editor or should i create editor on my own.
thanks
pratz

804658 wrote:
and for the editor related question may be i was not clear with the question.
actually i wanted to ask about the editor that the end user will use in my application to post his thought but ill appreciate if you could have asked me that for which editor i am asking the question instead of directly saying that i am not ready to build a project, that is really discouraging.Well, I'm just giving you honest feedback. If you don't even know how to start a project, then a discussion forum is probably a bit out of your reach.
As for your question about the editor. I assume you're creating a web based discussion forum? Then the "editor" would be just a regular HTML textbox (most likely) that the user would fill with his text.
But maybe you'll want to start with something smaller. For a discussion forum you'll need to know how to use databases, create web user interfaces and handle all sorts of other things. Do you know how to do those or did you think (like so many others here) that you'll just pick those up along the way?

Similar Messages

Data structure for web-based discussion forum

Hello all. I have begun work on a discussion board forum but have not yet decided upon a data structure for the hierarchy of messages to be left on a board. Any one have any thoughts or experience in this matter? My first thought was to implement a basic linked list in which every reply to a message would be a new child of a node. This would require I use recursion in some areas for counting and finding messages but I was also thinking that this way I can store each thread object in a simple fashion using serialization.
SJ

THE STANDARS DIRECTORY STRUCTURE IS :-
PROJECT FOLDER
|
|---------->WEB-INF
|------> web.xml file
|-------> classes (folder to keep java files)
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Java Discussion Forum - Post topic not working

I've deployed the Java Discussion Forum contributed by CLAURENT in Knowledge Exchange. Deployed to 10gAS in JDev 9051. I've modified a few deprecated classes and made the appropraite changes to orion-applications.xml to point to the correct JPDK jars when deployed under Linux.
The application is operating properly with no errors. The administartion portlet can modify and create new forums. However, Posting a topic does NOT work. And it doesn't throw any errors on screen or in the console log (application.log) or the log4j log (forumprovider.log). Has anyone run into a problem like this?
Thanks. LEH

I have exactly the same problem on the Portal 10g release 2.
Normally the "dit of a new topic" calls the EditPostAction but after submitting the form, nothing reachs this action.
I check this in debug mode and add several logs and I don't see nothing appearing for this action.
Did you find a solution?

JAVA Discussion Forum Portlet of craig Laurent

Hi all,
I downloaded the Java Discussion Forum portlet which is developed by laurent from Oracle Portal Integration Solutions site.
But I have some issues in using this portlet.
As per the instructions I have installed the portlet successfully in both OCS V1 and OCS V2.
1) But in OCS V1 when creating a Topic or reply to a Topic the record is creating with a TIMESTAMP of 3 Hrs less than the actual time. I understand he is using CURRENT_TIMESTAMP to capture the time. When I checked by create a record in a dummy table with capturing TIMESTAMP directly in SQL*PLUS, correct time is capturing without any difference. This is the problem I am facing with OCS V1.
2) In OCS V2 the problem I am facing is something tedious. When tried to create a Topic the record is not at all creating in the database, at the sametime no error message is also occuring.
Can anybody please...... help me to sorted out these issues.
Thanks & Regards,
Durai.

Hi,
I am also having a problem in using Java Discussion Forum Portlet. I have deployed the portlet successfully in OCS V2(Portal Version 9.0.2.3.0B). But when I am creating a topic it is not creating a record in the database. I can be able to create forum, but I couldn't create a topic and reply topic. Should I need to apply any Patch.
The same portlet which I deployed in OCS V1(Portal Version 9.0.2.2.22) is working fine.
Please Advice me
Regards,
Durai.

Is there a free java based forum that does NOT require disk write access ?

Hello,
I've been trying to set up mvnForum (www.mvnForum.com) on my site but I've had to give it up as the way the server is set up I can only give write access to Tomcat if I give write access to everyone !
I don't need my forum to have disk access as it can just use the mySQL database the whole time. So is there a good java based forum out there that does not require disk access ? I'm hoping to find one that has e-mail authentication for people who register and things like that.
I know a php forum that will do it already but as the rest of the site is written in jsp it would be nice to be able to integrate it properly. Any help greatly appreciated.

Please try mvnForum beta3, it doesnot require disk write. Since RC1 mvnForum use disk access to write Lucene search index and attachment file.
Regards,
Minh Nguyen
mvnForum Developer

Discussion Forum Portlet - Problems with JAVA and UTF8?

Hi
I installed the Discussion Forum Portlet successfully. It also seems that almost everything works fine. There's only a problem if I have new posts that include special German characters (Umlaute) like ä, ö, ü or special French characters like é, è or ç. They are saved correctly in the table but if you view the post the characters are not displayed correctly.
Example
input: ça va?
result: Ã§a va?
I know that there are problems with Java and UTF8 Database. Is there a possibility to change this (bug)?
Regards
Mark

Here's what I got. I don't see anything that helps but I'm kinda new to using SQL and java together.
D:\javatemp\viddb>java videodb
Problem with SQL java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver
] Syntax error in CREATE TABLE statement.
Driver Error Number-3551
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] Syntax error in
CREATE TABLE statement.
at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.execute(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.executeUpdate(Unknown Source)
at videodb.main(videodb.java:31)
D:\javatemp\viddb>

Integration of a Java-based forum into an existing webapp (Single Sign On)

Hi all,
This is my first post, so apologies if it's in the wrong place. I couldn't find a board that seemed to fit this topic.
I am looking to integrate a forum into my Java based (Tapestry) webapp. After a couple of hours googling around, i'm struggling to find something that would suit my needs so i've come looking for suggestions. It needs the following features:
- Can be deployed as part of a Tapestry based WAR
- Integrates with my existing member base, hence Single Sign On
- Rich feature set including moderation, avatars etc.
Can anyone point me in the right direction?
Cheers,
Ben.

Look for possible older Jive Software forum application servers. This is what the Sun forums are based on. It used to be free anyway.

Integrated Solutions Java Discussion Forum

Hi
Here's some feedback on the above portlet. We have installed the forum in a separate OC4J container on 10g. It installed without any problems and is working correctly through Portal apart from the following.
We are experiencing problems wth refreshing.
a. If you reply to a thread the reply is placed second last on the page. You have to exit and re-enter the portlet before the lastest thread is displayed at the bottom of the page.
b. Similar problem. Two users are accessing the forum. First user creates a new reply to a thread. The second user accesses the forum/topic and can see that the number of replies are correct but on accessing the thread cannot see the latest thread. They have to exit and re-enter the portlet before the new thread is viewable.
In general users of the discussion forum may find it useful if security on the Portlet was enhanced to allow security to be attached to Products to allow Products to be public to all users or private to a group of users. The search would also required to be amended to only bring back forum information that the user has access to.
Belinda Chisholm

Hi Belinda!
Thankx a lot for the comments, I appreciate.
I've filed enhancements request for all the suggestion you provided. The development team should consider them in future enhancements.

System freezes every time I use a Java based app

Hi all,
Very new to all this as I don't really know what to do, where to post or really how to ask about this.
It started out that I wanted to try to use JAlbum, a program that creates photo albums to share on the web etc..... I upgraded the Java app on my WinXP Pro (service packs and updates in place) to the newest version of Java. I even uninstalled all previous versions of Java, rebooted a couple of times and installed the newer version (j2re-1_4_2_10-windows-i586-p.exe).
I was instructed to install the JEdit free edit pad type app. The application went smoothly. When I exited the installer my system froze. When I rebooted and started up the .jar file all went well. I created a test file and saved it and then exited the program. System froze up. Started up JAlbum after rebooting, same thing. Program works right but then system freezes up and I have to do a hard reboot.
I work with 3D stuff all the time (Poser, DAZ Studio) as well as in Photoshop CS so my system is kept up to date for this reason alone. My system is considered very stable my geek friends and so this is very strange as this has NOT ever happened to me in the years I've been using WinXP Pro!!
Please let me know if there is anything you can suggest, besides reloading up Windows, that's not an option, that's the easy way out and with more thant a hundred programs on board that is not something I relish doing!
Thanks very much
System Specs:
Win XP Pro Edition (SP 1+) - P IV/2.0 Ghz
NVIDIA GeForce FX 5700LE - 250Mb's DDR RAM
Sony ViewSonic G810 monitor - 20" viewable screen
On board - 1 1/2 Gigs of DDR RAM
1 internal - 1 external Western Digital Hard Drives
1 internal Seagate Hard drive
Richard :-)

I was turned on to a thread here that seems to have some info.
http://forum.java.sun.com/thread.jspa?threadID=661574
I did update my Direct X that I'm embarrassed to admit was out of date. Still froze the system after the reboot trying to run a Java based app. So now I have tried the vaiable solution and set the nVidia video card options to Application Controlled and I'll see what happens.
I'm going to reboot, again and then run JAlbum and keep my fingers crossed. If that doesn't work then how do I implement the last posters suggestion?? Through the Run dialog (copy/paste and hit OK?)
Thanks much for your help!
Richard ;-)~

RE: Java-based Client for Forte/IIOP

We have deployed an application using JDK 1.1.6,
Swing 1.0.3, Visibroker 3.2, and Forte 3.0.G.2.
We are also using Forte's Java Interoperability
Service.
We have a closely-held client base (i.e. not a
million random yahoos off the internet), so we can
secure a Java port between client and server and
download a fairly significant client. The Java
client is deployed with Sun's JRE (to control the
environment) with the following configuration:
2.6 MB JRE
765 KB Forte.zip
2.0 MB swingall.jar
1.6 MB vbjtools.jar, vbjorb.jar
100 KB application classes
1) The Swing controls don't interoperate well
with the AWT and Symantec widgets, especially in
an internal frame. They paint slowly on top of
each other, move jerkily, and paint before moving
to the programmed coordinates so it looks silly.
100% Swing controls play well with other Swing
controls and are reasonably fast.
2) We used Symantec Cafe 2.5a to paint the
screens, and had some problems with the
setLayout(null) on things like the Swing tab
folder and split panel. Commenting out the line
fixed it, but I'm hoping Cafe 3.0 will fix it (I
have a person installing it but haven't gotten a
report...)
3) The initial search time to turn an IOR file
into a reference is an annoying 10 seconds, and
the first method call takes about 7 seconds, but
after that is less than a tenth of a second.
Haven't done any digging to find out why yet.
4) If we were deploying this as an applet, we
would probably use the IDL IIOP export--when using
the Java Interoperability service, any method call
seems to load the whole 765K across the
line...class by class. Ugly. IDL just gets what
it needs and is smaller.
5) Also, if deploying as an applet, we wouldn't
have to download the JRE or visibroker jar files,
and would only download the swing and Forte IDL
generated classes as needed, so it would be a much
smaller footprint than the 7MB above. (Note:
However, we would be at the mercy of the browser
being used by client.) Different strokes for
different folks...
-DFR
From: [email protected]
Date: Tue, 01 Dec 1998 15:15:18 -0800
Subject: RE: Java-based Client for Forte/IIOP
Sean,
My worry is that Swing, while eloquently designed,
represents an attempt to
write a totally new display system which, at least
in the case of my
project, will run on top of Windows. I really like
the Java (or a Java-like
i.e. J++) language, but I feel safer using the
native MS widgets. It does
not seem that anyone on this forum has used Swing
extensively and can
testify to its stability and performance.
Regards,
David
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>

We have deployed an application using JDK 1.1.6,
Swing 1.0.3, Visibroker 3.2, and Forte 3.0.G.2.
We are also using Forte's Java Interoperability
Service.
We have a closely-held client base (i.e. not a
million random yahoos off the internet), so we can
secure a Java port between client and server and
download a fairly significant client. The Java
client is deployed with Sun's JRE (to control the
environment) with the following configuration:
2.6 MB JRE
765 KB Forte.zip
2.0 MB swingall.jar
1.6 MB vbjtools.jar, vbjorb.jar
100 KB application classes
1) The Swing controls don't interoperate well
with the AWT and Symantec widgets, especially in
an internal frame. They paint slowly on top of
each other, move jerkily, and paint before moving
to the programmed coordinates so it looks silly.
100% Swing controls play well with other Swing
controls and are reasonably fast.
2) We used Symantec Cafe 2.5a to paint the
screens, and had some problems with the
setLayout(null) on things like the Swing tab
folder and split panel. Commenting out the line
fixed it, but I'm hoping Cafe 3.0 will fix it (I
have a person installing it but haven't gotten a
report...)
3) The initial search time to turn an IOR file
into a reference is an annoying 10 seconds, and
the first method call takes about 7 seconds, but
after that is less than a tenth of a second.
Haven't done any digging to find out why yet.
4) If we were deploying this as an applet, we
would probably use the IDL IIOP export--when using
the Java Interoperability service, any method call
seems to load the whole 765K across the
line...class by class. Ugly. IDL just gets what
it needs and is smaller.
5) Also, if deploying as an applet, we wouldn't
have to download the JRE or visibroker jar files,
and would only download the swing and Forte IDL
generated classes as needed, so it would be a much
smaller footprint than the 7MB above. (Note:
However, we would be at the mercy of the browser
being used by client.) Different strokes for
different folks...
-DFR
From: [email protected]
Date: Tue, 01 Dec 1998 15:15:18 -0800
Subject: RE: Java-based Client for Forte/IIOP
Sean,
My worry is that Swing, while eloquently designed,
represents an attempt to
write a totally new display system which, at least
in the case of my
project, will run on top of Windows. I really like
the Java (or a Java-like
i.e. J++) language, but I feel safer using the
native MS widgets. It does
not seem that anyone on this forum has used Swing
extensively and can
testify to its stability and performance.
Regards,
David
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>

[Integrated SOA Gateway] Publish Java based web service

Welcome!
Lately I have been trying to publish Java based web service through Integrated SOA Gateway. The documentation states that:
+"Custom interface definitions can be created for various interface types including custom interface definitions for XML Gateway Map, Business Event, PL/SQL, Concurrent Program, Business Service Object, Java (except for Java APIs for Forms subtype) and Composite Service for BPEL type."+ (Integrated SOA Gateway Developer's Guide Release 12.1, "Creating and Using Custom Integration Interfaces")
After familiarizing myself with $FND_TOP/bin/irep_parser.pl and $FND_TOP/bin/FNDLOAD tools, I have started coding my POJOs. Initially I have come up with three classes - request/response objects and service implementation. Service implementation has been annotated with "@rep:X" descriptors according to "Java Annotations" section of the documentation. While invoking $FND_TOP/bin/irep_parser.pl I have received errors about class resolution. My solution was to transform request and response types to static inner classes. This way I ended up with one *.java source file (see below).
* Sample ISG Service.
* @rep:scope public
* @rep:product AP
* @rep:displayname My Custom ISG Service.
public class MyService {
public static class Request {
private String id;
public void setId(String id) {
this.id = id;
public String getId() {
return id;
public static class Response {
private String data;
public void setData(String data) {
this.data = data;
public String getData() {
return data;
* Sample operation.
* @param request Request Object.
* @return Return Object.
* @rep:displayname Test operation.
* @rep:category BUSINESS_ENTITY SAMPLE_SERVICE
public MyService.Response testOperation(MyService.Request request) {
MyService.Response response = new MyService.Response();
response.setData("Some Data");
return response;
ILDT file has been successfully created and uploaded. However, I could not see the "Generate WSDL" button on Integrated Repository website. Is there any particular interface or superclass that my service implementation should extend? I have reviewed "PurchaseOrderSDO" example posted in the developer's guide (page 407), but I couldn't come up with a working solution. Could you provide me with more detailed tutorial/example? Which documentation sections should I read again?
After searching through forum, I have spotted $FND_TOP/bin/soagenerate.sh script, and thought that lack of "Generate WSDL" button was an EBS defect. After running the script, I have received an error:
Error in Service Generation.
ServiceGenerationError: Interface Type (JAVA) Interface SubType (null) is not supported.
oracle.apps.fnd.soa.util.SOAException: ServiceGenerationError: Interface Type (JAVA) Interface SubType (null) is not supported.
     at oracle.apps.fnd.soa.provider.wsdl.ArtifactsFactory.getArtifactsGenerator(ArtifactsFactory.java:55)
     at oracle.apps.fnd.soa.provider.wsdl.WSDLGenerator.generateServiceWSDL(WSDLGenerator.java:128)
     at oracle.apps.fnd.soa.provider.wsdl.ServiceGenerator.generateSOAService(ServiceGenerator.java:75)
     at oracle.apps.fnd.soa.provider.wsdl.ServiceGenerator.generateSingleService(ServiceGenerator.java:88)
     at oracle.apps.fnd.soa.provider.wsdl.ServiceGenerator.main(ServiceGenerator.java:419)
I would be grateful for any suggestions. Has anyone published Java based web service through ISG?
Best regards,
Lukasz

I tried the following as per Oracle support and able to generate the wsdl though, but not invoke the webservices.
1. Applied the patch 8607523
2. Took the translator.jar file from the patch 8857799 and replaced the current translator.jar file
3. Deploy the adapters.
$FND_TOP/bin/txkrun.pl -script=CfgOC4JApp -applicationname=pcapps
-oc4jpass=welcome -runautoconfig=No

Discussion Forum Portlet not working on standalone OC4J

Hi,
I'm testing the Discussion Forum Portlet.
I imported the portlet to jedeveloper in order to make changes to it.
I deployed it to a standalone OC4J (without doing any changes yet) and succesfully registered a provider, but when I put the portlet to a Portal-Page I get the following error:
"Unable to perform the operation: JBO-29000: Unexpected exception caught: oracle.jbo.JboException, msg=JBO-33001: Cannot find the configuration file config\common\bc4j.xcfg in the classpath"
Deploying to the OC4J_Portal Instance on the Application Server and
registering the provider with this URL is working.
I'm using Portal 10.1.2.0.2.
I tested with OC4J standalone versions 9.0.4.0.0 and 10.1.2.0.2.
What could cause the fact that the Portlet isn't working when it is deployed to an standalone OC4J?
Regards,
Mario

I'd recommend asking the Portal/Portlet people -- I think exposure to this sample will be required to give you any assistance.
One thing to be aware of though is that the libraries for BC4J (which this sample seems to use based on that error) aren't installed by default with OC4J standalone. Whereas for OracleAS 10.1.2 they are. So that might be something to chase down.
cheers
-steve-

Discussion Forum portlet

I get the following error after deploying the Discussion Forum portlet.
JBO-30003: The application pool (config.AppModule.AppModuleLocal) failed to checkout an application module due to the following exception:
HELP!

Following is the application log
10/20/03 1:49 PM forum: Servlet error
oracle.webdb.provider.v2.utils.soap.SOAPException: Can't read deployment propert
ies for service: dforum
at oracle.webdb.provider.v2.utils.soap.SOAPProcessor.locateService(Unkno
wn Source)
at oracle.webdb.provider.v2.adapter.SOAPServlet.doHTTPCall(Unknown Sourc
e)
at oracle.webdb.provider.v2.adapter.SOAPServlet.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for J2EE].server.http.
ResourceFilterChain.doFilter(ResourceFilterChain.java:59)
at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)
at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for J2EE].server.http.
ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:523)
at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for J2EE].server.http.
ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for J2EE].server.http.
HttpRequestHandler.processRequest(HttpRequestHandler.java:735)
at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for J2EE].server.http.
AJPRequestHandler.run(AJPRequestHandler.java:151)
at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for J2EE].util.ThreadP
oolThread.run(ThreadPoolThread.java:64)
10/20/03 3:30 PM forum: 9.0.2.0.0 Stopped
10/20/03 3:30 PM Stopped (Shutdown executed by jazn.com/admin from 127.0.0.1 (lo
calhost))

Embedding java based application in portal

hi ,
I want to embedd a java based application..Iam giving the pageURL in provider file..will it work r any problem..
i want to display that application as portlet.is mentioning page url is enough..that is tomcat..
Second way:if i copy all jsps and source files to htdocs and create a war file and ear file..will it works..
how to mention in provider.xml file to show this application in portal.
is there any specific way..
plz mail me
regards,

Our expirience with these types of applications is that you will need to integrate your jsp files (to some degree) into Oracle's jpdk framework, which essentially means some of the functionality of your jsp files may not work properly unless you switch to use many of JSP files with the JPDK api (i.e. custom tags and custom api calls so that the portal can render your application as a java portlet provider).
I think there is also a way that you can deploy your web application in oc4j and possibly use the web clipping portlet to show this java based application, however, I am not familiar with this, and you should probably ask Oracle Support for more information
Regards,
Jack
Check out Compoze Portlets for Oracle9iAS Portal v2.0 featuring portlets for discussion, chat, whiteboard and seamless integration with Domino / Exchange at http://www.compoze.com. Download them for a free trial!

Can I run a Java based app on an IPAD2 like JMRI Decoder-Pro?

I have an IPAD2 64GB Wi-Fi+3G. Can I run a JAVA based application known as JMRI Decoder-Pro? It is a Model Railroad suite of control applications that are JAVA based which provide online Train and alyout control via IPHONEs, Droids, Macs etc.

Hi,
I don't have an iPad.
You have posted in the iChat Forum Community.
iChat does not run on an iPad.
(ergo: I know nothing).
Try posting here (top level of iPad's area)
8:53 PM Thursday; June 16, 2011
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb( 10.6.7)
 Mac OS X (10.6.7),
"Limit the Logs to the Bits above Binary Images."  No, Seriously

Projet : java based discussion forum

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