Java Programming - Run Web Start App Through IDE Using Existing JNLP(s)

I apologize for the cross post. I believe I mis-posted the first time. The thread belongs here.
http://forums.sun.com/thread.jspa?threadID=5434826

You might try pointing JaNeLA *(<- link)* at it, and fixing any errors it reports. Ignore any optimisations suggested. The optimisations are not properly debugged and would not cause the kind of errors you report.
Oh, and a ++++ to that advice to to ensure the console pops open when encountering a web start app. Make sure the code is not [swallowing exceptions|http://pscode.org/javafaq.html#stacktrace] *(<- link)* at any stage.

Similar Messages

Pick Your Web Start App Of The Week

Hi,
I invite you to post your comments about your favorite Web Start app here.
Every week I will profile a different Web Start App at "The Saturn Times" - http://vamphq.com/times - including your quotes.
Post early, post often and help promote all the great Web Start apps out there.
- Gerald

Your jnlp checker Vanessa is quite useful.
Is the source available, because I would like to fix a bug or two I noticed.
Then check out Gentleware's Poseidon.
http://www.gentleware.com/download/Poseidon4umlJWS.jnlp
It is a commercial version of Tigris.org's ArgoUML, a free UML editor,
which is webstartable as well:
http://argouml.tigris.org/files/documents/4/0/0100/ArgoUMLWebStart.jnlp
Interesting about Poseidon was how they implemented key registration for their JWS app, a common task for commercial applications.
However Poseidon unwillingly illustrates limitations of the present JWS implementation - this beast is large (about 10-30 MB).
I loaded it at home via an ISDN link (8KB/s) and it took much time. The download was interrupted for several times, I hadn't start to download again from zero, because the app is splitted into several smaller jars, but still had to reload interrupted jars.
Some days later it turned out that the disk I had the JWS cache on got full. Thus I wanted to move my precious downloads to another partition, which is not possible. You can't move cache contents elsewere, so I had to redownload it again later (ouch).
An interesting bit about ArgoUML is how they speed up their large app by forcing class loading in a background thread. I saw that in their source and want to try out that technique myself soon, perhaps it gives a little speed advantage.
Regards,
Marc

Java Signing issues when loading web start app

Hey, not sure if this is the correct place for this - but couldn't think where else to put it...
I'm a bit stuck at the moment and i wondered if anyone could shed some light on my problem, and where I might go from here.
We've developed a EJB3 application that has a web start UI for users to start... The application is developed in Eclipse and compiled and deployed with ant build scripts... When we deploy the application from within Eclipse everything runs smoothly and users are able to start the web start app without any problems... However I've recently tried setting up a Continuous Integration server (Hudson) for us to test new deploys on and for this our build scripts need to be run outside of Eclipse...
This appears to run without a problem, however each time the system is deployed from here the web start application fails to start because web start cannot verify the signing in the client jar
Could not verify signing in resource: http://10.39.216.5:8080/mist2/lib/mist2-client.jarAs far as I can tell from the output of the build everything goes according to plan and there is little difference between the output if the build had been started in eclipse... The only big difference is that when building in Eclipse the build only packs up the compiled code, because Eclipse auto build the application, whereas in Hudson the code is clean built using the ant scripts (which are created by Eclipse)... and if I turn autobuild off eclipse and build the project from scratch using only the build scripts then the same problem arises...
I'm not really an expert on jar signing so I can't really guess at what might cause the verification to fail... any hints would be much appreciated. It feels like there is something that the Eclipse compiler does that is missing from the scripts but I can't think what this might be as the scripts are created in Eclipse
Thanks
Alex

Alex,
I believe your problem might be similar to one I had. According to one forum response (of course I can't find it now), if you have third-party JARs in your application (which in your case would be any eclipse jars), they might already be signed by their originators (as are eclipse jars), which may cause some really strange errors.
The solution for me was to package my third-party (that is, eclipse) jars into their own feature, separate from my application's feature. So, my main jnlp file has an extension to my application's feature jnlp, and that feature's jnlp file has an extension to yet another jnlp file containing the list of third-party (eclipse) jars. Of course, your jar list will probably be different than mine.
Here's all three files. Hope this helps!!
Calvin.jnlp (the main jnlp file):
<?xml version="1.0" encoding="UTF-8"?>
<jnlp
spec="1.0+"
codebase="http://bet/ERS"
href="calvin.jnlp">
<information>
<title>ERS</title>
<vendor>NIAT</vendor>
<homepage href="http://niat.net"/>
<description>Electronic Record System</description>
<icon href="icon.jpg"/>
<icon kind="splash" href="splash.jpg"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.6+" max-heap-size="256m"/>
<jar href="org.eclipse.equinox.launcher_1.0.101.R34x_v20080819.jar" main="true"/>
<extension
name="Calvin Feature"
href="features/net.niat.calvin.feature.jnlp"/>
<property
name="osgi.instance.area"
value="@user.home/Application Data/calvin"/>
<property
name="osgi.configuration.area"
value="@user.home/Application Data/calvin"/>
<property
name="eclipse.product"
value="net.niat.calvin.product"/>
</resources>
<application-desc main-class="org.eclipse.equinox.launcher.WebStartMain">
<argument>-nosplash</argument>
</application-desc>
</jnlp>
net.niat.calvin.feature.jnlp (the extension's jnlp):
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="http://bet/ERS">
<information>
<title>ERS</title>
<vendor>NIAT</vendor>
</information>
<resources>
<jar href="../plugins/net.niat.calvin_@[email protected]"/>
<extension name="RCP" href="org.eclipse.rcp_3.4.1.jnlp"/>
</resources>
<component-desc></component-desc>
</jnlp>
org.eclipse.rcp_3.4.1.jnlp (the repackaged eclipse files jar feature):
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="$$codebase">
<information>
<title>Eclipse</title>
<vendor>eclipse.org</vendor>
</information>
<resources>
<jar href="../plugins/org.eclipse.core.commands_3.4.0.I20080509-2000.jar"/>
<jar href="../plugins/net.niat.calvin_2.6.2.11.jar"/>
<jar href="../plugins/org.eclipse.core.commands_3.4.0.I20080509-2000.jar"/>
<jar href="../plugins/org.eclipse.core.contenttype_3.3.0.v20080604-1400.jar"/>
<jar href="../plugins/org.eclipse.core.databinding_1.1.1.M20080827-0800b.jar"/>
<jar href="../plugins/org.eclipse.core.expressions_3.4.0.v20080603-2000.jar"/>
<jar href="../plugins/org.eclipse.core.jobs_3.4.0.v20080512.jar"/>
<jar href="../plugins/org.eclipse.core.runtime.compatibility_3.2.0.v20071008.jar"/>
<jar href="../plugins/org.eclipse.core.runtime_3.4.0.v20080512.jar"/>
<jar href="../plugins/org.eclipse.equinox.app_1.1.0.v20080421-2006.jar"/>
<jar href="../plugins/org.eclipse.equinox.common_3.4.0.v20080421-2006.jar"/>
<jar href="../plugins/org.eclipse.equinox.preferences_3.2.201.R34x_v20080709.jar"/>
<jar href="../plugins/org.eclipse.equinox.registry_3.4.0.v20080516-0950.jar"/>
<jar href="../plugins/org.eclipse.help_3.3.101.v20080702_34x.jar"/>
<jar href="../plugins/org.eclipse.jface.databinding_1.2.1.M20080827-0800a.jar"/>
<jar href="../plugins/org.eclipse.jface_3.4.1.M20080827-2000.jar"/>
<jar href="../plugins/org.eclipse.osgi_3.4.2.R34x_v20080826-1230.jar"/>
<jar href="../plugins/org.eclipse.swt.win32.win32.x86.source_3.4.1.v3449c.jar"/>
<jar href="../plugins/org.eclipse.swt_3.4.1.v3449c.jar"/>
<jar href="../plugins/org.eclipse.ui.forms_3.3.101.v20080708_34x.jar"/>
<jar href="../plugins/org.eclipse.ui.workbench_3.4.1.M20080827-0800a.jar"/>
<jar href="../plugins/org.eclipse.ui_3.4.1.M20080910-0800.jar"/>
<jar href="../plugins/runtime_registry_compatibility.jar"/>
</resources>
<component-desc></component-desc>
</jnlp>

Java Web Start.app, apparent problems.

I have been experiencing many small problems during web browsing, etc. and have received terrific help from Barry Hemphill but he is unable to help on Java matters.
When I open Java Web Start app. I get the following message; "You cannot open Java Web Start.app because it it is damaged or incomplete". This is possibly, at least by the app's. name the cause of my troubles, though I am guessing. Can anyone guide me to where I can download and re-install the app. to see if it does overcome my problems. A typical one of them is happening as I type, the screen characters are lagging heavily behind my two-finger typing.
Brian Hope
MacMini Mac OS X (10.4.10)

Hi Brian, Happy Holidays!
The Java Web Start software is a component of the Java Runtime Environment (JRE) and is installed with the JRE.
http://java.com/en/download/faq/java_webstart.xml
See also...
http://www.digistamp.com/t3runMac.htm

How to change which programs run at start up

Hello,
I am just trying to speed up and clean up my machine. I would like to know how to control which programs run at start up. Also any other suggestions on how to keep everything running smoothly and effifiently. General maintenance type stuff.
Thanks, Jason

How to maintain a Mac
1. Make redundant backups, keeping at least one off site at all times. One backup is not enough. Don’t back up your backups; make them independent of each other. Don’t rely completely on any single backup method, such as Time Machine.
2. Keep your software up to date. In the Software Update preference pane, you can configure automatic notifications of updates to OS X and other Mac App Store products. Some third-party applications from other sources have a similar feature, if you don’t mind letting them phone home. Otherwise you have to check yourself on a regular basis. This is especially important for complex software that modifies the operating system, such as device drivers. Before installing any Apple update, you must check that all such modifications that you use are compatible.
3. Don't install crapware, such as “themes,” "haxies," “add-ons,” “toolbars,” “enhancers," “optimizers,” “accelerators,” “extenders,” “cleaners,” “defragmenters,” “firewalls,” "barriers," “guardians,” “defenders,” “protectors,” most “plugins,” commercial "virus scanners,” or "utilities." With very few exceptions, this kind of material is useless, or worse than useless.
The more actively promoted the product, the more likely it is to be garbage. The most extreme example is the “MacKeeper” scam.
The only software you should install is that which directly enables you to do the things you use a computer for — such as creating, communicating, and playing — and does not modify the way other software works. Never install any third-party software unless you know how to uninstall it.
The free anti-malware application ClamXav is not crap, and although it’s not routinely needed, it may be useful in some environments, such as a mixed Mac-Windows enterprise network.
4. Beware of trojans. A trojan is malicious software (“malware”) that the user is duped into installing voluntarily. Such attacks were rare on the Mac platform until recently, but are now increasingly common, and increasingly dangerous.
There is some built-in protection against downloading malware, but you can’t rely on it — the attackers are always at least one day ahead of the defense. You can’t rely on third-party protection either. What you can rely on is common-sense awareness — not paranoia, which only makes you more vulnerable.
Never install software from an untrustworthy or unknown source. If in doubt, do some research. Any website that prompts you to install a “codec” or “plugin” that comes from the same site, or an unknown site, is untrustworthy. Software with a corporate brand, such as Adobe Flash Player, must be acquired directly from the developer. No intermediary is acceptable, and don’t trust links unless you know how to parse them. Any file that is automatically downloaded from a web page without your having requested it should go straight into the Trash. A website that claims you have a “virus,” or that anything else is wrong with your computer, is rogue.
Because of recurring security issues in Java, it’s best to disable it in your web browsers, if it’s installed. Few websites have Java content nowadays, so you won’t be missing much. This action is mandatory if you’re running any version of OS X older than 10.6.8 with the latest Java update. Note: Java has nothing to do with JavaScript, despite the similar names. Don't install Java unless you're sure you need it. Most users don't.
5. Relax, don’t do it. Besides the above, no routine maintenance is necessary or beneficial for the vast majority of users; specifically not “cleaning caches,” “zapping the PRAM,” “rebuilding the directory,” “running periodic scripts,” “deleting log files,” “scanning for viruses,” or “repairing permissions.” Such measures are for solving problems as they arise, not for maintenance.
The very height of futility is running an expensive third-party application called “Disk Warrior” when nothing is wrong, or even when something is wrong and you have backups, which you must have. Disk Warrior is a data-salvage tool, not a maintenance tool, and you will never need it if your backups are adequate. Don’t waste money on it or anything like it.

How to call Web Start app from Web Start app?

Is there a way to call another Java Web Start Application from a running
Java Web Start Application, possibly from a different JNLP file?
Could this be done in a way that there won't be another virtual machine
launched; i. e. that the started Application will run in the same virtual
machine as the calling one?
Cheers,
Tobias

Im not sure about running in the same Jvm however there are two ways I know of to start another jnlp app. I am using this to essentially restart my application however, you dont have to do that and can start another web application by either using BasicService.showDocument with the jnlp file ( should start a webs tart app) or usign runtime exec with javaws and the jnlp as the argument.
    String jnlpUrlString = "commpartnersapp.jnlp?COMPANY="+COMPANY_ID;
    try {
      try {
        // Lookup the javax.jnlp.BasicService object
        //get the codebase
        //This will work on both Unix and Windows
        BasicService basicService = (BasicService) ServiceManager.lookup(
            "javax.jnlp.BasicService");
        URL codeBaseURL = basicService.getCodeBase();
        log.config("basicService.getCodeBase()=" + codeBaseURL.toString());
        basicService.showDocument(new URL(codeBaseURL, jnlpUrlString));
      catch (UnavailableServiceException ue) {
        //here for testing purposes since we are not started from jnlp in IDE
        log.log(Level.SEVERE,
                "ClientFrame:jMenuItemResetUserId_actionPerformed", ue);
        //when we are in the development environment
        String codeBaseString = "http://compub.cms/web/webportal/soft/";
        //Note this will work on windows only, javaws always in path
        //see http://java.sun.com/developer/community/chat/JavaLive/2005/jl0301.html
        //works on windows
        String execString = "javaws " + codeBaseString + jnlpUrlString;
        log.config("execString = " + execString);
        Process application = Runtime.getRuntime().exec(execString);
      catch (MalformedURLException ex) {
        log.log(Level.SEVERE,
                "ClientFrame:jMenuItemResetUserId_actionPerformed", ex);
    catch (IOException ex1) { //runtime exec throws IOException
      log.log(Level.SEVERE, "ClientFrame:jMenuItemResetUserId_actionPerformed", ex1);
    //pass a false param to not store profile at end of shutdown
    this.shutdown(0, false); //calls System.exit(0);R
S

My web start app doesn't get cached

Many apologies if this topic has been covered before but I have extensively searched the archive and can't seem to find it.
I have made my own trivial web start app and it downloads and works fine with my installed web start software. The problem I have is that when I launch the web start application manager and start my app from there the app does not apear in the "downloaded applications" section and hence I can't get to run it unless I have a connection.
Firstly I though I may be missing the <offline-allowed/> element from the JNLP file but it wasn't that. Then I thought it may be because my jars aren't signed but then the examples from sun worked OK and they weren't signed at all.
I have checked in the web starts cache directory and it looks to me as if the correct jars are in there but still the application manager won't show my app as one of the downloaded ones.
Any help would be much appreciated.
Gareth Walker

The Java Web Start application Manager will only display applications who's jnlp files are cached.
In order to cache your jnlp file you need to include an href attribute for the jnlp element in your jnlp
file. This may not allways be possible if your jnlp file is programatically generated by a servlet,
but it works for static jnlp files.

Is there any way to check another Java program running status?

HI. I want to write a Java program on hand-set but my program seems needs lots of resources and if there is another Java program running on the same hand-set simultaneously, my program will slow down. So, I want to check if there is another Java program is running on the hand-set, my program will show a message to user reminding user to close another program first.
Is there any way to do so?

On most recent devices, the application is not terminated but paused by using phone functions, and can be reactivated from the aplication management software. The javax.microedition.midlet package documentation is quite specific, if a tad obscure, about the MIDlet lifecycle and the role of the MIDelt methods vis-a-vis the AMS.
{color:#0000ff}http://java.sun.com/javame/reference/apis/jsr037/javax/microedition/midlet/package-summary.html{color}
Parenthetically, I've never been able to figure out how resumeApp should be used, nor have I seen this method invoked in any of the samples that come with the WTK, but I haven't gone through all of them.
I believe the still-in-progress MIDP3 will make it possible to have MIDlets that share the screen with native apps and which can be minimized and restored.
db

Passing a parameter to a Web start app

Hi, I'm having trouble getting a single integer value into my web start application. I understand how you do this with a JNLP however I need a different value for this integer depending on a PHP script. With applets it was fairly simple but with web start apps it seems a little more complex - the only way I could think of was to recreate the entire JNLP file via the PHP script which seems a bit cumbersome if all that's changing is a single integer.
I had a look around on the web for information about this but it seems that information on passing parameters to web start applications is few and far between.
I'd be very grateful for an answer!
Thanks.

alex.p wrote:
So in this case how would I pass the integer as a parameter to the webstart app. Is there no way of simply putting it in the link to the JNLP e.g ?
You could do that if you liked. Is there some expectation that the user will run the web start application after you do that? Or that the user won't already be running it? Or that the user will ever run it? I think you should back up and try to figure out what the point of this parameter is. Is it supposed to make something happen? Or are you just changing the application for the next time a user gets around to using it? Or what? As I said, this really doesn't make much sense so you need to provide a requirement that does make sense if you want to get anywhere at all.

Process name representation in a LINUX machine for a JAVA program running..

Hi,
We are using an Intel machine loaded with Red Hat Linux 7.2 OS to run JAVA programs. We have a requirement to calculate the CPU and MEMORY usage for each JAVA program running. Unfortunately when a java program is run say "java ESR" and we run a ps -ef | grep -i java, it is shown as hkumar 2847 2799 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2874 2847 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2875 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2876 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2877 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2878 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2879 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2880 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2881 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2882 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2883 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2884 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
hkumar 2885 2874 0 19:15 pts/3 00:00:00 /usr/java/jdk1.3.1_03/bin/i386/n
instead of the actual name of the program ie. ESR.
Does anybody know why this happens? Is there a way out to ensure that "ps -ef | grep java" gives the actual name of the java program being RUN?
Thanks in advance,
Harish

You have less chance to identify which programm that VM instance is running right now.
But you could (as we do) keep track of your programs if you save the process-id when you start the program.
We need this to shut down running java batch programs but you could find out the used system resources with this way as well...

How to execute unix command from the Java program running on Windows

Hello,
I need to
1. Execute a unix shell script from a Java program running on the Windows.
2. I also need to capture the output of this shell script in my program.
Please suggest me how to achieve this.
Thanks in Advance.

Hi...
Something is missing here
If you want to execute a shell script in windows that not posible unless you find or develop a unix shell script parser for windows.
But if you are trying the execute a unix shell script on a remote unix computer from your java program running on a windows platform you can do that by logging on to the UNIX terminal which is running on port 23 I think.
You can test this using telnet tool on windows
just type on command prompt
telnet <ip of the unix pc> <port number this case 23>
you should get the unix terminal. If that works you can do the same through java or you can directly conect to port 23 of that pc using sockets that way your program will be platform independant

Execute Unix command from Java program running on windows

Hello,
I need to write a java program that fetches file count in a particular unix machine directory. But java program will be running on windows machine.
The program should execute unix list command and fetch the output of that command.
Can anyone help me on this?
Thanks.

Hi there,
I had a similiar problem, though years ago. It was to have a java program execute any other. Lately, I've had to have a java program running on a unix machine execute a shell script. Entirely two different scenarios. I'm not sure what you will need for your app, but look into this:
Java Native Interface for executing C/C++ code.
C/C++ Code for launching the program you need to run.
java.lang.Runtime(?).exec(....)
With a combination of that stuff, you can make a launcher for any os that has Java running on it, and with Runtime, you can exec() pretty near any sort of unix shell or app command you'd like.
Good luck.
Tim

Make Java program run on other pc's

Good afternoon,
So I have this Java program compiling on my pc through NetBeans.
Now if I want this program to run on other pc's on its own (without NetBeans or any other program), preferably through a GUI, do I have to convert it to a JAR file? How does this exactly works out?
Thanks for your help.

alley wrote:
So I have this Java program compiling on my pc through NetBeans.And Netbeans does it using the JDK. it is always the JDK, no matter how many tools you wrap around it on top. You don't need Netbeans to run your stuff either, it is merely a development convenience that Netbeans provides you.
>
Now if I want this program to run on other pc's on its own (without NetBeans or any other program)Impossible - you need at least a compatible Java runtime.
, preferably through a GUIYou mean by double clicking on the program icon through the OS?
, do I have to convert it to a JAR file? That would be an easy way yes - an executable jar to be more precise
How does this exactly works out?Netbeans builds the jar automatically, just check out the folders of your project to find it. If you set a main class in the project properties, it is even an executable jar. Double click it and if the Java runtime is properly setup (which tends to be the case when it installs succesfully, but many people manage to screw it up in a way I can't imagine anyway), it will run.
For further guidance, check the online netbeans manual and research executable jars.

My java program runs fine even if i don't specify access specifier of class

Hi,
My java program runs fine even if i don't specify access specifier of class as public .
Then why do they say that atleast one class should be specified as public.
please help.

public access specifier is the default access
specifier
so if you dont give the access specifier before the
class name it is not wrong.I think that you are wrong. The default specifier is package or "package-private".
See here:
http://java.sun.com/docs/books/tutorial/java/javaOO/accesscontrol.html
Message was edited by:
petes1234

Possible to run web dynpro apps without a portal??

Hi
Is it possible to run Web dynpro apps on a WAS without a portal?
Thx

Ah,
Absolutely possible.
Use url like
http://host:port/webdynpro/dispatcher/com.your-company/yourappdc/AppName
in your browser address bar
Valery Silaev
SaM Solutions
http://www.sam-solutions.net

Java Programming - Run Web Start App Through IDE Using Existing JNLP(s)

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