Modelling a version based scenario

Hi,
In the IP process i am desgining, forcasting is done in monthly buckets for different key figures.Say if I am in month 3, i should be able to see month 1 and month 2 forecast non editable and month 3 onwards editable. The super users first do the forecast and once they are done the the cells should be locked for editing by them. However, a power user can change those numbers and once done by him it should be locked and the complete horizon should be saved with a specific version corresponding to that month and year.
Then the month 4-month 12 forecast should be open with the same numbers forecasted in the previous cycle available for editing and when these are saved they should be saved with the corresponding version.
How do i achieve this. Please advise
Thanks
Rashmi.
Edited by: Rashmi Vellampalli on Nov 5, 2008 11:59 PM

Hi Syam,
The forecasting is done in montly buckets and there are many users who do this.
After there are done with their forecasting there is one power user who will
validate the forecast and if satisfied will lock them for that month. For example
we are now in Nov and Nov cycle is going on (forcasting is done from current month upto
2 years in monthly buckets). Sometime in the last week of Nov the forecast need to be freezed and
the power user will have to lock it and the lock should only apply for Nov.
After this who ever logs in should only be able to edit from Dec onwards. Let me know
if this explains it clearly or you need more details
Thanks
Rashmi.

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I believe this to be the culprit but I am at a loss as to why.
<?xml version="1.0" encoding="UTF-8"?>
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META-INF\MANIFEST.MF
WEB-INF\lib\jnlp-servlet.jar
WEB-INF\lib\jardiff.jar
WEB-INF\lib\jnlp.jar
version.xml
*.jar
*.jnlp
*.html
This configuration spits out the famous "Missing version field from server....." that I have seen many times in this forum. The download servlet is getting executed because I am getting a log file generated every time. Debug is the only value that will put out a log. The log output looks like this:
JnlpDownloadServlet(3): Request: /totalvu/totalvu.jnlp
JnlpDownloadServlet(3): User-Agent: JNLP/1.5 javaws/1.5.0_06 (b05) J2SE/1.5.0_06
JnlpDownloadServlet(4): DownloadRequest[path=/totalvu.jnlp isPlatformRequest=false]
JnlpDownloadServlet(4): Basic Protocol lookup
JnlpDownloadServlet(4): JnlpResource: JnlpResource[WAR Path: /totalvu.jnlp lastModified=Mon Dec 05 11:17:46 EST 2005]]
JnlpDownloadServlet(3): Resource returned: /totalvu.jnlp
JnlpDownloadServlet(4): SupportQuery in Href: true
JnlpDownloadServlet(4): lastModified: 1133799466000 Mon Dec 05 11:17:46 EST 2005
JnlpDownloadServlet(3): Request: /totalvu/sunsignedjars.jnlp
JnlpDownloadServlet(3): User-Agent: JNLP/1.5 javaws/1.5.0_06 (b05) J2SE/1.5.0_06
JnlpDownloadServlet(4): DownloadRequest[path=/sunsignedjars.jnlp isPlatformRequest=false]
JnlpDownloadServlet(4): Basic Protocol lookup
JnlpDownloadServlet(4): JnlpResource: JnlpResource[WAR Path: /sunsignedjars.jnlp lastModified=Mon Dec 05 10:00:20 EST 2005]]
JnlpDownloadServlet(3): Resource returned: /sunsignedjars.jnlp
JnlpDownloadServlet(4): SupportQuery in Href: true
JnlpDownloadServlet(4): lastModified: 1133794820000 Mon Dec 05 10:00:20 EST 2005If I remove the version= tag from the main jnlp file, everything loads fine, but there is no versioning. I have also tried to remove the version.xml file from the package and change my jar files to use file based versioning, but that didn't work either. I rebuilt my jar files with the __V1.0 extension and the complaint was that it couldn't load the resource totalvu.jar. Well, ya, it is now named totalvu__V1.0.jar! Again, versioning is being ignored. The double underscore and V was not recognized as anything special.
The servlet is running long enough to spit out a log file, no errors. It looks like it succesfully processed the jnlp files, but there is no indication of any versioning.
Doe the jnlp.jar and jardiff.jar files need to be included in the lib folder in the .war file? I am only including the jnlp-servlet.jar. They were not referenced in the example war file in the documentation, but I have seen them referenced in older doc for other app servers. I did try including them, but it made no difference of course. Guess this question is just a housekeeping question.
Does anyone have any insight on this problem?
I am at the point where I think I would like to get the source and debug through it to see what is going on, but that should be unecessary.

Thanks. I had the same problem.
As danrak suggests, just add this to your web.xml file to parse .jar and/or .zip file extensions:
<servlet-mapping>
<servlet-name>JnlpDownloadServlet</servlet-name>
<url-pattern>*.zip</url-pattern>
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<servlet-mapping>
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Hi guys,
Are there known bugs in Sun's JnlpDownServlet? After installing the JNLP developer pack and configuring the directories in how Sun suggested in http://java.sun.com/products/javawebstart/docs/downloadservletguide.html (but using exploded directory structure instead of a WAR file since I am still in development), I keep getting "Missing version field in response from server when accessing resource: (http://localhost:8080/myApp/foo.jar, 1.1)" for <jar href="foo.jar" version="1.1"/> in foo.jnlp,
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My test app is a straight forward one.
Below are the jnlp and version.xml.
As long as the attribute [version="1.1"] is included I get the;
Missing version field in response from server when accessing resource: (http://localhost/Webstart/app/uitrij.jar, 1.1)
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launch.jnlp:
<?xml version="1.0" encoding="UTF-8"?>
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at com.sun.javaws.cache.DownloadProtocol.getDownloadSize(Unknown Source)
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at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
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at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
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Hi Marc,
My impression was that the JnlpDownloadServlet wasOh sorry. I did not recognize that you already used
the download servlet.Well, you were partially right I think :)
Problem is that I've been combining two test at the same time.
In one test I have all the files in a directory(-structure) on a (local) webserver.
This allows me to do the simple tests.
And then I create a .war and deploy that to a (local) application server (HP's Bluestone 7.3 in this case).
The versioning would only work when doing the app server test, as the 'standalone' test has no back-end to interpret the request for a version-specific file (jar), as you pointed out.
As the deployment using a .war file (still) doesn't seem to work because of the .getRealPath() problem (see http://developer.java.sun.com/developer/bugParade/bugs/4474021.html) I don't even get to versioning in that test.
So if I want versioning I have a couple of options I guess;
- Try the jar as provided by BEA as mentioned in
http://forum.java.sun.com/thread.jsp?forum=38&thread=176243
If this indeed works (haven't tried it yet), my guess is they 'fixed' the getRealPath() problem(s) themselves. (It doesn't seem like it's fixed in the current jnlpDownloadServlet )
- Set up the app server as a straight-forward servlet-runner to run the jnlpDownloadServlet without using the std deployment.
I'd prefer the 1st option to work, as I'd like to be able to deploy using a .WAR.
The latter would basically come down to what you called 'installing a helper'.
As far as I understand, you switch from basic to
version-based
download by adding the version="x.y" attribute to the
jar element.And add the version.xml which links the versions to actual files (jars), IIRC.
What happens next, complete download of the new
version or the download of a difference jar is up to the jnlpI'm not quite clear on when the diff is done and when a complete file/jar is downloaded, but that at the moment is a moot point for me :)
My guess is that you did not setup the servlet
properly or that it doesn't work for some other reason.Several reasons, as mentioned above :)
The only way to find out is to have a look at the HTTP
communication between jnlp client and servlet that happens during
your test.
Do you know how to do that?Well, one thing I've been trying to get to work is the logging of the jnlpDownloadServlet.
But even in DEBUG mode it doesn't really give me much information.
I've also got Webstart's logging on, but again the information in it's logfile is not really informative.
I've also used Sam Spade to see what responses I get from specific requests.
Hmm, just thought of something; I haven't looked at the logfile of the web-server yet.
Not that I think it'll help me much, but might be of interest to look at it all the same.
<aside>
Interestingly enough SamSpade gave me two different results when requesting the .jnlp file from the .WAR.
Using a HTTP 1.0 it gave me a 404
Using HTTP 1.1 it gave me the jnlp file.
</aside>
FWIW; I'm currently leaning towards phasing the implementation of Webstart.
1st as webserver based solution with only Basic versioning. (This works, that I know for sure :)
Later on as versioned-download using .WAR deployment.
Dave,
I don't have my web.xml here, but yes both .jnlp as /app/ are mapped to the jnlpDownloadServlet. That part of it works. (When doing the app server test that is; no servlet is used in the standalone test).
Anyway, thanks again for your comments.
If nothing else they at least made me get my thoughts a bit more straight :)
Anne.

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