Different Java environment/version per site

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In our corporate environment Java is really beloved. But suppliers love different java versions. Installing Java versions side by side is no issue; and in case of desktop application we can manage it.
But how can we assign different java version to different web applications?

Posted 3-Jul-13 22:00pm

Zoltán Zörgő

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Prasad Khandekar · Answer 1 · 2013-07-03T22:24:00

Solution 1

Hello Zoltan,

For web applications you need to change the environment of the application server. For application servers such as Websphere, Weblogic, it means running different versions (most of then comes bundled with the JRE version, changing it is a pain) and host applications in respective instance.

BTW why your web applications require different versions. JDK versions are backward compatible and a class compiled in earlier lower version of Java runs just fine in latest higher version.

Regards,

Posted 3-Jul-13 22:24pm

Prasad Khandekar

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Zoltán Zörgő 4-Jul-13 4:33am

Thank you, but the problem is not on the server side, but on client side. These run on different servers. One application requires on client side 1.6.0.18, an other 1.6.0.31, an other 1.7. They should be backward compatible, but they are not. If we install 1.7, the one requiring 1.6.0.18 is complaining about no java at all. But there are other problems too. Some work with other versions than the one supported by the supplier, others don't.
The only approach that could work is to have some means to assign java version to the application on client side - to somehow instruct the browser (IE) to load specific java based on the site.

Prasad Khandekar 4-Jul-13 7:51am

So you mean to say it's the applet based system?

Zoltán Zörgő 4-Jul-13 8:01am

Partially. The systems I am referring to run in a browser, are web based, but their architecture is not that simple. There are java components, that come from the server but run on client directly and not as applet. I have no deeper insight, maybe the "EMC Webtop" is telling you something.