Thanks for the info. The idea I'm starting to get here is that there
really isn't a built in method like JavaLoader in CF 10. With
JavaLoader, I can be very specific - load up a jar into the server scope
and access it whenever I choose. If I understand this correctly, CF 10
gives us the ability to load jar files - but in doing so, they can
override the built in ones, which would in fact surely break a tag or
two in the case of POI. I think that leaves me back to using JavaLoader,
which I'm OK with. The only problem I have is I can't figure out how to
make it work in CF 10. I have taken the classloader jar file and put in
cfusion/lib and bounced CF. It shows up as a valid class, and I can
create objects with it like so:
<cfobject type="java"
class="com.compoundtheory.classloader.NetworkClassLoader" name="test">
However, when I run my usual JavaLoader code, it bombs. The code is:
<cfif NOT structKeyExists(server, var.JLKey)>
<cfset server[var.JLKey] = createObject("component",
"component.JavaLoader").init(loadPaths=var.paths,
loadColdFusionClassPath=true) />
</cfif>
When running this code, specifically line 211 of JavaLoader.cfc throws
this exception:
java.lang.ClassNotFoundException:
com.compoundtheory.classloader.NetworkClassLoader at
java.net.URLClassLoader$1.run(URLClassLoader.java:202) at
java.security.AccessController.doPrivileged(Native Method) at
Has anyone seen this with CF 10 and been able to work around it?
On 9/20/12 10:10 PM, Douglas Knudsen wrote:
IIRC, Java will search class paths in order and uses the first match
it finds. So, I'm thinking since CF starts up, loads the built-in POI
jars, then eventually sees your app and loads the Jars again, albeit
newer versions, then this new version is lower in the 'order' The
disclaimer here is that I'm not a JAR head by trade :) I think you
could add the Jar in the CFAdmin tool, restart CF, then check the JVM
details and see if your JAR is higher in the order, it should be.
Might need to add this JAR in the jam.config manually though. (I
left that typo in, SpaceBalls! ) ok, jvm.config. EIther of these
might affect the CF tags using POI though.
A classic post on adding Jars is below, though I'd start with
http://carehart.org/cf411/ first :)
http://blogs.adobe.com/cantrell/archives/2004/07/the_definitive.html
HTH
Douglas Knudsen
[email protected] <mailto:[email protected]>
On Sep 20, 2012, at 7:11 PM, Mike Staver <[email protected]
<mailto:[email protected]>> wrote:
I can't find any good documentation from Adobe yet on how to
dynamically load and then use jar files. I previously used
JavaLoader, and after fixing the class load issues I had in code, it
worked flawlessly for the past few years. I was using it to load
newer versions of POI for excel manipulation, etc. I see now that
Adobe has built this into CF, and they have some docs that point to
using it like this:
|<||cfset| |THIS.javaSettings = {LoadPaths = [".\javalib\"],
loadColdFusionClassPath = true, reloadOnChange = true,watchInterval=30}>
|What they don't cover is how to create objects from these jar files
and use them in code. I found an example here:
http://www.isummation.com/blog/day-8-coldfusion-10-and-enhanced-java-integration/
I'm recursively loading POI 3.8 and all it's included jar files using
the example above. That doesn't throw any errors or give me any
indication that they aren't loaded. I'm doing this in
onApplicationStart(). My next challenge is to figure out how to
actually reference this new POI version. I assume I would load POI
something like this from the URL I included above:
|<||cfobject| |type=||"java"| |class=||"poi"| |name=||"myObj"||>
|
My question is - how do I reference "my" version of POI, rather than
the build in Adobe one which is a bit older than I need?
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