[Windup-users] Stable version throws NullPointerException, no usable instructions for non-stable version

[Steve Cohen]

I am trying to use windup for an application that should be its main use 
case - porting an application from web logic to Jboss - and find that it 
looks tantalizingly close to usable, but every attempt to use it hits a 
brick wall somewhere or other.


I've tried with the legacy 0.6.8 downloadable binary.  I am using source 
mode.  On some directories, useful output is produced.  On others, I get 
a null pointer exception:

Exception in thread "main" java.lang.NullPointerException
         at 
org.jboss.windup.interrogator.impl.JavaInterrogator.populateMeta(JavaInterrogator.java:153)
         at 
org.jboss.windup.interrogator.impl.JavaInterrogator.fileEntryToMeta(JavaInterrogator.java:97)
         at 
org.jboss.windup.interrogator.impl.JavaInterrogator.fileEntryToMeta(JavaInterrogator.java:43)
         at 
org.jboss.windup.interrogator.impl.ExtensionInterrogator.processFile(ExtensionInterrogator.java:76)
         at 
org.jboss.windup.interrogator.DirectoryInterrogationEngine.process(DirectoryInterrogationEngine.java:71)
         at 
org.jboss.windup.WindupMetaEngine.processSourceDirectory(WindupMetaEngine.java:190)
         at 
org.jboss.windup.WindupMetaEngine.getArchiveMeta(WindupMetaEngine.java:156)
         at 
org.jboss.windup.WindupReportEngine.generateReport(WindupReportEngine.java:121)
         at org.jboss.windup.WindupMain.processInput(WindupMain.java:144)
         at org.jboss.windup.WindupMain.main(WindupMain.java:71)

 From the source code I can find, I see that this problem may have been 
addressed (the line number in JavaInterrogator.java in the latest 
versions can't be the site of an exception throw) so I've tried some of 
the other builds that are available.

I've tried some of the source zips on github.  None of these build. 
There's always some unresolved dependency.

I've tried a download from the latest source on Github.  This DOES 
build, but how to execute it?  Following the instructions here:

https://github.com/windup/windup

I find everything in order until I go to run windup:

$ ./forge
Using Forge at /home/scohen/forge-distribution-2.7.2.Final
Warning: JAVA_HOME environment variable is not set.

     _____
    |  ___|__  _ __ __ _  ___
    | |_ / _ \| `__/ _` |/ _ \  \\
    |  _| (_) | | | (_| |  __/  //
    |_|  \___/|_|  \__, |\___|
                    |___/

JBoss Forge, version [ 2.7.2.Final ] - JBoss, by Red Hat, Inc. [ 
http://forge.jboss.org ]


[bin]$
[bin]$ addon-install --groupId org.jboss.windup.legacy.application 
--name legacy-windup --version 2.0.0.Alpha1
***SUCCESS*** Addon 
org.jboss.windup.legacy.application:legacy-windup,2.0.0.Alpha1 was 
installed successfully.
[bin]$
[bin]$ run-windup-1-x --input ~/vtone/build --output 
~/vtone/windupreports --packages com.whatever --sourceMode true
***ERROR*** Could not run Windup

How can I figure out what windup is objecting to?  This error message is 
not in the least helpful.

So my questions is now, for a non-developer of Windup, what version to 
use?  Presumably the stable (or "legacy") version would be the choice 
but what do if exceptions are found there?  Where is the source for the 
downloadable binary on the site?

If using the unstable bleeding edge versions, where are USABLE 
directions for use that don't lead somewhere, unlike the above?


Thanks for you help.

Steve Cohen