wildfly does not run on Power8 hardware

I am doing testing on power pc architecture and I noticed that the wildfly charm does not run on that platform.

Here is the error message from the charm unit logs:
2014-08-06 17:56:32 INFO juju-log Starting wildfly apllication server
2014-08-06 17:56:32 INFO config-changed * Starting WildFly Application Server wildfly
2014-08-06 17:57:03 INFO config-changed ...fail!
2014-08-06 17:57:03 INFO config-changed * WildFly Application Server hasn't started within the timeout allowed
2014-08-06 17:57:03 INFO config-changed * please review file /var/log/wildfly/console.log to see the status of the service

/var/log/wildfly/console.log:

=========================================================================

  JBoss Bootstrap Environment

  JBOSS_HOME: /opt/wildfly

  JAVA: /usr/lib/jvm/java-7-openjdk-amd64/bin/java

  JAVA_OPTS: -server -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true

=========================================================================

/opt/wildfly/bin/standalone.sh: 1: eval: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: not found
7191

I did some digging and I see that the /etc/init.d/wildfly file hardcodes "amd64" for JAVA_HOME. This is the reason that wildfly does not work on ppc64el architecture. When I chagned amd64 to ppc64el I got wildfly to come up. This file is based on the templates/wildfly-init-debian.sh file in the charm.

We need to set the JAVA_HOME in a more architecture independent way. The way I came up with is using the readlink command on the /etc/alteratives/java symbolic link.

 JAVA_HOME=`readlink -f /etc/alternatives/java | sed -e 's/\/jre\/bin\/java//'`