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19 March 2013

A Smartphone as a JEE Server: Glassfish 4 on Ubuntu TouchLast year, following the release of the much anticipated Raspberry Pi, Steve couldn’t resist getting JBoss EAP 6 to run on it, which hemanaged with minimal effort!

Not to be outdone, I’ve been inspired by the recent release of Ubuntu Touch – Canonical’s offering for mobile devices. MarkShuttleworth’s trailer videos for the upcoming OS gave me a lot to be excited about; I’ve long been wondering what could be possible ifonly I could unlock the power of the computer I have in my pocket.

Android is (at the moment) my favourite mobile OS, but it’s always disappointed me a little that there was no way to get Java running onit since it lacks necessary packages so when Ubuntu Touch was announced, it finally seemed that there was a New Hope!

Surprisingly easily, once you know the correct steps.

Installing Ubuntu on the Galaxy Nexus is as easy as a single command, provided you’ve already unlocked the bootloader. Theinstallation process took a while – around 30 minutes I think. In any case, it was far too long for a keen early adopter to just sit aroundwaiting! To fill my time, I downloaded the latest Java SE embedded from Oracle (a painful mistake) and the latest promoted build ofGlassfish 4. (If you’re going to be an early adopter, you may as well do it right.)

Ubuntu installs itself very differently to how I expected and, being unfamiliar with Android administration, there was a bit of a learningcurve! Using the Ubuntu SDK’s QT creator IDE, you can easily start an SSH session to your phone, once you have wifi configured. Iexpected the terminal to be limited to some degree, but what I didn’t expect was for it to lie to me!

After connecting, a quick pwd tells me I’m in the /home/phablet directory (phablet being the default user in Ubuntu Touch). The “phablet”user has limited permissions and I quickly found I was unable to switch to the root user. I’m an impatient man at the best of times, sorather than try to spend time fixing that, I simply used the Android Developer Bridge (adb) that QT uses to connect to the device. Acouple of further pwds in various directories told me that Ubuntu actually creates /data/ubuntu and uses that directory as root, soalthough the “phablet” user couldn’t see outside of it to the Android files, the root ADB user could!

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Installing Java was not a fun task. I tried various ways of transferring the downloaded file over to the phone using any method I could thinkof which would work on a full terminal. Finally, I resorted to ADB once more, using the push command. I then quickly found out that theterminal was powered by BusyBox and it simply refused to run certain packages. (At this point, I suspected a full conspiracy towards myfailure by my phone and Ubuntu desktop.)

I am nothing if not stubborn, however, and, remembering that OpenJDK 7 is certified for ARM chipsets, I just tried to run apt-get on theright package from QT which, to my surprise, worked first time!

phablet@localhost:~$ java -version

java -version

java version "1.7.0_07"

OpenJDK Runtime Environment (IcedTea7 2.3.2) (7u7-2.3.2a-1ubuntu1)

OpenJDK Zero VM (build 22.0-b10, mixed mode)

I wasn’t expecting much success after the trials of getting Java to run in an environment that was so foreign to me, but I had a goanyway. After getting the latest promoted build of Glassfish 4 from the Aquarium, I pushed the .zip over to the device with ADB again.After unzipping, I tried to start the domain: bin/asadmin start-domain domain1

Nothing.

BusyBox refused to execute asadmin (I ran chmod 755 just to be sure). Since I’d spent the best part of the afternoon on trying to get thisto work, in desperation, I thought I would move the installation directory to /home/phablet and try to run the command over SSH, ratherthan as root over ADB.

I ran the same command and, to my surprise, Glassfish started to load. Surprise quickly turned to horror when I realised that I wasrunning full Glassfish on full Java 7 without changing any heap settings!

After about 2 minutes of waiting with bated breath, the command returned that it had started successfully. I could hardly believe it, so Iwent to the admin console to check:

Installing Java

Installing Glassfish 4

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Posted by Mike Croft at 21:43

Labels: Android , Galaxy Nexus , glassfish , Glassfish 4. JEE , java , Ubuntu Touch

Not bad for an afternoon’s work! Now all that’s left is to configure it!

All in all, Ubuntu Touch is certainly not ready for the public, but I’m very impressed with Unity as a smartphone interface and the power ofhaving a full linux distribution in your pocket.

Mike Croft@croft

+9 Recommend this on Google

3 comments :

Özkan Pakdil 12 April 2013 03:34

in near future people will serve their sites via their phones(pocket servers) =)

Reply

iocean X7 14 May 2013 09:23

Smartphone as a server, perhaps in the future be able to get new development

Reply

Anonymous 29 June 2013 11:20

Hello,

Thanks a lot !

I try to use the adb push to send a .jar to my Nexus 4. It's seems ok but on the Nexus4 I don't find the file. Do you have an idea where ismy mistake ?

EAP 5 and EAP 6

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Maybe do I chose a specific folder ?

Kind regards

Jeremy.

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Get your ow n Widget

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