Replace Oracle Java by zulu embedded

[ThomDietrich]

This was easier than expected. Worked right away and removed a painful extra step we had to take with Oracle Java till now. Oracle Java ist still available as a menu option for now. (Testing and i386)

Signed-off-by: Thomas Dietrich thomas.dietrich@tu-ilmenau.de (github: ThomDietrich)

[kaikreuzer]

FYI, I just came across an issue: openhab/openhab-distro#421
It seems that others have already solved this problem, but for me (testing on my PINE64 image), that didn't work out yet.
Before merging this PR, could you test it yourself as well? And maybe you have an idea what to do about it?

[ThomDietrich]

And maybe you have an idea what to do about it?

Not use the chart servlet. 😃 Yes I'll look into that but if this is chart servlet implementation related, I might not be of much help.
The only testing I did so far was to have openHAB correctly start up and doing a CPU usage comparison (it's equal to Oracle Java).

[kaikreuzer]

it's equal to Oracle Java

That's good news (and matches my experience, although I had never done precise comparisons).

[AngelosF]

I will test on my rPi3 also the charts. So far, I don't use them.
I just installed Zulu Embedded on Raspbian Jessie and it works fine (so far).
After I installed it, I wrote a mini-HowTo (here)

[ThomDietrich]

Howto looks great! Nothing to criticize after my experiments from yesterday

[ThomDietrich]

@kaikreuzer

sudo apt install libfontconfig1 fontconfig ttf-dejavu
...
The following NEW packages will be installed:
  fontconfig fontconfig-config fonts-dejavu fonts-dejavu-core fonts-dejavu-extra libfontconfig1 libfreetype6 libpng12-0 ttf-dejavu ttf-dejavu-core ttf-dejavu-extra

sitemap test label="My home automation" {
    Text label="Test"
    Frame {
        Chart item=Demo_KitchenTemperature label="Test" period=h refresh=600
    }
}

[kaikreuzer]

Thanks for testing @ThomDietrich, that's good news. (You might want to check, what is the minimal requirement, some people said libfontconfig1 should be enough already).

My problem remains, though, so I guess something is different on the PINE64... If openHABian on the PINE64 does not have this problem either, I'll move asap :-)

[ThomDietrich]

I'll look into reducing the needed packages and adding them during openHABian setup and test the whole thing on the pine. After that's done, do I have your lgtm?

[kaikreuzer]

do I have your lgtm?

Certainly yes!

[AngelosF]

fyi: Charts work after sudo apt install libfontconfig1 fontconfig ttf-dejavu
https://community.openhab.org/t/howto-install-zulu-embedded-java-on-raspberry-pi-3/22589/11

[ThomDietrich]

Included in #97