Rare project developers

[mc36 <>]

hi,

On 2/16/22 17:04, Alexander Gall wrote:
> On Wed, 16 Feb 2022 15:30:57 +0100, mc36 <> said:
>
> > hi,
> > On 2/16/22 15:22, Alexander Gall wrote:
> > > Hi
> > >
> > > My freerouter instance teminates after "show proc cpu" with
> > >
> > > java.lang.NoClassDefFoundError: java/lang/management/ManagementFactory at 
> > > logger.listThreads:logger.java:578/userShow.doer:userShow.java:421/userExec.executeCommand:userExec.java:2135/userExec.doCommands:userExec.java:1925/userLineHandler.doExec:userLine.java:810/userLineHandler.run:userLine.java:883/java.lang.Thread.run:Thread.java:832/
> > >
> > > I guess it tries to run an external command and doesn't find it.  Do
> > > you have a list of all the commands that freerouter would ever try to
> > > call? I need to make sure that all of them are present as Nix
> > > packages.
>
> > so the first part of at points to here:
> > https://github.com/mc36/freeRouter/blob/3c2ac7252f3b08261bfb4d64f3e5c6767ef72e23/src/net/freertr/util/logger.java#L578
> > and complains no class definition found, which tells me your _jre_ is 
> > incomplete....
>
> Please excuse my ignorance about everything related to java :(  Is
> this somehow related to what we talked about last year (this is from a
> message dating August 16 2021):

imho yesss...

> > > It appears that there are no JREs for Java 9 and later (I read that
> > > this is due to the introduction of the "Java Platform Module System"
> > > in Java 9) and the full JDK is a bit large for a runtime package. But
> > > Nix provides a way to build a "minimal JRE" from a JDK by specifiying
> > > the list of modules to include for the application. I started with the
> > > bare minimum, i.e. only java.base (giving me a nice lean JRE of 44MiB)
> > > and freertr seems to be fine with just that.  Can you confirm that
> > > this is all I need or are there any other modules I should include?
>
> > yess, the base is enough....
>
> If this is it, what else do I need to add besides "base"? If this is
> not the problem, where should I look next?

so with the bump to jre11 minimum and implementation of modules,
the jar itself describes the relations to the other packages:
https://github.com/mc36/freeRouter/blob/master/src/module-info.java
from this, you can safely omit the java.desktop, it's only used if
one issues "test window" through an x session to have a popup...
(back in the days it was added to test the applet drawing functions:)
but instead of hand-listing the modules, if the jar available when you
want to build the custom jre, you could span jdeps to collect at runtime....

regards,
cs