Hi Arthur,
On Thu, 26 Jan 2012, Arthur D. Edelstein wrote:
> > Clojure's notation is a mild nightmare if you ask me;
>
> The transition from Clojure 1.2 to 1.3 has been unnecessarily painful
> in my opinion (I complained about this at length on the Clojure
> mailing list) but in general I do like lisp notation. :)))))
You have too many closing parens there.
Besides, I am not complaining about Lisp notation. I am complaining about
the use of non-alphanumerical-plus-dash characters that all have a certain
meaning that you have to learn if you want to use Clojure (instead of
having obvious English labels). That was a lousy job: now everybody who
has to cope with Clojure really needs to sit down to learn a notation
instead of diving into the beauty of functional programming. Dumb.
> > In particular, the problem manifests itself as
> >
> > Exception in thread "Acquisition Engine Thread (Clojure)"
> > java.lang.IllegalStateException: Can't dynamically bind non-dynamic var:
> > ...
> > at org.micromanager.acq_engine$run_acquisition.invoke(acq_engine.clj:437)
> > at org.micromanager.acq_engine$_run$fn__1111.invoke(acq_engine.clj:636)
> > ...
> >
http://blog.japila.pl/2011/03/cant-dynamically-bind-non-dynamic-var-in-clojure-1-3/>
> I think I have eliminated such issues in the code last year. Right now
> there is no code at acq_engine.clj:437, so I think you may have either
> an old version of the source code or the bytecode.
Indeed, I have a slightly older version around. Worse, I cannot fully test
the setup myself: the microscope for which I wrote a µManager driver and
a GUI sits 7 tzs away.
> You may need to svn update and recompile the acquisition engine to make
> sure your bytecode is up to date. There's a Makefile.am and a build.bat
> in the acqEngine directory.
Unfortunately, it is not as easy as that. I have over 100 commits on top
of some older revision, partially accomodating for newer libraries in
Fiji, partially for Fiji's more flexible multi-platform directory
structure, partially just trying to clean up the many confusing different
targets for generated files (bin_Win32/, Install_Win32/ and sometimes even
directly into C:\Program Files -- which might not even exist on
non-English Windows or even worse is the wrong directory on 64-bit boxes).
It is all far from ideal, I tried to make it so that the compile products
are stored in a dist/ directory which has a fully functional Fiji with
µManager after a complete build, but the bin_Win32/ directories and
friends did not go away, I did not have time to go the full nine yards
there.
To stay up-to-date I usually use git-svn (because Git has so much more
powerful tools than Subversion, such as 'rebase -i'). That does not work
too well, though, since many of the files in the Subversion repository
were checked in with DOS line endings! So I get millions of conflicts
where I should get none.
So I asked my colleagues to check out just acqEngine and mmstudio from the
current trunk and it seemed as if that worked and produced the same error.
However, a quick check when I finally had access again to my virtual
Windows machine, it turns out that mmstudio requires changes in the core
to compile, so that test was erroneous.
So: sorry for the noise, I should have gone through the painful process of
forward-porting my patches onto the current Subversion revision.
> > (In short: Clojure 1.3 requires variables that need to be rebound
> > later to be defined with the ^:dynamic tag -- very, very intuitive...
> > However, I did not find any place where 'state' is defined explicitly,
> > but I suspect that it is the 'swap!' call in 'prepare-state'. But all
> > that is completely over my head.)
>
> (The reason for the ^:dynamic weirdness is that the authors of Clojure
> are strongly discouraging the rebinding of vars. Rather you should use
> atoms, refs or agents for stateful data. The swap! call is operating on
> an atom and doesn't have anything to do with vars.)
>
> I hope this helps! Please let me know if you are still running into
> problems.
Thanks for all your assistance!
Ciao,
Dscho
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