--- Steve Loughran <[EMAIL PROTECTED]> wrote:
> Peter Nabbefeld wrote:
> >
> > Hello,
> >
> > I've asked this question on the users list, but it
> seems nobody knows
> > there:
> > Is it possible to create two java processes (with
> fork="true") and pipe
> > the output of one process into the other?
>
> Not yet :)
>
> Ant1.6.2 added the notion of the ioredirector to
> exec and java, but no
> direct coupling of apps. You'd have to write your
> own filter to route
> the stuff...and ant equivalent of Unix named pipes
Yep. To let my own proverbial (dead) cat out of the
bag, this was one of my original goals when I exposed
the redirector functionality. After committing the
current functionality, I had added the additional
concept of an (input|output|error)ref attribute:
inputref would specify a reference to an inputstream
from which input should be read; (output|error)ref
would specify a reference to an inputstream from which
another process could read, created using a
PipedOutputStream->PipedInputStream (actually an
oata.util.LeadPipeInputStream) set. Concurrency
issues were solved by a ProxyInputStream class; while
locking at the Redirector class level (no new stream
references added), the Project would be probed for the
named InputStream. If none were found, a
ProxyInputStream would be created that would continue
to search for the (literally) "named pipe". This all
worked like a charm...
...on Unix (Solaris, I like to think it probably would
have worked on other Unix systems). I could not for
all the world convince the stupid Windows JREs not to
deadlock on any but the simplest uses of this. I have
since lost that bit of code, but could re-create if
any Threading gurus want to take a stab at it.
-Matt
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