Jamison Hope wrote:
>I'm writing a program which needs to do the following things:
>
>1. Open a connection to a message-passing system which communicates via
>SysV IPC.
>2. Invoke a JVM and instantiate some GUI objects (i.e. the AWT not-on-
>mail-thread rule applies).
>3. Listen for messages on IPC, and convert them into appropriate Java
>method calls (and do them).
>4. Cleanly disconnect from the IPC system when the program quits.
I neglected to mention this before...
If your IPC communication uses Unix domain sockets, there are existing JNI
libraries that can provide that functionality, sometimes as a Socket class.
As outlined in my earlier suggestion, your Java code would then run as a
normal Java main() method, launched with the usual 'java' command or
JavaApplicationStub. It would then call the functions in the JNI libs to
communicate. This is fundamentally a Java application that happens to use
native libs, which is the opposite direction of your current approach: a
native application that happens to use a JVM.
When I was researching Unix domain sockets a while ago, I concluded the
Jtux library by Mark Rochkind was worth investigating further. A different
project came up that took me off Unix domain sockets, or I would have
researched this more fully at that time. Jtux certainly looked more
promising than anything else I found, but YMMV.
Jtux -- Java-to-Unix -- (~BSD License) - JDK 1.4.2
<http://www.basepath.com/aup/jtux/>
It covers a LOT of Unix functionality, but IS NOT an object-oriented view
of the Unix/Posix API. It has good reference material written about it,
and it has been tested on Mac OS X (10.4). It also comes with a BSD-like
license, where the other libs I found were GPL or LGPL.
The Jtux web page also has links to other libs, which may be of interest.
-- GG
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