Server-Process-Programming

Question

hi,
i like to develope a server-process. a server-process should have the possibility for the following commands: start, stop, reload, restart.
but now i stand for a simple question: how can i communicate between 2 different java-programs? why? simple example:
1. start a server-process:
# java -jar myproc.jar start
2. stop a server-process:
# java -jar myproc.jar stop
the 2nd java-proc should notify the first to stop, but how, without a file-solution?
exist there a poss. to comunicate over input-streams between 2 java-progs?
thx for ideas
oliver scorp

Answer 1

You have 100 processes running on your box on startup? And all of them allow you to stop and start them?
Isn't one of those processes the one that allows you
to access the hard drive? What exactly happens when
you stop that?
ah, a unix-newby!Again what happens when you stop the processes that allow you to read and write to the hard drive?
>
... I would guess that most processes in standardunix box start up configuration do not allow you to
start and stop them from the command line ...
what a shit! for ex. look in your
/etc/init.d/-directory! there you can see the most
deamons/processes which you can start/stop aso.
manually on the commandline. (driver-modules
included)And you can use kill -9 on them as root as well right? But if you do you might as well hard boot the box, because nothing is going to work after that.
>
... What can I say. You can always use C ...really?! what a surprise! or maybe i write it in
visual basic?!
... And what Java API do you use to communicatebetween different processes on a linux using pipes?
pipes doesn't work between different jre/processes!A named pipe doesn't work between different processes?
>
... Because not all platforms have a process id. Andnot all platforms provide a communication mechanism,
like pipes, between processes ...
that's wrong!No it is right. See the part where I said platforms? Java works on other platforms besides unix.
Win 9x does not have process ids nor do they have pipes.
>
1. the sun-developer had implemented a process-class
but doesn't finished it. you can create new processes
in java (with .exec) but you can't create an own
process-object from the running jre. and you can't
share this process-objects between diff.
jre/processes.Eh?
>
2. every thread has an own id.
with other words: the mention of java is: when the
system gives not the necessary infos then java create
it.
Again eh? Are you claiming that a thread id is the same as a process id?
3. which os doesn't use pid's? every
multitasking-system has a process-management for which
they have implementations of unique process-id's
(numeric or alphanumeric)
Nope, not win 9x.
that's typical ...
... many words with no solution!
this can be only a troll!
so, please go to your hole!Hmmmmm....no one ever called me that before
>
for all other: i am searching for quickanddirty MEMORY
or STREAM/PIPE-solution between DIFFERENT
JRE'S/processes in JAVA and maybe for already
implemented c/jiny-solution.
but please don't tell me to do it with
net/file-sockets (what is if you don't have a network
(by net-socket) or what is if you have no rw-access
(by file-solutions)). i know this ways but i am not
looking for.I covered all of them. Presumably with your expertise you know how to use google so I would expect that you should be able to find a public domain soluton for your particular OS if it exists.