[Spread-users] send text to spread group from command line?

[Yair Amir]

Hi,

Thanks George.

I would add two more lines to this code (although not practically necessary today) for
disconnection (see the edit in the code below).

Note that in regular operation, if you intend to send many 
messages per second using this kind of method, perl or no perl, 
there will be considerable overhead associated with it.
This is because each time there will be a connection and disconnection with Spread. 
Now, connecting to Spread is much much more expensive than just sending a message.

Regularly, Spread should be used in most cases in a way that you connect with it.

There was some discussion a few weeks ago on this list I think, and we talked a bit
about this in our group, about developing a publishing method, where the sending
entity will not be a fully privilege client (for example, it will not be able to
join groups or receive message). With such method, there will not be a need to 
connect and this will not be more expensive then sending a message. (Theo talked
about some shared memory solutions).

	Cheers,

	:) Yair.	http://www.cnds.jhu.edu

George Schlossnagle wrote:
> 
> There's not one that ships with Spread, but it's simple enough to write.
> Here's a short one:
> 
> #include "stdio.h"
> #include "stdlib.h"
> #include <unistd.h>
> #include "string.h"
> #include "sp.h"
> 
> void usage(char *s)
> {
>     fprintf(stderr, "%s -g <group> -s server\n", s);
> }
> 
> int main(int argc, char **argv)
> {
>     char *server = 0;
>     char *group = 0;
>     char line[1024];
>     char privatename[MAX_GROUP_NAME];
>     char privategroup[MAX_GROUP_NAME];
>     int retval;
>     int getoption;
>     mailbox mbox;
> 
>     while((getoption = getopt(argc, argv, "g:s:h:")) != -1) {
>         switch(getoption)
>         {
>             case 'g':
>                 group = optarg;
>                 break;
>             case 's':
>                 server = optarg;
>                 break;
>             default:
>                 usage(argv[0]);
>                 return -1;
>                 break;
>         }
>     }
>     if( group == 0 || server == 0) {
>         usage(argv[0]);
>         return -1;
>     }
>     snprintf(privatename, MAX_GROUP_NAME, "sp_client_%d", getpid());
>     if((retval = SP_connect(server, privatename, 0, 0, &mbox, privategroup))
> <
> 0 )
>     {
>         SP_error(retval);
>         return -1;
>     }
>     while(fgets(line, 1024, stdin)) {
>         fprintf(stderr, "%s", line);
>         if((retval = SP_multicast( mbox, RELIABLE_MESS, group, 1,
> strlen(line),
>             line)) < 0)
>         {
>             SP_error(retval);
	      SP_disconnect( mbox );
>             return -1;
>         }
>     }
      SP_disconnect( mbox );
> }
> 
> name it sp_client.c and compile it with
> gcc -c sp_client.c
> gcc -o sp_client sp_client.o -lsp
> 
> ----- Original Message -----
> From: "Monte Ohrt" <monte at ispi.net>
> To: "spread mailing list" <spread-users at lists.spread.org>
> Sent: Friday, August 17, 2001 12:39 PM
> Subject: [Spread-users] send text to spread group from command line?
> 
> > Is there a way to send text to a spread group from the command line? I
> > guess I'm asking if there is a non-interactive client that can take
> > input like so:
> >
> > spread_client -g groupname -s 4803 < input.txt
> >
> > or:
> >
> > echo input.txt | spread_client -g groupname -s 4803
> >
> > If there _is_ such a client, could this be used in apache for spreading
> > the error_logs instead of the perl script that comes with
> > mod_log_spread? I'm trying to avoid perl :-)
> >
> > ErrorLog = "|/path/to/spread_client -g group -s port"
> >
> > --
> > Monte Ohrt <monte at ispi.net>
> > http://www.ispi.net/
> >
> >
> > _______________________________________________
> > spread-users mailing list
> > spread-users at lists.spread.org
> > http://lists.spread.org/mailman/listinfo/spread-users
> >
> 
> _______________________________________________
> spread-users mailing list
> spread-users at lists.spread.org
> http://lists.spread.org/mailman/listinfo/spread-users