Bullock, Howard A. <> wrote:
> In the script example, which I want to be executed as a PDK PerlSvc
> program (Win32 Service), the accept() method is blocking.
>
> Is there another module or a technique that I could use to eliminate
> the blocking and have the loop continue so that if the service
> control manager sends a STOP to the service the program will cycle
> back to the PerlSvc ContinueRun function stopping the loop?
>
> my $SMTPserver = new Net::SMTP::Server(); while (ContinueRun(1)) {
> # Place main code or call to main code here
> my $conn = $SMTPserver->accept();
> my $client = new Net::SMTP::Server::Client($conn);
> if (! $client) {
> WriteLog(LogFileName(), "Error: ABEND: Unable to handle client
> connection: $!");
> }
> $client->process;
> }
Net::SMTP::Server (as well as being old - last released in 1999, and not
having great reviews) seems to be no more that a wrapper around an
IO::Socket object. (I can't see the point in that, it just gets in the
way. Deriving from IO::Socket might have been better.) If you create the
IO::Socket directly then you could use IO::Select to time limit the wait
for a connection in your while loop. For example (untested, of course):
my $server = IO::Socket::INET->new(LocalPort => 25, Listen => 1, Reuse
=> 1);
my $sel = IO::Select->new;
$sel->add($server);
my $time_limit = 0.5;
while (ContinueRun(1)) {
my @fds = $sel->can_read($time_limit);
if (@fds > 0) {
my $client = new Net::SMTP::Server::Client($fds[0]->accept());
... etc.
}
}
HTH
--
Brian Raven
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