cvsuser 04/09/28 08:20:09
Modified: App-Context/lib/App Context.pm
Log:
scheduled events, async events
Revision Changes Path
1.17 +164 -6 p5ee/App-Context/lib/App/Context.pm
Index: Context.pm
===================================================================
RCS file: /cvs/public/p5ee/App-Context/lib/App/Context.pm,v
retrieving revision 1.16
retrieving revision 1.17
diff -u -w -r1.16 -r1.17
--- Context.pm 2 Sep 2004 20:56:51 -0000 1.16
+++ Context.pm 28 Sep 2004 15:20:09 -0000 1.17
@@ -1,6 +1,6 @@
#############################################################################
-## $Id: Context.pm,v 1.16 2004/09/02 20:56:51 spadkins Exp $
+## $Id: Context.pm,v 1.17 2004/09/28 15:20:09 spadkins Exp $
#############################################################################
package App::Context;
@@ -255,6 +255,9 @@
$self->{events} = []; # the event queue starts empty
$self->{returntype} = "default"; # assume default return type
+ $self->{scheduled_events} = [];
+ $self->{scheduled_event} = {};
+
$self->_init(\%options); # allows the subclass to do initialization
$self->set_current_session($self->session("default"));
@@ -1663,7 +1666,7 @@
my $events = $self->{events};
my ($event, $service, $name, $method, $args);
my $results = "";
- my $display_current_widget = 1;
+ my $show_current_session_object = 1;
eval {
while ($#$events > -1) {
@@ -1674,10 +1677,10 @@
}
else {
$results = $self->call($service, $name, $method, $args);
- $display_current_widget = 0;
+ $show_current_session_object = 0;
}
}
- if ($display_current_widget) {
+ if ($show_current_session_object) {
my $type = $self->so_get("default","ctype","SessionObject");
my $name = $self->so_get("default","cname","default");
$results = $self->service($type, $name);
@@ -1713,9 +1716,15 @@
sub call {
&App::sub_entry if ($App::trace);
my ($self, $service_type, $name, $method, $args) = @_;
- my ($contents, $result);
+ my ($contents, $result, $service);
+
+ if ($service_type eq "Context") {
+ $service = $self;
+ }
+ else {
+ $service = $self->service($service_type, $name);
+ }
- my $service = $self->service($service_type, $name);
if (!$service) {
$result = "Service not defined: $service_type($name)\n";
}
@@ -1804,6 +1813,155 @@
}
#############################################################################
+# SCHEDULED EVENTS
+#############################################################################
+
+# valid attributes:
+# REQD: method => "do_it",
+# OPT: tag => "tag01", (identifies an event.)
+# OPT: service_type => "SessionObject", (method is on a SessionObject rather
than on the Context)
+# OPT: name => "prog_controller",
+# OPT: time => time() + 600,
+# OPT: interval => 600,
+# OPT: args => [ 1, 2, 3 ],
+# OPT: scheduled => 0,
+
+sub schedule_event {
+ &App::sub_entry if ($App::trace);
+ my $self = shift;
+ my %event = @_;
+
+ my $scheduled_event = $self->{scheduled_event};
+ my $scheduled_events = $self->{scheduled_events};
+
+ if (! defined $event{time}) {
+ $event{time} = time();
+ $event{time} += $event{interval} if ($event{interval});
+ }
+
+ my $unschedule = 0;
+ if (defined $event{scheduled}) {
+ $unschedule = ! $event{scheduled};
+ delete $event{scheduled};
+ }
+
+ die "schedule_event(): (tag or method) is a required attribute of an event" if
(!$event{tag} && !$event{method});
+ print "[$$] Schedule Event (", join(",",%event), ")\n" if ($self->{verbose} >=
3);
+
+ my $event;
+ if ($event{tag}) {
+ $event = $scheduled_event->{$event{tag}};
+ }
+ if ($event) {
+ foreach my $key (keys %event) {
+ $event->{$key} = $event{$key};
+ }
+ }
+ else {
+ $scheduled_event->{$event{tag}} = \%event if ($event{tag});
+ $event = \%event;
+ }
+
+ if ($event->{scheduled}) {
+ if ($unschedule && $event->{tag}) {
+ # remove from list of scheduled events
+ for (my $i = $#$scheduled_events; $i >= 0; $i--) {
+ if ($scheduled_events->[$i]{tag} eq $event->{tag}) {
+ splice(@$scheduled_events, $i, 1); # remove the event
+ $event->{scheduled} = 0;
+ last;
+ }
+ }
+ }
+ }
+ else {
+ if (!$unschedule) {
+ push(@$scheduled_events, $event);
+ $event->{scheduled} = 1;
+ }
+ }
+
+ &App::sub_exit() if ($App::trace);
+}
+
+sub get_current_events {
+ &App::sub_entry if ($App::trace);
+ my ($self, $events, $time) = @_;
+ $time = time() if (!$time);
+ my $time_of_next_event = 0;
+ @$events = ();
+ my $scheduled_event = $self->{scheduled_event};
+ my $scheduled_events = $self->{scheduled_events};
+ my $verbose = $self->{verbose};
+ my ($event);
+ # note: go in reverse order so that the splice() doesn't throw our indexes off
+ # we do unshift() to keep events executing in FIFO order for a particular time
+ for (my $i = $#$scheduled_events; $i >= 0; $i--) {
+ $event = $scheduled_events->[$i];
+ print "[$$] Checking event: time=$time [$event->{time}, every
$event->{interval}] $event->{method}().\n" if ($verbose >= 9);
+ if ($event->{time} <= $time) {
+ unshift(@$events, $event);
+ if ($event->{time} && $event->{interval}) {
+ $event->{time} += $event->{interval}; # reschedule the event
+ print "[$$] Event Rescheduled: time=$time [$event->{time}, every
$event->{interval}] $event->{method}().\n" if ($verbose >= 9);
+ if ($time_of_next_event == 0 || $event->{time} <
$time_of_next_event) {
+ $time_of_next_event = $event->{time};
+ }
+ }
+ else {
+ print "[$$] Event Removed: time=$time [$event->{time}, every
$event->{interval}] $event->{method}().\n" if ($verbose >= 9);
+ splice(@$scheduled_events, $i, 1); # remove the (one-time) event
+ $event->{scheduled} = 0;
+ }
+ }
+ else {
+ if ($time_of_next_event == 0 || $event->{time} < $time_of_next_event) {
+ $time_of_next_event = $event->{time};
+ }
+ }
+ }
+ &App::sub_exit($time_of_next_event) if ($App::trace);
+ return($time_of_next_event);
+}
+
+# NOTE: send_event() is similar to call(). I ought to resolve this.
+sub send_event {
+ &App::sub_entry if ($App::trace);
+ my ($self, $event) = @_;
+ my $method = $event->{method};
+ my @args = $event->{args} ? @{$event->{args}} : ();
+ my $service_type = $event->{service_type};
+ if ($service_type) {
+ my $name = $event->{name};
+ my $service = $self->service($service_type, $name);
+ print "[$$] Send Event: $service_type($name).$method(@args)\n" if
($self->{verbose} >= 3);
+ $service->$method(@args);
+ }
+ else {
+ print "[$$] Send Event: $method(@args)\n" if ($self->{verbose} >= 3);
+ $self->$method(@args);
+ }
+ &App::sub_exit() if ($App::trace);
+}
+
+# NOTE: The baseline context doesn't implement asynchronous events.
+# Therefore, it simply sends the event, then sends the callback event.
+# See Context::Cluster for a context that spawns processes.
+sub send_async_event {
+ &App::sub_entry if ($App::trace);
+ my ($self, $event, $callback_event) = @_;
+ $self->send_event($event);
+ if ($callback_event) {
+ my $event_tag = "local-$$";
+ if (! $callback_event->{args}) {
+ $callback_event->{args} = [ $event_tag ];
+ }
+ $self->send_event($callback_event);
+ }
+ &App::sub_exit() if ($App::trace);
+}
+
+#############################################################################
# shutdown()
#############################################################################
