use Moose;
BEGIN { extends 'Catalyst::Controller::MessageDriven' }
- sub some_action : Local {
+ sub some_action : Local {
my ($self, $c, $message) = @_;
- # Handle message
+ # Handle message
# Reply with a minimal response message
my $response = { type => 'testaction_response' };
A Catalyst controller base class for use with Catalyst::Engine::Stomp,
which handles YAML-serialized messages. A top-level "type" key in the
-YAML determines the action dispatched to.
+YAML determines the action dispatched to.
=cut
__PACKAGE__->config( serializer => 'YAML' );
-sub begin : Private {
- my ($self, $c) = @_;
-
- # Deserialize the request message
+sub begin : Private {
+ my ($self, $c) = @_;
+
+ # Deserialize the request message
my $message;
- my $serializer = $self->config->{serializer};
- my $s = Data::Serializer->new( serializer => $serializer );
- eval {
- my $body = $c->request->body;
- open my $IN, "$body" or die "can't open temp file $body";
- $message = $s->raw_deserialize(do { local $/; <$IN> });
- };
- if ($@) {
- # can't reply - reply_to is embedded in the message
- $c->error("exception in deserialize: $@");
- }
- else {
- $c->stash->{request} = $message;
- }
+ my $serializer = $self->config->{serializer};
+ my $s = Data::Serializer->new( serializer => $serializer );
+ eval {
+ my $body = $c->request->body;
+ open my $IN, "$body" or die "can't open temp file $body";
+ $message = $s->raw_deserialize(do { local $/; <$IN> });
+ };
+ if ($@) {
+ # can't reply - reply_to is embedded in the message
+ $c->error("exception in deserialize: $@");
+ }
+ else {
+ $c->stash->{request} = $message;
+ }
}
sub end : Private {
- my ($self, $c) = @_;
-
- # Engine will send our reply based on the value of this header.
- $c->response->headers->header( 'X-Reply-Address' => $c->stash->{request}->{reply_to} );
-
- # The wire response
- my $output;
-
- # Load a serializer
- my $serializer = $self->config->{serializer};
- my $s = Data::Serializer->new( serializer => $serializer );
-
- # Custom error handler - steal errors from catalyst and dump them into
- # the stash, to get them serialized out as the reply.
- if (scalar @{$c->error}) {
- my $error = join "\n", @{$c->error};
- $c->stash->{response} = { status => 'ERROR', error => $error };
- $output = $s->serialize( $c->stash->{response} );
- $c->clear_errors;
- $c->response->status(400);
- }
-
- # Serialize the response
- eval {
- $output = $s->raw_serialize( $c->stash->{response} );
- };
- if ($@) {
- my $error = "exception in serialize: $@";
- $c->stash->{response} = { status => 'ERROR', error => $error };
- $output = $s->serialize( $c->stash->{response} );
- $c->response->status(400);
- }
-
- $c->response->output( $output );
+ my ($self, $c) = @_;
+
+ # Engine will send our reply based on the value of this header.
+ $c->response->headers->header( 'X-Reply-Address' => $c->stash->{request}->{reply_to} );
+
+ # The wire response
+ my $output;
+
+ # Load a serializer
+ my $serializer = $self->config->{serializer};
+ my $s = Data::Serializer->new( serializer => $serializer );
+
+ # Custom error handler - steal errors from catalyst and dump them into
+ # the stash, to get them serialized out as the reply.
+ if (scalar @{$c->error}) {
+ my $error = join "\n", @{$c->error};
+ $c->stash->{response} = { status => 'ERROR', error => $error };
+ $output = $s->serialize( $c->stash->{response} );
+ $c->clear_errors;
+ $c->response->status(400);
+ }
+
+ # Serialize the response
+ eval {
+ $output = $s->raw_serialize( $c->stash->{response} );
+ };
+ if ($@) {
+ my $error = "exception in serialize: $@";
+ $c->stash->{response} = { status => 'ERROR', error => $error };
+ $output = $s->serialize( $c->stash->{response} );
+ $c->response->status(400);
+ }
+
+ $c->response->output( $output );
}
sub default : Private {
- my ($self, $c) = @_;
-
- # Forward the request to the appropriate action, based on the
- # message type.
- my $action = $c->stash->{request}->{type};
- if (defined $action) {
- $c->forward($action, [$c->stash->{request}]);
- }
- else {
- $c->error('no message type specified');
- }
+ my ($self, $c) = @_;
+
+ # Forward the request to the appropriate action, based on the
+ # message type.
+ my $action = $c->stash->{request}->{type};
+ if (defined $action) {
+ $c->forward($action, [$c->stash->{request}]);
+ }
+ else {
+ $c->error('no message type specified');
+ }
}
__PACKAGE__->meta->make_immutable;
-1;
BEGIN {
$ENV{CATALYST_ENGINE} = 'Stomp';
require Catalyst::Engine::Stomp;
- }
+ }
MyApp->config->{Engine::Stomp} =
{
=head1 DESCRIPTION
Write a Catalyst app connected to a Stomp messagebroker, not HTTP. You
-need a controller that understands messaging, as well as this engine.
+need a controller that understands messaging, as well as this engine.
This is single-threaded and single process - you need to run multiple
instances of this engine to get concurrency, and configure your broker
Controllers are mapped to Stomp queues, and a controller base class is
provided, Catalyst::Controller::MessageDriven, which implements
-YAML-serialized messages, mapping a top-level YAML "type" key to
-the action.
+YAML-serialized messages, mapping a top-level YAML "type" key to
+the action.
=head1 METHODS
foreach my $queue (@queues) {
my $queue_name = "/queue/$queue";
$self->connection->subscribe({
- destination => $queue_name,
- ack => 'client'
+ destination => $queue_name,
+ ack => 'client'
});
}
sub handle_stomp_error {
my ($self, $app, $frame) = @_;
-
+
my $error = $frame->headers->{message};
$app->log->debug("Got Stomp error: $error");
}