package Catalyst::Controller::MessageDriven;
use Moose;
+use Data::Serializer;
+use namespace::autoclean;
BEGIN { extends 'Catalyst::Controller' }
BEGIN { extends 'Catalyst::Controller::MessageDriven' }
sub some_action : Local {
- my ($self, $c) = @_;
+ my ($self, $c, $message) = @_;
+
+ # Handle message
+
# Reply with a minimal response message
my $response = { type => 'testaction_response' };
$c->stash->{response} = $response;
which handles YAML-serialized messages. A top-level "type" key in the
YAML determines the action dispatched to.
+=head1 METHODS
+
+=head2 begin
+
+Deserializes the request into C<< $c->stash->{request} >>
+
+=head2 default
+
+Dispatches to method named by the key C<< $c->stash->{request}->{type} >>
+
+=head2 end
+
+Serializes the response from C<< $c->stash->{response} >>
+
=cut
-__PACKAGE__->config(
- 'default' => 'text/x-yaml',
- 'stash_key' => 'response',
- 'map' => { 'text/x-yaml' => 'YAML' },
- );
+__PACKAGE__->config( serializer => 'YAML' );
-sub begin :ActionClass('Deserialize') { }
+sub begin : Private {
+ my ($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} = $message;
+ }
+}
-sub end :ActionClass('Serialize') {
+sub end : Private {
my ($self, $c) = @_;
# Engine will send our reply based on the value of this header.
- $c->response->headers->header( 'X-Reply-Address' => $c->req->data->{reply_to} );
+ $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 };
- $c->error(0); # clear errors, so our response isn't clobbered
+ $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 {
# Forward the request to the appropriate action, based on the
# message type.
- my $action = $c->req->data->{type};
- $c->forward($action, [$c->req->data]);
+ 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;