X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FCatalyst%2FController%2FMessageDriven.pm;h=d74452e3a899515d617567fcf674175af4495523;hb=7f592702c2333dca80ef4ef33f7f5850a9e97ca0;hp=fba221d864d1266f6a5f3b837adff6bb38fe295c;hpb=0a66358961c58c5fff96a363853ee93b00f55119;p=catagits%2FCatalyst-Engine-STOMP.git

diff --git a/lib/Catalyst/Controller/MessageDriven.pm b/lib/Catalyst/Controller/MessageDriven.pm
index fba221d..d74452e 100644
--- a/lib/Catalyst/Controller/MessageDriven.pm
+++ b/lib/Catalyst/Controller/MessageDriven.pm
@@ -1,40 +1,125 @@
 package Catalyst::Controller::MessageDriven;
 use Moose;
+use Data::Serializer;
+use namespace::autoclean;
 
 BEGIN { extends 'Catalyst::Controller' }
 
-__PACKAGE__->config(
-		    'default'   => 'text/x-yaml',
-		    'stash_key' => 'response',
-		    'map'       => { 'text/x-yaml' => 'YAML' },
-		   );
+=head1 NAME
 
-sub begin :ActionClass('Deserialize') { }
+Catalyst::Controller::MessageDriven
 
-sub end :ActionClass('Serialize') {
-	my ($self, $c) = @_;
+=head1 SYNOPSIS
 
-	# Engine will send our reply based on the value of this header.
-	$c->response->headers->header( 'X-Reply-Address' => $c->req->data->{reply_to} );
+  package MyApp::Controller::Queue;
+  use Moose;
+  BEGIN { extends 'Catalyst::Controller::MessageDriven' }
 
-	# 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 };
-		$c->error(0); # clear errors, so our response isn't clobbered
- 	}
+  sub some_action : Local {
+      my ($self, $c, $message) = @_;
+
+      # Handle message
+
+      # Reply with a minimal response message
+      my $response = { type => 'testaction_response' };
+      $c->stash->{response} = $response;
+  }
+
+=head1 DESCRIPTION
+
+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.
+
+=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<< $c->stash->{response} >>
+
+=cut
+
+__PACKAGE__->config( serializer => 'YAML' );
+
+sub begin : Private {
+    my ($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} = $message;
+    }
+}
+
+sub end : Private {
+    my ($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 );
 }
 
 sub default : Private {
-	my ($self, $c) = @_;
-	
-	# Forward the request to the appropriate action, based on the
-	# message type.
-	my $action = $c->req->data->{type};
-	$c->forward($action, [$c->req->data]);
+    my ($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;