move the ugly type check into the ugly method, to keep all the ugly in

one place; restore listening to single process mode in resque; move the
exception handling to inside the method, rather than around the
intializer, and log when resque errors happen in development in single
process mode

app/models/notification.rb

@@ -68,7 +68,7 @@ private
 
 
   def self.make_notification(recipient, target, actor, notification_type)
-    return nil if target.is_a?(Post) && post_visiblity_is_hidden?(recipient, target)
+    return nil if post_visiblity_is_hidden?(recipient, target)
     n = notification_type.new(:target => target,
                                :recipient_id => recipient.id)
     n.actors = n.actors | [actor]
@@ -77,7 +77,10 @@ private
     n
   end
 
+  #horrible hack that should not be here!
   def self.post_visiblity_is_hidden?(recipient, post)
+    return false unless post.is_a?(Post)
+
     contact = recipient.contact_for(post.author)
     return false unless contact && recipient && post
     pv = PostVisibility.where(:contact_id => contact.id, :post_id => post.id).first

config/initializers/resque.rb

@@ -6,17 +6,18 @@ if !ENV['SINGLE_PROCESS'] && AppConfig[:redis_url]
   Resque.redis = Redis.new(:host => AppConfig[:redis_url], :port => 6379)
 end
 
-begin
-  if ENV['SINGLE_PROCESS']
-    if Rails.env == 'production'
-      puts "WARNING: You are running Diaspora in production without Resque workers turned on.  Please don't do this."
-    end
-    module Resque
-      def enqueue(klass, *args)
+if ENV['SINGLE_PROCESS'] || AppConfig.single_process_mode
+  if Rails.env == 'production'
+    puts "WARNING: You are running Diaspora in production without Resque workers turned on.  Please don't do this."
+  end
+  module Resque
+    def enqueue(klass, *args)
+      begin 
         klass.send(:perform, *args)
+      rescue Exception => e
+        Rails.logger(e.message)
+        nil
       end
     end
   end
-rescue
-  nil
 end