ensure that we only try to log exceptions when raven is available

lib/postal/app_logger.rb

@@ -27,7 +27,9 @@ module Postal
           n.notify!(:short_message => message_without_ansi, :log_name => @log_name, :facility => 'postal', :application_name => 'postal', :process_name => ENV['PROC_NAME'], :pid => Process.pid)
         rescue => e
           # Can't log this to GELF. Soz.
-          Raven.capture_exception(e)
+          if defined?(Raven)
+            Raven.capture_exception(e)
+          end
         end
       end
       true

lib/postal/fast_server/client.rb

@@ -108,7 +108,9 @@ module Postal
       rescue BadRequest
         # We couldn't read a proper HTTP request, disconnect the client
       rescue => e
-        Raven.capture_exception(e)
+        if defined?(Raven)
+          Raven.capture_exception(e)
+        end
       ensure
         @socket.close rescue nil
         @raw_socket.close rescue nil

lib/postal/fast_server/interface.rb

@@ -37,7 +37,9 @@ module Postal
             rescue => e
               # Somethign else went wrong. We don't want to stop the image loading though because
               # this is our problem. Log this exception though.
-              Raven.capture_exception(e)
+              if defined?(Raven)
+                Raven.capture_exception(e)
+              end
             end
             source_image = request.params['src']
             if source_image.nil?

lib/postal/fast_server/server.rb

@@ -25,7 +25,9 @@ module Postal
             rescue IO::WaitReadable, Errno::EINTR
               # Never mind, guess the client went away
             rescue => e
-              Raven.capture_exception(e)
+              if defined?(Raven)
+                Raven.capture_exception(e)
+              end
               client_io.close rescue nil
             end
           end

lib/postal/message_parser.rb

@@ -51,7 +51,9 @@ module Postal
       if Rails.env.development?
         raise
       else
-        Raven.capture_exception(e)
+        if defined?(Raven)
+          Raven.capture_exception(e)
+        end
         @actioned = false
         @tracked_links = 0
         @tracked_images = 0

lib/postal/smtp_sender.rb

@@ -170,7 +170,9 @@ module Postal
         safe_rset
       rescue => e
         log "#{e.class}: #{e.message}"
-        Raven.capture_exception(e, :extra => {:log_id => @log_id, :server_id => message.server.id, :message_id => message.id})
+        if defined?(Raven)
+          Raven.capture_exception(e, :extra => {:log_id => @log_id, :server_id => message.server.id, :message_id => message.id})
+        end
         result.type = 'SoftFail'
         result.retry = true
         result.details = "An error occurred while sending the message to #{destination_host_description}"

lib/postal/smtp_server/server.rb

@@ -115,7 +115,9 @@ module Postal
                 clients[new_io] = client
                 @epoll.add(new_io, Epoll::IN|Epoll::PRI|Epoll::HUP)
               rescue => e
-                Raven.capture_exception(e, :extra => {:log_id => (client.id rescue nil)})
+                if defined?(Raven)
+                  Raven.capture_exception(e, :extra => {:log_id => (client.id rescue nil)})
+                end
                 logger.error "An error occurred while accepting a new client."
                 logger.error "#{e.class}: #{e.message}"
                 e.backtrace.each do |line|
@@ -192,7 +194,9 @@ module Postal
                 end
               rescue => e
                 client_id = client ? client.id : '------'
-                Raven.capture_exception(e, :extra => {:log_id => (client.id rescue nil)})
+                if defined?(Raven)
+                  Raven.capture_exception(e, :extra => {:log_id => (client.id rescue nil)})
+                end
                 logger.error "[#{client_id}] An error occurred while processing data from a client."
                 logger.error "[#{client_id}] #{e.class}: #{e.message}"
                 e.backtrace.each do |line|
@@ -281,7 +285,9 @@ module Postal
                 end
               end
             rescue => e
-              Raven.capture_exception(e, :extra => {:log_id => (client.id rescue nil)})
+              if defined?(Raven)
+                Raven.capture_exception(e, :extra => {:log_id => (client.id rescue nil)})
+              end
               logger.error "An error occurred while handling a client."
               logger.error "#{e.class}: #{e.message}"
               e.backtrace.each do |line|

lib/postal/worker.rb

@@ -52,7 +52,9 @@ module Postal
             klass = message['class_name'].constantize.new(message['id'], message['params'])
             klass.perform
           rescue => e
-            Raven.capture_exception(e, :extra => {:job_id => message['id']})
+            if defined?(Raven)
+              Raven.capture_exception(e, :extra => {:job_id => message['id']})
+            end
             logger.warn "[#{message['id']}] \e[31m#{e.class}: #{e.message}\e[0m"
             e.backtrace.each do |line|
               logger.warn "[#{message['id']}]    " + line