Implement missing fix for 2.0 compatibility

Increase log-courier gem dependency for byte/length fix
Fixes driskell/log-courier#247
Fixes driskell/log-courier#200
1.9.0

Gemfile.lock

@@ -1,8 +1,8 @@
 PATH
   remote: .
   specs:
-    logstash-output-courier (1.8.4)
-      log-courier (= 1.8.3)
+    logstash-output-courier (1.8.4.pre.1.pre.g45888c8)
+      log-courier (~> 1.9)
       logstash-core (>= 1.4, < 3)
 
 GEM
@@ -24,13 +24,13 @@ GEM
     filesize (0.0.4)
     gems (0.8.3)
     i18n (0.6.9)
-    jrjackson (0.3.6)
+    jrjackson (0.3.7)
     jruby-openssl (0.9.12-java)
-    log-courier (1.8.3)
+    log-courier (1.9.0)
       cabin (~> 0.6)
       ffi-rzmq (~> 2.0)
       multi_json (~> 1.10)
-    logstash-core (1.5.5-java)
+    logstash-core (2.0.0-java)
       cabin (~> 0.7.0)
       clamp (~> 0.6.5)
       concurrent-ruby (~> 0.9.1)

lib/logstash/outputs/courier.rb

@@ -66,14 +66,21 @@ def register
 
       def receive(event)
         return unless output?(event)
-        if event == LogStash::SHUTDOWN
-          @client.shutdown
-          finished
-          return
-        end
         @client.publish event.to_hash
       end
 
+      # Logstash < 2.0.0 shutdown
+      def teardown
+        close
+      end
+
+      # Logstash >= 2.0.0 shutdown
+      def close
+        @client.shutdown
+        finished
+        nil
+      end
+
       private
 
       def options

logstash-output-courier.gemspec

@@ -28,5 +28,5 @@ Gem::Specification.new do |gem|
   gem.metadata = { 'logstash_plugin' => 'true', 'logstash_group' => 'output' }
 
   gem.add_runtime_dependency 'logstash-core', '>= 1.4', '< 3'
-  gem.add_runtime_dependency 'log-courier', '= 1.8.3'
+  gem.add_runtime_dependency 'log-courier', '~> 1.9'
 end

version.txt

@@ -1 +1 @@
-1.8.4
+1.9.0