Refactor to use Sidekiq.dump_json and Sidekiq.load_json

These methods perform MultiJson feature detection and can be removed
after this library's MultiJson dependency is upgraded to ~> 2.0.

lib/sidekiq.rb

@@ -82,4 +82,22 @@ module Sidekiq
     @server_chain
   end
 
+  def self.load_json(string, options={})
+    # Can't reliably detect whether MultiJson responds to load, since it's
+    # a reserved word. Use adapter as a proxy for new features.
+    if MultiJson.respond_to?(:adapter)
+      MultiJson.load(string, options)
+    else
+      MultiJson.decode(string, options)
+    end
+  end
+
+  def self.dump_json(object, options={})
+    if MultiJson.respond_to?(:dump)
+      MultiJson.dump(object, options)
+    else
+      MultiJson.encode(object, options)
+    end
+  end
+
 end

lib/sidekiq/client.rb

@@ -45,11 +45,7 @@ module Sidekiq
 
       pushed = false
       Sidekiq.client_middleware.invoke(worker_class, item, queue) do
-        payload = if MultiJson.respond_to?(:dump)
-          MultiJson.dump(item)
-        else
-          MultiJson.encode(item)
-        end
+        payload = Sidekiq.dump_json(item)
         Sidekiq.redis do |conn|
           _, pushed = conn.multi do
             conn.sadd('queues', queue)

lib/sidekiq/manager.rb

@@ -110,11 +110,7 @@ module Sidekiq
           processor = @ready.pop
           @in_progress[processor.object_id] = [msg, queue]
           @busy << processor
-          if MultiJson.respond_to?(:adapter)
-            processor.process!(MultiJson.load(msg), queue)
-          else
-            processor.process!(MultiJson.decode(msg), queue)
-          end
+          processor.process!(Sidekiq.load_json(msg), queue)
         end
       end
     end

lib/sidekiq/middleware/client/unique_jobs.rb

@@ -10,11 +10,7 @@ module Sidekiq
         def call(worker_class, item, queue)
           enabled = worker_class.get_sidekiq_options['unique']
           if enabled
-            payload_hash = if MultiJson.respond_to?(:dump)
-              Digest::MD5.hexdigest(MultiJson.dump(item))
-            else
-              Digest::MD5.hexdigest(MultiJson.encode(item))
-            end
+            payload_hash = Digest::MD5.hexdigest(Sidekiq.dump_json(item))
             unique = false
 
             Sidekiq.redis do |conn|

lib/sidekiq/middleware/server/failure_jobs.rb

@@ -16,11 +16,7 @@ module Sidekiq
             :worker => args[1]['class'],
             :queue => args[2]
           }
-          if MultiJson.respond_to?(:dump)
-            Sidekiq.redis {|conn| conn.rpush(:failed, MultiJson.dump(data)) }
-          else
-            Sidekiq.redis {|conn| conn.rpush(:failed, MultiJson.encode(data)) }
-          end
+          Sidekiq.redis {|conn| conn.rpush(:failed, Sidekiq.dump_json(data)) }
           raise
         end
       end

lib/sidekiq/middleware/server/retry_jobs.rb

@@ -46,11 +46,7 @@ module Sidekiq
             delay = DELAY.call(count)
             logger.debug { "Failure! Retry #{count} in #{delay} seconds" }
             retry_at = Time.now.to_f + delay
-            payload = if MultiJson.respond_to?(:dump)
-              MultiJson.dump(msg)
-            else
-              MultiJson.encode(msg)
-            end
+            payload = Sidekiq.dump_json(msg)
             Sidekiq.redis do |conn|
               conn.zadd('retry', retry_at.to_s, payload)
             end

lib/sidekiq/middleware/server/unique_jobs.rb

@@ -7,11 +7,7 @@ module Sidekiq
         def call(*args)
           yield
         ensure
-          json = if MultiJson.respond_to?(:dump)
-            MultiJson.dump(args[1])
-          else
-            MultiJson.encode(args[1])
-          end
+          json = Sidekiq.dump_json(args[1])
           hash = Digest::MD5.hexdigest(json)
           Sidekiq.redis {|conn| conn.del(hash) }
         end

lib/sidekiq/processor.rb

@@ -55,11 +55,7 @@ module Sidekiq
         conn.multi do
           conn.set("worker:#{self}:started", Time.now.to_s)
           hash = {:queue => queue, :payload => msg, :run_at => Time.now.strftime("%Y/%m/%d %H:%M:%S %Z")}
-          if MultiJson.respond_to?(:dump)
-            conn.set("worker:#{self}", MultiJson.dump(hash))
-          else
-            conn.set("worker:#{self}", MultiJson.encode(hash))
-          end
+          conn.set("worker:#{self}", Sidekiq.dump_json(hash))
         end
       end
 

lib/sidekiq/retry.rb

@@ -46,11 +46,7 @@ module Sidekiq
 
             messages.each do |message|
               logger.debug { "Retrying #{message}" }
-              msg = if MultiJson.respond_to?(:adapter)
-                MultiJson.load(message)
-              else
-                MultiJson.decode(message)
-              end
+              msg = Sidekiq.load_json(message)
               conn.rpush("queue:#{msg['queue']}", message)
             end
           end

lib/sidekiq/web.rb

@@ -52,13 +52,7 @@ module Sidekiq
           Sidekiq.redis do |conn|
             conn.smembers('workers').map do |w|
               msg = conn.get("worker:#{w}")
-              if msg
-                msg = if MultiJson.respond_to?(:adapter)
-                  MultiJson.load(msg)
-                else
-                  MultiJson.decode(msg)
-                end
-              end
+              msg = Sidekiq.load_json(msg) if msg
               [w, msg]
             end.sort { |x| x[1] ? -1 : 1 }
           end
@@ -80,11 +74,7 @@ module Sidekiq
       def retries
         Sidekiq.redis do |conn|
           results = conn.zrange('retry', 0, 25, :withscores => true)
-          if MultiJson.respond_to?(:adapter)
-            results.each_slice(2).map { |msg, score| [MultiJson.load(msg), Float(score)] }
-          else
-            results.each_slice(2).map { |msg, score| [MultiJson.decode(msg), Float(score)] }
-          end
+          results.each_slice(2).map { |msg, score| [Sidekiq.load_json(msg), Float(score)] }
         end
       end
 
@@ -99,11 +89,7 @@ module Sidekiq
       def retries_with_score(score)
         Sidekiq.redis do |conn|
           results = conn.zrangebyscore('retry', score, score)
-          if MultiJson.respond_to?(:adapter)
-            results.map { |msg| MultiJson.load(msg) }
-          else
-            results.map { |msg| MultiJson.decode(msg) }
-          end
+          results.map { |msg| Sidekiq.load_json(msg) }
         end
       end
 
@@ -138,11 +124,7 @@ module Sidekiq
     get "/queues/:name" do
       halt 404 unless params[:name]
       @name = params[:name]
-      if MultiJson.respond_to?(:adapter)
-        @messages = Sidekiq.redis {|conn| conn.lrange("queue:#{@name}", 0, 10) }.map { |str| MultiJson.load(str) }
-      else
-        @messages = Sidekiq.redis {|conn| conn.lrange("queue:#{@name}", 0, 10) }.map { |str| MultiJson.decode(str) }
-      end
+      @messages = Sidekiq.redis {|conn| conn.lrange("queue:#{@name}", 0, 10) }.map { |str| Sidekiq.load_json(str) }
       slim :queue
     end
 
@@ -160,11 +142,7 @@ module Sidekiq
           results = conn.zrangebyscore('retry', score, score)
           conn.zremrangebyscore('retry', score, score)
           results.map do |message|
-            msg = if MultiJson.respond_to?(:adapter)
-              MultiJson.load(message)
-            else
-              MultiJson.decode(message)
-            end
+            msg = Sidekiq.load_json(message)
             conn.rpush("queue:#{msg['queue']}", message)
           end
         end

test/test_retry.rb

@@ -82,11 +82,7 @@ class TestRetry < MiniTest::Unit::TestCase
     end
 
     it 'should poll like a bad mother...SHUT YO MOUTH' do
-      fake_msg = if MultiJson.respond_to?(:dump)
-        MultiJson.dump({ 'class' => 'Bob', 'args' => [1,2], 'queue' => 'someq' })
-      else
-        MultiJson.encode({ 'class' => 'Bob', 'args' => [1,2], 'queue' => 'someq' })
-      end
+      fake_msg = Sidekiq.dump_json({ 'class' => 'Bob', 'args' => [1,2], 'queue' => 'someq' })
       @redis.expect :multi, [[fake_msg], 1], []
       @redis.expect :rpush, 1, ['queue:someq', fake_msg]