Move to instance method and document usage

README.md

@@ -11,6 +11,27 @@ one of the most common jobs in a modern web application: Sending emails outside
 of the request-response cycle, so the user doesn't have to wait on it.
 
 
+## Usage
+
+Declare a job like so:
+
+```ruby
+class MyJob < ActiveJob::Base
+  def perform(record)
+    record.do_work
+  end
+end
+```
+
+Enqueue a job like so:
+
+```ruby
+MyJob.enqueue record
+```
+
+That's it!
+
+
 ## GlobalID support
 
 Active Job supports GlobalID serialization for parameters. This makes it possible
@@ -19,7 +40,7 @@ you then have to manually deserialize. Before, jobs would look like this:
 
 ```ruby
 class TrashableCleanupJob
-  def self.perfom(trashable_class, trashable_id, depth)
+  def perfom(trashable_class, trashable_id, depth)
     trashable = trashable_class.constantize.find(trashable_id)
     trashable.cleanup(depth)
   end
@@ -30,7 +51,7 @@ Now you can simply do:
 
 ```ruby
 class TrashableCleanupJob
-  def self.perfom(trashable, depth)
+  def perfom(trashable, depth)
     trashable.cleanup(depth)
   end
 end

lib/active_job/queue_adapters/delayed_job_adapter.rb

@@ -11,7 +11,7 @@ module ActiveJob
       
       class JobWrapper
         def perform(job, *args)
-          job.perform *Parameters.deserialize(args)
+          job.new.perform *Parameters.deserialize(args)
         end
       end
     end

lib/active_job/queue_adapters/inline_adapter.rb

@@ -3,7 +3,7 @@ module ActiveJob
     class InlineAdapter
       class << self
         def queue(job, *args)
-          job.perform *Parameters.deserialize(args)
+          job.new.perform *Parameters.deserialize(args)
         end
       end
     end

lib/active_job/queue_adapters/resque_adapter.rb

@@ -18,7 +18,7 @@ module ActiveJob
           end
 
           def perform(job_name, *args)
-            job_name.constantize.perform *Parameters.deserialize(args)
+            job_name.constantize.new.perform *Parameters.deserialize(args)
           end
         end
 

lib/active_job/queue_adapters/sidekiq_adapter.rb

@@ -13,7 +13,7 @@ module ActiveJob
         include Sidekiq::Worker
 
         def perform(job_name, *args)
-          job_name.constantize.perform *Parameters.deserialize(args)
+          job_name.constantize.new.perform *Parameters.deserialize(args)
         end
       end
     end

lib/active_job/queue_adapters/sucker_punch_adapter.rb

@@ -13,7 +13,7 @@ module ActiveJob
         include SuckerPunch::Job
 
         def perform(job_name, *args)
-          job_name.perform *Parameters.deserialize(args)
+          job_name.new.perform *Parameters.deserialize(args)
         end
       end
     end

test/jobs/gid_job.rb

@@ -1,5 +1,5 @@
 class GidJob < ActiveJob::Base
-  def self.perform(person)
+  def perform(person)
     $BUFFER << "Person with ID: #{person.id}"
   end
 end

test/jobs/hello_job.rb

@@ -1,5 +1,5 @@
 class HelloJob < ActiveJob::Base
-  def self.perform(greeter = "David")
+  def perform(greeter = "David")
     $BUFFER << "#{greeter} says hello"
   end
 end