Module: Subserver::Middleware

Defined in:

lib/subserver/middleware/chain.rb,
lib/subserver/middleware/active_record.rb

Overview

Middleware is code configured to run before/after a message is processed. It is patterned after Rack middleware.

To modify middleware for the server, just call with another block:

Subserver.configure do |config|

config.middleware do |chain|
  chain.add MyServerHook
  chain.remove ActiveRecord
end

end

To insert immediately preceding another entry:

Subserver.configure do |config|

config.middleware do |chain|
  chain.insert_before ActiveRecord, MyServerHook
end

end

To insert immediately after another entry:

Subserver.configure do |config|

config.middleware do |chain|
  chain.insert_after ActiveRecord, MyServerHook
end

end

This is an example of a minimal server middleware:

class MyServerHook

def call(subscriber_class, message)
  puts "Before work"
  yield
  puts "After work"
end

end

Defined Under Namespace

Classes: ActiveRecord, Chain, Entry