Module: RightSharding

Defined in:
lib/right_sharding/shard_handler.rb,
lib/right_sharding.rb,
lib/right_sharding/routing.rb,
lib/right_sharding/base_proxy.rb,
lib/right_sharding/user_api_proxy.rb,
lib/right_sharding/current_account.rb,
lib/right_sharding/instance_api_proxy.rb

Overview

-- Copyright (c) 2012 RightScale, Inc, All Rights Reserved Worldwide.

THIS PROGRAM IS CONFIDENTIAL AND PROPRIETARY TO RIGHTSCALE AND CONSTITUTES A VALUABLE TRADE SECRET. Any unauthorized use, reproduction, modification, or disclosure of this program is strictly prohibited. Any use of this program by an authorized licensee is strictly subject to the terms and conditions, including confidentiality obligations, set forth in the applicable License Agreement between RightScale, Inc. and the licensee. ++

Defined Under Namespace

Modules: Rack, Routing, ShardHandler

Class Method Summary collapse

Class Method Details

.activate(config, options = {}) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/right_sharding.rb', line 14

def self.activate(config, options = {})
  # Ensure that this super-important module attribute is set before any init code attempts to use it!
  RightSharding::Routing.skip_shard_routing_callback = options.delete(:skip_shard_routing_callback)

  # The library uses only the CurrentAccount middleware.
   = options.delete(:current_account_only)

  # Add middleware to update the global_session account based on received headers/params.
  # Must come after GlobalSession.
  config.middleware.insert_after ::Rack::MethodOverride, ::Rack::CurrentAccount, options

  unless 
    # Add the middleware to intercept the requests and reroute users to the appropriate shards
    # It must come after GlobalSession and CurrentAccount; GlobalSession will be used for the
    # legacy path.
    config.middleware.insert_after ::Rack::CurrentAccount, ::Rack::ShardRouting, options

    # Add the middleware to proxy the instance facing api to the appropriate shards
    config.middleware.insert_before ::Rack::ShardRouting, ::Rack::ShardInstanceApiProxy, options

    # This will proxy the specific accounts passed in the options variable.
    config.middleware.insert_after(::Rack::ShardInstanceApiProxy, ::Rack::ShardUserApiProxy, options)
  end
rescue NoMethodError => e
  raise NoMethodError, "GlobalSession must be used first."
end