Class: ThriftRack::Downgrade

Inherits:
Object
  • Object
show all
Defined in:
lib/thrift_rack/downgrade.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Downgrade

Returns a new instance of Downgrade.



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# File 'lib/thrift_rack/downgrade.rb', line 3

def initialize(app)
  @app = app
  @drop_percentage = 0
  @last_sync_drop_percentage_at = Time.at(0)
end

Class Method Details

.change_downgrade(drop_percentage) ⇒ Object 



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# File 'lib/thrift_rack/downgrade.rb', line 29

def change_downgrade(drop_percentage)
  ThriftRack.redis.set(downgrade_redis_key, drop_percentage)
end

.close_downgrade ⇒ Object 



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# File 'lib/thrift_rack/downgrade.rb', line 37

def close_downgrade
  ThriftRack.redis.del(downgrade_redis_key)
end

.current_drop_percentage ⇒ Object 



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# File 'lib/thrift_rack/downgrade.rb', line 33

def current_drop_percentage
  ThriftRack.redis.get(downgrade_redis_key).to_f
end

.downgrade_redis_key ⇒ Object 



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# File 'lib/thrift_rack/downgrade.rb', line 41

def downgrade_redis_key
  "thrift_rack:downgrade"
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/thrift_rack/downgrade.rb', line 9

def call(env)
  if rand(100) < drop_percentage
    [509, {}, ["Downgrading"]]
  else
    @app.call(env)
  end
end