Class: ActiveRecord::ConnectionAdapters::MasterSlaveAdapter::CircuitBreaker

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/connection_adapters/master_slave_adapter/circuit_breaker.rb

Instance Method Summary collapse

Constructor Details

#initialize(logger = nil, failure_threshold = 5, timeout = 30) ⇒ CircuitBreaker

Returns a new instance of CircuitBreaker.



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# File 'lib/active_record/connection_adapters/master_slave_adapter/circuit_breaker.rb', line 5

def initialize(logger = nil, failure_threshold = 5, timeout = 30)
  @logger = logger
  @failure_count = 0
  @failure_threshold = failure_threshold
  @timeout = timeout
  @state = :closed
end

Instance Method Details

#fail! ⇒ Object 



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# File 'lib/active_record/connection_adapters/master_slave_adapter/circuit_breaker.rb', line 28

def fail!
  @failure_count += 1
  if !open? && @failure_count >= @failure_threshold
    @opened_at = Time.now
    change_state_to :open
  end
end

#success! ⇒ Object 



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# File 'lib/active_record/connection_adapters/master_slave_adapter/circuit_breaker.rb', line 21

def success!
  if !closed?
    @failure_count = 0
    change_state_to :closed
  end
end

#tripped? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/connection_adapters/master_slave_adapter/circuit_breaker.rb', line 13

def tripped?
  if open? && timeout_exceeded?
    change_state_to :half_open
  end

  open?
end