Class: BreakerMachines::Registry

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/breaker_machines/registry.rb

Overview

Global registry for tracking all circuit breaker instances

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Registry

Returns a new instance of Registry.



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# File 'lib/breaker_machines/registry.rb', line 11

def initialize
  @circuits = Concurrent::Map.new
  @named_circuits = Concurrent::Map.new # For dynamic circuits by name
  @mutex = Mutex.new
  @registration_count = 0
  @cleanup_interval = 100 # Clean up every N registrations
end

Instance Method Details

#all_circuits ⇒ Object

Get all active circuits



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# File 'lib/breaker_machines/registry.rb', line 42

def all_circuits
  @mutex.synchronize do
    @circuits.values.map do |weak_ref|
      weak_ref.__getobj__
    rescue WeakRef::RefError
      nil
    end.compact
  end
end

#all_stats ⇒ Object

Get all stats with detailed metrics



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# File 'lib/breaker_machines/registry.rb', line 100

def all_stats
  circuits = all_circuits

  {
    summary: stats_summary,
    circuits: circuits.map { |c| c.stats.to_h },
    health: {
      open_count: circuits.count(&:open?),
      closed_count: circuits.count(&:closed?),
      half_open_count: circuits.count(&:half_open?),
      total_failures: circuits.sum { |c| c.stats.failure_count },
      total_successes: circuits.sum { |c| c.stats.success_count }
    }
  }
end

#cleanup_dead_references ⇒ Object

Clean up dead references (thread-safe)



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# File 'lib/breaker_machines/registry.rb', line 223

def cleanup_dead_references
  @mutex.synchronize do
    cleanup_dead_references_unsafe
  end
end

#cleanup_stale_dynamic_circuits(max_age_seconds = 3600) ⇒ Object

Cleanup stale dynamic circuits older than given age



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# File 'lib/breaker_machines/registry.rb', line 183

def cleanup_stale_dynamic_circuits(max_age_seconds = 3600)
  @mutex.synchronize do
    cutoff_time = Time.now - max_age_seconds
    stale_names = []

    @named_circuits.each_pair do |name, weak_ref|
      circuit = weak_ref.__getobj__
      # Check if circuit has a last_activity_time and it's stale
      if circuit.respond_to?(:last_activity_time) &&
         circuit.last_activity_time &&
         circuit.last_activity_time < cutoff_time
        stale_names << name
      end
    rescue WeakRef::RefError
      stale_names << name
    end

    stale_names.each do |name|
      weak_ref = @named_circuits.delete(name)
      begin
        circuit = weak_ref.__getobj__
        @circuits.delete(circuit) if circuit
      rescue WeakRef::RefError
        # Already gone
      end
    end

    stale_names.size
  end
end

#clear ⇒ Object

Clear all circuits (useful for testing)



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# File 'lib/breaker_machines/registry.rb', line 215

def clear
  @mutex.synchronize do
    @circuits.clear
    @named_circuits.clear
  end
end

#detailed_report ⇒ Object

Get detailed information for all circuits



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# File 'lib/breaker_machines/registry.rb', line 117

def detailed_report
  all_circuits.map(&:to_h)
end

#dynamic_circuit_names ⇒ Object

Get all dynamic circuit names



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# File 'lib/breaker_machines/registry.rb', line 169

def dynamic_circuit_names
  @mutex.synchronize do
    alive_names = []
    @named_circuits.each_pair do |name, weak_ref|
      weak_ref.__getobj__
      alive_names << name
    rescue WeakRef::RefError
      @named_circuits.delete(name)
    end
    alive_names
  end
end

#find(name) ⇒ Object

Find first circuit by name



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# File 'lib/breaker_machines/registry.rb', line 58

def find(name)
  find_by_name(name).first
end

#find_by_name(name) ⇒ Object

Find circuits by name



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# File 'lib/breaker_machines/registry.rb', line 53

def find_by_name(name)
  all_circuits.select { |circuit| circuit.name == name }
end

#force_close(name) ⇒ Object

Force close a circuit by name



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# File 'lib/breaker_machines/registry.rb', line 72

def force_close(name) # rubocop:disable Naming/PredicateMethod
  circuits = find_by_name(name)
  return false if circuits.empty?

  circuits.each(&:force_close)
  true
end

#force_open(name) ⇒ Object

Force open a circuit by name



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# File 'lib/breaker_machines/registry.rb', line 63

def force_open(name) # rubocop:disable Naming/PredicateMethod
  circuits = find_by_name(name)
  return false if circuits.empty?

  circuits.each(&:force_open)
  true
end

#get_or_create_dynamic_circuit(name, owner, config) ⇒ Object

Get or create a globally managed dynamic circuit



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# File 'lib/breaker_machines/registry.rb', line 122

def get_or_create_dynamic_circuit(name, owner, config)
  @mutex.synchronize do
    # Check if circuit already exists and is still alive
    if @named_circuits.key?(name)
      weak_ref = @named_circuits[name]
      begin
        existing_circuit = weak_ref.__getobj__
        return existing_circuit if existing_circuit
      rescue WeakRef::RefError
        # Circuit was garbage collected, remove the stale reference
        @named_circuits.delete(name)
      end
    end

    # Create new circuit with weak owner reference
    # Don't auto-register to avoid deadlock
    weak_owner = owner.is_a?(WeakRef) ? owner : WeakRef.new(owner)
    circuit_config = config.merge(owner: weak_owner, auto_register: false)
    new_circuit = Circuit.new(name, circuit_config)

    # Manually register the circuit (we're already in sync block)
    @circuits[new_circuit] = WeakRef.new(new_circuit)
    @named_circuits[name] = WeakRef.new(new_circuit)

    new_circuit
  end
end

#register(circuit) ⇒ Object

Register a circuit instance



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# File 'lib/breaker_machines/registry.rb', line 20

def register(circuit)
  @mutex.synchronize do
    # Use circuit object as key - Concurrent::Map handles object identity correctly
    @circuits[circuit] = WeakRef.new(circuit)

    # Periodic cleanup
    @registration_count += 1
    if @registration_count >= @cleanup_interval
      cleanup_dead_references_unsafe
      @registration_count = 0
    end
  end
end

#remove_dynamic_circuit(name) ⇒ Object

Remove a dynamic circuit by name



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# File 'lib/breaker_machines/registry.rb', line 151

def remove_dynamic_circuit(name)
  @mutex.synchronize do
    if @named_circuits.key?(name)
      weak_ref = @named_circuits.delete(name)
      begin
        circuit = weak_ref.__getobj__
        @circuits.delete(circuit) if circuit
        true
      rescue WeakRef::RefError
        false
      end
    else
      false
    end
  end
end

#reset(name) ⇒ Object

Reset a circuit by name



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# File 'lib/breaker_machines/registry.rb', line 81

def reset(name) # rubocop:disable Naming/PredicateMethod
  circuits = find_by_name(name)
  return false if circuits.empty?

  circuits.each(&:reset)
  true
end

#stats_summary ⇒ Object

Get summary statistics



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# File 'lib/breaker_machines/registry.rb', line 90

def stats_summary
  circuits = all_circuits
  {
    total: circuits.size,
    by_state: circuits.group_by(&:status_name).transform_values(&:count),
    by_name: circuits.group_by(&:name).transform_values(&:count)
  }
end

#unregister(circuit) ⇒ Object

Unregister a circuit instance



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# File 'lib/breaker_machines/registry.rb', line 35

def unregister(circuit)
  @mutex.synchronize do
    @circuits.delete(circuit)
  end
end