Class: Aidp::Harness::ErrorHandler

Inherits:
Object
  • Object
show all
Includes:
DebugMixin
Defined in:
lib/aidp/harness/error_handler.rb

Overview

Handles error recovery, retry strategies, and fallback mechanisms

Defined Under Namespace

Classes: BackoffCalculator, ErrorClassifier, RecoveryPlanner, Sleeper

Constant Summary

Constants included from DebugMixin

DebugMixin::DEBUG_BASIC, DebugMixin::DEBUG_OFF, DebugMixin::DEBUG_VERBOSE

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from DebugMixin

#debug_basic?, #debug_command, #debug_enabled?, #debug_error, #debug_execute_command, #debug_level, #debug_log, #debug_logger, #debug_provider, #debug_step, #debug_timing, #debug_verbose?, included, shared_logger

Constructor Details

#initialize(provider_manager, configuration, metrics_manager = nil, sleeper: nil) ⇒ ErrorHandler

Returns a new instance of ErrorHandler.

Parameters:

  • sleeper (#sleep) (defaults to: nil) —

    object responding to sleep(seconds); injectable for tests



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# File 'lib/aidp/harness/error_handler.rb', line 26

def initialize(provider_manager, configuration, metrics_manager = nil, sleeper: nil)
  @provider_manager = provider_manager
  @configuration = configuration
  @metrics_manager = metrics_manager
  @sleeper = sleeper || Sleeper.new
  @retry_strategies = {}
  @retry_counts = {}
  @error_history = []
  @circuit_breakers = {}
  @backoff_calculator = BackoffCalculator.new
  @error_classifier = ErrorClassifier.new
  @recovery_planner = RecoveryPlanner.new
  initialize_retry_strategies
end

Instance Attribute Details

#backoff_calculator ⇒ Object (readonly)

Expose internal components for testability



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# File 'lib/aidp/harness/error_handler.rb', line 16

def backoff_calculator
  @backoff_calculator
end

#error_classifier ⇒ Object (readonly)

Expose internal components for testability



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# File 'lib/aidp/harness/error_handler.rb', line 16

def error_classifier
  @error_classifier
end

#recovery_planner ⇒ Object (readonly)

Expose internal components for testability



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# File 'lib/aidp/harness/error_handler.rb', line 16

def recovery_planner
  @recovery_planner
end

#retry_strategies ⇒ Object (readonly)

Expose internal components for testability



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# File 'lib/aidp/harness/error_handler.rb', line 16

def retry_strategies
  @retry_strategies
end

Instance Method Details

#attempt_recovery(error_info, context = {}) ⇒ Object

Attempt recovery when retries are exhausted or not applicable



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# File 'lib/aidp/harness/error_handler.rb', line 228

def attempt_recovery(error_info, context = {})
  recovery_plan = @recovery_planner.create_recovery_plan(error_info, context)

  case recovery_plan[:action]
  when :switch_provider
    attempt_provider_switch(error_info, recovery_plan)
  when :switch_model
    attempt_model_switch(error_info, recovery_plan)
  when :circuit_breaker
    open_circuit_breaker(error_info, recovery_plan)
  when :escalate
    escalate_error(error_info, recovery_plan)
  when :abort
    abort_execution(error_info, recovery_plan)
  else
    {
      success: false,
      action: :unknown_recovery,
      error: "Unknown recovery action: #{recovery_plan[:action]}"
    }
  end
end

#circuit_breaker_status ⇒ Object

Get circuit breaker status



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# File 'lib/aidp/harness/error_handler.rb', line 324

def circuit_breaker_status
  @circuit_breakers.transform_values do |cb|
    {
      open: cb[:open],
      opened_at: cb[:opened_at],
      failure_count: cb[:failure_count],
      threshold: cb[:threshold]
    }
  end
end

#clear_error_history ⇒ Object

Clear error history



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# File 'lib/aidp/harness/error_handler.rb', line 319

def clear_error_history
  @error_history.clear
end

#error_history(time_range = nil) ⇒ Object

Get error history



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# File 'lib/aidp/harness/error_handler.rb', line 310

def error_history(time_range = nil)
  if time_range
    @error_history.select { |e| time_range.include?(e[:timestamp]) }
  else
    @error_history
  end
end

#error_stats ⇒ Object

Get error statistics



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# File 'lib/aidp/harness/error_handler.rb', line 42

def error_stats
  {
    total_errors: @error_history.size,
    error_types: @error_history.group_by { |e| e[:error_type] }.transform_values(&:size),
    recent_errors: @error_history.last(10),
    retry_counts: @retry_counts.dup,
    circuit_breaker_states: @circuit_breakers.transform_values { |cb| cb[:state] }
  }
end

#execute_retry(error_info, strategy, context = {}) ⇒ Object

Execute a retry with the given strategy



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# File 'lib/aidp/harness/error_handler.rb', line 182

def execute_retry(error_info, strategy, context = {})
  provider = error_info[:provider]
  model = error_info[:model]
  error_type = error_info[:error_type]

  # Increment retry count
  retry_key = "#{provider}:#{model}:#{error_type}"
  @retry_counts[retry_key] ||= 0
  @retry_counts[retry_key] += 1

  # Check if we've exceeded max retries
  if @retry_counts[retry_key] > strategy[:max_retries]
    return {
      success: false,
      action: :exhausted_retries,
      error: "Max retries exceeded for #{error_type}",
      retry_count: @retry_counts[retry_key],
      next_action: :fallback
    }
  end

  # Calculate backoff delay
  delay = @backoff_calculator.calculate_delay(
    @retry_counts[retry_key],
    strategy[:backoff_strategy],
    strategy[:base_delay],
    strategy[:max_delay]
  )

  # Wait for backoff delay
  @sleeper.sleep(delay) if delay > 0

  # Execute the retry
  retry_result = execute_retry_attempt(error_info, strategy, context)

  # Update retry result with metadata
  retry_result.merge!(
    retry_count: @retry_counts[retry_key],
    delay: delay,
    strategy: strategy[:name]
  )

  retry_result
end

#execute_with_retry(&block) ⇒ Object

Execute a block with retry logic



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# File 'lib/aidp/harness/error_handler.rb', line 104

def execute_with_retry(&block)
  providers_tried = []

  loop do
    max_attempts = @configuration.max_retries + 1
    attempt = 0

    begin
      attempt += 1
      return yield
    rescue Aidp::Errors::ConfigurationError
      # Configuration errors should crash immediately (crash-early principle)
      # Re-raise without catching
      raise
    rescue => error
      current_provider = current_provider_safely

      if attempt < max_attempts
        error_info = {
          error: error,
          provider: current_provider,
          model: current_model_safely,
          error_type: @error_classifier.classify_error(error)
        }

        strategy = retry_strategy(error_info[:error_type])
        if should_retry?(error_info, strategy)
          delay = @backoff_calculator.calculate_delay(attempt, strategy[:backoff_strategy] || :exponential, 1, 10)
          debug_log("🔁 Retry attempt #{attempt} for #{current_provider}", level: :info, data: {delay: delay, error_type: error_info[:error_type]})
          @sleeper.sleep(delay) if delay > 0
          retry
        end
      end

      # Provider exhausted – attempt recovery (may switch provider)
      debug_log("🚫 Exhausted retries for provider, attempting recovery", level: :warn, data: {provider: current_provider, attempt: attempt, max_attempts: max_attempts})
      handle_error(error, {
        provider: current_provider,
        model: current_model_safely,
        exhausted_retries: true
      })

      new_provider = current_provider_safely
      if new_provider != current_provider && !providers_tried.include?(new_provider)
        providers_tried << current_provider
        # Reset retry counts for the new provider
        begin
          reset_retry_counts(new_provider)
        rescue => e
          debug_log("⚠️ Failed to reset retry counts for new provider", level: :warn, data: {error: e.message})
        end
        debug_log("🔀 Switched provider after failure – re-executing block", level: :info, data: {from: current_provider, to: new_provider})
        # Start retry loop fresh for new provider
        next
      end

      # No new provider (or already tried) – return structured failure
      debug_log("❌ No fallback provider available or all tried", level: :error, data: {providers_tried: providers_tried})
      begin
        if @provider_manager.respond_to?(:mark_provider_failure_exhausted)
          @provider_manager.mark_provider_failure_exhausted(current_provider)
          debug_log("🛑 Marked provider #{current_provider} unhealthy due to exhausted retries", level: :warn)
        end
      rescue => e
        debug_log("⚠️ Failed to mark provider failure-exhausted", level: :warn, data: {error: e.message})
      end
      return {
        status: "failed",
        error: error,
        message: error.message,
        provider: current_provider,
        providers_tried: providers_tried.dup
      }
    end
  end
end

#handle_error(error, context = {}) ⇒ Object

Main entry point for error handling



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# File 'lib/aidp/harness/error_handler.rb', line 53

def handle_error(error, context = {})
  error_info = @error_classifier.classify_error(error, context)

  # Debug logging
  debug_error(error, context)
  debug_log("🔧 ErrorHandler: Processing error", level: :info, data: {
    error_type: error_info[:error_type],
    provider: error_info[:provider],
    model: error_info[:model]
  })

  # Record error in metrics if available
  @metrics_manager&.record_error(error_info[:provider], error_info[:model], error_info)

  # Add to error history
  @error_history << error_info

  # Get retry strategy for this error type
  strategy = retry_strategy(error_info[:error_type])

  # Check if we should retry
  if should_retry?(error_info, strategy)
    debug_log("🔄 ErrorHandler: Attempting retry", level: :info, data: {
      strategy: strategy[:name],
      max_retries: strategy[:max_retries]
    })
    execute_retry(error_info, strategy, context)

  else
    # No retry, attempt recovery
    debug_log("🚨 ErrorHandler: No retry, attempting recovery", level: :warn, data: {
      error_type: error_info[:error_type],
      reason: "Retry not applicable or exhausted"
    })
    if error_info[:error_type].to_sym == :auth_expired
      # Mark provider unhealthy to avoid immediate re-selection
      begin
        if @provider_manager.respond_to?(:mark_provider_auth_failure)
          @provider_manager.mark_provider_auth_failure(error_info[:provider])
          debug_log("🔐 Marked provider #{error_info[:provider]} unhealthy due to auth error", level: :warn)
        end
      rescue => e
        debug_log("⚠️ Failed to mark provider unhealthy after auth error", level: :warn, data: {error: e.message})
      end
    end
    attempt_recovery(error_info, context)

  end
end

#max_attempts ⇒ Object

Get maximum retry attempts



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# File 'lib/aidp/harness/error_handler.rb', line 257

def max_attempts
  @configuration.respond_to?(:max_retries) ? @configuration.max_retries : 3
end

#reset_all_circuit_breakers ⇒ Object

Reset all circuit breakers



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# File 'lib/aidp/harness/error_handler.rb', line 342

def reset_all_circuit_breakers
  @circuit_breakers.clear
end

#reset_circuit_breaker(provider, model = nil) ⇒ Object

Reset circuit breaker



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# File 'lib/aidp/harness/error_handler.rb', line 336

def reset_circuit_breaker(provider, model = nil)
  key = model ? "#{provider}:#{model}" : provider
  @circuit_breakers.delete(key)
end

#reset_retry_counts(provider, model = nil) ⇒ Object

Reset retry counts for a specific provider/model combination



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# File 'lib/aidp/harness/error_handler.rb', line 277

def reset_retry_counts(provider, model = nil)
  keys_to_reset = if model
    # Reset specific model
    @retry_counts.keys.select { |k| k.start_with?("#{provider}:#{model}:") }
  else
    # Reset all models for provider
    @retry_counts.keys.select { |k| k.start_with?("#{provider}:") }
  end

  keys_to_reset.each { |key| @retry_counts.delete(key) }
end

#retry_status(provider, model = nil) ⇒ Object

Get retry status for a provider/model



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# File 'lib/aidp/harness/error_handler.rb', line 290

def retry_status(provider, model = nil)
  keys = if model
    @retry_counts.keys.select { |k| k.start_with?("#{provider}:#{model}:") }
  else
    @retry_counts.keys.select { |k| k.start_with?("#{provider}:") }
  end

  status = {}
  keys.each do |key|
    error_type = key.split(":").last
    status[error_type] = {
      retry_count: @retry_counts[key],
      max_retries: retry_strategy(error_type.to_sym)[:max_retries]
    }
  end

  status
end

#retry_strategy(error_type) ⇒ Object

Get retry strategy for error type



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# File 'lib/aidp/harness/error_handler.rb', line 252

def retry_strategy(error_type)
  @retry_strategies[error_type] || @retry_strategies[:default]
end

#should_retry?(error_info, strategy) ⇒ Boolean

Check if we should retry based on error type and strategy

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/error_handler.rb', line 262

def should_retry?(error_info, strategy)
  return false unless strategy[:enabled]

  # Use ErrorTaxonomy to determine if error is retryable
  error_type = error_info[:error_type]
  return false unless Aidp::Providers::ErrorTaxonomy.retryable?(error_type)

  # Check circuit breaker
  circuit_breaker_key = "#{error_info[:provider]}:#{error_info[:model]}"
  return false if circuit_breaker_open?(circuit_breaker_key)

  true
end