Class: Ask::Agent::Middleware::LogCalls

Inherits:
Base
  • Object
show all
Defined in:
lib/ask/agent/middleware/log_calls.rb

Overview

Logs LLM provider calls — request details, duration, token usage, and errors.

Uses a configurable logger (defaults to $stdout via Ruby's Logger). Each call is logged at INFO level on success, WARN level on failure.

Examples:

pipeline.use :log_calls, logger: Rails.logger

Instance Method Summary collapse

Constructor Details

#initialize(logger: nil) ⇒ LogCalls

Returns a new instance of LogCalls.



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# File 'lib/ask/agent/middleware/log_calls.rb', line 14

def initialize(logger: nil)
  @logger = logger || default_logger
end

Instance Method Details

#around_request(provider, request) ⇒ Object 



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# File 'lib/ask/agent/middleware/log_calls.rb', line 18

def around_request(provider, request)
  model = request[:model]
  tool_count = request[:tools]&.length.to_i
  msg_count = request[:messages]&.length.to_i

  @logger.info("[ask-agent] LLM call starting — model=#{model} tools=#{tool_count} messages=#{msg_count}")

  start = Process.clock_gettime(Process::CLOCK_MONOTONIC)

  begin
    result = yield

    elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start

    if result.respond_to?(:accumulated_usage)
      usage = result.accumulated_usage
      tokens = "#{usage[:input_tokens] || '?'}i / #{usage[:output_tokens] || '?'}o"
      @logger.info("[ask-agent] LLM call completed — model=#{model} duration=#{elapsed.round(3)}s tokens=#{tokens}")
    elsif result.respond_to?(:content)
      @logger.info("[ask-agent] LLM call completed — model=#{model} duration=#{elapsed.round(3)}s content_length=#{result.content.to_s.length}")
    else
      @logger.info("[ask-agent] LLM call completed — model=#{model} duration=#{elapsed.round(3)}s")
    end

    result
  rescue StandardError => e
    elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start
    @logger.warn("[ask-agent] LLM call failed — model=#{model} duration=#{elapsed.round(3)}s error=#{e.class}(#{e.message})")
    raise
  end
end