Class: Solidstats::LoadLensService

Inherits:
Object
  • Object
show all
Defined in:
app/services/solidstats/load_lens_service.rb

Overview

LoadLens - Development Performance Monitoring Service Parses Rails development logs to extract performance metrics

Constant Summary collapse

DATA_DIR = 
Rails.root.join("solidstats")
LOG_FILE = 
Rails.root.join("log", "development.log")
POSITION_FILE = 
DATA_DIR.join("last_position.txt")
CACHE_FILE = 
"loadlens.json"
SUMMARY_FILE = 
"summary.json"
RETENTION_DAYS = 
7
REQUEST_START_REGEX =

Regex patterns for parsing Rails development log

/Started\s+(\w+)\s+"([^"]+)"\s+for\s+[\d\.:]+\s+at\s+([\d\-\s:]+)/
CONTROLLER_ACTION_REGEX = 
/Processing\s+by\s+([^#]+)#(\w+)\s+as/
COMPLETED_REGEX =

Updated to capture all timing info from the completion line

/Completed\s+(\d+)\s+\w+\s+in\s+([\d\.]+)ms(?:\s+\(([^)]+)\))?/
VIEW_RENDERING_REGEX =

Separate patterns for extracting times from the completion line details

/Views:\s+([\d\.]+)ms/
ACTIVERECORD_REGEX = 
/ActiveRecord:\s+([\d\.]+)ms/

Class Method Summary collapse

Class Method Details

.get_performance_data ⇒ Object 



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# File 'app/services/solidstats/load_lens_service.rb', line 23

def self.get_performance_data
  cache_file_path = solidstats_cache_path(CACHE_FILE)

  if File.exist?(cache_file_path) && cache_fresh?(cache_file_path, 15.minutes)
    raw_data = JSON.parse(File.read(cache_file_path))
    deep_indifferent_access(raw_data)
  else
    scan_and_cache
  end
rescue JSON::ParserError, Errno::ENOENT
  Rails.logger.error("Error reading performance cache, regenerating...")
  scan_and_cache
end

.parse_log_and_save ⇒ Object 



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# File 'app/services/solidstats/load_lens_service.rb', line 56

def self.parse_log_and_save
  return unless Rails.env.development?
  return unless File.exist?(LOG_FILE)

  ensure_data_directory
  cleanup_old_files

  begin
    last_position = read_last_position
    processed_count = 0
    current_requests = []

    File.open(LOG_FILE, "r") do |file|
      file.seek(last_position)

      file.each_line do |line|
        process_line(line.strip, current_requests)
        update_last_position(file.pos)
      end
    end

    # Process any remaining incomplete requests
    current_requests.each do |req|
      if req[:completed]
        save_request(req)
        processed_count += 1
      end
    end

    Rails.logger.info("DevLogParser: Processed #{processed_count} requests")
    { success: true, processed: processed_count }
  rescue => e
    Rails.logger.error("DevLogParser: Failed to parse development log: #{e.message}")
    { success: false, error: e.message }
  end
end

.refresh_data ⇒ Object 



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# File 'app/services/solidstats/load_lens_service.rb', line 49

def self.refresh_data
  # Force refresh by removing cache and regenerating
  cache_file_path = solidstats_cache_path(CACHE_FILE)
  File.delete(cache_file_path) if File.exist?(cache_file_path)
  scan_and_cache
end

.scan_and_cache ⇒ Object 



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# File 'app/services/solidstats/load_lens_service.rb', line 37

def self.scan_and_cache
  performance_data = scan_development_log

  # Cache the performance data
  cache_performance_data(performance_data)

  # Update summary.json with performance monitoring card
  update_summary_json(performance_data)

  deep_indifferent_access(performance_data)
end