Class: Roast::Workflow::SqliteStateRepository

Inherits:
StateRepository show all
Defined in:
lib/roast/workflow/sqlite_state_repository.rb

Overview

SQLite-based implementation of StateRepository Provides structured, queryable session storage with better performance

Constant Summary collapse

DEFAULT_DB_PATH = 
File.expand_path("~/.roast/sessions.db")

Instance Method Summary collapse

Constructor Details

#initialize(db_path: nil, session_manager: SessionManager.new) ⇒ SqliteStateRepository

Returns a new instance of SqliteStateRepository.



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 12

def initialize(db_path: nil, session_manager: SessionManager.new)
  super()

  # Lazy load sqlite3 only when actually using SQLite storage
  begin
    require "sqlite3"
  rescue LoadError
    raise LoadError, "SQLite storage requires the 'sqlite3' gem. Please add it to your Gemfile or install it: gem install sqlite3"
  end

  @db_path = db_path || ENV["ROAST_SESSIONS_DB"] || DEFAULT_DB_PATH
  @session_manager = session_manager
  ensure_database
end

Instance Method Details

#add_event(workflow_path, session_id, event_name, event_data = nil) ⇒ Object 



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 180

def add_event(workflow_path, session_id, event_name, event_data = nil)
  # Find the session if session_id not provided
  unless session_id
    workflow_name = File.basename(File.dirname(workflow_path))
    result = @db.execute("      SELECT id FROM sessions\n      WHERE workflow_name = ? AND status = ?\n      ORDER BY created_at DESC\n      LIMIT 1\n    SQL\n\n    raise \"No waiting session found for workflow: \#{workflow_name}\" if result.empty?\n\n    session_id = result[0][0]\n  end\n\n  # Add the event\n  @db.execute(<<~SQL, [session_id, event_name, event_data&.to_json])\n    INSERT INTO session_events (session_id, event_name, event_data)\n    VALUES (?, ?, ?)\n  SQL\n\n  # Update session status\n  @db.execute(<<~SQL, [session_id])\n    UPDATE sessions\#{\" \"}\n    SET status = 'running', updated_at = CURRENT_TIMESTAMP\n    WHERE id = ?\n  SQL\n\n  session_id\nend\n", [workflow_name, "waiting"])

#cleanup_old_sessions(older_than) ⇒ Object 



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 171

def cleanup_old_sessions(older_than)
  count = @db.changes
  @db.execute("    DELETE FROM sessions\n    WHERE created_at < datetime('now', ?)\n  SQL\n  @db.changes - count\nend\n", ["-#{older_than}"])

#get_session_details(session_id) ⇒ Object 



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 143

def get_session_details(session_id)
  session = @db.execute("    SELECT * FROM sessions WHERE id = ?\n  SQL\n\n  return unless session\n\n  states = @db.execute(<<~SQL, [session_id])\n    SELECT step_index, step_name, created_at\n    FROM session_states\n    WHERE session_id = ?\n    ORDER BY step_index\n  SQL\n\n  events = @db.execute(<<~SQL, [session_id])\n    SELECT event_name, event_data, received_at\n    FROM session_events\n    WHERE session_id = ?\n    ORDER BY received_at\n  SQL\n\n  {\n    session: session,\n    states: states,\n    events: events,\n  }\nend\n", [session_id]).first

#list_sessions(status: nil, workflow_name: nil, older_than: nil, limit: 100) ⇒ Object

Additional query methods for the new capabilities



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 112

def list_sessions(status: nil, workflow_name: nil, older_than: nil, limit: 100)
  conditions = []
  params = []

  if status
    conditions << "status = ?"
    params << status
  end

  if workflow_name
    conditions << "workflow_name = ?"
    params << workflow_name
  end

  if older_than
    conditions << "created_at < datetime('now', ?)"
    params << "-#{older_than}"
  end

  where_clause = conditions.empty? ? "" : "WHERE #{conditions.join(" AND ")}"

  @db.execute("    SELECT id, workflow_name, workflow_path, status, current_step_index,\#{\" \"}\n           created_at, updated_at\n    FROM sessions\n    \#{where_clause}\n    ORDER BY created_at DESC\n    LIMIT \#{limit}\n  SQL\nend\n", params)

#load_state_before_step(workflow, step_name, timestamp: nil) ⇒ Object 



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 47

def load_state_before_step(workflow, step_name, timestamp: nil)
  session_id = find_session_id(workflow, timestamp)
  return false unless session_id

  # Find the state before the target step
  result = @db.execute("    SELECT state_data, step_name\n    FROM session_states\n    WHERE session_id = ?\n      AND step_index < (\n        SELECT MIN(step_index)\#{\" \"}\n        FROM session_states\#{\" \"}\n        WHERE session_id = ? AND step_name = ?\n      )\n    ORDER BY step_index DESC\n    LIMIT 1\n  SQL\n\n  if result.empty?\n    # Try to find the latest state if target step doesn't exist\n    result = @db.execute(<<~SQL, [session_id])\n      SELECT state_data, step_name\n      FROM session_states\n      WHERE session_id = ?\n      ORDER BY step_index DESC\n      LIMIT 1\n    SQL\n\n    if result.empty?\n      $stderr.puts \"No state found for session\"\n      return false\n    end\n  end\n\n  state_data = JSON.parse(result[0][0], symbolize_names: true)\n  loaded_step = result[0][1]\n  $stderr.puts \"Found state from step: \#{loaded_step} (will replay from here to \#{step_name})\"\n\n  # If no timestamp provided and workflow has no session, create new session and copy states\n  if !timestamp && workflow.session_timestamp.nil?\n    copy_states_to_new_session(workflow, session_id, step_name)\n  end\n\n  state_data\nend\n", [session_id, step_name])

#save_final_output(workflow, output_content) ⇒ Object 



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 93

def save_final_output(workflow, output_content)
  return if output_content.empty?

  session_id = ensure_session(workflow)

  @db.execute("    UPDATE sessions\#{\" \"}\n    SET final_output = ?, status = 'completed', updated_at = CURRENT_TIMESTAMP\n    WHERE id = ?\n  SQL\n\n  session_id\nrescue => e\n  $stderr.puts \"Failed to save final output: \#{e.message}\"\n  nil\nend\n", [output_content, session_id])

#save_state(workflow, step_name, state_data) ⇒ Object 



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# File 'lib/roast/workflow/sqlite_state_repository.rb', line 27

def save_state(workflow, step_name, state_data)
  workflow.session_timestamp ||= @session_manager.create_new_session(workflow.object_id)

  session_id = ensure_session(workflow)

  @db.execute("    INSERT INTO session_states (session_id, step_index, step_name, state_data)\n    VALUES (?, ?, ?, ?)\n  SQL\n\n  # Update session's current step\n  @db.execute(<<~SQL, [state_data[:order], session_id])\n    UPDATE sessions\#{\" \"}\n    SET current_step_index = ?, updated_at = CURRENT_TIMESTAMP\n    WHERE id = ?\n  SQL\nrescue => e\n  $stderr.puts \"Failed to save state for step \#{step_name}: \#{e.message}\"\nend\n", [session_id, state_data[:order], step_name, state_data.to_json])