Class: Pi::Browser::Taskbar::Rails::Broker::Runtime

Inherits:
Object
  • Object
show all
Defined in:
lib/pi/browser/taskbar/rails/broker.rb

Instance Method Summary collapse

Constructor Details

#initialize(project_root:, executable:, task_timeout: 1_800, abort_timeout: DEFAULT_ABORT_TIMEOUT, termination_timeout: DEFAULT_TERMINATION_TIMEOUT, max_restart_attempts: DEFAULT_RESTART_ATTEMPTS, restart_delay: DEFAULT_RESTART_DELAY) ⇒ Runtime

Returns a new instance of Runtime.



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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 103

def initialize(project_root:, executable:, task_timeout: 1_800,
  abort_timeout: DEFAULT_ABORT_TIMEOUT,
  termination_timeout: DEFAULT_TERMINATION_TIMEOUT,
  max_restart_attempts: DEFAULT_RESTART_ATTEMPTS,
  restart_delay: DEFAULT_RESTART_DELAY)
  @project_root = project_root
  @executable = executable
  @task_timeout = task_timeout
  @abort_timeout = abort_timeout
  @termination_timeout = termination_timeout
  @max_restart_attempts = max_restart_attempts
  @restart_delay = restart_delay
  @mutex = Mutex.new
  @write_mutex = Mutex.new
  @session_id = nil
  @model = nil
  @error = nil
  @task = nil
  @phase = "starting"
  @reset_condition = ConditionVariable.new
  @reset_result = nil
  @reset_recovering = false
  @restart_attempts = 0
  @closed = false
  start_pi
end

Instance Method Details

#cancel(id) ⇒ Object 



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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 169

def cancel(id)
  @mutex.synchronize do
    return [:not_found, snapshot_unlocked] unless @task && @task["id"] == id

    case @task["status"]
    when "running"
      @task["abort_command_id"] = "abort-#{@task["id"]}"
      write(type: "abort", id: @task["abort_command_id"])
      @task["status"] = "cancelling"
      @task["activity"] = "Stopping Pi"
      Thread.new do
        sleep @abort_timeout
        abort_timeout(id)
      end
      [:accepted, snapshot_unlocked]
    when "cancelling"
      [:accepted, snapshot_unlocked]
    when "cancelled"
      [:cancelled, snapshot_unlocked]
    else
      [:not_cancellable, snapshot_unlocked]
    end
  rescue IOError, SystemCallError
    restart_after_protocol_failure_unlocked(
      "Pi stopped unexpectedly", "Pi became unavailable before accepting cancellation"
    )
    [:unavailable, snapshot_unlocked]
  end
end

#close ⇒ Object 



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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 216

def close
  @mutex.synchronize do
    @closed = true
    stop_pi_unlocked
  end
rescue IOError, SystemCallError
  nil
end

#reset ⇒ Object 



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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 199

def reset
  @mutex.synchronize do
    return [:reset_while_busy, snapshot_unlocked] unless @phase == "ready"

    @phase = "resetting"
    @reset_result = nil
    @reset_command_id = "reset-#{SecureRandom.urlsafe_base64(18, false)}"
    begin
      write(type: "new_session", id: @reset_command_id)
    rescue IOError, SystemCallError
      recover_reset_unlocked
    end
    @reset_condition.wait(@mutex) while @reset_result.nil?
    [@reset_result, snapshot_unlocked]
  end
end

#snapshot ⇒ Object 



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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 130

def snapshot
  @mutex.synchronize { snapshot_unlocked }
end

#submit(value) ⇒ Object 



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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 138

def submit(value)
  task = Task.parse(value)
  @mutex.synchronize do
    return [:busy, snapshot_unlocked] if @phase == "busy"
    return [:unavailable, snapshot_unlocked] unless @phase == "ready"

    id = SecureRandom.urlsafe_base64(18, false)
    now = Time.now.utc.iso8601(6)
    @task = {
      "id" => id, "prompt" => task.prompt, "status" => "running", "output" => "",
      "output_truncated" => false, "activity" => "Starting Pi", "error" => nil,
      "started_at" => now, "finished_at" => nil, "command_id" => "task-#{id}",
      "prompt_accepted" => false, "pending_error" => nil
    }
    @phase = "busy"
    write(type: "prompt", id: @task["command_id"], message: task.pi_prompt)
    Thread.new do
      sleep @task_timeout
      timeout(id)
    end
    [:accepted, snapshot_unlocked]
  rescue IOError, SystemCallError
    restart_after_protocol_failure_unlocked(
      "Pi stopped unexpectedly", "Pi became unavailable before accepting the task"
    )
    [:unavailable, snapshot_unlocked]
  end
rescue Task::Invalid => error
  [:invalid, error.message]
end

#work_active? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pi/browser/taskbar/rails/broker.rb', line 134

def work_active?
  @mutex.synchronize { %w[starting busy resetting].include?(@phase) }
end