Class: KPM::NodesInfoController

Inherits:
EngineController show all
Includes:
ActionController::Live
Defined in:
app/controllers/kpm/nodes_info_controller.rb

Instance Method Summary collapse

Methods inherited from EngineController

#current_tenant_user, #get_layout, #options_for_klient

Instance Method Details

#index ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 10

def index
  @installing = !params[:i].blank?

  @nodes_info = ::KillBillClient::Model::NodesInfo.nodes_info(options_for_klient)

  # For convenience, put pure OSGI bundles at the bottom
  @nodes_info.each do |node_info|
    next if node_info.plugins_info.nil?

    node_info.plugins_info.sort! do |a, b|
      if osgi_bundle?(a) && !osgi_bundle?(b)
        1
      elsif !osgi_bundle?(a) && osgi_bundle?(b)
        -1
      else
        a.plugin_name <=> b.plugin_name
      end
    end
  end

  @kb_host = params[:kb_host] || KillBillClient::API.base_uri
  @last_event_id = params[:last_event_id]
end

#install_plugin ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 79

def install_plugin
  trigger_node_plugin_command('INSTALL_PLUGIN')
  redirect_to nodes_info_index_path(i: 1)
end

#refresh ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 34

def refresh
  response.headers['Content-Type'] = 'text/event-stream'

  last_event_id_ref = Concurrent::AtomicReference.new(request.headers['Last-Event-Id'] || params[:last_event_id])
  sse = nil
  sse_client = nil
  begin
    # Kaui -> Browser
    sse = ActionController::Live::SSE.new(response.stream, retry: 300, event: 'refresh')

    # Kill Bill -> Kaui
    sse_client = ::Killbill::KPM::KPMClient.stream_osgi_logs(sse, params[:kb_host], last_event_id_ref)

    i = 0
    # We force the browser to reconnect periodically (ensures clients don't block the server shutdown sequence)
    while i < 6 # 30s
      i += 1
      # Keep the thread alive (Kill Bill should send us a heartbeat as well though)
      # Note that we set the id as the last log id, so that we can easily resume
      sse.write('heartbeat', id: last_event_id_ref.get)
      sleep 5
    end
  rescue ActionController::Live::ClientDisconnected
    # ignored
  ensure
    begin
      begin
        sse_client&.close
      rescue StandardError
        # ignored
      end
      sse&.close
    ensure
      # Clear dead DB connections
      # Very lame, but I couldn't do better... Rails will checkout a DB connection
      # whenever a new Thread is spawn and ActiveRecord::Base.clear_active_connections!
      # didn't seem to do the trick: the number of active and dead connections kept growing:
      #     connections = ActiveRecord::Base.connection_pool.instance_eval { @connections }
      #     busy = connections.count { |c| c.in_use? }
      #     dead = connections.count { |c| c.in_use? && !c.owner.alive? }
      ActiveRecord::Base.connection_pool.reap
    end
  end
end

#restart_plugin ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 99

def restart_plugin
  trigger_node_plugin_command('RESTART_PLUGIN')
  head :ok
end

#start_plugin ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 89

def start_plugin
  trigger_node_plugin_command('START_PLUGIN')
  head :ok
end

#stop_plugin ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 94

def stop_plugin
  trigger_node_plugin_command('STOP_PLUGIN')
  head :ok
end

#uninstall_plugin ⇒ Object 



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# File 'app/controllers/kpm/nodes_info_controller.rb', line 84

def uninstall_plugin
  trigger_node_plugin_command('UNINSTALL_PLUGIN')
  head :ok
end