Class Aggregator

Class Documentation

class Aggregator

Aggregator processes /diagnostics, republishes on /diagnostics_agg.

Aggregator is a node that subscribes to /diagnostics, processes it and republishes aggregated data on /diagnostics_agg. The aggregator creates a series of analyzers according to the specifications of its private parameters. The aggregated diagnostics data is organized in a tree structure. For example: 

Input (status names):
  tilt_hokuyo_node: Frequency
  tilt_hokuyo_node: Connection
Output:
  /Robot
  /Robot/Sensors
  /Robot/Sensors/Tilt Hokuyo/Frequency
  /Robot/Sensors/Tilt Hokuyo/Connection
The analyzer should always output a DiagnosticStatus with the name of the prefix. Any other data output is up to the analyzer developer.

Analyzer’s are loaded by specifying the private parameters of the aggregator. 

base_path: My Robot
pub_rate: 1.0
other_as_errors: false
analyzers:
  sensors:
    type: GenericAnalyzer
    path: Tilt Hokuyo
    find_and_remove_prefix: tilt_hokuyo_node
  motors:
    type: PR2MotorsAnalyzer
  joints:
    type: PR2JointsAnalyzer
Each analyzer is created according to the “type” parameter in its namespace. Any other parameters in the namespace can by used to specify the analyzer. If any analyzer is not properly specified, or returns false on initialization, the aggregator will report the error and publish it in the aggregated output.

Public Functions

DIAGNOSTIC_AGGREGATOR_PUBLIC Aggregator()

Constructor initializes with main prefix (ex: ‘/Robot’)

virtual DIAGNOSTIC_AGGREGATOR_PUBLIC ~Aggregator()
DIAGNOSTIC_AGGREGATOR_PUBLIC void publishData ()

Processes, publishes data. Should be called at pub_rate.

DIAGNOSTIC_AGGREGATOR_PUBLIC rclcpp::Node::SharedPtr get_node () const