QualityOfService QML Type

QoS policy enums and ready-made profiles for QML. More...

• List of all members, including inherited members

Methods

• qualityOfService parametersDefault()
• qualityOfService sensorData()
• qualityOfService servicesDefault()
• qualityOfService systemDefault()
• qualityOfService transientLocal()

Detailed Description

A singleton companion to the qualityOfService value type. Use its enums to set individual policies (e.g. QualityOfService.DurabilityTransientLocal) and its factory methods for the standard ROS 2 profiles.

See also qualityOfService.

Method Documentation

qualityOfService parametersDefault()

Reliable, keep-last depth 1000, volatile — matches the parameter services.

qualityOfService sensorData()

Best-effort, keep-last depth 5, volatile — for high-rate sensor streams (scans, images) where the latest sample matters more than delivery.

qualityOfService servicesDefault()

Reliable, keep-last depth 10, volatile — the default for service exchanges.

qualityOfService systemDefault()

The RMW system-default QoS (the default for a freshly-constructed value).

qualityOfService transientLocal()

Reliable + transient-local (latched), keep-last depth 1 — the right default for one-shot latched topics such as maps and /tf_static, so a late subscriber still receives the last value.