qoSProfile QML Value Type

Message-based representation of ROS 2 Quality of Service settings Default values are kept in sync with RMW by integration test Note that SYSTEM_DEFAULT and BEST_AVAILABLE values cannot be an observed value, because they resolve concretely at runtime. More...

Properties

• deadline : duration
• depth : uint32_t
• durability : uint8_t
• history : uint8_t
• lifespan : duration
• liveliness : uint8_t
• livelinessLeaseDuration : duration
• reliability : uint8_t

Detailed Description

They are included here for completeness to match the data structures in RMW

qoSProfile is a structured value type usable in QML. It maps directly to the rosgraph_msgs::msg::QoSProfile ROS 2 message type.

Construct a qoSProfile in QML by assigning a JavaScript object whose keys are its component properties, or by setting those properties individually.

See also QoSProfilePublisher and QoSProfileSubscriber.

Property Documentation

deadline : duration

Deadline between messages (0 for no deadline)

depth : uint32_t

Depth of the message queue (only meaningful when history==KEEP_LAST)

durability : uint8_t

history : uint8_t

lifespan : duration

Lifespan of each message (0 for infinite)

liveliness : uint8_t

livelinessLeaseDuration : duration

Lease duration for liveliness (0 for infinite)

reliability : uint8_t