BaseTopic¶

class lsst.ts.salobj.topics.BaseTopic(*, salinfo, name, sal_prefix)¶

Base class for topics.

Parameters:	salinfo : `SalInfo` SAL component information name : `str` Topic name, without a “command_” or “logevent_” prefix. sal_prefix : `str` SAL topic prefix: one of “command_”, “logevent_” or “”
Raises:	RuntimeError If the topic cannot be constructed.
Attributes:	salinfo : `SalInfo` The `salinfo` constructor argument. name : `str` The `name` constructor argument. sal_name : `str` The topic name used by SAL. For example: “logevent_summaryState”. log : `logging.Logger` A logger. volatile : `bool` Is this topic volatile (does it want no historical data)? attr_name : `str` Name of topic attribute in `Controller` and `Remote`. For example: “evt_summaryState”. rev_code : `str` Revision hash code for the topic. This code changes whenever the schema for the topic changes, and it is part of the DDS topic name. For example: “90255bf1” dds_name : `str` Name of topic seen by DDS. For example: “Test_logevent_summaryState_90255bf1”.

Attributes Summary

`DataType`	The class of data for this topic.
`metadata`	Get topic metadata as a `TopicMetadata`, if available, else `None`.

Attributes Documentation

metadata¶: Get topic metadata as a TopicMetadata, if available, else None.