tree 41a478a82a9a224fc971f8f57a64fecca41bb269
parent ebabc0402df8fcd7ab658c6d8a11a8d4238d5aea
author Matthew Barth <msbarth@us.ibm.com> 1620939834 -0500
committer Matthew Barth <msbarth@us.ibm.com> 1623359217 -0500

control: Add signal triggers with propertiesChanged signals

Add signal trigger support to the available triggers and include the
ability to subscribe and handle propertiesChanged signals.

Subscribing to a signal involves creating the signal's match string and
packaging the signal data for when the signal is received. Since a
single signal could be configured to be used across multiple dbus
objects and/or actions, the signal package is added in a way that each
event configured for the signal is processed from the signal received.

Handling the propertiesChanged signal involves filtering for the
configured dbus property, updating the cached value of the property, and
then allowing the actions for that signal to be run.

Change-Id: I04bc163b65115d9bac30315f690db5fefca5bde4
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>