Add callback groups
Allow named collections of callbacks to be defined and used anywhere
callbacks are used.
Change-Id: I3224aa06b2250e9a055bc70d20c186caecd033af
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/src/example/example.yaml b/src/example/example.yaml
index 171aeaa..0f286dc 100644
--- a/src/example/example.yaml
+++ b/src/example/example.yaml
@@ -74,3 +74,22 @@
properties: example property group
severity: INFO
message: Hello world from PDM!
+
+- name: example callback group
+ description: >
+ 'Callbacks groups are simply named collections of other callbacks.
+ Configuration file directives can only refer to a single callback.
+ Through use of a group, these configuration file directives can
+ refer to more than one callback.
+
+ For example for a given event, one may wish to trace multiple
+ messages to the systemd journal. The journal callback does not
+ support tracing multiple messages. To do that, define a callback
+ group composed of multiple journal callbacks.
+
+ This example callback group only has one member. To add more, add
+ additional callbacks to the members element.'
+ class: callback
+ callback: group
+ members:
+ - example journal callback