Ember.Instrumentation Class
The purpose of the Ember Instrumentation module is to provide efficient, general-purpose instrumentation for Ember.
Subscribe to a listener by using Ember.subscribe
:
Ember.subscribe("render", {
before(name, timestamp, payload) {
},
after(name, timestamp, payload) {
}
});
If you return a value from the before
callback, that same
value will be passed as a fourth parameter to the after
callback.
Instrument a block of code by using Ember.instrument
:
Ember.instrument("render.handlebars", payload, function() {
// rendering logic
}, binding);
Event names passed to Ember.instrument
are namespaced
by periods, from more general to more specific. Subscribers
can listen for events by whatever level of granularity they
are interested in.
In the above example, the event is render.handlebars
,
and the subscriber listened for all events beginning with
render
. It would receive callbacks for events named
render
, render.handlebars
, render.container
, or
even render.handlebars.layout
.
Item Index
Methods
Methods
instrument
-
[name]
-
_payload
-
callback
-
binding
Notifies event's subscribers, calls before
and after
hooks.
reset
()
private
Resets Ember.Instrumentation
by flushing list of subscribers.
subscribe
-
[pattern]
-
[object]
Subscribes to a particular event or instrumented block of code.
Parameters:
-
[pattern]
String optionalNamespaced event name.
-
[object]
Object optionalBefore and After hooks.
Returns:
unsubscribe
-
[subscriber]
Unsubscribes from a particular event or instrumented block of code.
Parameters:
-
[subscriber]
Object optional