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[Telemetry] Subscribe from telemetry controller

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Initiate subscriptions from telemetry controller. Allows
plotting of streaming data from the WARP Server, WTD-644.
This commit is contained in:
Victor Woeltjen 2015-01-09 17:01:03 -08:00
parent 782edfc3b7
commit e3851c4e9c
1 changed files with 27 additions and 0 deletions
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27
platform/telemetry/src/TelemetryController.js
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@ -47,6 +47,9 @@ define(
// is being issued.
broadcasting: false,
// Active subscriptions
subscriptions: [],
// Used for getTelemetryObjects; a reference is
// stored so that this can be called in a watch
telemetryObjects: [],
@ -183,6 +186,25 @@ define(
}
}
// Subscribe to streaming telemetry updates
function subscribe(domainObject) {
var telemetryCapability =
domainObject.getCapability("telemetry");
return telemetryCapability.subscribe(function () {
requestTelemetryForId(
domainObject.getId(),
false
);
});
}
// Stop listening to active subscriptions
function unsubscribe() {
self.subscriptions.forEach(function (s) {
return s && s();
});
}
// Build response containers (as above) for all
// domain objects, and update some controller-internal
// state to support subsequent calls.
@ -205,6 +227,9 @@ define(
return self.response[id].metadata;
});
// Subscribe to all telemetry objects
self.subscriptions = domainObjects.map(subscribe);
// Issue a request for the new objects, if we
// know what our request looks like
if (self.request) {
@ -217,6 +242,7 @@ define(
// scope. This will be the domain object itself, or
// its telemetry delegates, or both.
function getTelemetryObjects(domainObject) {
unsubscribe();
promiseRelevantDomainObjects(domainObject)
.then(buildResponseContainers);
}
@ -241,6 +267,7 @@ define(
// Stop polling for changes
function deactivate() {
unsubscribe();
self.active = false;
}