/** ******************** Member Functions ************************* */
public static ArrivalDepartureGenerator getInstance() {
// If the PredictionGenerator hasn't been created yet then do so now
if (singleton == null) {
singleton =
ClassInstantiator.instantiate(className.getValue(), ArrivalDepartureGenerator.class);
}
return singleton;
}
/**
* Initiates a real-time amigocloud feed. If there is a JSONException while starting connection
* then will try again every 10 seconds until successful.
*/
public void startRealtimeWebsockets() {
logger.info("Starting amigocloud AVL feed");
int numberOfExceptions = 0;
boolean exceptionOccurred = false;
do {
try {
// Actually make the connection
AmigoWebsockets socket =
new AmigoWebsockets(
userId.getValue(),
projectId.getValue(),
datasetId.getValue(),
feedUrl.toString(),
new MyAmigoWebsocketListener(this));
socket.connect();
exceptionOccurred = false;
} catch (JSONException e) {
++numberOfExceptions;
exceptionOccurred = true;
// If exception has occurred several times then send e-mail to
// indicate there is an ongoing problem
if (numberOfExceptions == 3) {
logger.error(
Markers.email(),
"For agencyId={} exception when starting up "
+ "AmigoCloudAvlModule. {}. numberOfExceptions={}",
AgencyConfig.getAgencyId(),
e.getMessage(),
numberOfExceptions,
e);
}
// Sleep 10 seconds before trying again
Time.sleep(10 * Time.MS_PER_SEC);
}
} while (exceptionOccurred);
}
/** For in case want to test a non-realtime amigocloud feed */
public void startNonRealtimeWebsockets() {
AmigoWebsockets socket =
new AmigoWebsockets(
userId.getValue(), feedUrl.toString(), new MyAmigoWebsocketListener(this));
socket.connect();
}
/** Returns URL to use */
@Override
protected String getUrl() {
return mbtaCommuterRailFeedUrl.getValue();
}