/**
* The call() method that broadcast intents before the measurement starts and after the
* measurement finishes.
*/
@Override
public MeasurementResult[] call() throws MeasurementError {
MeasurementResult[] results = null;
PhoneUtils phoneUtils = PhoneUtils.getPhoneUtils();
try {
phoneUtils.acquireWakeLock();
broadcastMeasurementStart();
contextCollector.setInterval(realTask.getDescription().contextIntervalSec);
contextCollector.startCollector();
results = realTask.call();
ArrayList<HashMap<String, String>> contextResults = contextCollector.stopCollector();
for (MeasurementResult r : results) {
r.addContextResults(contextResults);
r.getDeviceProperty().dnResolvability = contextCollector.dnsConnectivity;
r.getDeviceProperty().ipConnectivity = contextCollector.ipConnectivity;
}
} catch (MeasurementError e) {
Logger.e("User measurement " + realTask.getDescriptor() + " has failed");
Logger.e(e.getMessage());
results = MeasurementResult.getFailureResult(realTask, e);
} catch (Exception e) {
Logger.e("User measurement " + realTask.getDescriptor() + " has failed");
Logger.e("Unexpected Exception: " + e.getMessage());
results = MeasurementResult.getFailureResult(realTask, e);
} finally {
broadcastMeasurementEnd(results);
MeasurementTask currentTask = scheduler.getCurrentTask();
if (currentTask != null && currentTask.equals(realTask)) {
scheduler.setCurrentTask(null);
}
phoneUtils.releaseWakeLock();
}
return results;
}
private MeasurementResult getFailureResult(MeasurementTask task, Throwable error) {
MeasurementResult result =
new MeasurementResult(
phoneUtils.getDeviceInfo().deviceId,
phoneUtils.getDeviceProperty(),
task.getType(),
System.currentTimeMillis() * 1000,
false,
task.measurementDesc);
result.addResult("error", error.toString() + "\n" + getStackTrace(error));
return result;
}
private void broadcastMeasurementEnd(MeasurementResult result) {
Intent intent = new Intent();
intent.setAction(UpdateIntent.MEASUREMENT_PROGRESS_UPDATE_ACTION);
intent.putExtra(UpdateIntent.TASK_PRIORITY_PAYLOAD, MeasurementTask.USER_PRIORITY);
// A progress value greater than max progress to indicate the termination of a measurement
intent.putExtra(UpdateIntent.PROGRESS_PAYLOAD, Config.MEASUREMENT_END_PROGRESS);
if (result != null) {
intent.putExtra(UpdateIntent.STRING_PAYLOAD, result.toString());
} else {
String errorString = "Measurement " + realTask.getDescriptor() + " has failed";
errorString += "\nTimestamp: " + Calendar.getInstance().getTime();
intent.putExtra(UpdateIntent.ERROR_STRING_PAYLOAD, errorString);
}
MeasurementScheduler.this.sendBroadcast(intent);
// Update the status bar once the user measurement finishes
updateStatus();
}
