@Override
public NotificationResult findNotificationsAfterEpoch(
CallingContext context, Long lastEpochSeen) {
NotificationResult result = new NotificationResult(currentEpoch);
for (long epoch = lastEpochSeen; epoch < currentEpoch; epoch++) {
NotificationInfo info = notifications.get(epoch);
String originKernelId = info.getKernelId();
// prevent kernel from receiving notifications from itself, which can cause race conditions
if (originKernelId != null && originKernelId.equals(context.getContext())) {
continue;
}
result.addId(info.getId());
}
return result;
}
@Override
public String publishNotification(
CallingContext context, String referenceId, String content, String contentType) {
String uuid = IDGenerator.getUUID();
NotificationInfo info = new NotificationInfo();
info.setId(uuid);
info.setWho(context.getUser());
info.setContent(content);
info.setReference(referenceId);
info.setEpoch(currentEpoch);
info.setWhen(new Date());
info.setContentType(contentType);
info.setKernelId(context.getContext());
currentEpoch++;
notifications.put(info.getEpoch(), info);
notificationsById.put(info.getId(), info);
return uuid;
}