Examples with TransferSubscriptionsResponse org.eclipse.milo.opcua.stack.core.types.structured.TransferSubscriptionsResponse used on opensource projects

Example 1 with TransferSubscriptionsResponse

use of org.eclipse.milo.opcua.stack.core.types.structured.TransferSubscriptionsResponse in project milo by eclipse.

the class DefaultSubscriptionServiceSet method onTransferSubscriptions.

@Override
public void onTransferSubscriptions(ServiceRequest service) throws UaException {
    TransferSubscriptionsRequest request = (TransferSubscriptionsRequest) service.getRequest();
    OpcUaServer server = service.attr(ServiceAttributes.SERVER_KEY).get();
    Session session = service.attr(ServiceAttributes.SESSION_KEY).get();
    List<UInteger> subscriptionIds = l(request.getSubscriptionIds());
    if (subscriptionIds.isEmpty()) {
        throw new UaException(StatusCodes.Bad_NothingToDo);
    }
    List<TransferResult> results = Lists.newArrayList();
    for (UInteger subscriptionId : subscriptionIds) {
        Subscription subscription = server.getSubscriptions().get(subscriptionId);
        if (subscription == null) {
            results.add(new TransferResult(new StatusCode(StatusCodes.Bad_SubscriptionIdInvalid), new UInteger[0]));
        } else {
            Session otherSession = subscription.getSession();
            if (!sessionsHaveSameUser(session, otherSession)) {
                results.add(new TransferResult(new StatusCode(StatusCodes.Bad_UserAccessDenied), new UInteger[0]));
            } else {
                UInteger[] availableSequenceNumbers;
                synchronized (subscription) {
                    otherSession.getSubscriptionManager().sendStatusChangeNotification(subscription, new StatusCode(StatusCodes.Good_SubscriptionTransferred));
                    otherSession.getSubscriptionManager().removeSubscription(subscriptionId);
                    subscription.setSubscriptionManager(session.getSubscriptionManager());
                    subscriptionManager.addSubscription(subscription);
                    subscription.getMonitoredItems().values().forEach(item -> item.setSession(session));
                    availableSequenceNumbers = subscription.getAvailableSequenceNumbers();
                    if (request.getSendInitialValues()) {
                        subscription.getMonitoredItems().values().stream().filter(item -> item instanceof MonitoredDataItem).map(item -> (MonitoredDataItem) item).forEach(MonitoredDataItem::maybeSendLastValue);
                    }
                }
                subscription.getSubscriptionDiagnostics().getTransferRequestCount().increment();
                ApplicationDescription toClient = session.getClientDescription();
                ApplicationDescription fromClient = otherSession.getClientDescription();
                if (Objects.equals(toClient, fromClient)) {
                    subscription.getSubscriptionDiagnostics().getTransferredToSameClientCount().increment();
                } else {
                    subscription.getSubscriptionDiagnostics().getTransferredToAltClientCount().increment();
                }
                results.add(new TransferResult(StatusCode.GOOD, availableSequenceNumbers));
            }
        }
    }
    TransferSubscriptionsResponse response = new TransferSubscriptionsResponse(service.createResponseHeader(), a(results, TransferResult.class), new DiagnosticInfo[0]);
    service.setResponse(response);
}