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

Example 1 with DataChangeNotification

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

the class OpcUaSubscriptionManager method deliverNotificationMessage.

private CompletableFuture<Unit> deliverNotificationMessage(OpcUaSubscription subscription, NotificationMessage notificationMessage) {
    CompletableFuture<Unit> delivered = new CompletableFuture<>();
    subscription.getNotificationSemaphore().acquire().thenAccept(permit -> deliveryQueue.submit(() -> {
        try {
            Map<UInteger, OpcUaMonitoredItem> items = subscription.getItemsByClientHandle();
            List<ExtensionObject> notificationData = l(notificationMessage.getNotificationData());
            if (notificationData.isEmpty()) {
                subscriptionListeners.forEach(listener -> listener.onKeepAlive(subscription, notificationMessage.getPublishTime()));
                subscription.getNotificationListeners().forEach(listener -> listener.onKeepAliveNotification(subscription, notificationMessage.getPublishTime()));
            }
            for (ExtensionObject xo : notificationData) {
                Object o = xo.decode(client.getStaticSerializationContext());
                if (o instanceof DataChangeNotification) {
                    DataChangeNotification dcn = (DataChangeNotification) o;
                    List<MonitoredItemNotification> monitoredItemNotifications = l(dcn.getMonitoredItems());
                    int notificationCount = monitoredItemNotifications.size();
                    logger.debug("Received {} MonitoredItemNotifications", notificationCount);
                    for (MonitoredItemNotification min : monitoredItemNotifications) {
                        logger.trace("MonitoredItemNotification: clientHandle={}, value={}", min.getClientHandle(), min.getValue());
                        OpcUaMonitoredItem item = items.get(min.getClientHandle());
                        if (item != null)
                            item.onValueArrived(min.getValue());
                        else
                            logger.warn("no item for clientHandle=" + min.getClientHandle());
                    }
                    if (notificationCount == 0) {
                        subscriptionListeners.forEach(listener -> listener.onKeepAlive(subscription, notificationMessage.getPublishTime()));
                        subscription.getNotificationListeners().forEach(listener -> listener.onKeepAliveNotification(subscription, notificationMessage.getPublishTime()));
                    } else {
                        if (!subscription.getNotificationListeners().isEmpty()) {
                            List<UaMonitoredItem> monitoredItems = new ArrayList<>();
                            List<DataValue> dataValues = new ArrayList<>();
                            for (MonitoredItemNotification n : monitoredItemNotifications) {
                                UaMonitoredItem item = subscription.getItemsByClientHandle().get(n.getClientHandle());
                                if (item != null) {
                                    monitoredItems.add(item);
                                    dataValues.add(n.getValue());
                                }
                            }
                            subscription.getNotificationListeners().forEach(listener -> listener.onDataChangeNotification(subscription, monitoredItems, dataValues, notificationMessage.getPublishTime()));
                        }
                    }
                } else if (o instanceof EventNotificationList) {
                    EventNotificationList enl = (EventNotificationList) o;
                    List<EventFieldList> eventFieldLists = l(enl.getEvents());
                    for (EventFieldList efl : eventFieldLists) {
                        logger.trace("EventFieldList: clientHandle={}, values={}", efl.getClientHandle(), Arrays.toString(efl.getEventFields()));
                        OpcUaMonitoredItem item = items.get(efl.getClientHandle());
                        if (item != null)
                            item.onEventArrived(efl.getEventFields());
                    }
                    if (!subscription.getNotificationListeners().isEmpty()) {
                        List<UaMonitoredItem> monitoredItems = new ArrayList<>();
                        List<Variant[]> eventFields = new ArrayList<>();
                        for (EventFieldList efl : eventFieldLists) {
                            UaMonitoredItem item = subscription.getItemsByClientHandle().get(efl.getClientHandle());
                            if (item != null) {
                                monitoredItems.add(item);
                                eventFields.add(efl.getEventFields());
                            }
                        }
                        subscription.getNotificationListeners().forEach(listener -> listener.onEventNotification(subscription, monitoredItems, eventFields, notificationMessage.getPublishTime()));
                    }
                } else if (o instanceof StatusChangeNotification) {
                    StatusChangeNotification scn = (StatusChangeNotification) o;
                    logger.debug("StatusChangeNotification: {}", scn.getStatus());
                    subscriptionListeners.forEach(listener -> listener.onStatusChanged(subscription, scn.getStatus()));
                    subscription.getNotificationListeners().forEach(listener -> listener.onStatusChangedNotification(subscription, scn.getStatus()));
                    if (scn.getStatus().getValue() == StatusCodes.Bad_Timeout) {
                        subscriptions.remove(subscription.getSubscriptionId());
                    }
                }
            }
        } finally {
            permit.release();
            delivered.complete(Unit.VALUE);
        }
    }));
    return delivered;
}

Example 2 with DataChangeNotification

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

the class Subscription method sendNotifications.

private void sendNotifications(ServiceRequest service, List<UaStructure> notifications) {
    List<MonitoredItemNotification> dataNotifications = Lists.newArrayList();
    List<EventFieldList> eventNotifications = Lists.newArrayList();
    notifications.forEach(notification -> {
        if (notification instanceof MonitoredItemNotification) {
            dataNotifications.add((MonitoredItemNotification) notification);
        } else if (notification instanceof EventFieldList) {
            eventNotifications.add((EventFieldList) notification);
        }
    });
    List<ExtensionObject> notificationData = Lists.newArrayList();
    if (dataNotifications.size() > 0) {
        DataChangeNotification dataChange = new DataChangeNotification(dataNotifications.toArray(new MonitoredItemNotification[0]), new DiagnosticInfo[0]);
        notificationData.add(ExtensionObject.encode(serializationContext, dataChange, dataChange.getBinaryEncodingId(), OpcUaDefaultBinaryEncoding.getInstance()));
        subscriptionDiagnostics.getDataChangeNotificationsCount().add(dataNotifications.size());
    }
    if (eventNotifications.size() > 0) {
        EventNotificationList eventChange = new EventNotificationList(eventNotifications.toArray(new EventFieldList[0]));
        notificationData.add(ExtensionObject.encode(serializationContext, eventChange, eventChange.getBinaryEncodingId(), OpcUaDefaultBinaryEncoding.getInstance()));
        subscriptionDiagnostics.getEventNotificationsCount().add(eventNotifications.size());
    }
    subscriptionDiagnostics.getNotificationsCount().add(notificationData.size());
    UInteger sequenceNumber = uint(nextSequenceNumber());
    NotificationMessage notificationMessage = new NotificationMessage(sequenceNumber, DateTime.now(), notificationData.toArray(new ExtensionObject[0]));
    availableMessages.put(notificationMessage.getSequenceNumber(), notificationMessage);
    while (availableMessages.size() > MAX_AVAILABLE_MESSAGES) {
        Map.Entry<UInteger, NotificationMessage> entry = availableMessages.pollFirstEntry();
        if (entry != null) {
            subscriptionDiagnostics.getDiscardedMessageCount().increment();
            logger.debug("Discarded cached NotificationMessage with sequenceNumber={}", entry.getKey());
        }
    }
    UInteger[] available = getAvailableSequenceNumbers();
    StatusCode[] acknowledgeResults = service.attr(KEY_ACK_RESULTS).get();
    ResponseHeader header = service.createResponseHeader();
    PublishResponse response = new PublishResponse(header, subscriptionId, available, moreNotifications, notificationMessage, acknowledgeResults, new DiagnosticInfo[0]);
    service.setResponse(response);
    logger.debug("[id={}] returning {} DataChangeNotification(s) and " + "{} EventNotificationList(s) sequenceNumber={} moreNotifications={}.", subscriptionId, dataNotifications.size(), eventNotifications.size(), sequenceNumber, moreNotifications);
}