Examples with AssetSubscriptionProvider de.fraunhofer.iosb.ilt.faaast.service.assetconnection.AssetSubscriptionProvider used on opensource projects

Example 1 with AssetSubscriptionProvider

use of de.fraunhofer.iosb.ilt.faaast.service.assetconnection.AssetSubscriptionProvider in project FAAAST-Service by FraunhoferIOSB.

the class OpcUaAssetConnection method registerSubscriptionProvider.

/**
 * {@inheritdoc}
 *
 * @throws AssetConnectionException if reference does not point to a
 *             {@link io.adminshell.aas.v3.model.Property}
 * @throws AssetConnectionException if referenced
 *             {@link io.adminshell.aas.v3.model.Property} does not have datatype
 *             defined
 */
@Override
public void registerSubscriptionProvider(Reference reference, OpcUaSubscriptionProviderConfig subscriptionProvider) throws AssetConnectionException {
    final String baseErrorMessage = "error registering subscription provider";
    TypeInfo typeInfo = serviceContext.getTypeInfo(reference);
    if (typeInfo == null) {
        throw new AssetConnectionException(String.format("%s - could not resolve type information (reference: %s)", baseErrorMessage, AasUtils.asString(reference)));
    }
    if (!ElementValueTypeInfo.class.isAssignableFrom(typeInfo.getClass())) {
        throw new AssetConnectionException(String.format("%s - reference must point to element with value (reference: %s)", baseErrorMessage, AasUtils.asString(reference)));
    }
    ElementValueTypeInfo valueTypeInfo = (ElementValueTypeInfo) typeInfo;
    if (!PropertyValue.class.isAssignableFrom(valueTypeInfo.getType())) {
        throw new AssetConnectionException(String.format("%s - unsupported element type (reference: %s, element type: %s)", baseErrorMessage, AasUtils.asString(reference), valueTypeInfo.getType()));
    }
    final Datatype datatype = valueTypeInfo.getDatatype();
    if (datatype == null) {
        throw new AssetConnectionException(String.format("%s - missing datatype (reference: %s)", baseErrorMessage, AasUtils.asString(reference)));
    }
    this.subscriptionProviders.put(reference, new AssetSubscriptionProvider() {

        @Override
        public void addNewDataListener(NewDataListener listener) throws AssetConnectionException {
            if (!subscriptions.containsKey(subscriptionProvider.getNodeId())) {
                SubscriptionHandler handler = new SubscriptionHandler();
                handler.datatype = datatype;
                try {
                    handler.originalValue = client.readValue(0, TimestampsToReturn.Neither, client.getAddressSpace().getVariableNode(parseNodeId(subscriptionProvider.getNodeId())).getNodeId()).get();
                } catch (UaException | InterruptedException | ExecutionException ex) {
                    logger.warn("{} - reading initial value of subscribed node failed (reference: {}, nodeId: {})", baseErrorMessage, AasUtils.asString(reference), subscriptionProvider.getNodeId());
                }
                try {
                    handler.dataItem = opcUaSubscription.createDataItem(parseNodeId(subscriptionProvider.getNodeId()), LambdaExceptionHelper.rethrowConsumer(x -> {
                        x.addDataValueListener(LambdaExceptionHelper.rethrowConsumer(v -> handler.notify(v)));
                    }));
                } catch (UaException ex) {
                    logger.warn("{} - could not create subscrption item (reference: {}, nodeId: {})", baseErrorMessage, AasUtils.asString(reference), subscriptionProvider.getNodeId());
                }
                subscriptions.put(subscriptionProvider.getNodeId(), handler);
            }
            List<NewDataListener> listeners = subscriptions.get(subscriptionProvider.getNodeId()).listeners;
            if (!listeners.contains(listener)) {
                listeners.add(listener);
            }
        }

        @Override
        public void removeNewDataListener(NewDataListener listener) throws AssetConnectionException {
            if (subscriptions.containsKey(subscriptionProvider.getNodeId())) {
                SubscriptionHandler handler = subscriptions.get(subscriptionProvider.getNodeId());
                if (handler.listeners.contains(listener)) {
                    handler.listeners.remove(listener);
                }
                if (handler.listeners.isEmpty()) {
                    try {
                        handler.dataItem.delete();
                        subscriptions.remove(subscriptionProvider.getNodeId());
                    } catch (UaException ex) {
                        throw new AssetConnectionException(String.format("%s - removing subscription failed (reference: %s, nodeId: %s)", baseErrorMessage, AasUtils.asString(reference), subscriptionProvider.getNodeId()), ex);
                    }
                }
            }
        }
    });
}