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

Example 1 with SubscriptionDiagnosticsDataType

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

the class SubscriptionDiagnosticsVariableArray method onStartup.

@Override
protected void onStartup() {
    ServerDiagnosticsTypeNode diagnosticsNode = (ServerDiagnosticsTypeNode) server.getAddressSpaceManager().getManagedNode(Identifiers.Server_ServerDiagnostics).orElseThrow(() -> new NoSuchElementException("NodeId: " + Identifiers.Server_ServerDiagnostics));
    diagnosticsEnabled.set(diagnosticsNode.getEnabledFlag());
    if (diagnosticsEnabled.get()) {
        // noinspection UnstableApiUsage
        server.getEventBus().register(eventSubscriber = new EventSubscriber());
    }
    attributeObserver = (node, attributeId, value) -> {
        if (attributeId == AttributeId.Value) {
            DataValue dataValue = (DataValue) value;
            Object o = dataValue.getValue().getValue();
            if (o instanceof Boolean) {
                boolean current = (boolean) o;
                boolean previous = diagnosticsEnabled.getAndSet(current);
                if (!previous && current) {
                    getSubscriptions().forEach(this::createSubscriptionDiagnosticsNode);
                    if (eventSubscriber == null) {
                        // noinspection UnstableApiUsage
                        server.getEventBus().register(eventSubscriber = new EventSubscriber());
                    }
                } else if (previous && !current) {
                    if (eventSubscriber != null) {
                        // noinspection UnstableApiUsage
                        server.getEventBus().unregister(eventSubscriber);
                        eventSubscriber = null;
                    }
                    subscriptionDiagnosticsVariables.forEach(AbstractLifecycle::shutdown);
                    subscriptionDiagnosticsVariables.clear();
                }
            }
        }
    };
    diagnosticsNode.getEnabledFlagNode().addAttributeObserver(attributeObserver);
    node.getFilterChain().addLast(diagnosticValueFilter(diagnosticsEnabled, ctx -> {
        ExtensionObject[] xos = ExtensionObject.encodeArray(server.getSerializationContext(), getSubscriptions().stream().map(s -> s.getSubscriptionDiagnostics().getSubscriptionDiagnosticsDataType()).toArray(SubscriptionDiagnosticsDataType[]::new));
        return new DataValue(new Variant(xos));
    }));
}