@Override
public void handle(ServiceRequest<GetEndpointsRequest, GetEndpointsResponse> service)
throws UaException {
GetEndpointsRequest request = service.getRequest();
String endpointUrl = request.getEndpointUrl();
if (endpointUrl == null) endpointUrl = "";
UaTcpStackServer server = servers.get(endpointUrl);
EndpointDescription[] endpoints =
(server != null) ? server.getEndpointDescriptions() : new EndpointDescription[0];
List<String> profileUris =
request.getProfileUris() != null
? Lists.newArrayList(request.getProfileUris())
: Lists.newArrayList();
EndpointDescription[] filtered =
Arrays.stream(endpoints)
.filter(ed -> filterProfileUris(ed, profileUris))
.filter(this::filterEndpointUrls)
.toArray(EndpointDescription[]::new);
service.setResponse(new GetEndpointsResponse(service.createResponseHeader(), filtered));
}
@Override
public void handle(ServiceRequest<FindServersRequest, FindServersResponse> service)
throws UaException {
FindServersRequest request = service.getRequest();
List<ApplicationDescription> servers = Lists.newArrayList();
List<String> serverUris = Lists.newArrayList(request.getServerUris());
for (UaTcpStackServer server : registered) {
ApplicationDescription description = server.getApplicationDescription();
if (serverUris.isEmpty()) {
servers.add(description);
} else {
if (serverUris.contains(description.getApplicationUri())) {
servers.add(description);
}
}
}
ResponseHeader header = service.createResponseHeader();
FindServersResponse response =
new FindServersResponse(
header, servers.toArray(new ApplicationDescription[servers.size()]));
service.setResponse(response);
}
void returnStatusChangeNotification(ServiceRequest<PublishRequest, PublishResponse> service) {
StatusChangeNotification statusChange =
new StatusChangeNotification(new StatusCode(StatusCodes.Bad_Timeout), null);
UInteger sequenceNumber = uint(nextSequenceNumber());
NotificationMessage notificationMessage =
new NotificationMessage(
sequenceNumber,
new DateTime(),
new ExtensionObject[] {ExtensionObject.encode(statusChange)});
ResponseHeader header = service.createResponseHeader();
PublishResponse response =
new PublishResponse(
header,
subscriptionId,
new UInteger[0],
false,
notificationMessage,
new StatusCode[0],
new DiagnosticInfo[0]);
service.setResponse(response);
logger.debug(
"[id={}] returned StatusChangeNotification sequenceNumber={}.",
subscriptionId,
sequenceNumber);
}
private void returnKeepAlive(ServiceRequest<PublishRequest, PublishResponse> service) {
ResponseHeader header = service.createResponseHeader();
UInteger sequenceNumber = uint(currentSequenceNumber());
NotificationMessage notificationMessage =
new NotificationMessage(sequenceNumber, DateTime.now(), new ExtensionObject[0]);
UInteger[] available = getAvailableSequenceNumbers();
UInteger requestHandle = service.getRequest().getRequestHeader().getRequestHandle();
StatusCode[] acknowledgeResults = subscriptionManager.getAcknowledgeResults(requestHandle);
PublishResponse response =
new PublishResponse(
header,
subscriptionId,
available,
moreNotifications,
notificationMessage,
acknowledgeResults,
new DiagnosticInfo[0]);
service.setResponse(response);
logger.debug(
"[id={}] returned keep-alive NotificationMessage sequenceNumber={}.",
subscriptionId,
sequenceNumber);
}
private void sendNotifications(
ServiceRequest<PublishRequest, PublishResponse> 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[dataNotifications.size()]),
new DiagnosticInfo[0]);
notificationData.add(ExtensionObject.encode(dataChange));
}
if (eventNotifications.size() > 0) {
EventNotificationList eventChange =
new EventNotificationList(
eventNotifications.toArray(new EventFieldList[eventNotifications.size()]));
notificationData.add(ExtensionObject.encode(eventChange));
}
UInteger sequenceNumber = uint(nextSequenceNumber());
NotificationMessage notificationMessage =
new NotificationMessage(
sequenceNumber,
new DateTime(),
notificationData.toArray(new ExtensionObject[notificationData.size()]));
availableMessages.put(notificationMessage.getSequenceNumber(), notificationMessage);
UInteger[] available = getAvailableSequenceNumbers();
UInteger requestHandle = service.getRequest().getRequestHeader().getRequestHandle();
StatusCode[] acknowledgeResults = subscriptionManager.getAcknowledgeResults(requestHandle);
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={}.",
subscriptionId,
dataNotifications.size(),
eventNotifications.size(),
sequenceNumber);
}