I have looked at the examples for subscribing to a NodeId and im wondering how I could stop/delete a subscription afterward.
Eclipse Milo v0.3.8 Client.
Here's what I've tried.
protected boolean unsubscribe(TransactionDefinition transactionDefinition) {
// Finds the mathing TransactionDefinition from the map where all subscriptions
// are stored, together with the clientHandle.
// private Map<UInteger, TransactionDefinition> subscriptions = new HashMap<>();
try {
UInteger subscriptionClientHandle = null;
for (Map.Entry<UInteger, TransactionDefinition> entry : subscriptions.entrySet()) {
if (entry.getValue().equals(transactionDefinition))
subscriptionClientHandle = entry.getKey();
}
if (subscriptionClientHandle == null) return false;
try {
client.getSubscriptionManager().deleteSubscription(subscriptionClientHandle).get();
return true;
} catch (Exception e) {
log.error("Subscription not found: {}", e.getMessage(), e.getCause());
e.printStackTrace();
}
} catch (ClassCastException e) {
log.error("TransactionDefinition trigger not found. {}", e.getMessage(), e.getCause());
e.printStackTrace();
}
return false;
}
UaSubscription
has a deleteMonitoredItems
method on it.
UaSubscriptionManager
has a deleteSubscription
method on it.
You could also call either of these services "manually" by invoking the "raw" service methods on the UaClient
instance.