org.eclipse.milo.opcua.sdk.client.subscriptions

Interface ManagedDataItem.DataValueListener

Enclosing class:

ManagedDataItem

public static interface ManagedDataItem.DataValueListener

A callback that receives notification of new values for a ManagedDataItem.

Method Summary

Modifier and Type	Method and Description
void	onDataValueReceived(ManagedDataItem item, org.eclipse.milo.opcua.stack.core.types.builtin.DataValue value) A new DataValue for item has arrived.

Method Detail

onDataValueReceived

void onDataValueReceived(ManagedDataItem item,
                         org.eclipse.milo.opcua.stack.core.types.builtin.DataValue value)

A new DataValue for item has arrived.

Take care not to block unnecessarily in this callback because subscription notifications are processed synchronously as a backpressure mechanism. Blocking inside this callback will prevent subsequent notifications from being processed and new PublishRequests from being sent.

Parameters:

item - the ManagedDataItem for which a new value has arrived.

value - the new DataValue.