/**
* Setting up an event
* ^^^^^^^^^^^^^^^^^^^
* In order to set up the event, we can first use ``UA_Server_createEvent`` to give us a node representation of the event.
* All we need for this is our `EventType`. Once we have our event node, which is saved internally as an `ObjectNode`,
* we can define the attributes the event has the same way we would define the attributes of an object node. It is not
* necessary to define the attributes `EventId`, `ReceiveTime`, `SourceNode` or `EventType` since these are set
* automatically by the server. In this example, we will be setting the fields 'Message' and 'Severity' in addition
* to `Time` which is needed to make the example UaExpert compliant.
*/
static UA_StatusCode
setUpEvent(UA_Server *server, UA_NodeId *outId) {
UA_StatusCode retval = UA_Server_createEvent(server, eventType, outId);
if (retval != UA_STATUSCODE_GOOD) {
UA_LOG_WARNING(UA_Log_Stdout, UA_LOGCATEGORY_SERVER,
"createEvent failed. StatusCode %s", UA_StatusCode_name(retval));
return retval;
}
/* Set the Event Attributes */
/* Setting the Time is required or else the event will not show up in UAExpert! */
UA_DateTime eventTime = UA_DateTime_now();
UA_Server_writeObjectProperty_scalar(server, *outId, UA_QUALIFIEDNAME(0, "Time"),
&eventTime, &UA_TYPES[UA_TYPES_DATETIME]);
UA_UInt16 eventSeverity = 100;
UA_Server_writeObjectProperty_scalar(server, *outId, UA_QUALIFIEDNAME(0, "Severity"),
&eventSeverity, &UA_TYPES[UA_TYPES_UINT16]);
UA_LocalizedText eventMessage = UA_LOCALIZEDTEXT("en-US", "An event has been generated.");
UA_Server_writeObjectProperty_scalar(server, *outId, UA_QUALIFIEDNAME(0, "Message"),
&eventMessage, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]);
UA_String eventSourceName = UA_STRING("Server");
UA_Server_writeObjectProperty_scalar(server, *outId, UA_QUALIFIEDNAME(0, "SourceName"),
&eventSourceName, &UA_TYPES[UA_TYPES_STRING]);
return UA_STATUSCODE_GOOD;
}
static UA_StatusCode eventSetup(UA_NodeId *eventNodeId) {
UA_StatusCode retval;
retval = UA_Server_createEvent(server, eventType, eventNodeId);
ck_assert_uint_eq(retval, UA_STATUSCODE_GOOD);
// add a severity to the event
UA_Variant value;
UA_RelativePathElement rpe;
UA_RelativePathElement_init(&rpe);
rpe.referenceTypeId = UA_NODEID_NUMERIC(0, UA_NS0ID_HASPROPERTY);
rpe.isInverse = false;
rpe.includeSubtypes = false;
UA_BrowsePath bp;
UA_BrowsePath_init(&bp);
bp.startingNode = *eventNodeId;
bp.relativePath.elementsSize = 1;
bp.relativePath.elements = &rpe;
rpe.targetName = UA_QUALIFIEDNAME(0, "Severity");
UA_BrowsePathResult bpr = UA_Server_translateBrowsePathToNodeIds(server, &bp);
// number with no special meaning
UA_UInt16 eventSeverity = 1000;
UA_Variant_setScalar(&value, &eventSeverity, &UA_TYPES[UA_TYPES_UINT16]);
UA_Server_writeValue(server, bpr.targets[0].targetId.nodeId, value);
UA_BrowsePathResult_deleteMembers(&bpr);
//add a message to the event
rpe.targetName = UA_QUALIFIEDNAME(0, "Message");
bpr = UA_Server_translateBrowsePathToNodeIds(server, &bp);
UA_LocalizedText message = UA_LOCALIZEDTEXT("en-US", "Generated Event");
UA_Variant_setScalar(&value, &message, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]);
UA_Server_writeValue(server, bpr.targets[0].targetId.nodeId, value);
UA_BrowsePathResult_deleteMembers(&bpr);
return retval;
}