mirror of
https://github.com/open62541/open62541.git
synced 2026-10-16 20:33:18 +08:00
Julius Pfrommer
100 lines
3.9 KiB
C
100 lines
3.9 KiB
C
/* This work is licensed under a Creative Commons CCZero 1.0 Universal License.
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* See http://creativecommons.org/publicdomain/zero/1.0/ for more information. */
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#include <open62541/client.h>
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#include <open62541/client_config_default.h>
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#include <open62541/client_highlevel.h>
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#include <open62541/client_subscriptions.h>
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#include <open62541/plugin/log_stdout.h>
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#include <open62541/server.h>
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#include <open62541/server_config_default.h>
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#include <open62541/util.h>
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#include <stdio.h>
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static void
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handler_events(UA_Client *client, UA_UInt32 subId, void *subContext,
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UA_UInt32 monId, void *monContext,
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const UA_KeyValueMap eventFields) {
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UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION, "Notification");
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for(size_t i = 0; i < eventFields.mapSize; ++i) {
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UA_String out = UA_STRING_NULL;
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UA_print(&eventFields.map[i].value, &UA_TYPES[UA_TYPES_VARIANT], &out);
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UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION,
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"%S: '%S", eventFields.map[i].key.name, out);
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UA_String_clear(&out);
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}
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}
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int main(int argc, char *argv[]) {
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if(argc < 2) {
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printf("Usage: tutorial_client_events <opc.tcp://server-url>\n");
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return 0;
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}
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UA_Client *client = UA_Client_new();
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UA_ClientConfig_setDefault(UA_Client_getConfig(client));
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/* opc.tcp://uademo.prosysopc.com:53530/OPCUA/SimulationServer */
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/* opc.tcp://opcua.demo-this.com:51210/UA/SampleServer */
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UA_StatusCode retval = UA_Client_connect(client, argv[1]);
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if(retval != UA_STATUSCODE_GOOD) {
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UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION, "Could not connect");
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UA_Client_delete(client);
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return 0;
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}
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/* Create a subscription */
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UA_CreateSubscriptionRequest request = UA_CreateSubscriptionRequest_default();
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UA_CreateSubscriptionResponse response =
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UA_Client_Subscriptions_create(client, request, NULL, NULL, NULL);
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if(response.responseHeader.serviceResult != UA_STATUSCODE_GOOD) {
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UA_Client_disconnect(client);
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UA_Client_delete(client);
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return 0;
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}
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UA_UInt32 subId = response.subscriptionId;
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UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION,
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"Create subscription succeeded, id %u", subId);
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/* Add a MonitoredItem */
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UA_MonitoredItemCreateRequest item;
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UA_MonitoredItemCreateRequest_init(&item);
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item.itemToMonitor.nodeId = UA_NS0ID(SERVER);
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item.itemToMonitor.attributeId = UA_ATTRIBUTEID_EVENTNOTIFIER;
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item.monitoringMode = UA_MONITORINGMODE_REPORTING;
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/* Set the EventFilter. See the documentation for the human-readable
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* EventFilter expression developed for open62541. */
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char *eventFilter = "SELECT /Message, /Severity WHERE /Severity >= 100";
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UA_EventFilter filter;
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retval = UA_EventFilter_parse(&filter, UA_STRING(eventFilter), NULL);
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UA_assert(retval == UA_STATUSCODE_GOOD);
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UA_ExtensionObject_setValue(&item.requestedParameters.filter,
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&filter, &UA_TYPES[UA_TYPES_EVENTFILTER]);
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UA_MonitoredItemCreateResult result =
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UA_Client_MonitoredItems_createEvent(client, subId,
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UA_TIMESTAMPSTORETURN_BOTH, item,
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NULL, handler_events, NULL);
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if(result.statusCode == UA_STATUSCODE_GOOD) {
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/* Run the client until ctrl-c */
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UA_Client_runUntilInterrupt(client);
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} else {
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UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION,
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"Could not add the MonitoredItem with %s",
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UA_StatusCode_name(result.statusCode));
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}
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/* Disconnect and clean up */
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UA_Client_Subscriptions_deleteSingle(client, response.subscriptionId);
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UA_Client_disconnect(client);
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UA_Client_delete(client);
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UA_MonitoredItemCreateResult_clear(&result);
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UA_EventFilter_clear(&filter);
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return 0;
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}
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