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I'm struggling to get my stateless events to trigger configured rules despite a line crossing event from Object Analytics working as expected. I have wired in an LED to the output and confirmed it is lit correctly when the line crossing event rule is configured, but it never fires when my application sends its event.
Can anyone point me in the right direction? Modified
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Answered by
kaiiorg
May 20, 2025
Replies: 2 comments 2 replies
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you should try using a bool entrie called active for the event key value set and toggle this to true or false, may have an timeout to switch back, like active -> true, timeout for 10 sec, active -> false. may your rule configuration when using string may does not trigger the rule at all. |
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1 reply
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Tried adding an Also, I've gotten approval to use Axis Metadata Monitor and have confirmed events are being sent: Code#include <axsdk/axevent.h>
#include <glib-object.h>
#include <glib.h>
#include <string.h>
#include <syslog.h>
typedef struct {
AXEventHandler* event_handler;
guint event_id;
guint timer;
gboolean active;
} AppData;
static AppData* app_data = NULL;
static gboolean send_event(AppData* send_data) {
AXEventKeyValueSet* key_value_set = NULL;
AXEvent* event = NULL;
GError* error = NULL;
key_value_set = ax_event_key_value_set_new();
ax_event_key_value_set_add_key_value(key_value_set, "data", NULL, "value", AX_VALUE_TYPE_STRING, NULL);
ax_event_key_value_set_add_key_value(key_value_set, "active", NULL, (gconstpointer)&app_data->active, AX_VALUE_TYPE_BOOL, NULL);
app_data->active = !app_data->active;
event = ax_event_new2(key_value_set, NULL);
ax_event_key_value_set_free(key_value_set);
if(ax_event_handler_send_event(send_data->event_handler, send_data->event_id, event, &error)) {
syslog(LOG_INFO, "Sent stateless event");
} else {
syslog(LOG_WARNING, "Failed to send event: %s", error->message);
g_error_free(error);
}
ax_event_free(event);
return TRUE;
}
static void declaration_complete(guint declaration, gdouble* value) {
syslog(LOG_INFO, "Declaration complete for: %d", declaration);
(void)(value);
app_data->timer = g_timeout_add_seconds(10, (GSourceFunc)send_event, app_data);
}
static guint setup_declaration(AXEventHandler* event_handler) {
AXEventKeyValueSet* key_value_set = NULL;
guint declaration = 0;
GError* error = NULL;
key_value_set = ax_event_key_value_set_new();
ax_event_key_value_set_add_key_values(
key_value_set, NULL,
"topic0", "tnsaxis", "CameraApplicationPlatform", AX_VALUE_TYPE_STRING,
"topic1", NULL , "ExampleService" , AX_VALUE_TYPE_STRING,
"topic2", NULL , "EventName" , AX_VALUE_TYPE_STRING,
"data" , NULL , NULL , AX_VALUE_TYPE_STRING,
"active", NULL , NULL , AX_VALUE_TYPE_BOOL,
NULL
);
ax_event_key_value_set_mark_as_data(key_value_set, "data", NULL, NULL);
ax_event_key_value_set_mark_as_data(key_value_set, "active", NULL, NULL);
if (!ax_event_handler_declare(event_handler, key_value_set, TRUE, &declaration, (AXDeclarationCompleteCallback)declaration_complete, NULL, &error)) {
syslog(LOG_WARNING, "Could not declare: %s", error->message);
g_error_free(error);
}
ax_event_key_value_set_free(key_value_set);
return declaration;
}
gint main(void) {
GMainLoop* main_loop = NULL;
openlog(NULL, LOG_PID, LOG_USER);
syslog(LOG_INFO, "Started logging from send event application");
app_data = calloc(1, sizeof(AppData));
app_data->event_handler = ax_event_handler_new();
app_data->event_id = setup_declaration(app_data->event_handler);
main_loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(main_loop);
ax_event_handler_undeclare(app_data->event_handler, app_data->event_id, NULL);
ax_event_handler_free(app_data->event_handler);
free(app_data);
g_main_loop_unref(main_loop);
} |
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Update: I've reverted axevent/send_event to the current state in main and changed the ax_event_key_value_set_add_key_value(key_value_set,
"topic0",
"tnsaxis",
"CameraApplicationPlatform",
AX_VALUE_TYPE_STRING,
NULL);I then reconfigured the event to target the |
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1 reply
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I don't know if this is the complete answer, but this is what I've learned so far:
Code#include <axsdk/axevent.h>
#include <glib-object.h>
#include <glib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
typedef struct {
AXEventHandler* event_handler;
guint event_id;
guint timer;
gboolean stateless;
} AppData;
static AppData* app_data = NULL;
static gboolean send_event(AppData* send_data) {
char text[100];
time_t now = time(NULL);
struct tm *t = localtime(&now);
strftime(text, sizeof(text)-1, "%d %m %Y %H:%M:%S", t);
AXEventKeyValueSet* key_value_set = NULL;
AXEvent* event = NULL;
key_value_set = ax_event_key_value_set_new();
ax_event_key_value_set_add_key_value(key_value_set, "Time", NULL, &text, AX_VALUE_TYPE_STRING, NULL);
event = ax_event_new2(key_value_set, NULL);
ax_event_key_value_set_free(key_value_set);
ax_event_handler_send_event(send_data->event_handler, send_data->event_id, event, NULL);
syslog(LOG_INFO, "Send state%s event", send_data->stateless ? "less" : "ful");
ax_event_free(event);
return TRUE;
}
static void declaration_complete(guint declaration, AppData* app_data) {
syslog(LOG_INFO, "Declaration complete for: %d", declaration);
app_data->timer = g_timeout_add_seconds(2, (GSourceFunc)send_event, app_data);
}
static guint setup_declaration(AppData* app_data) {
AXEventKeyValueSet* key_value_set = NULL;
guint declaration = 0;
GError* error = NULL;
key_value_set = ax_event_key_value_set_new();
if (app_data->stateless) {
ax_event_key_value_set_add_key_values(
key_value_set, NULL,
"topic0", "tnsaxis", "CameraApplicationPlatform", AX_VALUE_TYPE_STRING,
"topic1", "tnsaxis", "ExampleService" , AX_VALUE_TYPE_STRING,
"topic2", "tnsaxis", "EventName" , AX_VALUE_TYPE_STRING,
"Time" , NULL , NULL , AX_VALUE_TYPE_STRING,
NULL
);
} else {
ax_event_key_value_set_add_key_values(
key_value_set, NULL,
"topic0", "tnsaxis", "CameraApplicationPlatform", AX_VALUE_TYPE_STRING,
"topic1", "tnsaxis", "ExampleService" , AX_VALUE_TYPE_STRING,
"topic2", "tnsaxis", "EventName" , AX_VALUE_TYPE_STRING,
"Time" , NULL , "" , AX_VALUE_TYPE_STRING,
NULL
);
}
ax_event_key_value_set_mark_as_data(key_value_set, "Time", NULL, NULL);
if (!ax_event_handler_declare(app_data->event_handler, key_value_set, app_data->stateless, &declaration, (AXDeclarationCompleteCallback)declaration_complete, app_data, &error)) {
syslog(LOG_WARNING, "Could not declare: %s", error->message);
g_error_free(error);
}
ax_event_key_value_set_free(key_value_set);
return declaration;
}
gint main(void) {
GMainLoop* main_loop = NULL;
openlog(NULL, LOG_PID, LOG_USER);
syslog(LOG_INFO, "Started logging from send event application");
app_data = calloc(1, sizeof(AppData));
app_data->stateless = TRUE;
app_data->event_handler = ax_event_handler_new();
app_data->event_id = setup_declaration(app_data);
main_loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(main_loop);
ax_event_handler_undeclare(app_data->event_handler, app_data->event_id, NULL);
ax_event_handler_free(app_data->event_handler);
free(app_data);
g_main_loop_unref(main_loop);
} |
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Answer selected by
kaiiorg
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I don't know if this is the complete answer, but this is what I've learned so far:
topicXkeys must be intnsaxisortns1namespace any other (or no) namespace and it stops working, even after recreating the rule.Code