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Add prometheus-client hooks #3

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Add prometheus-client hooks #3

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1 change: 0 additions & 1 deletion include/mgos_mqtt.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@

#ifndef CS_FW_SRC_MGOS_MQTT_H_
#define CS_FW_SRC_MGOS_MQTT_H_

#include <stdbool.h>

#include "mgos_features.h"
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38 changes: 38 additions & 0 deletions src/mgos_mqtt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,9 @@
#include "mgos_sys_config.h"
#include "mgos_timers.h"
#include "mgos_utils.h"
#if MGOS_HAVE_PROMETHEUS_METRICS
#include "mgos_prometheus_metrics.h"
#endif // MGOS_HAVE_PROMETHEUS_METRICS

#ifndef MGOS_MQTT_LOG_PUSHBACK_THRESHOLD
#define MGOS_MQTT_LOG_PUSHBACK_THRESHOLD 2048
Expand All @@ -28,6 +31,29 @@
#define MGOS_MQTT_SUBSCRIBE_QOS 1
#endif

#if MGOS_HAVE_PROMETHEUS_METRICS
static uint32_t metrics_mqtt_sent_topics_count = 0;
static uint32_t metrics_mqtt_sent_topics_bytes_total = 0;
static uint32_t metrics_mqtt_received_topics_count = 0;
static uint32_t metrics_mqtt_received_topics_bytes_total = 0;

static void metrics_mqtt(struct mg_connection *nc, void *user_data) {
mgos_prometheus_metrics_printf(nc, COUNTER, "mgos_mqtt_sent_topics_count", "MQTT topics sent",
"%u", metrics_mqtt_sent_topics_count);

mgos_prometheus_metrics_printf(nc, COUNTER, "mgos_mqtt_sent_topics_bytes_total", "Total bytes sent in MQTT topics",
"%u", metrics_mqtt_sent_topics_bytes_total);

mgos_prometheus_metrics_printf(nc, COUNTER, "mgos_mqtt_received_topics_count", "MQTT topics sent",
"%u", metrics_mqtt_received_topics_count);

mgos_prometheus_metrics_printf(nc, COUNTER, "mgos_mqtt_received_topics_bytes_total", "Total bytes received in MQTT topics",
"%u", metrics_mqtt_received_topics_bytes_total);

(void) user_data;
}
#endif // MGOS_HAVE_PROMETHEUS_METRICS

struct topic_handler {
struct mg_str topic;
mg_event_handler_t handler;
Expand Down Expand Up @@ -282,6 +308,10 @@ bool mgos_mqtt_init(void) {

mgos_hook_register(MGOS_HOOK_DEBUG_WRITE, s_debug_write_hook, NULL);

#if MGOS_HAVE_PROMETHEUS_METRICS
mgos_prometheus_metrics_add_handler(metrics_mqtt, NULL);
#endif

return true;
}

Expand Down Expand Up @@ -363,6 +393,10 @@ bool mgos_mqtt_pub(const char *topic, const void *message, size_t len, int qos,
(retain ? " (RETAIN)" : ""), (int) len, (int) len,
(const char *) message));
mg_mqtt_publish(c, topic, mgos_mqtt_get_packet_id(), flags, message, len);
#if MGOS_HAVE_PROMETHEUS_METRICS
metrics_mqtt_sent_topics_count++;
metrics_mqtt_sent_topics_bytes_total+=len;
#endif // MGOS_HAVE_PROMETHEUS_METRICS
return true;
}

Expand All @@ -378,6 +412,10 @@ static void mqttsubtrampoline(struct mg_connection *c, int ev, void *ev_data,
struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
sd->handler(c, mm->topic.p, mm->topic.len, mm->payload.p, mm->payload.len,
sd->user_data);
#if MGOS_HAVE_PROMETHEUS_METRICS
metrics_mqtt_received_topics_count++;
metrics_mqtt_received_topics_bytes_total+=mm->topic.len;
#endif // MGOS_HAVE_PROMETHEUS_METRICS
}

void mgos_mqtt_sub(const char *topic, sub_handler_t handler, void *user_data) {
Expand Down