localhorst/smart-oil-heating-control-system
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error handling and cleanup

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This commit is contained in:
Hendrik Schutter
2026-01-10 13:32:49 +01:00
parent f8f6af53bd
commit 1d4e272d80
15 changed files with 867 additions and 309 deletions
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78
main/metrics.c
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@ -1,3 +1,8 @@
/**
* @file metrics.c
* @brief Implementation of Prometheus metrics endpoint.
*/
#include "metrics.h"
#include "outputs.h"
#include "inputs.h"
@ -15,41 +20,50 @@
#include <time.h>
#include <sys/time.h>
static const char *TAG = "smart-oil-heater-control-system-metrics";
static const char *TAG = "metrics";
char caHtmlResponse[HTML_RESPONSE_SIZE];
SemaphoreHandle_t xMutexAccessMetricResponse = NULL;
static char caHtmlResponse[HTML_RESPONSE_SIZE];
static SemaphoreHandle_t xMutexAccessMetricResponse = NULL;
static sMetric aMetrics[METRIC_MAX_COUNT];
static uint16_t u16MetricCounter = 0U;
void taskMetrics(void *pvParameters);
httpd_handle_t setup_server(void);
esp_err_t get_metrics_handler(httpd_req_t *req);
/* Private function prototypes */
static void taskMetrics(void *pvParameters);
static httpd_handle_t setup_server(void);
static esp_err_t get_metrics_handler(httpd_req_t *req);
void initMetrics(void)
esp_err_t initMetrics(void)
{
setup_server();
httpd_handle_t server = setup_server();
if (server == NULL)
{
ESP_LOGE(TAG, "Failed to start HTTP server");
return ESP_FAIL;
}
BaseType_t taskCreated = xTaskCreate(
taskMetrics, // Function to implement the task
"taskMetrics", // Task name
32768, // Stack size (in words, not bytes)
NULL, // Parameters to the task function (none in this case)
5, // Task priority (higher number = higher priority)
NULL // Task handle (optional)
);
taskMetrics,
"taskMetrics",
32768,
NULL,
5,
NULL);
if (taskCreated == pdPASS)
{
ESP_LOGI(TAG, "Task created successfully!");
}
else
if (taskCreated != pdPASS)
{
ESP_LOGE(TAG, "Failed to create task");
return ESP_FAIL;
}
ESP_LOGI(TAG, "Initialized successfully");
return ESP_OK;
}
void taskMetrics(void *pvParameters)
/**
* @brief Metrics collection task.
* @param pvParameters Task parameters (unused).
*/
static void taskMetrics(void *pvParameters)
{
while (1)
{
@ -338,8 +352,6 @@ void vSetMetrics(sMetric *paMetrics, uint16_t u16Size)
break;
}
// printf("%s\n", paMetrics[u16Index].caMetricName);
// printf("%s\n", caValueBuffer);
strcat(caHtmlResponse, paMetrics[u16Index].caMetricName);
strcat(caHtmlResponse, caValueBuffer);
strcat(caHtmlResponse, "\n");
@ -352,7 +364,12 @@ void vSetMetrics(sMetric *paMetrics, uint16_t u16Size)
}
}
esp_err_t get_metrics_handler(httpd_req_t *req)
/**
* @brief HTTP GET handler for /metrics endpoint.
* @param req HTTP request.
* @return ESP_OK on success.
*/
static esp_err_t get_metrics_handler(httpd_req_t *req)
{
if (xSemaphoreTakeRecursive(xMutexAccessMetricResponse, pdMS_TO_TICKS(5000)) == pdTRUE)
{
@ -367,7 +384,11 @@ esp_err_t get_metrics_handler(httpd_req_t *req)
}
}
httpd_handle_t setup_server(void)
/**
* @brief Setup HTTP server for metrics endpoint.
* @return HTTP server handle or NULL on failure.
*/
static httpd_handle_t setup_server(void)
{
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.server_port = 9100;
@ -382,14 +403,17 @@ httpd_handle_t setup_server(void)
xMutexAccessMetricResponse = xSemaphoreCreateRecursiveMutex();
if (xMutexAccessMetricResponse == NULL)
{
ESP_LOGE(TAG, "Unable to create mutex for metric response");
ESP_LOGE(TAG, "Failed to create mutex");
return NULL;
}
xSemaphoreGiveRecursive(xMutexAccessMetricResponse);
if (httpd_start(&server, &config) == ESP_OK)
{
httpd_register_uri_handler(server, &uri_get);
return server;
}
return server;
ESP_LOGE(TAG, "Failed to start HTTP server");
return NULL;
}