feat(monitor): add app node metrics

include/neuron/metrics.h

@@ -54,33 +54,48 @@ typedef enum {
 #define NEU_METRIC_RECV_BYTES_TYPE NEU_METRIC_TYPE_COUNTER
 #define NEU_METRIC_RECV_BYTES_HELP "Total number of bytes received"
 
+// maintained by neuron core
 // number of tag read including errors
 #define NEU_METRIC_TAG_READS_TOTAL "tag_reads_total"
 #define NEU_METRIC_TAG_READS_TOTAL_TYPE NEU_METRIC_TYPE_COUNTER
 #define NEU_METRIC_TAG_READS_TOTAL_HELP \
     "Total number of tag reads including errors"
 
+// maintained by neuron core
 // number of tag read errors
 #define NEU_METRIC_TAG_READ_ERRORS_TOTAL "tag_read_errors_total"
 #define NEU_METRIC_TAG_READ_ERRORS_TOTAL_TYPE NEU_METRIC_TYPE_COUNTER
 #define NEU_METRIC_TAG_READ_ERRORS_TOTAL_HELP "Total number of tag read errors"
 
+// maintained by neuron core
 // number of tags in group
 #define NEU_METRIC_GROUP_TAGS_TOTAL "group_tags_total"
 #define NEU_METRIC_GROUP_TAGS_TOTAL_TYPE NEU_METRIC_TYPE_GAUAGE
 #define NEU_METRIC_GROUP_TAGS_TOTAL_HELP "Total number of tags in the group"
 
 // number of messages sent in group
-#define NEU_METRIC_GROUP_SEND_MSGS "group_send_msgs"
-#define NEU_METRIC_GROUP_SEND_MSGS_TYPE NEU_METRIC_TYPE_COUNTER
-#define NEU_METRIC_GROUP_SEND_MSGS_HELP \
+#define NEU_METRIC_GROUP_SEND_MSGS_TOTAL "group_send_msgs_total"
+#define NEU_METRIC_GROUP_SEND_MSGS_TOTAL_TYPE NEU_METRIC_TYPE_COUNTER
+#define NEU_METRIC_GROUP_SEND_MSGS_TOTAL_HELP \
     "Total number of messages sent in the group"
 
+// maintained by neuron core
 // milliseconds consumed in last group timer invocation
 #define NEU_METRIC_GROUP_LAST_TIMER_MS "group_last_timer_ms"
 #define NEU_METRIC_GROUP_LAST_TIMER_MS_TYPE NEU_METRIC_TYPE_GAUAGE
 #define NEU_METRIC_GROUP_LAST_TIMER_MS_HELP \
-    "Time in milliseconds consumed in last group timer invocation"
+    "Time in milliseconds consumed on last group timer invocation"
+
+// number of messages sent
+#define NEU_METRIC_SEND_MSGS_TOTAL "send_msgs_total"
+#define NEU_METRIC_SEND_MSGS_TOTAL_TYPE NEU_METRIC_TYPE_COUNTER
+#define NEU_METRIC_SEND_MSGS_TOTAL_HELP "Total number of messages sent"
+
+// number of errors encounter while sending messages
+#define NEU_METRIC_SEND_MSG_ERRORS_TOTAL "send_msg_errors_total"
+#define NEU_METRIC_SEND_MSG_ERRORS_TOTAL_TYPE NEU_METRIC_TYPE_COUNTER
+#define NEU_METRIC_SEND_MSG_ERRORS_TOTAL_HELP \
+    "Total number of errors sending messages"
 
 typedef enum {
     NEU_METRICS_CATEGORY_GLOBAL,

plugins/monitor/metric_handle.c

@@ -147,6 +147,25 @@ gen_single_node_metrics(const neu_node_metrics_t *node_metrics, FILE *stream)
     }
 }
 
+static inline bool has_entry(neu_node_metrics_t *node_metrics, const char *name)
+{
+    neu_metric_entry_t * e = NULL;
+    neu_group_metrics_t *g = NULL;
+    HASH_FIND_STR(node_metrics->entries, name, e);
+    if (e) {
+        return true;
+    }
+
+    HASH_LOOP(hh, node_metrics->group_metrics, g)
+    {
+        HASH_FIND_STR(g->entries, name, e);
+        if (e) {
+            return true;
+        }
+    }
+    return false;
+}
+
 static void gen_all_node_metrics(const neu_metrics_t *metrics, int type_filter,
                                  FILE *stream)
 {
@@ -163,6 +182,10 @@ static void gen_all_node_metrics(const neu_metrics_t *metrics, int type_filter,
                 continue;
             }
 
+            if (!has_entry(n, r->name)) {
+                continue;
+            }
+
             if (!commented) {
                 commented = true;
                 fprintf(stream, "# HELP %s %s\n# TYPE %s %s\n", r->name,

src/adapter/adapter.c

@@ -71,6 +71,10 @@ static const adapter_callbacks_t callback_funs = {
     REGISTER_METRIC(adapter, NEU_METRIC_TAG_READS_TOTAL, 0); \
     REGISTER_METRIC(adapter, NEU_METRIC_TAG_READ_ERRORS_TOTAL, 0)
 
+#define REGISTER_APP_METRICS(adapter)                        \
+    REGISTER_METRIC(adapter, NEU_METRIC_SEND_MSGS_TOTAL, 0); \
+    REGISTER_METRIC(adapter, NEU_METRIC_SEND_MSG_ERRORS_TOTAL, 0);
+
 neu_adapter_t *neu_adapter_create(neu_adapter_info_t *info)
 {
     int                     rv          = 0;
@@ -115,6 +119,9 @@ neu_adapter_t *neu_adapter_create(neu_adapter_info_t *info)
         neu_adapter_driver_init((neu_adapter_driver_t *) adapter);
         break;
     case NEU_NA_TYPE_APP:
+        if (adapter->module->display) {
+            REGISTER_APP_METRICS(adapter);
+        }
         break;
     }
 

src/adapter/driver/driver.c

@@ -399,7 +399,7 @@ int neu_adapter_driver_add_group(neu_adapter_driver_t *driver, const char *name,
                               NEU_METRIC_GROUP_TAGS_TOTAL,
                               neu_group_tag_size(find->group));
         REGISTER_GROUP_METRIC(&driver->adapter, find->name,
-                              NEU_METRIC_GROUP_SEND_MSGS, 0);
+                              NEU_METRIC_GROUP_SEND_MSGS_TOTAL, 0);
         REGISTER_GROUP_METRIC(&driver->adapter, find->name,
                               NEU_METRIC_GROUP_LAST_TIMER_MS, 0);