added json doc-comment

crates/api-grub/src/export.rs

@@ -5,6 +5,7 @@ use tokio_postgres::NoTls;
 use std::env;
 use anyhow::Result;
 use log::{info, error};
+use std::ops::Drop;
 
 /// An entity which handles DB connections.
 /// 
@@ -101,4 +102,10 @@ impl Exporter {
         Ok(metrics.get_bytes_len())
     }
 
+}
+
+impl Drop for Exporter {
+    fn drop(&mut self) {
+        info!("Deinitializng Exporter and DB connection pool ...")
+    }
 }

crates/api-grub/src/json.rs

@@ -2,6 +2,21 @@
 use serde_json::{json, Value};
 use integr_structs::api::v3::{Metric, MetricOutput};
 
+/// A JSON-parser struct 
+/// 
+/// Using in metric extracting from Server Response 
+/// with metrics mechanism
+/// 
+/// # Example
+/// 
+/// ```
+/// use api-grub::json::JsonParser;
+/// use use integr_structs::api::v3::Metric;
+/// 
+/// let json = b""flat1" : { "room1" : { "rt_tempo" : "+16" }}".to_vec();
+/// 
+/// assert!(!JsonParser::parse(vec![Metric::template()], json).is_empty());
+/// ```
 pub struct JsonParser;
 
 impl JsonParser {

crates/integr-structs/src/api.rs

@@ -160,6 +160,16 @@ pub mod v3 {
         pub json_type : String,
         pub addr : String,
     }
+    impl Metric {
+        pub fn template() -> Self {
+            Self {
+                id : "room_tempo".to_string(),
+                json_type : "String".to_string(),
+                addr : "flat1.room1.rt_tempo".to_string(),
+            }
+        }
+    }
+
     #[derive(Serialize, Deserialize, Clone, Debug)]
     pub struct Metrics {
         pub name : String,