Refactor one-before retrieve

crates/netpod/src/netpod.rs

@@ -3,6 +3,7 @@ pub mod histo;
 pub mod query;
 pub mod range;
 pub mod status;
+pub mod stream_impl_tracer;
 pub mod streamext;
 pub mod ttl;
 
@@ -116,6 +117,12 @@ pub const DATETIME_FMT_9MS: &str = "%Y-%m-%dT%H:%M:%S.%9fZ";
 
 const TEST_BACKEND: &str = "testbackend-00";
 
+#[allow(non_upper_case_globals)]
+pub const trigger: [&'static str; 1] = [
+    //
+    "S30CB05-VMCP-A010:PRESSURE",
+];
+
 pub struct OnDrop<F>
 where
     F: FnOnce() -> (),

crates/netpod/src/stream_impl_tracer.rs

@@ -0,0 +1,43 @@
+use crate::log::*;
+
+pub struct StreamImplTracer {
+    name: String,
+    npoll_cnt: usize,
+    npoll_max: usize,
+    loop_cnt: usize,
+    loop_max: usize,
+}
+
+impl StreamImplTracer {
+    pub fn new(name: String, npoll_max: usize, loop_max: usize) -> Self {
+        Self {
+            name,
+            npoll_cnt: 0,
+            npoll_max,
+            loop_cnt: 0,
+            loop_max,
+        }
+    }
+
+    pub fn poll_enter(&mut self) -> bool {
+        self.npoll_cnt += 1;
+        if self.npoll_cnt >= self.npoll_max {
+            trace!("{}  poll {} reached limit", self.name, self.npoll_cnt);
+            true
+        } else {
+            trace!("{}  poll {}", self.name, self.npoll_cnt);
+            false
+        }
+    }
+
+    pub fn loop_enter(&mut self) -> bool {
+        self.loop_cnt += 1;
+        if self.loop_cnt >= self.loop_max {
+            trace!("{}  loop {} reached limit", self.name, self.loop_cnt);
+            true
+        } else {
+            trace!("{}  loop {}", self.name, self.loop_cnt);
+            false
+        }
+    }
+}