override the redundancy based on the resizer (#292)

Signed-off-by: பாலாஜி <rbalajis25@gmail.com>

src/bastion/src/children.rs

@@ -314,6 +314,10 @@ impl Children {
         } else {
             self.redundancy = redundancy;
         }
+        #[cfg(feature = "scaling")]
+        {
+            self.resizer.set_lower_bound(self.redundancy as u64);
+        }
 
         self
     }
@@ -383,7 +387,8 @@ impl Children {
     /// # }
     /// ```
     /// [`Resizer`]: ../resizer/struct.Resizer.html
-    pub fn with_resizer(mut self, resizer: OptimalSizeExploringResizer) -> Self {
+    pub fn with_resizer(mut self, mut resizer: OptimalSizeExploringResizer) -> Self {
+        self.redundancy = resizer.lower_bound() as usize;
         self.resizer = Box::new(resizer);
         self
     }

src/bastion/src/resizer.rs

@@ -112,9 +112,23 @@ impl OptimalSizeExploringResizer {
         self.actor_stats.clone()
     }
 
+    /// Returns lower bound of the number of actors in the scaling group.
+    pub(crate) fn lower_bound(&self) -> u64 {
+        self.lower_bound
+    }
+
+    /// Set lower bound of the autoscaling group.
+    pub(crate) fn set_lower_bound(&mut self, lower_bound: u64) {
+        self.lower_bound = lower_bound;
+    }
+
     /// Overrides the minimal amount of actors available to use.
     pub fn with_lower_bound(mut self, lower_bound: u64) -> Self {
-        self.lower_bound = lower_bound;
+        if lower_bound == u64::MIN {
+            self.lower_bound = lower_bound.saturating_add(1);
+        } else {
+            self.lower_bound = lower_bound;
+        }
         self
     }