Zond

Zond is crate with standard rust collections but with collecting statistics.

Ok, maybe it contains only analogue of [Vec] - zvec::ZVec. And ok, ZVec contains only some part of Vec methods. But I made this just for fun. I don't know anyone who would really need this.

Example

Let's start from constructing collection.

Constructors similar to their std analogues' constructors but have additional argument - struct Zond with two fields:

1. zond_handler of type ZondHandler.
   Trait object with single method that consumes two arguments: id as usize and operations as Operations. All operations handling is hapeppening here: you can save them to file or database, send to your server or just print to console.
2. policy of type Policy.
   Desribes the rules about when collected operations will handled by zond_handler.

So at first let's implement some ZondHandler. It will just print operations to stdout:

struct HandlerImpl;

impl<T: OperationType + Debug> ZondHandler<T> for HandlerImpl {
    fn handle(&self, id: usize, operations: Operations<T>) {
        println!("{id} collected");
        operations
            .iter()
            .for_each(|v| println!("{:?}: {:?}", v.get_instant(), v.get_type()));
        println!();
    }
}

Next let's construct Zond with HandlerImpl handler and such a policy that operations will be handled after each three method calls.
It will handle operations for ZVec:

let zond: Zond<ZVecOperation<usize>> = Zond::new(
    HandlerImpl,
    Policy::on_count_operations(NonZeroUsize::new(3).unwrap()),
);

Next let's construct ZVec with zond variable:

let mut zvec: ZVec<usize> = ZVec::new(zond);

Finally let's execute some operations:

zvec.push(1);
zvec.push(2);
zvec.push(5);
zvec.push(5);
zvec.extend_from_within(1..);
zvec.dedup();
drop(zvec);

The console output will look like this:

0 collected
Instant { /* */ }: New
Instant { /* */ }: Push { value: 1 }
Instant { /* */ }: Push { value: 2 }

0 collected
Instant { /* */ }: Push { value: 5 }
Instant { /* */ }: Push { value: 5 }
Instant { /* */ }: ExtendFromWithin { src_start_bound: Included(1), src_end_bound: Unbounded }

0 collected
Instant { /* */ }: Dedup

As you can see, operations always being handled when dropping.