waPC Pool

This crate implements a multi-threaded pool of waPC hosts. You'll typically use the HostPoolBuilder to create a HostPool and use .call() to initiate requests as you would on a standard WapcHost.

The HostPool has basic elasticity built in. Specify the minimum number of threads to start with and the maximum number to grow to. Give the pool a max_wait duration before starting a new worker and a max_idle duration to auto-kill workers above the minimum size.

```rust use std::fs::read;

use wapc::WapcHost; use wapccodec::messagepack::{deserialize, serialize}; use wapcpool::HostPoolBuilder;

[tokio::main]

async fn main() -> anyhow::Result<()> { let file = read("../../wasm/crates/wapc-guest-test/build/wapcguesttest.wasm")?;

let engine = wasmtime_provider::WasmtimeEngineProvider::new(&file, None)?;

let pool = HostPoolBuilder::new() .name("pool example") .factory(move || { let engine = engine.clone(); WapcHost::new(Box::new(engine), None).unwrap() }) .max_threads(5) .build();

let bytes = pool.call("echo", serialize("Hello!")?).await?;

let result: String = deserialize(&bytes)?;

println!("Wasm module returned: {}", result);

Ok(()) } ```