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;
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(()) } ```