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use handle::h1::{admit, types};
use crate::{
app::{
inputs,
serve::{self, handle},
spec,
},
macros::tokens::local,
runtime::paths::Paths,
};
pub(super) struct Routes {
pub(super) body_data_arms: Vec<proc_macro2::TokenStream>,
pub(super) body_work_arms: Vec<proc_macro2::TokenStream>,
pub(super) pending_resume_arms: Vec<proc_macro2::TokenStream>,
pub(super) finish_arms: Vec<proc_macro2::TokenStream>,
pub(super) resume_arms: Vec<proc_macro2::TokenStream>,
pub(super) cancel_arms: Vec<proc_macro2::TokenStream>,
pub(super) ready_cancel: proc_macro2::TokenStream,
}
impl Routes {
pub(super) fn new<'view, 'source, 'spec>(
paths: &Paths,
context: &handle::Context<'view, 'source, 'spec>,
h1: &handle::H1Plan<'source, 'spec>,
types: &types::Types<'_>,
) -> Self {
let [f_state, f_life, f_cache] = ["state", "lifecycle", "response_cache"].map(local);
let [f_gzip, f_time, f_makers] = ["gzip", "timer", "task_producers"].map(local);
let symbols = &context.plan.spec.state_generics;
let [n_tasks, v_body, v_date] = symbols.locals(["__tasks", "body", "date"]);
let [v_error, v_exch, v_exec] = symbols.locals(["error", "exchange", "execution"]);
let [v_finish, v_result] = symbols.locals(["finish", "outcome"]);
let [v_output, v_wait, v_permit] = symbols.locals(["output", "pending", "permit"]);
let [v_ready, v_run, v_sess] = symbols.locals(["ready", "runtime", "session"]);
let [v_this, v_write] = symbols.locals(["this", "write"]);
let ns_core = &paths.core;
let ns_fiber = &paths.fiber;
let ns_h1 = &paths.h1;
use quote::quote;
let state_ty = types.names.state_ty;
let task_id = &context.exec.identity;
let runtime = &types.routing.runtime;
let duplex = &types.protocol.duplex_ty;
let cont = &h1.continuations;
let owner = cont.route();
let ready = cont.ready();
let built = cont.ready_route();
let work: Vec<_> = cont
.bodies()
.map(|route| {
let variant = &route.pending_variant;
match &route.mode {
serve::Mode::Fiber { .. } => quote! {
#owner::#variant(ref #v_wait) => #v_wait.has_work()
},
_ => quote! { #owner::#variant(_) => false },
}
})
.collect();
let pending: Vec<_> = cont
.bodies()
.map(|route| {
let variant = &route.pending_variant;
match &route.mode {
serve::Mode::Fiber { .. } => quote! {
#owner::#variant(#v_wait) => #v_wait
.resume(#ns_core::life::Mode::body(#v_this.#f_life, #v_exch))
.map(#owner::#variant)
},
_ => quote! {
#owner::#variant(#v_wait) =>
::core::result::Result::Ok(#owner::#variant(#v_wait))
},
}
})
.collect();
let body: Vec<_> = cont
.bodies()
.map(|route| {
let variant = &route.pending_variant;
match &route.mode {
serve::Mode::Fiber { fiber, .. } => {
let method = match fiber.body {
inputs::Body::Discarded => quote!(try_discard),
inputs::Body::Json
| inputs::Body::Segmented
| inputs::Body::Contiguous => quote!(try_retain),
};
quote! {
#owner::#variant(#v_wait) => {
#v_wait
.#method(
#v_body,
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
)
.map(#owner::#variant)
}
}
}
serve::Mode::Sync { .. }
| serve::Mode::Stream { .. }
| serve::Mode::Duplex { .. } => {
quote! {
#owner::#variant(mut #v_wait) => {
match #v_wait.push_body(
#v_body,
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
) {
::core::result::Result::Ok(()) =>
::core::result::Result::Ok(#owner::#variant(#v_wait)),
::core::result::Result::Err(#v_error) => {
#v_wait.cancel(#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
));
let #v_error = #ns_h1::wire::Failure::Assembly(#v_error);
#ns_core::life::Mode::diagnostic(#v_this.#f_life, &#v_error);
::core::result::Result::Err(#v_error.body())
}
}
}
}
}
}
})
.collect();
let mut resume = Vec::new();
let finish: Vec<_> = cont
.bodies()
.map(|route| {
let pending = &route.pending_variant;
match &route.mode {
serve::Mode::Sync { cache } => {
let cache = syn::Index::from(*cache);
quote! {
#owner::#pending(#v_wait) => {
let #v_output = #ns_h1::wire::output::Egress::new(
#v_write, #v_date, #v_wait.response(),
);
#v_wait.finish::<#state_ty, _, _>(
#v_body,
#v_permit,
*#v_this.#f_state,
#ns_h1::route::sync::Egress::new(
#v_output,
#ns_h1::wire::cache::Cache::new(
&mut #v_this.#f_cache[#cache],
),
#v_this.#f_gzip,
),
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
)
}
}
}
serve::Mode::Fiber { task, fiber } => {
let task = serve::Task::new(route, task);
let prod = syn::Index::from(fiber.slot);
let tasks = task.path().route(&context.plan.spec.state_generics);
let source = admit::fiber(
paths,
context,
task,
runtime,
quote!(*#v_this.#f_state),
quote! {
<#ns_fiber::manifold::runtime::Direct as
#ns_fiber::manifold::runtime::Runnable
>::handle(#v_this.#f_time)
},
quote!(#v_this.#f_makers.#prod),
);
let settle = quote! {
match #v_result {
#ns_h1::session::BodyOutcome::Complete(#v_result) => #v_result,
#ns_h1::session::BodyOutcome::Pending(#v_wait) => {
return #ns_h1::session::BodyOutcome::Pending(#ready {
exchange: #v_exch,
route: #built::#pending(#v_wait),
});
}
}
};
resume.push(quote! {
#built::#pending(#v_wait) => {
let mut #n_tasks = #tasks;
let #v_result = #v_wait.resume(
#v_permit,
#v_run,
#source,
#ns_core::life::Mode::body(#v_this.#f_life, #v_exch),
);
#settle
}
});
quote! {
#owner::#pending(#v_wait) => {
let mut #n_tasks = #tasks;
let #v_result = #v_wait.finish(
#v_body,
#v_permit,
#v_run,
#source,
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
);
#settle
}
}
}
serve::Mode::Stream { task } => {
let task = serve::Task::new(route, task);
let tasks = task.path().route(&context.plan.spec.state_generics);
let source = admit::stream(
paths,
&context.plan.spec.state_generics,
task_id,
runtime,
&task.variant(),
);
quote! {
#owner::#pending(#v_wait) => {
let mut #n_tasks = #tasks;
let #v_output = #ns_h1::wire::output::Egress::new(
#v_write, #v_date, #v_wait.response(),
);
let #v_exec = #ns_h1::route::stream::Execution::new(
#v_output,
*#v_this.#f_state,
#v_run,
#source,
);
let #v_result = #v_wait.finish::<
#state_ty,
_,
_,
_,
_,
_,
>(
#v_body,
#v_permit,
#v_exec,
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
);
#v_result
}
}
}
serve::Mode::Duplex { family } => {
let wrapped = h1.duplex.wrap(*family, false, quote!(#v_sess));
quote! {
#owner::#pending(#v_wait) => {
let #v_finish = (
*#v_this.#f_state,
|#v_sess| #wrapped,
);
#v_wait.finish::<#state_ty, #duplex, _, _>(
#v_body,
#v_permit,
#v_finish,
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
)
}
}
}
}
})
.collect();
let cancel: Vec<_> = cont
.bodies()
.map(|route| {
let pending = &route.pending_variant;
quote! {
#owner::#pending(#v_wait) => {
#v_wait.cancel(
#ns_core::life::Mode::body(
#v_this.#f_life,
#v_exch,
),
);
#ns_core::life::Outcome::Cancelled
}
}
})
.collect();
let cleanup = if context.exec.fibers().is_empty() {
quote!(match #v_ready {})
} else {
let arms = context
.plan
.entries
.iter()
.filter(|route| route.kind == spec::Kind::Fiber)
.map(|route| {
let variant = &route.pending_variant;
quote! {
#built::#variant(#v_ready) => #v_ready.cancel(
#ns_core::life::Mode::body(#v_this.#f_life, #v_exch),
),
}
});
quote! {
let #v_exch = #v_ready.exchange;
match #v_ready.route { #( #arms )* }
#v_exch.retire(#v_this.#f_life, #ns_core::life::Outcome::Cancelled);
}
};
Self {
body_data_arms: body,
body_work_arms: work,
pending_resume_arms: pending,
finish_arms: finish,
resume_arms: resume,
cancel_arms: cancel,
ready_cancel: cleanup,
}
}
}