Struct SharedAdapterResource 

pub struct SharedAdapterResource { /* private fields */ }

Push B sibling of LegacyAdapterResource — wraps an Arc<dyn DriverAdapter> but declares can_share()=true. Used when an adapter has registered a crate::adapter::SharedDriverRegistration opting it into pool-shared semantics. The pool caches the underlying Arc<dyn DriverAdapter> and hands the same clone to every phase whose params produce the same ResourceKey.

close() drops the wrapped adapter Arc — the actual teardown timing is governed by the underlying DriverAdapter’s Drop. Push D will add real async close() to specific driver instances (e.g. awaiting cass_session_close()’s CassFuture for the cassandra-cpp engine).

Implementations

impl SharedAdapterResource

pub fn new(key: ResourceKey, adapter: Arc<dyn DriverAdapter>) -> Self

pub fn adapter(&self) -> Option<Arc<dyn DriverAdapter>>

Trait Implementations

impl SharedResource for SharedAdapterResource

fn can_share(&self) -> bool

Push B: this wrapper declares the adapter shareable. The pool keeps one instance per ResourceKey and returns the same Arc to every matching attach.

fn accessor_payload(&self) -> Option<Arc<dyn Any + Send + Sync>>

SRD-104 — surface the wrapped adapter’s accessor payload (SRD-103’s CQL session handle for the cql adapter). The pool captures this right after init and hands clones to kernel nodes by fingerprint. The pool-shared wrapper owns no payload itself; it delegates to the adapter, which builds one over its connected session. None for adapters that don’t opt in (the trait default).

fn resource_key(&self) -> &ResourceKey

The structural identity of this resource.

fn close(self: Arc<Self>) -> ResourceFuture<'static, Result<(), String>>

Symmetric teardown. Called when the entry’s refcount hits zero. MUST block until network / kernel resources are actually released — no async-Drop races, no sockets in TIME_WAIT being counted as closed, no libuv worker thread races.

fn as_legacy_adapter(&self) -> Option<Arc<dyn DriverAdapter>>

Bridge for the Push A legacy-adapter shim. Default returns None; only LegacyAdapterResource overrides it to surface its wrapped DriverAdapter handle. Push B retires this entirely once each adapter has its own SharedResource impl with no hidden DriverAdapter inside.

fn can_support_more_load(&self) -> bool

Live capacity — can this instance accept another concurrent caller right now without substantial contention?

fn init(&self) -> ResourceFuture<'_, Result<(), String>>

Optional async init beyond what construction already did. Called by the pool on first attach for a key, exactly once per (key, generation).