Struct H2SessionCache 

pub struct H2SessionCache<K> { /* private fields */ }

HTTP/2 session cache with generic connection keys.

Uses DashMap<K, Mutex<H2ConnectionState>> to provide per-key serialization. The DashMap shard lock is held only briefly (to look up or insert the entry), while the per-key Mutex serializes concurrent same-key calls to parse(). This prevents the remove-and-reinsert race where two threads would both create default state for the same key, losing one thread’s HPACK table.

Implementations

impl<K: Hash + Eq + Clone> H2SessionCache<K>

pub fn new() -> Self

Create a new cache

pub fn parse( &self, key: K, buffer: &[u8], ) -> Result<HashMap<StreamId, ParsedH2Message>, ParseError>

Parse buffer with connection state

If the connection key doesn’t exist, creates new state automatically. Returns completed HTTP/2 messages indexed by stream_id. The map may be empty if no streams completed yet — this is not an error.

pub fn remove(&self, key: &K) -> Option<H2ConnectionState>

Remove connection state (call when connection closes)

pub fn contains(&self, key: &K) -> bool

Check if connection state exists

pub fn len(&self) -> usize

Get number of tracked connections

pub fn is_empty(&self) -> bool

Check if cache is empty

Trait Implementations

impl<K: Hash + Eq + Clone> Default for H2SessionCache<K>

fn default() -> Self

Returns the “default value” for a type.