Struct Connection 

pub struct Connection { /* private fields */ }

Live client handle to a server endpoint, evaluating expressions over a transport EvalSite.

Implementations

impl Connection

pub fn new( address: ServerAddress, default_codec: Symbol, supported_codecs: Vec<Symbol>, site: Arc<dyn EvalSite>, ) -> Result<Self>

Opens a connection with default role and isolation policy.

pub fn with_session( address: ServerAddress, default_codec: Symbol, supported_codecs: Vec<Symbol>, site: Arc<dyn EvalSite>, role: Option<Symbol>, isolation: IsolationPolicy, ) -> Result<Self>

Opens a connection with an explicit role and isolation policy, verifying the address transport is available before constructing the initial session.

pub fn address(&self) -> &ServerAddress

Returns the remote address this connection targets.

pub fn default_codec(&self) -> &Symbol

Returns the codec used by default for outbound frames.

pub fn supported_codecs(&self) -> &[Symbol]

Returns the codecs this connection is willing to negotiate.

pub fn site(&self) -> &Arc<dyn EvalSite>

Returns the underlying eval site that carries frames.

pub fn session(&self) -> Session

Returns a snapshot of the current session, or a closed placeholder if the lock is poisoned.

pub fn role(&self) -> Option<&Symbol>

Returns the role symbol attached to outbound frames, if any.

pub fn request( &self, cx: &mut Cx, expr: Expr, timeout: Option<Duration>, required_capabilities: Vec<CapabilityName>, ) -> Result<Value>

Evaluates expr remotely and returns its result value, using the connection’s default consistency.

pub fn send( &self, cx: &mut Cx, expr: Expr, codec: Symbol, deadline: Option<Duration>, required_capabilities: Vec<CapabilityName>, reply_codec_hint: Option<Symbol>, ) -> Result<u64>

Sends expr as a request frame without awaiting a synchronous result, returning the assigned message id for later correlation. Uses the connection’s default consistency.

pub fn notify( &self, cx: &mut Cx, expr: Expr, codec: Symbol, deadline: Option<Duration>, required_capabilities: Vec<CapabilityName>, ) -> Result<()>

Sends expr as a one-way notify frame, expecting no correlated reply.

pub fn receive(&self, _timeout: Option<Duration>) -> Result<Option<ServerFrame>>

Pops the next buffered inbound frame, if one is queued.

Returns Error::PoisonedLock when the router’s queue mutex is poisoned, rather than panicking.

pub fn close(&self, cx: &mut Cx) -> Result<()>

Closes the connection and marks its session closed.

Trait Implementations

impl Clone for Connection

fn clone(&self) -> Connection

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl EvalFabric for Connection

fn realize(&self, cx: &mut Cx, request: EvalRequest) -> Result<EvalReply>

Evaluates request and returns its reply.

impl Object for Connection

fn display(&self, _cx: &mut Cx) -> Result<String>

Render the object as a human-readable display string.

fn as_any(&self) -> &dyn Any

Expose the object for Rust downcasting.

fn header(&self) -> &ObjectHeader

Identity and trust header for the object; defaults to the shared anonymous header.

fn op(&self, _key: &OpKey) -> Option<&dyn Op>

Resolve the operation registered under key, if any.

fn claims( &self, _cx: &mut Cx, _pattern: &ClaimPattern, _sink: &mut dyn ClaimSink, ) -> Result<(), Error>

Emit the object’s claims matching pattern into sink.

fn snapshot(&self, _cx: &mut Cx) -> Result<Option<Datum>, Error>

Optional content-addressable snapshot of the object’s state.

impl ObjectCompat for Connection

fn class(&self, cx: &mut Cx) -> Result<ClassRef>

Class object this value belongs to; defaults to nil.

fn as_expr(&self, cx: &mut Cx) -> Result<Expr>

Expression form of the object; defaults to an opaque extension node.

fn as_table(&self, cx: &mut Cx) -> Result<Value>

Project the object into a table value; the default exposes its display.

fn as_eval_fabric(&self) -> Option<&dyn EvalFabric>

Eval-fabric view, if the object is a distributed eval surface.

fn as_callable(&self) -> Option<&dyn Callable>

Callable view, if the object can be invoked.

fn as_class(&self) -> Option<&dyn Class>

Class view, if the object is a class.

fn as_shape(&self) -> Option<&dyn Shape>

Shape view, if the object is a shape.

fn as_object_encoder(&self) -> Option<&dyn ObjectEncode>

Object-encoder view, if the object encodes other objects.

fn as_read_constructor(&self) -> Option<&dyn ReadConstructor>

Read-constructor view, if the object decodes data forms.

fn as_number_domain(&self) -> Option<&(dyn NumberDomain + 'static)>

Number-domain view, if the object is a number domain.

fn as_number_value(&self) -> Option<&dyn NumberValue>

Number-value view, if the object is a domain number.

fn as_stream(&self) -> Option<&dyn Stream>

Stream view, if the object is a stream.

fn as_sequence(&self) -> Option<&dyn Sequence>

Sequence view, if the object is a sequence.

fn as_thunk(&self) -> Option<&dyn Thunk>

Thunk view, if the object is a deferred computation.

fn as_list(&self) -> Option<&(dyn ListValue + 'static)>

List view, if the object is a list value.

fn as_table_impl(&self) -> Option<&(dyn Table + 'static)>

Table-implementation view, if the object is a table.

fn as_dir(&self) -> Option<&(dyn Dir + 'static)>

Directory view, if the object is a directory.

fn truth(&self, _cx: &mut Cx) -> Result<bool, Error>

Truthiness of the object; defaults to true.

fn publish_shape_satisfaction_claims( &self, _cx: &mut Cx, _shape: &Ref, ) -> Result<bool, Error>

Publish claims asserting that the object satisfies shape; returns whether any were published.