Struct WorkerExchange 

pub struct WorkerExchange {
    pub handle: Handle,
    pub senders: HashMap<u32, LinkSender>,
    pub receivers: Vec<LinkReceiver>,
}

This worker’s exchange endpoints for a multi-process run: one LinkSender per peer worker it sends to, and one LinkReceiver per peer it receives from (established by the membership handshake before start). Graph::start runs with none of this — a single-worker run where every edge is a local SyncSender; the multi-process path is Graph::start_worker, which derives the actual edge wiring from the placement.

The mechanism is identical either way — an out-edge is a bounded SyncSender, drained by the dest task (local) or by an OutboundBridge (remote); an InboundBridge delivers a decoded (edge, msg) into the local dest inbox exactly as a local outlet would. Edge ids agree across workers because every worker builds the same graph in the same order, so the edge on the wire names the same logical edge — and thus the same dest task — on both ends.

Fields

handle: Handle

The tokio runtime the bridges drive (block_on). Must be multi-threaded: its workers run the links’ socket tasks while the bridge threads block on them.

senders: HashMap<u32, LinkSender>

A link to each peer worker this worker sends edges to, keyed by that worker’s id.

receivers: Vec<LinkReceiver>

A link from each peer this worker receives edges from; each delivers its frames as (edge, msg) into local inboxes, routed by the edge’s target task.