Struct NodeContext 

pub struct NodeContext<'a> { /* private fields */ }

The single-node view handed to a task step: virtual time, a seeded stream, the network, the node’s disk, and the scenario event log.

Implementations

impl NodeContext<'_>

pub fn node(&self) -> NodeId

The node this task runs on.

pub fn now(&self) -> Micros

Global virtual time.

pub fn node_now(&self) -> i64

Node-local time with the node’s skew schedule applied.

pub fn rng(&mut self) -> &mut SimRng

The task’s own seeded stream (forked at spawn).

pub fn send(&mut self, to: NodeId, payload: impl Into<Vec<u8>>) -> SendOutcome

Sends a message, recording send/drop/duplicate/reorder events.

pub fn try_recv(&mut self) -> Option<Message>

Pops the oldest message from this node’s inbox, if any.

pub fn disk_append( &mut self, path: &str, bytes: &[u8], ) -> Result<usize, DiskError>

Appends to a file’s pending stage, recording the outcome.

pub fn disk_fsync(&mut self, path: &str) -> Result<(), DiskError>

Fsyncs a file, recording the outcome.

pub fn disk_read(&self, path: &str) -> Vec<u8>

Live view of a file: durable bytes plus pending bytes.

pub fn disk_read_durable(&self, path: &str) -> Vec<u8>

Crash-recovery view of a file: exactly the fsynced prefix.

pub fn log(&mut self, message: impl Into<String>)

Records an application-level event in the scenario log.