Struct Channel 

pub struct Channel { /* private fields */ }

One kind of request and its answers.

Implementations

impl Channel

pub fn request_path(&self, state_dir: &Path) -> PathBuf

Where a single-slot channel’s request lives.

pub fn take(&self, state_dir: &Path) -> Vec<String>

Takes the pending requests and returns their identifiers. Taking one is deleting it, so a request is answered once.

pub fn answer<T: Serialize>( &self, state_dir: &Path, request: &str, outcome: Result<T, String>, ) -> Result<()>

The service’s answer to request.

Errors

The answer could not be encoded or written.

pub fn read_answer<T: DeserializeOwned>( &self, state_dir: &Path, request: &str, ) -> Option<Result<T, String>>

The service’s answer to request, once it has given one.

pub fn ask<T: DeserializeOwned>( &self, state_dir: &Path, wait: Wait, ) -> Result<T, AskError>

Asks the service and waits for its answer.

Errors

AskError, naming which half of the exchange did not happen.

pub fn ask_with<T: DeserializeOwned>( &self, state_dir: &Path, wait: Wait, sent: impl FnOnce(), ) -> Result<T, AskError>

Self::ask, calling sent once the request is in place, so the command can say it is waiting.

Errors

As Self::ask.

Trait Implementations

impl Clone for Channel

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Channel

impl Debug for Channel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Channel

impl PartialEq for Channel

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Channel