Struct PkHashmapMethod 

pub struct PkHashmapMethod { /* private fields */ }

Available on crate feature std only.

A wrapper for std::collections::HashMap that implements the PkMethodAccessor trait.

Note: This is only available when the std feature is enabled.

Note for Method Implementation type

The type Box<dyn Fn(Option<Vec<u8>>) -> Pin<Box<dyn Pollable>>> (as appeared in the second field of the tuple that new() accepts) is a boxed closure that takes an optional Vec<u8> as input, and returns a pinned Pollable. This allows method implementations to perform background work and return a Pollable that becomes ready when the work is complete.

The library provides some helper types for the Pollable trait:

• Sync, based on threads: PkPromise.
• Async with Tokio: TokioFuturePollable.
• Async with Smol: SmolFuturePollable.

And simply boxing them should work.

Example with PkPromise

use pk_command::{PkHashmapMethod, PkPromise};
let methods = PkHashmapMethod::new(vec![(
    String::from("LONGT"),
    Box::new(|param| {
        PkPromise::execute(|resolve| {
            // do_something_with(param);
            resolve(b"task complete".to_vec());
        })
    }),
)]);

Implementations

impl PkHashmapMethod

pub fn new( init_vec: Vec<(String, Box<dyn Fn(Option<Vec<u8>>) -> Pin<Box<dyn Pollable>>>)>, ) -> Self

Creates a new PkHashmapMethod instance.

Arguments

• init_vec: A vector of tuples containing method keys and their corresponding implementation closures.

Trait Implementations

impl PkMethodAccessor for PkHashmapMethod

fn call( &self, key: String, param: Vec<u8>, ) -> Result<Pin<Box<dyn Pollable>>, String>

Calls a method with the given parameters.