Struct PkHashmapVariable 

pub struct PkHashmapVariable { /* private fields */ }

Available on crate feature std only.

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

This implementation provides internal mutability and a listener mechanism for variable updates.

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

Implementations

impl PkHashmapVariable

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

Creates a new PkHashmapVariable instance.

Arguments

• init_vec: A vector of tuples, where each tuple contains:
  • String: The variable key.
  • Option<Vec<u8>>: The initial value of the variable. Defaults to an empty Vec<u8> if None.
  • VariableChangeListener: A listener function called when the variable is set.

IMPORTANT: The listener is executed synchronously in the same thread as PkCommand::poll(). If the listener performs heavy computation, it may block the protocol state machine.

Trait Implementations

impl PkVariableAccessor for PkHashmapVariable

fn get(&self, key: String) -> Option<Vec<u8>>

Retrieves the value of a variable.

fn set(&self, key: String, value: Vec<u8>) -> Result<(), String>

Sets the value of a variable.