Struct Program 

pub struct Program {
    pub filename: String,
    pub workspace: String,
    pub cells: HashMap<u32, Cell>,
}

This is what sits in state as long as the program is running when a new request is made, it will check if the same cell has been executed by checking cells which is a HashMap

Terms

• temp_dir: Whatever the OS temp directory is
• filename: Last executed filename so we can restart state if necessary
• cells: VS Code name for a notebook cell

Fields

filename: String

workspace: String

cells: HashMap<u32, Cell>

Implementations

impl Program

pub fn new() -> Program

Create a new program which is retained in state between http requests

pub fn create_cell(&mut self, cr: &CodeRequest)

Initial cell creation if it doesn’t exist yet Contents Use clone as we need to retain a pointer to data that will stick around after the request has finished

pub fn update_cell(&mut self, cr: &CodeRequest)

As the cells are implemented with a HashMap this is a fast lookup, Only updates what’s required

pub fn write_to_file(&mut self, fragment: u32)

First sorts the hashmap by index into a vector, then writes the output with rustkernel-start and rustkernel-end to determine which cell’s was executing

pub fn run(&self) -> String

Run the program by running cargo run in the temp directory then uses regex to determine what part of the output to send back to the caller

pub fn fmt(&self)

Trait Implementations

impl Debug for Program

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

Formats the value using the given formatter.