Struct juju::Config

pub struct Config { /* fields omitted */ }

A HashMap representation of the charm's config.yaml, with some extra features: - See which values in the HashMap have changed since the previous hook. - For values that have changed, see what the previous value was. - Store arbitrary data for use in a later hook.

Methods

impl Config

fn new() -> Result<Self, JujuError>

Create a new Config and automatically load the previous config values if the .juju-persistent-config is present The .juju-persistent-config is also saved automatically when this struct is dropped.

fn get(self, key: &str) -> Result<String, JujuError>

Return the current value for this key

fn changed(self, key: &str) -> Result<bool, JujuError>

Return true if the current value for this key is different from the previous value.

fn previous(self, key: &str) -> Option<String>

Return previous value for this key, or None if there is no previous value.

Trait Implementations

impl Debug for Config

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Drop for Config

fn drop(&mut self)

A method called when the value goes out of scope.