Struct pueue_lib::state::State

pub struct State {
    pub tasks: BTreeMap<usize, Task>,
    pub groups: BTreeMap<String, Group>,
}

This is the full representation of the current state of the Pueue daemon.

This includes

• The currently used settings.
• The full task list
• The current status of all tasks
• All known groups.

However, the State does NOT include:

• Information about child processes
• Handles to child processes

That information is saved in the daemon’s TaskHandler.

Most functions implemented on the state shouldn’t be used by third party software. The daemon is constantly changing and persisting the state.
Any changes applied to a state and saved to disk, will most likely be overwritten after a short time.

The daemon uses the state as a piece of shared memory between it’s threads. It’s wrapped in a MutexGuard, which allows us to guarantee sequential access to any crucial information, such as status changes and incoming commands by the client.

Fields

tasks: BTreeMap<usize, Task>

All tasks currently managed by the daemon.

groups: BTreeMap<String, Group>

All groups with their current state a configuration.

Implementations

impl State

pub fn new() -> State

Create a new default state.

pub fn add_task(&mut self, task: Task) -> usize

Add a new task

pub fn change_status(&mut self, id: usize, new_status: TaskStatus)

A small helper to change the status of a specific task.

pub fn create_group(&mut self, name: &str) -> &mut Group

Add a new group to the daemon.
This also check if the given group already exists. Create a state.group entry and a settings.group entry, if it doesn’t.

pub fn remove_group(&mut self, group: &str) -> Result<(), Error>

Remove a group. This also iterates through all tasks and sets any tasks’ group to the default group if it matches the deleted group.

pub fn set_status_for_all_groups(&mut self, status: GroupStatus)

Set the group status (running/paused) for all groups including the default queue.

pub fn task_ids_in_group(&self, group: &str) -> Vec<usize>

Get all ids of task inside a specific group.

pub fn filter_tasks<F>( &self, condition: F, task_ids: Option<Vec<usize>> ) -> FilteredTasks

where F: Fn(&Task) -> bool,

This checks, whether some tasks match the expected filter criteria.
The first result is the list of task_ids that match these statuses.
The second result is the list of task_ids that don’t match these statuses.

By default, this checks all tasks in the current state. If a list of task_ids is provided as the third parameter, only those tasks will be checked.

pub fn filter_tasks_of_group<F>( &self, condition: F, group: &str ) -> FilteredTasks

where F: Fn(&Task) -> bool,

Same as State::filter_tasks, but only checks for tasks of a specific group.

Trait Implementations

impl Clone for State

fn clone(&self) -> State

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for State

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

Formats the value using the given formatter.

impl Default for State

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for State

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for State

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for State

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for State

impl StructuralPartialEq for State