Struct Task 

pub struct Task {
    pub id: String,
    pub name: String,
    pub category: String,
    pub priority: i32,
    pub deadline: Option<i64>,
    pub release_time: Option<i64>,
    pub activities: Vec<Activity>,
    pub attributes: HashMap<String, String>,
}

A task (job) to be scheduled.

Contains one or more activities and scheduling metadata (priority, deadlines). Activities within a task may have precedence constraints forming a DAG.

Time Representation

All times are in milliseconds relative to a scheduling epoch (t=0). The consumer defines what t=0 means (e.g., shift start, midnight UTC).

Fields

id: String

Unique task identifier.

name: String

Human-readable name.

category: String

Task category (for transition matrix lookups and grouping).

priority: i32

Scheduling priority (higher = more important).

deadline: Option<i64>

Latest completion time (ms). None = no deadline.

release_time: Option<i64>

Earliest start time (ms). None = available immediately.

activities: Vec<Activity>

Activities (operations) that compose this task.

attributes: HashMap<String, String>

Domain-specific key-value metadata.

Implementations

impl Task

pub fn new(id: impl Into<String>) -> Self

Creates a new task with the given ID.

pub fn with_name(self, name: impl Into<String>) -> Self

Sets the task name.

pub fn with_category(self, category: impl Into<String>) -> Self

Sets the task category.

pub fn with_priority(self, priority: i32) -> Self

Sets the scheduling priority.

pub fn with_deadline(self, deadline_ms: i64) -> Self

Sets the deadline (latest completion time in ms).

pub fn with_release_time(self, release_ms: i64) -> Self

Sets the release time (earliest start time in ms).

pub fn with_activity(self, activity: Activity) -> Self

Adds an activity to this task.

pub fn with_attribute( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Adds a domain-specific attribute.

pub fn total_duration_ms(&self) -> i64

Total processing duration across all activities (ms).

pub fn has_activities(&self) -> bool

Whether this task has any activities.

pub fn activity_count(&self) -> usize

Number of activities.

Trait Implementations

impl Clone for Task

fn clone(&self) -> Task

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Task

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Task

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Task

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

where __S: Serializer,

Serialize this value into the given Serde serializer.