Struct ChildSpecification 

pub struct ChildSpecification<S = WorkerSpec> { /* private fields */ }

A specification for a process to be added to a Supervisor.

A child specification describes how the supervisor should create and manage a child: the underlying future that represents the process, along with metadata such as its name and shutdown strategy. All processes in a supervisor, whether a worker or a (nested) supervisor, are represented by a ChildSpecification.

A specification is a description, not a control surface: it carries no public methods of its own. There are two ways to obtain one, matching the two levels of control:

• Pass a worker or supervisor directly to add_worker, spawn, or SupervisorHandle::spawn, all of which accept a Supervisor or any Supervisable and convert it for you, applying the defaults appropriate to that kind of child – including the shutdown strategy that lets a nested supervisor drain its whole subtree.
• Configure one with ChildBuilder, which is the only way to set a restart policy, significance, placement, or a shutdown deadline. The builder exposes only the settings that make sense for the kind of child being described, and build hands the result to add_worker.

Supervisors have no per-child settings of their own, so there is nothing to configure for a nested supervisor.

Trait Implementations

impl From<Supervisor> for ChildSpecification<SupervisorSpec>

fn from(supervisor: Supervisor) -> Self

Converts to this type from the input type.

impl<T> From<T> for ChildSpecification<WorkerSpec>

where T: Supervisable + 'static,

fn from(worker: T) -> Self

Converts to this type from the input type.