Struct DependencyGraph 

pub struct DependencyGraph {
    pub startup_order: Vec<String>,
    pub edges: BTreeMap<String, Vec<DependencyEdge>>,
    pub dependents: BTreeMap<String, Vec<String>>,
}

A resolved dependency graph with startup ordering.

Fields

startup_order: Vec<String>

Services in topological order (dependencies first).

edges: BTreeMap<String, Vec<DependencyEdge>>

For each service, the services it must wait for.

dependents: BTreeMap<String, Vec<String>>

Reverse map: for each service, the services that depend on it.

Implementations

impl DependencyGraph

pub fn resolve(config: &TopologyConfig) -> Result<Self>

Resolve dependencies from a topology config into a startup-ordered graph.

Returns an error if circular dependencies are detected.

pub fn shutdown_order(&self) -> Vec<String>

Get the shutdown order (reverse of startup order).

pub fn systemd_deps( &self, service: &str, topology_name: &str, ) -> (Vec<String>, Vec<String>)

Generate systemd unit dependency directives for a service.

Returns (After, Requires) string pairs suitable for systemd unit files.

Trait Implementations

impl Clone for DependencyGraph

fn clone(&self) -> DependencyGraph

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DependencyGraph

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

Formats the value using the given formatter.