Struct InMemoryTopicRegistry 

pub struct InMemoryTopicRegistry { /* private fields */ }

Registry for subscription topics.

Stores topic definitions and evaluates which topics match a given resource event.

Implementations

impl InMemoryTopicRegistry

pub fn new() -> Self

Creates an empty topic registry.

pub fn add_topic(&self, topic: TopicDefinition)

Registers a topic definition.

pub fn remove_topic(&self, canonical_url: &str) -> bool

Removes a topic by canonical URL.

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

Returns all registered topic canonical URLs.

pub fn get_topic(&self, canonical_url: &str) -> Option<TopicDefinition>

Returns a topic definition by canonical URL.

pub fn matching_topics( &self, resource_type: &str, event_type: ResourceEventType, ) -> Vec<TopicMatch>

Evaluates which topics match a resource event.

Checks all registered topics’ resource triggers against the event’s resource type and interaction type.

pub fn parse_topic_resource( resource: &Value, ) -> Result<TopicDefinition, SubscriptionError>

Parses a SubscriptionTopic FHIR resource (JSON) into a TopicDefinition.

Works for R4B, R5, and R6 native SubscriptionTopic resources.

pub fn parse_r4_backport_basic_topic_resource( resource: &Value, ) -> Result<Option<TopicDefinition>, SubscriptionError>

Parses an R4 backport Basic topic into a TopicDefinition.

Returns:

• Ok(Some(topic)) when the resource is a strict backport topic
• Ok(None) when the resource is Basic but not a topic
• Err when the resource is marked as a topic but malformed

Trait Implementations

impl Default for InMemoryTopicRegistry

fn default() -> Self

Returns the “default value” for a type.