EventBroker.Registry (Anoma v0.32.0)
I am the Registry for the PubSub system.
I am the central registry of all the topic subscriptions and filters. I am responsible for spawning filter agents, (un)subscribing to them, and keeping track of relations between them.
Subscriptions
When a process with pid p subscribes to a filter spec [f, g], a "filter
agent" will be spawned for both f and g.
A filter agent is a process that receives events, and only forwards the events that match its filter.
If a filter spec list is subscribed to for which any prefix already has an existing filter agent, these are not spawned. The existing filter agents will be used instead.
Registered Filters
When a process subscribes to a filter spec list,
Summary
Types
I am the type of the registered subscribers. I map a subscriber pid to all their filter specs.
I am the type of the Registry.
Functions
I am the type of the registered filters, matching a filter agent to its PID.
Returns a specification to start this module under a supervisor.
Types
registered_filters()
@type registered_filters() :: %{required(EventBroker.filter_spec_list()) => pid()}
registered_subscribers()
@type registered_subscribers() :: %{ required(pid()) => [EventBroker.filter_spec_list()] }
I am the type of the registered subscribers. I map a subscriber pid to all their filter specs.
@type t() :: %EventBroker.Registry{ registered_filters: registered_filters(), registered_subscribers: registered_subscribers(), supervisor: atom() }
I am the type of the Registry.
My main functionality is to keep track of all spawned filter actors.
Fields
:supervisor- The name of the dynamic supervisor launched on start.:registered_filters- The map whose keys are a filter-spec dependency list and whose values are PID's of filter agents corresponding to said lists.:registered_subscribers- The map whose keys are a subscriber PID mapped onto their filter specs. Default: %{}
Functions
I am the type of the registered filters, matching a filter agent to its PID.
child_spec(init_arg)
Returns a specification to start this module under a supervisor.
See Supervisor.
start_link(args)
@spec start_link(list()) :: GenServer.on_start()