reckon_db_leader_tracker (reckon_db v1.6.0)

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Leader tracker for reckon-db

Tracks subscriptions and coordinates with pg groups.

Responsibilities: - Observe subscription changes via tracker_group - Start emitter pools when subscriptions are created (on leader) - Stop emitter pools when subscriptions are deleted (on leader) - Update emitter pools when subscriptions are modified (on leader)

Since Khepri triggers execute on the leader node, this module coordinates emitter lifecycle with subscription changes.

Summary

Types

store_config/0
subscription/0
subscription_type/0

Functions

handle_call(Request, From, State)
handle_cast(Msg, State)
handle_info(Info, State)
init(Store_config)
start_link(Store_config)
terminate(Reason, State)

Types

store_config/0

-type store_config() ::
          #store_config{store_id :: atom(),
                        data_dir :: string(),
                        mode :: single | cluster,
                        timeout :: pos_integer(),
                        writer_pool_size :: pos_integer(),
                        reader_pool_size :: pos_integer(),
                        gateway_pool_size :: pos_integer(),
                        options :: map()}.

subscription/0

-type subscription() ::
          #subscription{id :: binary(),
                        type :: subscription_type(),
                        selector :: binary() | map(),
                        subscription_name :: binary(),
                        subscriber_pid :: pid() | undefined,
                        created_at :: integer(),
                        pool_size :: pos_integer(),
                        checkpoint :: non_neg_integer() | undefined,
                        options :: map()}.

subscription_type/0

-type subscription_type() ::
          stream | event_type | event_pattern | event_payload | tags | by_stream | by_event_type |
          by_event_pattern | by_event_payload | by_tags.

Functions

handle_call(Request, From, State)

handle_cast(Msg, State)

handle_info(Info, State)

init(Store_config)

start_link(Store_config)

-spec start_link(store_config()) -> {ok, pid()} | {error, term()}.

terminate(Reason, State)