Drafter.Runtime.Shared (drafter v0.3.1)

Runtime backend for shared multi-user sessions (e.g. an SSH chat served to many clients).

Wraps the Callback backend but routes app state changes through a the shared-state server: when the app produces new state, it is pushed to the shared server, which broadcasts {:shared_state_updated, state} to every connected session. Each session merges its per-session mount_props over the shared state and re-renders, so all clients stay in sync while keeping their own view-local props.

Selected per shared session at runtime, via the session's process dictionary, rather than by the app module. The same app can run standalone or shared.

Summary

Functions

handle_input(app, event, state)

Runs the app's handle_event/2 and pushes any new state to the shared server.

handle_message(app, name, data, state)

Runs the app's handle_event/3 and pushes any new state to the shared server.

mount(app, props)

The current shared state merged with this session's props.

on_message(app, msg, state)

Adopts a broadcast {:shared_state_updated, new_state} as this session's state.

ready(app, state)

Delegates to Drafter.Runtime.Callback.ready/2.

refresh_rate(app)

Delegates to Drafter.Runtime.Callback.refresh_rate/1.

scroll_active(app, state)

Delegates to Drafter.Runtime.Callback.scroll_active/2.

scroll_idle(app, state)

Delegates to Drafter.Runtime.Callback.scroll_idle/2.

timer(app, timer_id, state)

Delegates to Drafter.Runtime.Callback.timer/3.

Functions

handle_input(app, event, state)

@spec handle_input(module(), term(), term()) :: term()

Runs the app's handle_event/2 and pushes any new state to the shared server.

The result is returned unchanged; only {:ok, state} and {:ok, state, actions} trigger a broadcast.

handle_message(app, name, data, state)

@spec handle_message(module(), atom(), term(), term()) :: term()

Runs the app's handle_event/3 and pushes any new state to the shared server.

Broadcasts under the same conditions as handle_input/3.

mount(app, props)

@spec mount(module(), map()) :: term()

The current shared state merged with this session's props.

With no shared-state server in the process dictionary, falls back to Drafter.Runtime.Callback.mount/2. Where both carry a key, props wins.

on_message(app, msg, state)

@spec on_message(module(), term(), term()) :: term()

Adopts a broadcast {:shared_state_updated, new_state} as this session's state.

This session's :drafter_mount_props are merged over the incoming state, so view-local props survive a broadcast. Any other message delegates to Drafter.Runtime.Callback.on_message/3.

ready(app, state)

@spec ready(module(), term()) :: term()

Delegates to Drafter.Runtime.Callback.ready/2.

refresh_rate(app)

@spec refresh_rate(module()) :: Drafter.Runtime.refresh_rate()

Delegates to Drafter.Runtime.Callback.refresh_rate/1.

scroll_active(app, state)

@spec scroll_active(module(), term()) :: term()

Delegates to Drafter.Runtime.Callback.scroll_active/2.

scroll_idle(app, state)

@spec scroll_idle(module(), term()) :: term()

Delegates to Drafter.Runtime.Callback.scroll_idle/2.

timer(app, timer_id, state)

@spec timer(module(), term(), term()) :: term()

Delegates to Drafter.Runtime.Callback.timer/3.

Timer results are not broadcast to other sessions.