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Diffstat (limited to 'guides/source/action_cable_overview.md')
| -rw-r--r-- | guides/source/action_cable_overview.md | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/guides/source/action_cable_overview.md b/guides/source/action_cable_overview.md index 319277ef68..e929945dd0 100644 --- a/guides/source/action_cable_overview.md +++ b/guides/source/action_cable_overview.md @@ -240,8 +240,8 @@ WebNotificationsChannel.broadcast_to( ``` The `WebNotificationsChannel.broadcast_to` call places a message in the current -subscription adapter (by default `redis` for production and `async` for development and -test environments)'s pubsub queue under a separate broadcasting name for each user. +subscription adapter (by default `redis` for production and `async` for development and +test environments)'s pubsub queue under a separate broadcasting name for each user. For a user with an ID of 1, the broadcasting name would be `web_notifications:1`. The channel has been instructed to stream everything that arrives at @@ -530,7 +530,7 @@ Action Cable has two required configurations: a subscription adapter and allowed ### Subscription Adapter By default, Action Cable looks for a configuration file in `config/cable.yml`. -The file must specify an adapter and a URL for each Rails environment. See the +The file must specify an adapter for each Rails environment. See the [Dependencies](#dependencies) section for additional information on adapters. ```yaml @@ -543,7 +543,28 @@ test: production: adapter: redis url: redis://10.10.3.153:6381 + channel_prefix: appname_production ``` +#### Adapter Configuration + +Below is a list of the subscription adapters available for end users. + +##### Async Adapter + +The async adapter is intended for development/testing and should not be used in production. + +##### Redis Adapter + +Action Cable contains two Redis adapters: "normal" Redis and Evented Redis. Both +of the adapters require users to provide a URL pointing to the Redis server. +Additionally, a channel_prefix may be provided to avoid channel name collisions +when using the same Redis server for multiple applications. See the [Redis PubSub documentation](https://redis.io/topics/pubsub#database-amp-scoping) for more details. + +##### PostgreSQL Adapter + +The PostgreSQL adapter uses Active Record's connection pool, and thus the +application's `config/database.yml` database configuration, for its connection. +This may change in the future. [#27214](https://github.com/rails/rails/issues/27214) ### Allowed Request Origins |