Skip to main content
Version: 7.3

SubscriptionManager

class SubscriptionManager<S extends SubscriptionConstructable> implements Manager

Orchestrates all subscriptions; ensuring fresh data without overfetching.

implements

SubscriptionManager implements Manager

constructor(Subscription: S)​

Subscription is the class that will be used to handle subscriptions to each endpoint. Each instance represents one subscription to a specific unique endpoint.

Consumed Actions​

  • 'rest-hooks/subscribe'
  • 'rest-hooks/unsubscribe'

Subscription​

Subscription is a class that implements SubscriptionConstructable. Subscription instances handle the actual subscriptions.

/** Properties sent to Subscription constructor */
export interface SubscriptionInit {
  schema: Schema;
  fetch: () => Promise<any>;
  url: string;
  frequency?: number;
}

/** Interface handling a single resource subscription */
interface Subscription {
  add(frequency?: number): void;
  remove(frequency?: number): boolean;
  cleanup(): void;
}

/** The static class that constructs Subscription */
interface SubscriptionConstructable {
  new (init: SubscriptionInit, dispatch: React.Dispatch<any>): Subscription;
}

add(frequency?: number): void​

Adds a new subscription at the provided frequency for the resource.

remove(frequency?: number): boolean​

Removes a subscription for the given frequency. Returns true if there are no more subscriptions after. This is used to clean up unused Subscriptions.

cleanup(): void​

Provides any cleanup of dangling resources after Subscription is no longer in use.

Included implementation​

Note​

Implementing your own Subscription to handle websockets can be done by dispatching rest-hooks/receive actions with the data it gets to update. Be sure to handle connection opening in the constructor and close the connection in cleanup()