export declare class ApolloRedisPublisherPlugin {
    private static self;
    private publisher;
    private readonly REDIS_URL;
    static init(url?: string): ApolloRedisPublisherPlugin;
    static get instance(): ApolloRedisPublisherPlugin;
    term(): Promise<void>;
    publish(channel: string, message: string): Promise<void>;
    private constructor();
    plugin(): {
        serverWillStart(): Promise<{
            serverWillStop(): Promise<void>;
        }>;
    };
}
export declare class ApolloRedisSubscriberPlugin {
    private static self;
    private subscriber;
    private readonly REDIS_URL;
    static init(url?: string): ApolloRedisSubscriberPlugin;
    static get instance(): ApolloRedisSubscriberPlugin;
    termSubscriber(): Promise<void>;
    private constructor();
    subscribe(channel: string): Promise<void>;
    plugin(): {
        serverWillStart(): Promise<{
            drainServer(): Promise<void>;
        }>;
    };
}