String) throws -> Node? func save(node: Node, with key: String, expiration: TimeInterval) throws } public class RedisService : CacheService { private let drop: Droplet public init(drop: Droplet) throws { try drop.addProvider(VaporRedis.Provider(config: drop.config)) self.drop = drop } public func load(for key: String) throws -> Node? { return try drop.cache.get(key) } public func save(node: Node, with key: String, expiration: TimeInterval) throws { try drop.cache.set(key, node) if let redisCache = drop.cache as? RedisCache { try redisCache.redbird.command("EXPIRE", params: [key, "\(Int(expiration))"]) } } } 98