Читать книгу Google Cloud Certified Professional Cloud Architect Study Guide - Dan Sullivan - Страница 70

Let's consider how datastores and microservices architectures can influence systems integration.

Online games, like those produced by Mountkirk Games, use more than one type of datastore. Player data, such as the player's in-game possessions and characteristics, could be stored in a document database like Cloud Datastore, while the time-series data could be stored in Bigtable, and billing information may be kept in a transaction processing relational database. Architects should consider how data will be kept complete and consistent across datastores. For example, if a player purchases a game item, then the application needs to ensure that the item is added to the player's possession record in the player database and that the charge is authorized by the payment system. If the payment is not authorized, the possession should not be available to the player.

Mountkirk Games uses a microservices architecture. Microservices are single services that implement one single function of an application, such as storing player data or recording player actions. An aggregation of microservices implements an application. Microservices make their functions accessible through application programming interfaces (APIs). Depending on security requirements, services may require that calls to their API functions are authenticated. High-risk services, such as a payment service, may require more security controls than other services. Cloud Endpoints may help to manage APIs and help secure and monitor calls to microservices.