Abstract: Certain aspects of the present disclosure provide techniques for processing north-south queries in an application programming interface (API) generated for a plurality of associated services. The method generally includes receiving a request to invoke a function exposed by a first service in the API, wherein the function commits data to one or more data repositories. A data record is generated by the first service based on the received request based on a data object definition and a service definition for the first service. A message is generated including the generated data record and an indication that the message is to be consumed by a data lake processing system to commit data to a data lake. The message is published on a message bus for consumption by the data lake processing system.

Abstract: Certain aspects of the present disclosure provide techniques for processing east-west queries in an application programming interface (API) generated for a plurality of associated services. The method generally includes receiving, at a request gateway from a requesting service, a request to invoke a function exposed by a first service through the API. References to entities defined in a declarative schema for one or more second services are identified based on identifiers included a record retrieved from a data repository for an entity returned by the function. A message is published on a message bus to the one or more second services to retrieve information related to the referenced entities. A response message including objects associated with the referenced entities is consumed. The function is executed based on the objects associated with the referenced entities, and the result generated by executing the function is returned to the requesting service.

Abstract: Certain aspects of the present disclosure provide techniques for processing north-south queries in an application programming interface (API) generated for a plurality of associated services. The method generally includes receiving a request to invoke a function exposed by a first service in the API, wherein the function commits data to one or more data repositories. A data record is generated by the first service based on the received request based on a data object definition and a service definition for the first service. A message is generated including the generated data record and an indication that the message is to be consumed by a data lake processing system to commit data to a data lake. The message is published on a message bus for consumption by the data lake processing system.

Abstract: Certain aspects of the present disclosure provide techniques for processing east-west queries in an application programming interface (API) generated for a plurality of associated services. The method generally includes receiving, at a request gateway from a requesting service, a request to invoke a function exposed by a first service through the API. References to entities defined in a declarative schema for one or more second services are identified based on identifiers included a record retrieved from a data repository for an entity returned by the function. A message is published on a message bus to the one or more second services to retrieve information related to the referenced entities. A response message including objects associated with the referenced entities is consumed. The function is executed based on the objects associated with the referenced entities, and the result generated by executing the function is returned to the requesting service.

Abstract: Certain aspects of the present disclosure provide techniques for generating an application programming interface (API) for a plurality of associated services. The method generally includes retrieving a declarative schema for a service of a plurality of services in an application programming interface (API). A language object for the service is generated from a data object definition in the declarative schema associated with the service. Generally, the language object is configured to handle data events generated by the service. A service controller for the service is generated from a service definition in the declarative schema associated with the respective service. Generally, the service controller is fronted by a gateway for external sources to invoke one or more functions implemented by the service. An application programming interface (API) is exposed for the service independently of details of APIs for the associated services to one or more external services.

Abstract: Systems and methods for generating responses to queries from a client application are disclosed. One example method includes receiving a first query from the client application, determining an authorization context for the first query based at least in part on a set of authorization restrictions corresponding to the client application, generating a response to the first query based at least in part on an intermediate response generated by a query engine, the response redacted based at least in part on the authorization context, and providing the response to the client application.

Abstract: Certain aspects of the present disclosure provide techniques for generating an application programming interface (API) for a plurality of associated services. The method generally includes retrieving a declarative schema for a service of a plurality of services in an application programming interface (API). A language object for the service is generated from a data object definition in the declarative schema associated with the service. Generally, the language object is configured to handle data events generated by the service. A service controller for the service is generated from a service definition in the declarative schema associated with the respective service. Generally, the service controller is fronted by a gateway for external sources to invoke one or more functions implemented by the service. An application programming interface (API) is exposed for the service independently of details of APIs for the associated services to one or more external services.

Abstract: An online music purchasing system and method is disclosed, in which a radio service operates on a user's computer and is configured for receiving and playing digital radio representations of media content in near real-time in a radio session. A content server is configured for serving the digital radio representations of media content to the radio service, and a radio sequence server is configured for serving a sequential list of currently-playing and previously-played media content of the radio session to the radio service. An account server is configured for receiving a signal indicative of a user's desire to purchase a file of one of a currently-playing or previously-played media content. A download manager is configured for downloading the file to the user's computer according to the signal indicative of the user's desire to purchase the file.