Our application has several service layer methods which only deal with database “A” in most instances; however occasionally they also retrieve read-only data from database “B”.
Now let's look at the data flow again from System a to B through the integration layer.
现在让我们再次看看从System A通过集成层到System B的数据流。
3
System A is a data system that publishes its data to integration layer which relays the data to downstream systems such as System B using Web services.
System A 是使用 Web 服务将其数据发布到集成层的数据系统，而集成层使用 Web 服务将数据中继转发到下游系统，如 System B。