Using TCP Adapters with Ensemble - InterSystems Documentation

Using the TCP Counted Outbound AdapterFigure 3–1: Business Operation and Using the TCP Counted Outbound AdapterThe figure above shows the flow of a request from Ensemble out to an external system after you have set up an Ensemblebusiness operation to work with an outbound adapter. The sequence is as follows:1. At production startup, Ensemble creates a background process for each business operation in the production configuration.Ensemble can allocate more than one background process per business operation. The business operation’sconfigured PoolSize specifies the number of background processes.2. Within each background process, Ensemble creates an instance of the business operation class and an instance of itsassociated outbound adapter class.3. Ensemble calls the OnInit() methods of the business operation object and outbound adapter object, respectively.4. Thereafter, whenever the production is running and the business operation is enabled and scheduled to be active, thefollowing sequence can occur:• The business operation receives an Ensemble request message.• The business operation’s message map matches the Ensemble request type with a business operation method.Note:The developer of each business operation class is responsible for writing its message map and methods.For instructions, see the next section, “Using the Adapter.”• The business operation method calls a method in the associated outbound adapter object.• The adapter method sends a request to the external system. If this request generates an acknowledgment or responseof some kind, the outbound adapter relays that data back to the business operation method that invoked it.• If the original Ensemble request message requires a response, the business operation returns it.14 Using TCP Adapters with Ensemble