BPEL - One Request Multiple Responses

In this chapter, we will learn about the concept of One Request and Multiple Responses.

• The Client BPEL Process sends a single request to the Service BPEL Process and receives multiple responses in return.

  For example, the request can be to order a product online, and the first response can be the estimated delivery time, the second response a payment confirmation, and the third response a notification that the product has shipped. In this example, the number and types of responses are expected.

• The Client BPEL Process needs an invoke activity to send the request, and a sequence activity with three receive activities.

• The Service BPEL Process needs a receive activity to accept the message from the client, and a sequence attribute with three invoke activities, one for each reply.

• As with all partner activities, the Web Services Description Language (WSDL) file defines the interaction.