# Tutorial: Designing a Purchase Order Processing System by Using AquaLogic Integrator

# Accessing ALSB Proxy Service and Exposing a JPD

This part describes how to access ALSB proxy service using ALSB Control and exposing a JPD using the Business Service Endpoints after you have done the following:

1. Creating the workspace UseCase, as in Loading the Sample Application .
2. Importing the sample application as described in Loading the Sample Application.
3. Deleting the following artifacts:

- `PurchaseOrderFulfillmentJPD.biz` from UsecaseWeb\ServiceAccess\BusinessServices
- `ServiceProviderAccessContract.wsdl` from UsecaseWeb\UsecaseWeb\src\alint\process
- `ServiceProviderAccessControl.java` from UsecaseWeb\UsecaseWeb\src\alint\process folder

To rebuild ALSB Control and the business service endpoints, see the following topics:

- Creating a PurchaseOrder Fulfillment System and Invoking External Services.
- Creating Business Service Endpoint for PurchaseOrderFulfillmentJPD.