"tns:BrokerServiceIntf">

... 

...

Code Example 6.2

WSDL for Receiving the Invoices

Although you can modify the EIS systems that participate in Web service

interactions to export the Web service interfaces, a better approach uses a J2EE

connector to plug the EIS system into the J2EE application server. The connector

by its nature does not intrude on the EIS. This latter strategy takes advantage of

the capabilities of the J2EE server. Among other advantages, using connectors

allows the transactional and security contexts of a J2EE application server to carry

forward to the EIS application. Plus, the EIS can use the thread pools of the appli 

cation server. In conjunction with connectors, you use JAX RPC from the J2EE

application server to expose a Web service interface. See Figure 6.6.

E

To expose a Web service interface for an EIS, use JAX RPC in front of a con 

nector.

J2EE 

Application

Server

C nt

Web or EJB

Client

P

EIS

 R oi

component

ector

X

(business logic)

nn

JA endp

Co

Figure 6.6

Using JAX RPC and Connectors