When you have created an XI 3.0-Compatible Service Interface (SI) in the Enterprise Services Repository (ESR), you can create and configure Web service providers and consumers which use the Integration Server (IS) as a broker. The Java Web service providers and consumers communicate with the IS over an XI 3.0 protocol by using the Java Proxy Runtime and the Web Service Runtime.
More Information about the Java Proxy runtime: Java Proxy Runtime
Create and configure a synchronous or an asynchronous Web service provider (XI 3.0-compatible inbound proxy) for brokered communication.
In this case, the IS can be viewed as a service consumer.
More information: Creating and Configuring Web Service Providers
Create and configure a synchronous or an asynchronous Web service consumer (XI 3.0-compatible outbound proxy) for brokered communication.
In this case, the IS can be viewed as a service provider.
More information: Creating and Configuring Web Service Consumers