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Invoking a WSDL-based web service through the WSIF API

The Web Services Invocation Framework (WSIF) provides a Java API for invoking web services, independent of the format of the service, or the transport protocol through which it is invoked.

WSIF includes an EJB provider for EJB invocation that uses the Remote Method Invocation over Internet Inter-ORB Protocol (RMI-IIOP). However, for EJB(IIOP)-based web service invocation, invoke RMI-IIOP Web services using JAX-RPC instead.

Ensure that the application uses only one thread to call WSIF.

The WSIF API supports the invocation of WSDL-defined web services. WSIF is intended for use in both WSIF clients and web service intermediaries.

The WSIF API is driven by the abstract service description in WSDL; it is completely independent of the binding used. This independence makes the API more natural to work with because it uses WSDL terms to refer to message parts, operations, and other items.

The WSIF API was designed for the WSDL usage model:

  1. Select a port that supports the port type that we need.

  2. Invoke the operation by providing the necessary abstract input message consisting of the required parts, without worrying about how the message is mapped to a specific binding protocol.

Other web service APIs, for example SOAP APIs, are not designed on WSDL, but for a specific binding protocol with its associated syntax; for example, target URIs and encoding styles.

The main WSIF API interfaces are described in the following procedure.

Apache no longer supports WSIF.


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Related concepts

  • Web Services Invocation Framework (WSIF)