To invoke a Web Service upon sending a message to a channel, there are two options - both of which build upon the Spring Web Services project: SimpleWebServiceOutboundGateway and MarshallingWebServiceOutboundGateway. The former will accept either a String or javax.xml.transform.Source as the message payload. The latter provides support for any implementation of the Marshaller and Unmarshaller interfaces. Both require the URI of the Web Service to be called. simpleGateway = new SimpleWebServiceOutboundGateway(uri); marshallingGateway = new MarshallingWebServiceOutboundGateway(uri, marshaller); For more detail on the inner workings, see the Spring Web Services reference guide's chapter covering client access as well as the chapter covering Object/XML mapping.

To send a message to a channel upon receiving a Web Service invocation, there are two options again: SimpleWebServiceInboundGateway and MarshallingWebServiceInboundGateway. The former will extract a javax.xml.transform.Source from the WebServiceMessage and set it as the message payload. The latter provides support for implementation of the Marshaller and Unmarshaller interfaces. If the incoming web service message is a SOAP message the SOAP Action header will be added to the headers of the Message that is forwarded onto the request channel. simpleGateway = new SimpleWebServiceInboundGateway(uri); simpleGateway.setRequestChannel(forwardOntoThisChannel); simpleGateway.setReplyChannel(listenForResponseHere); //Optional marshallingGateway = new MarshallingWebServiceInboundGateway(marshaller); //set request and optionally reply channel Both gateways implement the Spring Web Services MessageEndpoint interface, so they can be configured with a MessageDispatcherServlet as per standard Spring Web Services configuration. For more detail on how to use these components, see the Spring Web Services reference guide's chapter covering creating a Web Service. The chapter covering Object/XML mapping is also applicable again.

To configure an outbound Web Service Gateway, use the "outbound-gateway" element from the "ws" namespace: ]]> To set up an inbound Web Service Gateway, use the "inbound-gateway": ]]> To use Spring OXM Marshallers and/or Unmarshallers, provide bean references. For outbound: ]]> And for inbound: ]]> Most Marshaller implementations also implement the Unmarshaller interface. When using such a Marshaller, only the "marshaller" attribute is necessary. Even when using a Marshaller, you may also provide a reference for the "request-callback" on the outbound gateways. For either outbound gateway type, the "message-factory" attribute can also be configured with a reference to any Spring Web Services WebServiceMessageFactory implementation. For the simple inbound gateway type, the "extract-payload" attribute can be set to false to forward the entire WebServiceMessage instead of just its payload as a Message to the request channel. This might be useful, for example, when a custom Transformer works against the WebServiceMessage directly.