WebSphere Enterprise Service Bus, Version 6.2.0 Operating Systems: AIX, HP-UX, i5/OS, Linux, Solaris, Windows


Dynamic invocation with wired HTTP import, using SMO

How to enable dynamic invocation of an endpoint with a wired HTTP data binding import, using SMO.

Introduction

You can invoke services by using endpoints that are different to those specified in the import. For HTTP bindings, you can specify a dynamic endpoint using a URL that conforms to the HTTP URI standard.
Figure 1. Illustration of endpoint override by dynamic invocation using SMO, with wired import
A message flows through a module and through the import binding to a Web service. Information in the message can override the endpoint dynamically.

You create a mediation module that includes the dynamic endpoint, by performing tasks in WebSphere® Integration Developer.

Creating a dynamic invocation with an HTTP endpoint

To create a mediation module that includes the dynamic endpoint, perform the following tasks:
  1. Create Mediation Module 1, containing an Export, a mediation flow component, and an HTTP Import. The export is of any type.
  2. Connect the Mediation Module import to static SvcProvider 1.
  3. Create SvcProvider 2.
  4. Check that SvcProvider 1 and SvcProvider 2 have the same port type.
  5. Check that the callout node has dynamic endpoint invocation override enabled.
  6. Deploy the modules to the server.

Using dynamic invocation

Dynamic invocation takes place when the export is invoked with a message containing routing criteria that resolve to SvcProvider 2. The mediation flow component identifies the routing criteria in the message. The mediation flow component uses the Message Element Setter primitive to set the new target address in the SMO, using the incoming message content and routing criteria. Alternatively, the mediation flow component might use the Business Object Map or XSL Transformation primitives to set the new target address.

A one-way invocation message works the same way as a two-way message, except that no response message is returned.

A runtime exception occurs if an invalid target address is set in the SMO header. The exception is thrown by the import, and returned in the response flow.


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Timestamp icon Last updated: 21 June 2010


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