This documentation is for WSO2 Enterprise Service Bus version 4.8.0 . View documentation for the latest release.

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A mediator is a full-powered processing unit in the ESB. At run-time, a mediator has access to all the parts of the ESB along with the current message and can do virtually anything with the message.

When adding a mediator to a sequence, you can configure the mediator in design view or in source view, which allows you to edit the source XML (different mediators have their own XML configurations). Mediators in a sequence can be one of the following types: