A proxy service is a virtual service that receives messages and optionally processes them before forwarding them to a service at a given endpoint. This approach allows you to perform necessary transformations and introduce additional functionality without changing your existing service. For example, if you want to use WS-Security with an existing, unsecured service, you can create a secure proxy service with WS-Security enabled with a specified security policy. Additionally, if you want a service to handle messages that are in different formats, you can create a Transformer proxy service to transform requests and responses based on specified XSLT configurations. A proxy service can also switch transports, process the messages with mediation sequences and tasks, and terminate the flow or send a message back to the client even without sending it to the actual service.
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