What feature enables real-time event-based processing in MuleSoft?

The feature that enables real-time event-based processing in MuleSoft is Webhooks. Webhooks allow applications to send real-time data to other applications whenever a specific event occurs. This facilitates a proactive way of handling information, as opposed to periodic polling or batch processing, which may create latency in data availability.

By leveraging Webhooks, developers can set up an endpoint that automatically receives events as they occur, enabling seamless integration and immediate reaction to data changes. In scenarios where immediate responsiveness to events is crucial, Webhooks serve to push data to other systems in real time, ensuring that everything stays synchronized without the need for manual intervention.

Other options like Global Elements, Batch Processing, and Message Queuing serve different purposes within a Mule application architecture. Global Elements are reusable configurations but do not inherently facilitate real-time event processing. Batch Processing deals with large volumes of data in chunks, which is not suitable for real-time needs, and Message Queuing generally pertains to asynchronous communication rather than real-time event notification. Therefore, the best choice for enabling real-time event-based processing is through the use of Webhooks.