karavan-demo/postman/project/CustomProcessor.java

import org.apache.camel.BindToRegistry;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;

@BindToRegistry("myBean")
public class CustomProcessor implements Processor {

  public void process(Exchange exchange) throws Exception {
      exchange.getIn().setBody("Hello world");
  }
}