Service activator

Camel acts as a service activator, using BeanProcessor, which sits between the caller and the actual bean.

The BeanProcessor is a special processor that converts the inbound exchange to a method invocation on a bean (POJO).

The BeanProcessor performs the following steps when called:

1. It looks up the bean in the registry.
2. It selects the method to invoke the bean.
3. It binds to the parameters of the selected method.
4. It actually invokes the method.
5. It possibly handles any invocation errors that occurred.
6. It sets the method's reply as the body of the output message.