IBM BPM, V8.0.1, All platforms > Get started with IBM BPM > Key concepts > Bindings > Binding types > JMS bindings
Handling exceptions
The way in which the binding is configured determines how exceptions that are raised by data handlers or data bindings are handled. Additionally, the nature of the mediation flow dictates the behavior of the system when such an exception is thrown.
A variety of problems can occur when a data handler or data binding is called by your binding.
For example, a data handler might receive a message that has a corrupted payload, or it might try to read a message that has an incorrect format.
The way your binding handles such an exception is determined by how you implement the data handler or data binding. The recommended behavior is that you design your data binding to throw a DataBindingException.
When any runtime exception, including a DataBindingException, is thrown:
- If the mediation flow is configured to be transactional, the JMS message , by default, is stored in the Failed Event Manager for manual replay or deletion.
You can change the recovery mode on the binding so that the message is rolled back instead of being stored in the Failed Event Manager.
- If the mediation flow is not transactional, the exception is logged and the message is lost.
The situation is similar for a data handler. Since the data handler is invoked by the data binding, any data handler exception is wrapped into a data binding exception. Therefore a DataHandlerException is reported to you as a DataBindingException.