IBM BPM, V8.0.1, All platforms > Authoring services in Integration Designer > Services and service-related functions > Access external services with adapters > Configure and using adapters > IBM WebSphere Adapters > Adapter Toolkit > Implementing code from the IBM WebSphere Adapter Toolkit > Inbound event notification > Possible event store implementations
Error handling for events
Event error handling depends on the delivery type and the kind of endpoint involved.
If the endpoint throws an exception during delivery, the event manager will stop delivering events to that endpoint, and the timer task for polling stops. If the delivery type is ORDERED, the remaining events polled in that cycle are not delivered until the event with the error is processed. If the delivery type is UNORDERED, the event manager attempts to deliver the remaining events in the current poll cycle. When the endpoint is taken offline and reactivated, the event(s) in which the error occurred is re-delivered, and normal delivery of subsequent events resumes. If the endpoint is transactional and the transaction rolls back, the event manager responds as if the endpoint threw an exception.
If the implementation throws an exception during the getObjectForEvent call (for retrieval of the full event), the event manager marks the status of that event in the event table as ERROR_PROCESSING_EVENT. If the delivery type is ORDERED, the polling task stops until the endpoint is reactivated. If the delivery type is UNORDERED, the polling task continues.