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 > Email > Overview of WebSphere Adapter for Email > Technical overview of the WebSphere Adapter for Email > Inbound processing
Event store
The event store is a persistent cache where event records are saved until the polling adapter can process them.
The adapter uses an event store to track the inbound events that come into the system. When a new email is found in the polling folder, the adapter updates the status of the corresponding event in the event store. For recovery purposes, the adapter continually maintains the status of the event in the event store until the event is delivered to IBM BPM or WebSphere Enterprise Service Bus.
If the adapter is abruptly terminated, the adapter uses the event store to determine which events have and have not been processed.
An event store is not required for the adapter to process inbound requests. The adapter creates an event store:
- when the module is deployed to the runtime environment. It can happen if the event persistence feature is configured in the external service wizard.
- if it detects that an event store does not exist for the inbound module in the database.
Each event store created by the adapter is associated with a specific inbound module. The adapter does not support multiple adapter modules pointing to the same event store.
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