The file store is a persistent cache where event files are saved until the polling adapter can process them. The adapter uses file store to track inbound files in the system. Each time a file is created, updated, or deleted the adapter updates the status of the file in the file store.
The file store mechanism provides the following advantages
for the adapter:
- When multiple adapters are running in a clustered environment, the file store enables sharing of file processing work. Also, it avoids duplicate file processing by multiple adapter instances.
- The adapter can process large files (files of any size).
When the adapter polls the local file system, it creates
an entry in the file store for each event file that matches the search
criteria specified in the activation specification properties. The
adapter records the status of each new entry as NEW in
the event table.
Figure 1. File management flow 