Transaction journals in Prevayler are handled by a Journal object registered via PrevaylerFactory. The Journal interface is defined as this:
The default Journal implementation used is PersistentJournal, which writes transaction journals sequentially, creating one file per Transaction executed. All PersistentJournal-generated file names are exactly 27 characters long, and are numbered sequentially (e.g., 0000000000000000089.journal), and contain a serialized version of that transaction.
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