Module export 

Exported journals and replay testing.

fusee export <dir> <workflow-id> writes a run’s journal to a .fjnl file, and fusee export --sample 1000 <dir> takes the most recent runs whose whole journal is available (running and suspended runs, and finished runs of engines opened with keep_history). A Replayer runs new workflow code against exported journals, without running any step function or timer, and reports the first difference by step name. Run it in CI before a deploy.

File format: FUSEEJNL, a little-endian u32 format version, a length-prefixed JSON header (workflowId, workflowType, version, status), then the journal’s canonical records.

Structs

ExportedJournal

A journal read from an export file.

ReplayReport

What replaying one journal found.

Replayer

Runs workflow code against exported journals.

Constants

FORMAT

MAGIC

Functions

export_from_dir

Exports from a data directory without changing it: the directory is copied (checkpoints first, so the copy is consistent even while an engine writes to it) and the copy is recovered and read.

file_name

A file name for an exported journal (workflow IDs may hold /).