We want to have two types of persistence handles that store data on
disk:
for sensitive data (e.g. keys) we don't want any data to be removed,
but archived instead, we also need snapshots, this requires a specific
directory structure with current, archive and snapshot
subdirectories
for regular data (e.g. generated parameters) we want to store and
delete data in a simple directory structure, without current
subdirectory.
Here we separate the interfaces for persistence handles:
RWHandle - common interface for reading and saving data
BasicHandle - simple interface for the regular data to save, read and
remove them
ProtectedHandle - for sensitive data (i.e. keystore) to archive and
snapshot instead of delete
We want to have two types of persistence handles that store data on disk:
current,archiveandsnapshotsubdirectoriescurrentsubdirectory.Here we separate the interfaces for persistence handles: