gen_persistence: persist the state of your processes

Often we want to persist the state of our Erlang processes so that it can be recovered after a crash, started/restarted on demand (via a supervisor or manually) or migrated in the cluster via a storage provider. To solve it I have created a new small opensource library. With gen_perstistence all events coming to your modules are stored to the disk and replayed on the restart but it’s also possible to store a snapshot of the state to reduce the recovery time. An implementation of gen_statem and gen_server with persistence is also provided.