NewHydro initailizes a new Hydro instance.

NewHydroEvent initializes a new HydroEvent instance.

Hydro is the simplest wal implementation.

HydroEvent indicates a log event.

Closer is the interface that groups the Close methods.

EventHandler is the interface that groups a few methods.

Logger is the interface that wraps the basic Log method.

Recoverer is the interface that wraps the basic Recover method.

Registry is the interface that wraps the basic Register method.

WAL is the interface that groups the Register and Recover interfaces.

Commit is a function for committing an event log.