shard-crystal-db/src/db/disposable.cr

24 lines
539 B
Crystal

module DB
# Generic module to encapsulate disposable db resources.
module Disposable
macro included
@closed = false
end
# Closes this object.
def close
return if @closed
do_close
@closed = true
end
# Returns `true` if this object is closed. See `#close`.
def closed?
@closed
end
# Implementors overrides this method to perform resource cleanup
# If an exception is raised, the resource will not be marked as closed.
protected abstract def do_close
end
end