graft.log module

exception graft.log.AppendError

Bases: ValueError

Raised by append() when an invalid graft.model.Index is passed

graft.log.append(log, after, *entries)

Append entries to log after the given index.

Parameters

• log (Map) – Log object to append entries to.

• after (Index) – Log index after which entries will be appended.

Raises

AppendError –

If the operation is unsuccessful, which can happen if after index does not exist in the given log. Unless index.key is 0 (the origin). For example:

>>> index = model.Index(key=2, term=4)
>>> assert log[2].term == index.term  # index and term match existing entry
>>> index = model.Index(key=0, term=4)  # will work since index it's origin

Return type

Map

graft.log.new()

Create a new, empty log.

Return type

Map