// NewContextFactory returns a ContextFactory capable of creating execution contexts backed
// by the supplied unit's supplied API connection.
func NewContextFactory(
state *uniter.State,
unitTag names.UnitTag,
tracker leadership.Tracker,
getRelationInfos RelationsFunc,
storage StorageContextAccessor,
paths Paths,
clock clock.Clock,
) (
ContextFactory, error,
) {
unit, err := state.Unit(unitTag)
if err != nil {
return nil, errors.Trace(err)
}
machineTag, err := unit.AssignedMachine()
if err != nil {
return nil, errors.Trace(err)
}
model, err := state.Model()
if err != nil {
return nil, errors.Trace(err)
}
zone, err := unit.AvailabilityZone()
if err != nil {
return nil, errors.Trace(err)
}
f := &contextFactory{
unit: unit,
state: state,
tracker: tracker,
paths: paths,
modelUUID: model.UUID(),
envName: model.Name(),
machineTag: machineTag,
getRelationInfos: getRelationInfos,
relationCaches: map[int]*RelationCache{},
storage: storage,
rand: rand.New(rand.NewSource(time.Now().Unix())),
clock: clock,
zone: zone,
}
return f, nil
}
