// NewFactory returns a Factory capable of creating execution contexts backed
// by the supplied unit's supplied API connection.
func NewFactory(
state *uniter.State,
unitTag names.UnitTag,
tracker leadership.Tracker,
getRelationInfos RelationsFunc,
storage StorageContextAccessor,
paths Paths,
) (
Factory, error,
) {
unit, err := state.Unit(unitTag)
if err != nil {
return nil, errors.Trace(err)
}
service, err := state.Service(unit.ServiceTag())
if err != nil {
return nil, errors.Trace(err)
}
ownerTag, err := service.OwnerTag()
if err != nil {
return nil, errors.Trace(err)
}
machineTag, err := unit.AssignedMachine()
if err != nil {
return nil, errors.Trace(err)
}
environment, err := state.Environment()
if err != nil {
return nil, errors.Trace(err)
}
return &factory{
unit: unit,
state: state,
tracker: tracker,
paths: paths,
envUUID: environment.UUID(),
envName: environment.Name(),
machineTag: machineTag,
ownerTag: ownerTag,
getRelationInfos: getRelationInfos,
relationCaches: map[int]*RelationCache{},
storage: storage,
rand: rand.New(rand.NewSource(time.Now().Unix())),
}, nil
}
