func (c *SetConstraintsCommand) Init(args []string) (err error) {
if c.ServiceName != "" && !names.IsService(c.ServiceName) {
return fmt.Errorf("invalid service name %q", c.ServiceName)
}
c.Constraints, err = constraints.Parse(args...)
return err
}
func (c *GetConstraintsCommand) Init(args []string) error {
if len(args) > 0 {
if !names.IsService(args[0]) {
return fmt.Errorf("invalid service name %q", args[0])
}
c.ServiceName, args = args[0], args[1:]
}
return cmd.CheckEmpty(args)
}
func (c *RemoveServiceCommand) Init(args []string) error {
if len(args) == 0 {
return fmt.Errorf("no service specified")
}
if !names.IsService(args[0]) {
return fmt.Errorf("invalid service name %q", args[0])
}
c.ServiceName, args = args[0], args[1:]
return cmd.CheckEmpty(args)
}
// Service returns a service state by name.
func (st *State) Service(name string) (service *Service, err error) {
if !names.IsService(name) {
return nil, fmt.Errorf("%q is not a valid service name", name)
}
sdoc := &serviceDoc{}
sel := bson.D{{"_id", name}}
err = st.services.Find(sel).One(sdoc)
if err == mgo.ErrNotFound {
return nil, errors.NotFoundf("service %q", name)
}
if err != nil {
return nil, fmt.Errorf("cannot get service %q: %v", name, err)
}
return newService(st, sdoc), nil
}
func (c *DeployCommand) Init(args []string) error {
switch len(args) {
case 2:
if !names.IsService(args[1]) {
return fmt.Errorf("invalid service name %q", args[1])
}
c.ServiceName = args[1]
fallthrough
case 1:
if _, err := charm.InferURL(args[0], "fake"); err != nil {
return fmt.Errorf("invalid charm name %q", args[0])
}
c.CharmName = args[0]
case 0:
return errors.New("no charm specified")
default:
return cmd.CheckEmpty(args[2:])
}
return c.UnitCommandBase.Init(args)
}
// AddService creates a new service, running the supplied charm, with the
// supplied name (which must be unique). If the charm defines peer relations,
// they will be created automatically.
func (st *State) AddService(name, ownerTag string, ch *Charm, includeNetworks, excludeNetworks []string) (service *Service, err error) {
defer errors.Maskf(&err, "cannot add service %q", name)
kind, ownerId, err := names.ParseTag(ownerTag, names.UserTagKind)
if err != nil || kind != names.UserTagKind {
return nil, fmt.Errorf("Invalid ownertag %s", ownerTag)
}
// Sanity checks.
if !names.IsService(name) {
return nil, fmt.Errorf("invalid name")
}
if ch == nil {
return nil, fmt.Errorf("charm is nil")
}
if exists, err := isNotDead(st.services, name); err != nil {
return nil, err
} else if exists {
return nil, fmt.Errorf("service already exists")
}
env, err := st.Environment()
if err != nil {
return nil, err
} else if env.Life() != Alive {
return nil, fmt.Errorf("environment is no longer alive")
}
if userExists, err := st.checkUserExists(ownerId); err != nil {
return nil, err
} else if !userExists {
return nil, fmt.Errorf("user %v doesn't exist", ownerId)
}
// Create the service addition operations.
peers := ch.Meta().Peers
svcDoc := &serviceDoc{
Name: name,
Series: ch.URL().Series,
Subordinate: ch.Meta().Subordinate,
CharmURL: ch.URL(),
RelationCount: len(peers),
Life: Alive,
OwnerTag: ownerTag,
}
svc := newService(st, svcDoc)
ops := []txn.Op{
env.assertAliveOp(),
createConstraintsOp(st, svc.globalKey(), constraints.Value{}),
// TODO(dimitern) 2014-04-04 bug #1302498
// Once we can add networks independently of machine
// provisioning, we should check the given networks are valid
// and known before setting them.
createRequestedNetworksOp(st, svc.globalKey(), includeNetworks, excludeNetworks),
createSettingsOp(st, svc.settingsKey(), nil),
{
C: st.users.Name,
Id: ownerId,
Assert: txn.DocExists,
},
{
C: st.settingsrefs.Name,
Id: svc.settingsKey(),
Assert: txn.DocMissing,
Insert: settingsRefsDoc{1},
},
{
C: st.services.Name,
Id: name,
Assert: txn.DocMissing,
Insert: svcDoc,
}}
// Collect peer relation addition operations.
peerOps, err := st.addPeerRelationsOps(name, peers)
if err != nil {
return nil, err
}
ops = append(ops, peerOps...)
if err := st.runTransaction(ops); err == txn.ErrAborted {
err := env.Refresh()
if (err == nil && env.Life() != Alive) || errors.IsNotFound(err) {
return nil, fmt.Errorf("environment is no longer alive")
} else if err != nil {
return nil, err
}
if userExists, ueErr := st.checkUserExists(ownerId); ueErr != nil {
return nil, ueErr
} else if !userExists {
return nil, fmt.Errorf("unknown user %q", ownerId)
}
return nil, fmt.Errorf("service already exists")
} else if err != nil {
return nil, err
}
// Refresh to pick the txn-revno.
if err = svc.Refresh(); err != nil {
return nil, err
}
return svc, nil
}