Golang state.Service类代码示例

func NewProReqRelation(c *C, s *ConnSuite, scope charm.RelationScope) *ProReqRelation {
	psvc, err := s.State.AddService("mysql", s.AddTestingCharm(c, "mysql"))
	c.Assert(err, IsNil)
	var rsvc *state.Service
	if scope == charm.ScopeGlobal {
		rsvc, err = s.State.AddService("wordpress", s.AddTestingCharm(c, "wordpress"))
	} else {
		rsvc, err = s.State.AddService("logging", s.AddTestingCharm(c, "logging"))
	}
	c.Assert(err, IsNil)
	eps, err := s.State.InferEndpoints([]string{"mysql", rsvc.Name()})
	c.Assert(err, IsNil)
	rel, err := s.State.AddRelation(eps...)
	c.Assert(err, IsNil)
	prr := &ProReqRelation{rel: rel, psvc: psvc, rsvc: rsvc}
	prr.pu0, prr.pru0 = addRU(c, psvc, rel, nil)
	prr.pu1, prr.pru1 = addRU(c, psvc, rel, nil)
	if scope == charm.ScopeGlobal {
		prr.ru0, prr.rru0 = addRU(c, rsvc, rel, nil)
		prr.ru1, prr.rru1 = addRU(c, rsvc, rel, nil)
	} else {
		prr.ru0, prr.rru0 = addRU(c, rsvc, rel, prr.pu0)
		prr.ru1, prr.rru1 = addRU(c, rsvc, rel, prr.pu1)
	}
	return prr
}

// assertForceMachine ensures that the result of assigning a unit with --to
// is as expected.
func (s *AddUnitSuite) assertForceMachine(c *C, svc *state.Service, expectedNumMachines, unitNum int, machineId string) {
	units, err := svc.AllUnits()
	c.Assert(err, IsNil)
	c.Assert(units, HasLen, expectedNumMachines)
	mid, err := units[unitNum].AssignedMachineId()
	c.Assert(err, IsNil)
	c.Assert(mid, Equals, machineId)
}

func (s *HookContextSuite) AddUnit(c *C, svc *state.Service) *state.Unit {
	unit, err := svc.AddUnit()
	c.Assert(err, IsNil)
	name := strings.Replace(unit.Name(), "/", "-", 1)
	err = unit.SetPrivateAddress(name + ".testing.invalid")
	c.Assert(err, IsNil)
	return unit
}

func removeAllUnits(c *C, s *state.Service) {
	us, err := s.AllUnits()
	c.Assert(err, IsNil)
	for _, u := range us {
		err = u.EnsureDead()
		c.Assert(err, IsNil)
		err = u.Remove()
		c.Assert(err, IsNil)
	}
}

// startService creates a new data value for tracking details of the
// service and starts watching the service for exposure changes.
func (fw *Firewaller) startService(service *state.Service) error {
	serviced := &serviceData{
		fw:      fw,
		service: service,
		exposed: service.IsExposed(),
		unitds:  make(map[string]*unitData),
	}
	fw.serviceds[service.Name()] = serviced
	go serviced.watchLoop(serviced.exposed)
	return nil
}

// serviceSetSettingsStrings updates the settings for the given service,
// taking the configuration from a map of strings.
func serviceSetSettingsStrings(service *state.Service, settings map[string]string) error {
	ch, _, err := service.Charm()
	if err != nil {
		return err
	}
	changes, err := ch.Config().ParseSettingsStrings(settings)
	if err != nil {
		return err
	}
	return service.UpdateConfigSettings(changes)
}

func (*statusContext) processRelations(service *state.Service) (related map[string][]string, subord []string, err error) {
	// TODO(mue) This way the same relation is read twice (for each service).
	// Maybe add Relations() to state, read them only once and pass them to each
	// call of this function.
	relations, err := service.Relations()
	if err != nil {
		return nil, nil, err
	}
	var subordSet set.Strings
	related = make(map[string][]string)
	for _, relation := range relations {
		ep, err := relation.Endpoint(service.Name())
		if err != nil {
			return nil, nil, err
		}
		relationName := ep.Relation.Name
		eps, err := relation.RelatedEndpoints(service.Name())
		if err != nil {
			return nil, nil, err
		}
		for _, ep := range eps {
			if ep.Scope == charm.ScopeContainer && !service.IsPrincipal() {
				subordSet.Add(ep.ServiceName)
			}
			related[relationName] = append(related[relationName], ep.ServiceName)
		}
	}
	for relationName, serviceNames := range related {
		sn := set.NewStrings(serviceNames...)
		related[relationName] = sn.SortedValues()
	}
	return related, subordSet.SortedValues(), nil
}

func (s *ServiceSuite) assertServiceRelations(c *C, svc *state.Service, expectedKeys ...string) []*state.Relation {
	rels, err := svc.Relations()
	c.Assert(err, IsNil)
	if len(rels) == 0 {
		return nil
	}
	relKeys := make([]string, len(expectedKeys))
	for i, rel := range rels {
		relKeys[i] = rel.String()
	}
	sort.Strings(relKeys)
	c.Assert(relKeys, DeepEquals, expectedKeys)
	return rels
}

func (s *SSHCommonSuite) addUnit(srv *state.Service, m *state.Machine, c *C) {
	u, err := srv.AddUnit()
	c.Assert(err, IsNil)
	err = u.AssignToMachine(m)
	c.Assert(err, IsNil)
	// fudge unit.SetPublicAddress
	id, err := m.InstanceId()
	c.Assert(err, IsNil)
	insts, err := s.Conn.Environ.Instances([]state.InstanceId{id})
	c.Assert(err, IsNil)
	addr, err := insts[0].WaitDNSName()
	c.Assert(err, IsNil)
	err = u.SetPublicAddress(addr)
	c.Assert(err, IsNil)
}

// AddUnits starts n units of the given service and allocates machines
// to them as necessary.
func (conn *Conn) AddUnits(svc *state.Service, n int) ([]*state.Unit, error) {
	units := make([]*state.Unit, n)
	// TODO what do we do if we fail half-way through this process?
	for i := 0; i < n; i++ {
		policy := conn.Environ.AssignmentPolicy()
		unit, err := svc.AddUnit()
		if err != nil {
			return nil, fmt.Errorf("cannot add unit %d/%d to service %q: %v", i+1, n, svc.Name(), err)
		}
		if err := conn.State.AssignUnit(unit, policy); err != nil {
			return nil, err
		}
		units[i] = unit
	}
	return units, nil
}

func (s *DeployLocalSuite) assertMachines(c *C, service *state.Service, expectCons constraints.Value, expectIds ...string) {
	units, err := service.AllUnits()
	c.Assert(err, IsNil)
	c.Assert(units, HasLen, len(expectIds))
	unseenIds := set.NewStrings(expectIds...)
	for _, unit := range units {
		id, err := unit.AssignedMachineId()
		c.Assert(err, IsNil)
		unseenIds.Remove(id)
		machine, err := s.State.Machine(id)
		c.Assert(err, IsNil)
		cons, err := machine.Constraints()
		c.Assert(err, IsNil)
		c.Assert(cons, DeepEquals, expectCons)
	}
	c.Assert(unseenIds, DeepEquals, set.NewStrings())
}

func assertOneRelation(c *C, srv *state.Service, relId int, endpoints ...state.Endpoint) {
	rels, err := srv.Relations()
	c.Assert(err, IsNil)
	c.Assert(rels, HasLen, 1)
	rel := rels[0]
	c.Assert(rel.Id(), Equals, relId)
	name := srv.Name()
	expectEp := endpoints[0]
	ep, err := rel.Endpoint(name)
	c.Assert(err, IsNil)
	c.Assert(ep, DeepEquals, expectEp)
	if len(endpoints) == 2 {
		expectEp = endpoints[1]
	}
	eps, err := rel.RelatedEndpoints(name)
	c.Assert(err, IsNil)
	c.Assert(eps, DeepEquals, []state.Endpoint{expectEp})
}

// serviceSetCharm sets the charm for the given service.
func serviceSetCharm(state *state.State, service *state.Service, url string, force bool) error {
	curl, err := charm.ParseURL(url)
	if err != nil {
		return err
	}
	if curl.Schema != "cs" {
		return fmt.Errorf(`charm url has unsupported schema %q`, curl.Schema)
	}
	if curl.Revision < 0 {
		return fmt.Errorf("charm url must include revision")
	}
	conn, err := juju.NewConnFromState(state)
	if err != nil {
		return err
	}
	ch, err := conn.PutCharm(curl, CharmStore, false)
	if err != nil {
		return err
	}
	return service.SetCharm(ch, force)
}

func (context *statusContext) processService(service *state.Service) (status serviceStatus) {
	url, _ := service.CharmURL()
	status.Charm = url.String()
	status.Exposed = service.IsExposed()
	status.Life = processLife(service)
	var err error
	status.Relations, status.SubordinateTo, err = context.processRelations(service)
	if err != nil {
		status.Err = err
		return
	}
	if service.IsPrincipal() {
		status.Units = context.processUnits(context.units[service.Name()])
	}
	return status
}

// serviceSetSettingsYAML updates the settings for the given service,
// taking the configuration from a YAML string.
func serviceSetSettingsYAML(service *state.Service, settings string) error {
	ch, _, err := service.Charm()
	if err != nil {
		return err
	}
	changes, err := ch.Config().ParseSettingsYAML([]byte(settings), service.Name())
	if err != nil {
		return err
	}
	return service.UpdateConfigSettings(changes)
}