Golang ActualLRP.Since方法代碼示例

func (db *SQLDB) ClaimActualLRP(logger lager.Logger, processGuid string, index int32, instanceKey *models.ActualLRPInstanceKey) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
	logger = logger.WithData(lager.Data{"process_guid": processGuid, "index": index, "instance_key": instanceKey})
	logger.Info("starting")
	defer logger.Info("complete")

	var beforeActualLRP models.ActualLRP
	var actualLRP *models.ActualLRP
	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		actualLRP, err = db.fetchActualLRPForUpdate(logger, processGuid, index, false, tx)
		if err != nil {
			logger.Error("failed-fetching-actual-lrp-for-share", err)
			return err
		}
		beforeActualLRP = *actualLRP

		if !actualLRP.AllowsTransitionTo(&actualLRP.ActualLRPKey, instanceKey, models.ActualLRPStateClaimed) {
			logger.Error("cannot-transition-to-claimed", nil, lager.Data{"from_state": actualLRP.State, "same_instance_key": actualLRP.ActualLRPInstanceKey.Equal(instanceKey)})
			return models.ErrActualLRPCannotBeClaimed
		}

		if actualLRP.State == models.ActualLRPStateClaimed && actualLRP.ActualLRPInstanceKey.Equal(instanceKey) {
			return nil
		}

		actualLRP.ModificationTag.Increment()
		actualLRP.State = models.ActualLRPStateClaimed
		actualLRP.ActualLRPInstanceKey = *instanceKey
		actualLRP.PlacementError = ""
		actualLRP.ActualLRPNetInfo = models.ActualLRPNetInfo{}
		actualLRP.Since = db.clock.Now().UnixNano()

		_, err = db.update(logger, tx, actualLRPsTable,
			SQLAttributes{
				"state":                  actualLRP.State,
				"cell_id":                actualLRP.CellId,
				"instance_guid":          actualLRP.InstanceGuid,
				"modification_tag_index": actualLRP.ModificationTag.Index,
				"placement_error":        actualLRP.PlacementError,
				"since":                  actualLRP.Since,
				"net_info":               []byte{},
			},
			"process_guid = ? AND instance_index = ? AND evacuating = ?",
			processGuid, index, false,
		)
		if err != nil {
			logger.Error("failed-claiming-actual-lrp", err)
			return db.convertSQLError(err)
		}

		return nil
	})

	return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}

func (db *SQLDB) UnclaimActualLRP(logger lager.Logger, key *models.ActualLRPKey) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
	logger = logger.WithData(lager.Data{"key": key})

	var beforeActualLRP models.ActualLRP
	var actualLRP *models.ActualLRP
	processGuid := key.ProcessGuid
	index := key.Index

	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		actualLRP, err = db.fetchActualLRPForUpdate(logger, processGuid, index, false, tx)
		if err != nil {
			logger.Error("failed-fetching-actual-lrp-for-share", err)
			return err
		}
		beforeActualLRP = *actualLRP

		if actualLRP.State == models.ActualLRPStateUnclaimed {
			logger.Debug("already-unclaimed")
			return models.ErrActualLRPCannotBeUnclaimed
		}
		logger.Info("starting")
		defer logger.Info("complete")

		now := db.clock.Now().UnixNano()
		actualLRP.ModificationTag.Increment()
		actualLRP.State = models.ActualLRPStateUnclaimed
		actualLRP.ActualLRPInstanceKey.CellId = ""
		actualLRP.ActualLRPInstanceKey.InstanceGuid = ""
		actualLRP.Since = now
		actualLRP.ActualLRPNetInfo = models.ActualLRPNetInfo{}

		_, err = db.update(logger, tx, actualLRPsTable,
			SQLAttributes{
				"state":                  actualLRP.State,
				"cell_id":                actualLRP.CellId,
				"instance_guid":          actualLRP.InstanceGuid,
				"modification_tag_index": actualLRP.ModificationTag.Index,
				"since":                  actualLRP.Since,
				"net_info":               []byte{},
			},
			"process_guid = ? AND instance_index = ? AND evacuating = ?",
			processGuid, index, false,
		)
		if err != nil {
			logger.Error("failed-to-unclaim-actual-lrp", err)
			return db.convertSQLError(err)
		}

		return nil
	})

	return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}

func (db *ETCDDB) unclaimActualLRPWithIndex(
	logger lager.Logger,
	lrp *models.ActualLRP,
	storeIndex uint64,
	actualLRPKey *models.ActualLRPKey,
	actualLRPInstanceKey *models.ActualLRPInstanceKey,
) (change stateChange, err error) {
	logger = logger.Session("unclaim-actual-lrp-with-index")
	defer logger.Debug("complete", lager.Data{"state_change": change, "error": err})

	if !lrp.ActualLRPKey.Equal(actualLRPKey) {
		logger.Error("failed-actual-lrp-key-differs", models.ErrActualLRPCannotBeUnclaimed)
		return stateDidNotChange, models.ErrActualLRPCannotBeUnclaimed
	}

	if lrp.State == models.ActualLRPStateUnclaimed {
		logger.Info("already-unclaimed")
		return stateDidNotChange, nil
	}

	if !lrp.ActualLRPInstanceKey.Equal(actualLRPInstanceKey) {
		logger.Error("failed-actual-lrp-instance-key-differs", models.ErrActualLRPCannotBeUnclaimed)
		return stateDidNotChange, models.ErrActualLRPCannotBeUnclaimed
	}

	lrp.Since = db.clock.Now().UnixNano()
	lrp.State = models.ActualLRPStateUnclaimed
	lrp.ActualLRPInstanceKey = models.ActualLRPInstanceKey{}
	lrp.ActualLRPNetInfo = models.EmptyActualLRPNetInfo()
	lrp.ModificationTag.Increment()

	err = lrp.Validate()
	if err != nil {
		logger.Error("failed-to-validate-unclaimed-lrp", err)
		return stateDidNotChange, models.NewError(models.Error_InvalidRecord, err.Error())
	}

	lrpData, serialErr := db.serializeModel(logger, lrp)
	if serialErr != nil {
		logger.Error("failed-to-marshal-unclaimed-lrp", serialErr)
		return stateDidNotChange, serialErr
	}

	_, err = db.client.CompareAndSwap(ActualLRPSchemaPath(actualLRPKey.ProcessGuid, actualLRPKey.Index), lrpData, 0, storeIndex)
	if err != nil {
		logger.Error("failed-to-compare-and-swap", err)
		return stateDidNotChange, models.ErrActualLRPCannotBeUnclaimed
	}

	logger.Debug("changed-to-unclaimed")
	return stateDidChange, nil
}

func (db *SQLDB) FailActualLRP(logger lager.Logger, key *models.ActualLRPKey, placementError string) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
	logger = logger.WithData(lager.Data{"actual_lrp_key": key, "placement_error": placementError})
	logger.Info("starting")
	defer logger.Info("complete")

	var beforeActualLRP models.ActualLRP
	var actualLRP *models.ActualLRP

	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		actualLRP, err = db.fetchActualLRPForUpdate(logger, key.ProcessGuid, key.Index, false, tx)
		if err != nil {
			logger.Error("failed-to-get-actual-lrp", err)
			return err
		}
		beforeActualLRP = *actualLRP

		if actualLRP.State != models.ActualLRPStateUnclaimed {
			logger.Error("cannot-fail-actual-lrp", nil, lager.Data{"from_state": actualLRP.State})
			return models.ErrActualLRPCannotBeFailed
		}

		now := db.clock.Now().UnixNano()
		actualLRP.ModificationTag.Increment()
		actualLRP.PlacementError = placementError
		actualLRP.Since = now
		evacuating := false

		_, err = db.update(logger, tx, actualLRPsTable,
			SQLAttributes{
				"modification_tag_index": actualLRP.ModificationTag.Index,
				"placement_error":        truncateString(actualLRP.PlacementError, 1024),
				"since":                  actualLRP.Since,
			},
			"process_guid = ? AND instance_index = ? AND evacuating = ?",
			key.ProcessGuid, key.Index, evacuating,
		)
		if err != nil {
			logger.Error("failed-failing-actual-lrp", err)
			return db.convertSQLError(err)
		}

		return nil
	})

	return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}

)

var _ = Describe("Evacuation", func() {
	var (
		actualLRP *models.ActualLRP
		guid      string
		index     int32
	)

	BeforeEach(func() {
		guid = "some-guid"
		index = int32(1)
		actualLRP = model_helpers.NewValidActualLRP(guid, index)
		actualLRP.CrashCount = 0
		actualLRP.CrashReason = ""
		actualLRP.Since = fakeClock.Now().UnixNano()
		actualLRP.ModificationTag = models.ModificationTag{}
		actualLRP.ModificationTag.Increment()
		actualLRP.ModificationTag.Increment()

		_, err := sqlDB.CreateUnclaimedActualLRP(logger, &actualLRP.ActualLRPKey)
		Expect(err).NotTo(HaveOccurred())
		_, _, err = sqlDB.ClaimActualLRP(logger, guid, index, &actualLRP.ActualLRPInstanceKey)
		Expect(err).NotTo(HaveOccurred())
		_, _, err = sqlDB.StartActualLRP(logger, &actualLRP.ActualLRPKey, &actualLRP.ActualLRPInstanceKey, &actualLRP.ActualLRPNetInfo)
		Expect(err).NotTo(HaveOccurred())
	})

	Describe("EvacuateActualLRP", func() {
		var ttl uint64

func (db *SQLDB) CrashActualLRP(logger lager.Logger, key *models.ActualLRPKey, instanceKey *models.ActualLRPInstanceKey, crashReason string) (*models.ActualLRPGroup, *models.ActualLRPGroup, bool, error) {
	logger = logger.WithData(lager.Data{"key": key, "instance_key": instanceKey, "crash_reason": crashReason})
	logger.Info("starting")
	defer logger.Info("complete")

	var immediateRestart = false
	var beforeActualLRP models.ActualLRP
	var actualLRP *models.ActualLRP

	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		actualLRP, err = db.fetchActualLRPForUpdate(logger, key.ProcessGuid, key.Index, false, tx)
		if err != nil {
			logger.Error("failed-to-get-actual-lrp", err)
			return err
		}
		beforeActualLRP = *actualLRP

		latestChangeTime := time.Duration(db.clock.Now().UnixNano() - actualLRP.Since)

		var newCrashCount int32
		if latestChangeTime > models.CrashResetTimeout && actualLRP.State == models.ActualLRPStateRunning {
			newCrashCount = 1
		} else {
			newCrashCount = actualLRP.CrashCount + 1
		}

		if !actualLRP.AllowsTransitionTo(&actualLRP.ActualLRPKey, instanceKey, models.ActualLRPStateCrashed) {
			logger.Error("failed-to-transition-to-crashed", nil, lager.Data{"from_state": actualLRP.State, "same_instance_key": actualLRP.ActualLRPInstanceKey.Equal(instanceKey)})
			return models.ErrActualLRPCannotBeCrashed
		}

		actualLRP.ModificationTag.Increment()
		actualLRP.State = models.ActualLRPStateCrashed

		actualLRP.ActualLRPInstanceKey.InstanceGuid = ""
		actualLRP.ActualLRPInstanceKey.CellId = ""
		actualLRP.ActualLRPNetInfo = models.ActualLRPNetInfo{}
		actualLRP.CrashCount = newCrashCount
		actualLRP.CrashReason = crashReason
		evacuating := false

		if actualLRP.ShouldRestartImmediately(models.NewDefaultRestartCalculator()) {
			actualLRP.State = models.ActualLRPStateUnclaimed
			immediateRestart = true
		}

		now := db.clock.Now().UnixNano()
		actualLRP.Since = now

		_, err = db.update(logger, tx, actualLRPsTable,
			SQLAttributes{
				"state":                  actualLRP.State,
				"cell_id":                actualLRP.CellId,
				"instance_guid":          actualLRP.InstanceGuid,
				"modification_tag_index": actualLRP.ModificationTag.Index,
				"crash_count":            actualLRP.CrashCount,
				"crash_reason":           truncateString(actualLRP.CrashReason, 1024),
				"since":                  actualLRP.Since,
				"net_info":               []byte{},
			},
			"process_guid = ? AND instance_index = ? AND evacuating = ?",
			key.ProcessGuid, key.Index, evacuating,
		)
		if err != nil {
			logger.Error("failed-to-crash-actual-lrp", err)
			return db.convertSQLError(err)
		}

		return nil
	})

	return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, immediateRestart, err
}

func (db *SQLDB) StartActualLRP(logger lager.Logger, key *models.ActualLRPKey, instanceKey *models.ActualLRPInstanceKey, netInfo *models.ActualLRPNetInfo) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
	logger = logger.WithData(lager.Data{"actual_lrp_key": key, "actual_lrp_instance_key": instanceKey, "net_info": netInfo})

	var beforeActualLRP models.ActualLRP
	var actualLRP *models.ActualLRP

	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		actualLRP, err = db.fetchActualLRPForUpdate(logger, key.ProcessGuid, key.Index, false, tx)
		if err == models.ErrResourceNotFound {
			actualLRP, err = db.createRunningActualLRP(logger, key, instanceKey, netInfo, tx)
			return err
		}

		if err != nil {
			logger.Error("failed-to-get-actual-lrp", err)
			return err
		}

		beforeActualLRP = *actualLRP

		if actualLRP.ActualLRPKey.Equal(key) &&
			actualLRP.ActualLRPInstanceKey.Equal(instanceKey) &&
			actualLRP.ActualLRPNetInfo.Equal(netInfo) &&
			actualLRP.State == models.ActualLRPStateRunning {
			logger.Debug("nothing-to-change")
			return nil
		}

		if !actualLRP.AllowsTransitionTo(key, instanceKey, models.ActualLRPStateRunning) {
			logger.Error("failed-to-transition-actual-lrp-to-started", nil)
			return models.ErrActualLRPCannotBeStarted
		}

		logger.Info("starting")
		defer logger.Info("completed")

		now := db.clock.Now().UnixNano()
		evacuating := false

		actualLRP.ActualLRPInstanceKey = *instanceKey
		actualLRP.ActualLRPNetInfo = *netInfo
		actualLRP.State = models.ActualLRPStateRunning
		actualLRP.Since = now
		actualLRP.ModificationTag.Increment()
		actualLRP.PlacementError = ""

		netInfoData, err := db.serializeModel(logger, &actualLRP.ActualLRPNetInfo)
		if err != nil {
			logger.Error("failed-to-serialize-net-info", err)
			return err
		}

		_, err = db.update(logger, tx, actualLRPsTable,
			SQLAttributes{
				"state":                  actualLRP.State,
				"cell_id":                actualLRP.CellId,
				"instance_guid":          actualLRP.InstanceGuid,
				"modification_tag_index": actualLRP.ModificationTag.Index,
				"placement_error":        actualLRP.PlacementError,
				"since":                  actualLRP.Since,
				"net_info":               netInfoData,
			},
			"process_guid = ? AND instance_index = ? AND evacuating = ?",
			key.ProcessGuid, key.Index, evacuating,
		)
		if err != nil {
			logger.Error("failed-starting-actual-lrp", err)
			return db.convertSQLError(err)
		}

		return nil
	})

	return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}

				ActualLRPKey: models.NewActualLRPKey(
					"process-guid-1",
					2,
					"domain-1",
				),
				ActualLRPInstanceKey: models.NewActualLRPInstanceKey(
					"instance-guid-1",
					"cell-id-1",
				),
				State: models.ActualLRPStateClaimed,
				Since: 4444,
			}

			evacuatingLRP2 = actualLRP2
			evacuatingLRP2.State = models.ActualLRPStateRunning
			evacuatingLRP2.Since = 3417
		})

		JustBeforeEach(func() {
			request := newTestRequest(requestBody)
			handler.ActualLRPGroups(logger, responseRecorder, request)
		})

		Context("when reading actual lrps from DB succeeds", func() {
			var actualLRPGroups []*models.ActualLRPGroup

			BeforeEach(func() {
				actualLRPGroups =
					[]*models.ActualLRPGroup{
						{Instance: &actualLRP1},
						{Instance: &actualLRP2, Evacuating: &evacuatingLRP2},

func (db *SQLDB) EvacuateActualLRP(
	logger lager.Logger,
	lrpKey *models.ActualLRPKey,
	instanceKey *models.ActualLRPInstanceKey,
	netInfo *models.ActualLRPNetInfo,
	ttl uint64,
) (*models.ActualLRPGroup, error) {
	logger = logger.Session("evacuate-lrp", lager.Data{"lrp_key": lrpKey, "instance_key": instanceKey, "net_info": netInfo})
	logger.Debug("starting")
	defer logger.Debug("complete")

	var actualLRP *models.ActualLRP

	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		processGuid := lrpKey.ProcessGuid
		index := lrpKey.Index

		actualLRP, err = db.fetchActualLRPForUpdate(logger, processGuid, index, true, tx)
		if err == models.ErrResourceNotFound {
			logger.Debug("creating-evacuating-lrp")
			actualLRP, err = db.createEvacuatingActualLRP(logger, lrpKey, instanceKey, netInfo, ttl, tx)
			return err
		}

		if err != nil {
			logger.Error("failed-locking-lrp", err)
			return err
		}

		if actualLRP.ActualLRPKey.Equal(lrpKey) &&
			actualLRP.ActualLRPInstanceKey.Equal(instanceKey) &&
			reflect.DeepEqual(actualLRP.ActualLRPNetInfo, *netInfo) {
			logger.Debug("evacuating-lrp-already-exists")
			return nil
		}

		now := db.clock.Now().UnixNano()
		actualLRP.ModificationTag.Increment()
		actualLRP.ActualLRPKey = *lrpKey
		actualLRP.ActualLRPInstanceKey = *instanceKey
		actualLRP.Since = now
		actualLRP.ActualLRPNetInfo = *netInfo

		netInfoData, err := db.serializeModel(logger, netInfo)
		if err != nil {
			logger.Error("failed-serializing-net-info", err)
			return err
		}

		_, err = db.update(logger, tx, "actual_lrps",
			SQLAttributes{
				"domain":                 actualLRP.Domain,
				"instance_guid":          actualLRP.InstanceGuid,
				"cell_id":                actualLRP.CellId,
				"net_info":               netInfoData,
				"state":                  actualLRP.State,
				"since":                  actualLRP.Since,
				"modification_tag_index": actualLRP.ModificationTag.Index,
			},
			"process_guid = ? AND instance_index = ? AND evacuating = ?",
			actualLRP.ProcessGuid, actualLRP.Index, true,
		)
		if err != nil {
			logger.Error("failed-update-evacuating-lrp", err)
			return db.convertSQLError(err)
		}

		return nil
	})

	return &models.ActualLRPGroup{Evacuating: actualLRP}, err
}

		BeforeEach(func() {
			guid = "the-guid"
			index = 1
			ttl = 60
			actualLRP = model_helpers.NewValidActualLRP(guid, index)

			etcdHelper.SetRawEvacuatingActualLRP(actualLRP, ttl)

			node, err := storeClient.Get(etcd.EvacuatingActualLRPSchemaPath(guid, index), false, false)
			fakeStoreClient.GetReturns(node, err)
		})

		Context("when the something about the actual LRP has changed", func() {
			BeforeEach(func() {
				clock.IncrementBySeconds(5)
				actualLRP.Since = clock.Now().UnixNano()
			})

			Context("when the lrp key changes", func() {
				BeforeEach(func() {
					actualLRP.Domain = "some-other-domain"
				})

				It("persists the evacuating lrp in etcd", func() {
					group, err := etcdDB.EvacuateActualLRP(logger, &actualLRP.ActualLRPKey, &actualLRP.ActualLRPInstanceKey, &actualLRP.ActualLRPNetInfo, ttl)
					Expect(err).NotTo(HaveOccurred())

					actualLRP.ModificationTag.Increment()
					actualLRPGroup, err := etcdDB.ActualLRPGroupByProcessGuidAndIndex(logger, guid, index)
					Expect(err).NotTo(HaveOccurred())
					Expect(actualLRPGroup.Evacuating).To(BeEquivalentTo(actualLRP))