communications

package
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 Go to latest Published: Sep 10, 2020 License: Apache-2.0 Imports: 26 Imported by: 7

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Index

Constants

This section is empty.

Variables

View Source 
var Store storage.Storage

Store is a reference to the Storage being used

Functions

func ActivateObjects 

func ActivateObjects()

ActivateObjects looks for objects that are ready to be activated, marks them as active, and sends object notifications to their destinations

func PrepareDeleteNotifications 

func PrepareDeleteNotifications(metaData common.MetaData) ([]common.NotificationInfo, common.SyncServiceError)

PrepareDeleteNotifications prepares the delete notification message This function should not acquire an object lock (common.ObjectLocks) as the caller has already acquired one.

func PrepareNotificationsForDestinations 

func PrepareNotificationsForDestinations(metaData common.MetaData, destinations []common.StoreDestinationStatus, topic string) ([]common.NotificationInfo,
	common.SyncServiceError)

PrepareNotificationsForDestinations prepares notification messages for the destinations if necessary This function should not acquire an object lock (common.ObjectLocks) as the caller has already acquired one.

func PrepareObjectNotifications 

func PrepareObjectNotifications(metaData common.MetaData) ([]common.NotificationInfo, common.SyncServiceError)

PrepareObjectNotifications sends notifications to object’s destinations This function should not acquire an object lock (common.ObjectLocks) as the caller has already acquired one.

func PrepareObjectStatusNotification 

func PrepareObjectStatusNotification(metaData common.MetaData, status string) ([]common.NotificationInfo, common.SyncServiceError)

PrepareObjectStatusNotification sends an object status message to the other side This function should not acquire an object lock (common.ObjectLocks) as the caller has already acquired one.

func PrepareUpdateNotification 

func PrepareUpdateNotification(metaData common.MetaData, destinations []common.Destination) ([]common.NotificationInfo, common.SyncServiceError)

PrepareUpdateNotification prepares the notification message from object's meta data This function should not acquire an object lock (common.ObjectLocks) as the caller has already acquired one.

func ResendNotifications 

func ResendNotifications() common.SyncServiceError

ResendNotifications resends notications that haven't been acknowledged

func ResendObjects 

func ResendObjects() common.SyncServiceError

ResendObjects requests to resend all the relevant objects

func SendErrorResponse 

func SendErrorResponse(writer http.ResponseWriter, err error, message string, statusCode int)

SendErrorResponse common code to send HTTP error codes

func SendNotifications 

func SendNotifications(notifications []common.NotificationInfo) common.SyncServiceError

SendNotifications calls the communication to send the notification messages

Types

type Communicator 

type Communicator interface {
	// StartCommunication starts communications
	StartCommunication() common.SyncServiceError

	// StopCommunication stops communications
	StopCommunication() common.SyncServiceError

	// SendNotificationMessage sends a notification message from the CSS to the ESS or from the ESS to the CSS
	SendNotificationMessage(notificationTopic string, destType string, destID string, instanceID int64, dataID int64, metaData *common.MetaData) common.SyncServiceError

	// SendFeedbackMessage sends a feedback message from the ESS to the CSS or from the CSS to the ESS
	SendFeedbackMessage(code int, retryInterval int32, reason string, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

	// SendErrorMessage sends an error message from the ESS to the CSS or from the CSS to the ESS
	SendErrorMessage(err common.SyncServiceError, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

	// Register sends a registration message to be sent by an ESS
	Register() common.SyncServiceError

	// RegisterAck sends a registration acknowledgement message from the CSS
	RegisterAck(destination common.Destination) common.SyncServiceError

	// HandleRegAck handles a registration acknowledgement message from the CSS
	HandleRegAck()

	// RegisterAsNew send a notification from a CSS to a ESS that the ESS has to send a registerNew message in order
	// to register
	RegisterAsNew(destination common.Destination) common.SyncServiceError

	// RegisterNew sends a new registration message to be sent by an ESS
	RegisterNew() common.SyncServiceError

	// Unregister ESS
	Unregister() common.SyncServiceError

	// SendPing sends a ping message from ESS to CSS
	SendPing() common.SyncServiceError

	// GetData requests data to be sent from the CSS to the ESS or from the ESS to the CSS
	GetData(metaData common.MetaData, offset int64) common.SyncServiceError

	// SendData sends data from the CSS to the ESS or from the ESS to the CSS
	SendData(orgID string, destType string, destID string, message []byte, chunked bool) common.SyncServiceError

	// ResendObjects requests to resend all the relevant objects
	ResendObjects() common.SyncServiceError

	// SendAckResendObjects sends ack to resend objects request
	SendAckResendObjects(destination common.Destination) common.SyncServiceError

	// UpdateOrganization adds or updates an organization
	UpdateOrganization(org common.Organization, timestamp time.Time) common.SyncServiceError

	// DeleteOrganization removes an organization
	DeleteOrganization(orgID string) common.SyncServiceError

	// LockDataChunks locks one of the data chunks locks
	LockDataChunks(index uint32, metadata *common.MetaData)

	// UnlockDataChunks unlocks one of the data chunks locks
	UnlockDataChunks(index uint32, metadata *common.MetaData)
}

Communicator defines the interface for communications between the CSS and the CSS 

var Comm Communicator

Comm is the selected communications struct

type Error 

type Error struct {
	// contains filtered or unexported fields
}

Error is the error struct used by the communications code

func (*Error) Error 

func (e *Error) Error() string

type HTTP 

type HTTP struct {
	// contains filtered or unexported fields
}

HTTP is the struct for the HTTP communications layer

func (*HTTP) ChangeLeadership 

func (communication *HTTP) ChangeLeadership(isLeader bool) common.SyncServiceError

ChangeLeadership changes the leader

func (*HTTP) DeleteOrganization 

func (communication *HTTP) DeleteOrganization(orgID string) common.SyncServiceError

DeleteOrganization removes an organization

func (*HTTP) GetData 

func (communication *HTTP) GetData(metaData common.MetaData, offset int64) common.SyncServiceError

GetData requests data to be sent from the CSS to the ESS

func (*HTTP) HandleRegAck 

func (communication *HTTP) HandleRegAck()

HandleRegAck handles a registration acknowledgement message from the CSS

func (*HTTP) LockDataChunks 

func (communication *HTTP) LockDataChunks(index uint32, metadata *common.MetaData)

LockDataChunks locks one of the data chunks locks

func (*HTTP) Poll 

func (communication *HTTP) Poll() bool

Poll polls the CSS for updates, notifications, etc

func (*HTTP) Register 

func (communication *HTTP) Register() common.SyncServiceError

Register sends a registration message to be sent by an ESS

func (*HTTP) RegisterAck 

func (communication *HTTP) RegisterAck(destination common.Destination) common.SyncServiceError

RegisterAck sends a registration acknowledgement message from the CSS

func (*HTTP) RegisterAsNew 

func (communication *HTTP) RegisterAsNew(destination common.Destination) common.SyncServiceError

RegisterAsNew send a notification from a CSS to a ESS that the ESS has to send a registerNew message in order to register

func (*HTTP) RegisterNew 

func (communication *HTTP) RegisterNew() common.SyncServiceError

RegisterNew sends a new registration message to be sent by an ESS

func (*HTTP) ResendObjects 

func (communication *HTTP) ResendObjects() common.SyncServiceError

ResendObjects requests to resend all the relevant objects

func (*HTTP) SendAckResendObjects 

func (communication *HTTP) SendAckResendObjects(destination common.Destination) common.SyncServiceError

SendAckResendObjects sends ack to resend objects request

func (*HTTP) SendData 

func (communication *HTTP) SendData(orgID string, destType string, destID string, message []byte, chunked bool) common.SyncServiceError

SendData sends data from the CSS to the ESS or from the ESS to the CSS

func (*HTTP) SendErrorMessage 

func (communication *HTTP) SendErrorMessage(err common.SyncServiceError, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendErrorMessage sends an error message from the ESS to the CSS or from the CSS to the ESS

func (*HTTP) SendFeedbackMessage 

func (communication *HTTP) SendFeedbackMessage(code int, retryInterval int32, reason string, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendFeedbackMessage sends a feedback message from the ESS to the CSS or from the CSS to the ESS

func (*HTTP) SendNotificationMessage 

func (communication *HTTP) SendNotificationMessage(notificationTopic string, destType string, destID string, instanceID int64, dataID int64,
	metaData *common.MetaData) common.SyncServiceError

SendNotificationMessage sends a notification message from the CSS to the ESS or from the ESS to the CSS

func (*HTTP) SendPing 

func (communication *HTTP) SendPing() common.SyncServiceError

SendPing sends a ping message from ESS to CSS

func (*HTTP) StartCommunication 

func (communication *HTTP) StartCommunication() common.SyncServiceError

StartCommunication starts communications

func (*HTTP) StopCommunication 

func (communication *HTTP) StopCommunication() common.SyncServiceError

StopCommunication stops communications

func (*HTTP) UnlockDataChunks 

func (communication *HTTP) UnlockDataChunks(index uint32, metadata *common.MetaData)

UnlockDataChunks unlocks one of the data chunks locks

func (*HTTP) Unregister 

func (communication *HTTP) Unregister() common.SyncServiceError

Unregister ESS

func (*HTTP) Unsubscribe 

func (communication *HTTP) Unsubscribe() common.SyncServiceError

Unsubscribe unsubcribes the node from its MQTT subscriptions TODO: Maybe we should do something for HTTP too

func (*HTTP) UpdateOrganization 

func (communication *HTTP) UpdateOrganization(org common.Organization, timestamp time.Time) common.SyncServiceError

UpdateOrganization adds or updates an organization

type MQTT 

type MQTT struct {
	// contains filtered or unexported fields
}

MQTT is the struct for MQTT based communications between a CSS and an ESS

func (*MQTT) DeleteOrganization 

func (communication *MQTT) DeleteOrganization(orgID string) common.SyncServiceError

DeleteOrganization removes an organization

func (*MQTT) GetData 

func (communication *MQTT) GetData(metaData common.MetaData, offset int64) common.SyncServiceError

GetData requests data to be sent from the CSS to the ESS or from the ESS to the CSS

func (*MQTT) HandleRegAck 

func (communication *MQTT) HandleRegAck()

HandleRegAck handles a registration acknowledgement message from the CSS

func (*MQTT) LockDataChunks 

func (communication *MQTT) LockDataChunks(index uint32, metadata *common.MetaData)

LockDataChunks locks one of the data chunks locks

func (*MQTT) Register 

func (communication *MQTT) Register() common.SyncServiceError

Register sends a registration message to be sent by an ESS or from the CSS to the ESS

func (*MQTT) RegisterAck 

func (communication *MQTT) RegisterAck(destination common.Destination) common.SyncServiceError

RegisterAck sends a registration acknowledgement message from the CSS

func (*MQTT) RegisterAsNew 

func (communication *MQTT) RegisterAsNew(destination common.Destination) common.SyncServiceError

RegisterAsNew send a notification from a CSS to a ESS that the ESS has to send a registerNew message in order to register

func (*MQTT) RegisterNew 

func (communication *MQTT) RegisterNew() common.SyncServiceError

RegisterNew sends a new registration message to be sent by an ESS

func (*MQTT) ResendObjects 

func (communication *MQTT) ResendObjects() common.SyncServiceError

ResendObjects requests to resend all the relevant objects

func (*MQTT) SendAckResendObjects 

func (communication *MQTT) SendAckResendObjects(destination common.Destination) common.SyncServiceError

SendAckResendObjects sends ack to resend objects request

func (*MQTT) SendData 

func (communication *MQTT) SendData(orgID string, destType string, destID string, message []byte, chunked bool) common.SyncServiceError

SendData sends data from the CSS to the ESS or from the ESS to the CSS

func (*MQTT) SendErrorMessage 

func (communication *MQTT) SendErrorMessage(err common.SyncServiceError, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendErrorMessage sends an error message from the ESS to the CSS or from the CSS to the ESS

func (*MQTT) SendFeedbackMessage 

func (communication *MQTT) SendFeedbackMessage(code int, retryInterval int32, reason string, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendFeedbackMessage sends a feedback message from the ESS to the CSS or from the CSS to the ESS

func (*MQTT) SendNotificationMessage 

func (communication *MQTT) SendNotificationMessage(notificationTopic string, destType string, destID string, instanceID int64, dataID int64,
	metaData *common.MetaData) common.SyncServiceError

SendNotificationMessage sends a notification message from the CSS to the ESS or from the ESS to the CSS

func (*MQTT) SendPing 

func (communication *MQTT) SendPing() common.SyncServiceError

SendPing sends a ping message from ESS to CSS

func (*MQTT) StartCommunication 

func (communication *MQTT) StartCommunication() common.SyncServiceError

StartCommunication starts communications

func (*MQTT) StopCommunication 

func (communication *MQTT) StopCommunication() common.SyncServiceError

StopCommunication stops communications

func (*MQTT) UnlockDataChunks 

func (communication *MQTT) UnlockDataChunks(index uint32, metadata *common.MetaData)

UnlockDataChunks unlocks one of the data chunks locks

func (*MQTT) Unregister 

func (communication *MQTT) Unregister() common.SyncServiceError

Unregister ESS

func (*MQTT) UpdateOrganization 

func (communication *MQTT) UpdateOrganization(org common.Organization, timestamp time.Time) common.SyncServiceError

UpdateOrganization adds or updates an organization

type TestComm 

type TestComm struct {
}

TestComm is a communicator used for unit testing

func (*TestComm) DeleteOrganization 

func (communication *TestComm) DeleteOrganization(orgID string) common.SyncServiceError

DeleteOrganization removes an organization

func (*TestComm) GetData 

func (communication *TestComm) GetData(metaData common.MetaData, offset int64) common.SyncServiceError

GetData requests data to be sent from the CSS to the ESS or from the ESS to the CSS

func (*TestComm) HandleRegAck 

func (communication *TestComm) HandleRegAck()

HandleRegAck handles a registration acknowledgement message from the CSS

func (*TestComm) LockDataChunks 

func (communication *TestComm) LockDataChunks(index uint32, metadata *common.MetaData)

LockDataChunks locks one of the data chunks locks

func (*TestComm) Register 

func (communication *TestComm) Register() common.SyncServiceError

Register sends a registration message to be sent by an ESS

func (*TestComm) RegisterAck 

func (communication *TestComm) RegisterAck(destination common.Destination) common.SyncServiceError

RegisterAck sends a registration acknowledgement message from the CSS

func (*TestComm) RegisterAsNew 

func (communication *TestComm) RegisterAsNew(destination common.Destination) common.SyncServiceError

RegisterAsNew send a notification from a CSS to a ESS that the ESS has to send a registerNew message in order to register

func (*TestComm) RegisterNew 

func (communication *TestComm) RegisterNew() common.SyncServiceError

RegisterNew sends a new registration message to be sent by an ESS

func (*TestComm) ResendObjects 

func (communication *TestComm) ResendObjects() common.SyncServiceError

ResendObjects requests to resend all the relevant objects

func (*TestComm) SendAckResendObjects 

func (communication *TestComm) SendAckResendObjects(destination common.Destination) common.SyncServiceError

SendAckResendObjects sends ack to resend objects request

func (*TestComm) SendData 

func (communication *TestComm) SendData(orgID string, destType string, destID string, message []byte, chunked bool) common.SyncServiceError

SendData sends data from the CSS to the ESS or from the ESS to the CSS

func (*TestComm) SendErrorMessage 

func (communication *TestComm) SendErrorMessage(err common.SyncServiceError, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendErrorMessage sends an error message from the ESS to the CSS or from the CSS to the ESS

func (*TestComm) SendFeedbackMessage 

func (communication *TestComm) SendFeedbackMessage(code int, retryInterval int32, reason string, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendFeedbackMessage sends a feedback message from the ESS to the CSS or from the CSS to the ESS

func (*TestComm) SendNotificationMessage 

func (communication *TestComm) SendNotificationMessage(notificationTopic string, destType string,
	destID string, instanceID int64, dataID int64, metaData *common.MetaData) common.SyncServiceError

SendNotificationMessage sends a notification message from the CSS to the ESS or from the ESS to the CSS

func (*TestComm) SendPing 

func (communication *TestComm) SendPing() common.SyncServiceError

SendPing sends a ping message from ESS to CSS

func (*TestComm) StartCommunication 

func (communication *TestComm) StartCommunication() common.SyncServiceError

StartCommunication starts communications

func (*TestComm) StopCommunication 

func (communication *TestComm) StopCommunication() common.SyncServiceError

StopCommunication stops communications

func (*TestComm) UnlockDataChunks 

func (communication *TestComm) UnlockDataChunks(index uint32, metadata *common.MetaData)

UnlockDataChunks unlocks one of the data chunks locks

func (*TestComm) Unregister 

func (communication *TestComm) Unregister() common.SyncServiceError

Unregister ESS

func (*TestComm) UpdateOrganization 

func (communication *TestComm) UpdateOrganization(org common.Organization, timestamp time.Time) common.SyncServiceError

UpdateOrganization adds or updates an organization

type Wrapper 

type Wrapper struct {
	// contains filtered or unexported fields
}

Wrapper is the struct for a wrapper around the MQTT and HTTP communications between the CSS and ESS

func NewWrapper 

func NewWrapper(httpComm *HTTP, mqttComm *MQTT) *Wrapper

NewWrapper creates a new Wrapper struct

func (*Wrapper) DeleteOrganization 

func (communication *Wrapper) DeleteOrganization(orgID string) common.SyncServiceError

DeleteOrganization removes an organization

func (*Wrapper) GetData 

func (communication *Wrapper) GetData(metaData common.MetaData, offset int64) common.SyncServiceError

GetData requests data to be sent from the CSS to the ESS or from the ESS to the CSS

func (*Wrapper) HandleRegAck 

func (communication *Wrapper) HandleRegAck()

HandleRegAck handles a registration acknowledgement message from the CSS

func (*Wrapper) LockDataChunks 

func (communication *Wrapper) LockDataChunks(index uint32, metadata *common.MetaData)

LockDataChunks locks one of the data chunks locks

func (*Wrapper) Register 

func (communication *Wrapper) Register() common.SyncServiceError

Register sends a registration message to be sent by an ESS

func (*Wrapper) RegisterAck 

func (communication *Wrapper) RegisterAck(destination common.Destination) common.SyncServiceError

RegisterAck sends a registration acknowledgement message from the CSS

func (*Wrapper) RegisterAsNew 

func (communication *Wrapper) RegisterAsNew(destination common.Destination) common.SyncServiceError

RegisterAsNew send a notification from a CSS to a ESS that the ESS has to send a registerNew message in order to register

func (*Wrapper) RegisterNew 

func (communication *Wrapper) RegisterNew() common.SyncServiceError

RegisterNew sends a new registration message to be sent by an ESS

func (*Wrapper) ResendObjects 

func (communication *Wrapper) ResendObjects() common.SyncServiceError

ResendObjects requests to resend all the relevant objects

func (*Wrapper) SendAckResendObjects 

func (communication *Wrapper) SendAckResendObjects(destination common.Destination) common.SyncServiceError

SendAckResendObjects sends ack to resend objects request

func (*Wrapper) SendData 

func (communication *Wrapper) SendData(orgID string, destType string, destID string, message []byte, chunked bool) common.SyncServiceError

SendData sends data from the CSS to the ESS or from the ESS to the CSS

func (*Wrapper) SendErrorMessage 

func (communication *Wrapper) SendErrorMessage(err common.SyncServiceError, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendErrorMessage sends an error message from the ESS to the CSS or from the CSS to the ESS

func (*Wrapper) SendFeedbackMessage 

func (communication *Wrapper) SendFeedbackMessage(code int, retryInterval int32, reason string, metaData *common.MetaData, sendToOrigin bool) common.SyncServiceError

SendFeedbackMessage sends a feedback message from the ESS to the CSS or from the CSS to the ESS

func (*Wrapper) SendNotificationMessage 

func (communication *Wrapper) SendNotificationMessage(notificationTopic string, destType string, destID string, instanceID int64, dataID int64,
	metaData *common.MetaData) common.SyncServiceError

SendNotificationMessage sends a notification message from the CSS to the ESS or from the ESS to the CSS

func (*Wrapper) SendPing 

func (communication *Wrapper) SendPing() common.SyncServiceError

SendPing sends a ping message from ESS to CSS

func (*Wrapper) StartCommunication 

func (communication *Wrapper) StartCommunication() common.SyncServiceError

StartCommunication starts communications

func (*Wrapper) StopCommunication 

func (communication *Wrapper) StopCommunication() common.SyncServiceError

StopCommunication stops communications

func (*Wrapper) UnlockDataChunks 

func (communication *Wrapper) UnlockDataChunks(index uint32, metadata *common.MetaData)

UnlockDataChunks unlocks one of the data chunks locks

func (*Wrapper) Unregister 

func (communication *Wrapper) Unregister() common.SyncServiceError

Unregister ESS TODO: implement Unregister() method for mqttCommunication

func (*Wrapper) UpdateOrganization 

func (communication *Wrapper) UpdateOrganization(org common.Organization, timestamp time.Time) common.SyncServiceError

UpdateOrganization adds or updates an organization

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