database

package
v0.4.4 Latest Latest
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 Go to latest Published: Jul 4, 2023 License: Apache-2.0 Imports: 14 Imported by: 1

Documentation

Overview

Package database provides the database interface for the Yorkie backend.

Index

Constants

View Source 
const (
	ClientDeactivated = "deactivated"
	ClientActivated   = "activated"
)

Below are statuses of the client.

View Source 
const (
	DocumentAttached = "attached"
	DocumentDetached = "detached"
	DocumentRemoved  = "removed"
)

Below are statuses of the document.

Variables

View Source 
var (
	ErrClientNotActivated      = errors.New("client not activated")
	ErrDocumentNotAttached     = errors.New("document not attached")
	ErrDocumentNeverAttached   = errors.New("client has never attached the document")
	ErrDocumentAlreadyAttached = errors.New("document already attached")
)

Below are the errors may occur depending on the document and client status.

View Source 
var (
	// ErrProjectAlreadyExists is returned when the project already exists.
	ErrProjectAlreadyExists = errors.New("project already exists")

	// ErrUserNotFound is returned when the user is not found.
	ErrUserNotFound = errors.New("user not found")

	// ErrProjectNotFound is returned when the project is not found.
	ErrProjectNotFound = errors.New("project not found")

	// ErrUserAlreadyExists is returned when the user already exists.
	ErrUserAlreadyExists = errors.New("user already exists")

	// ErrClientNotFound is returned when the client could not be found.
	ErrClientNotFound = errors.New("client not found")

	// ErrDocumentNotFound is returned when the document could not be found.
	ErrDocumentNotFound = errors.New("document not found")

	// ErrClientDocNotFound is returned when mapping between client and document could not be found.
	ErrClientDocNotFound = errors.New("client document not found")

	// ErrConflictOnUpdate is returned when a conflict occurs during update.
	ErrConflictOnUpdate = errors.New("conflict on update")

	// ErrProjectNameAlreadyExists is returned when the project name already exists.
	ErrProjectNameAlreadyExists = errors.New("project name already exists")
)
View Source 
var DefaultProjectID = types.ID("000000000000000000000000")

DefaultProjectID is the default project ID.

View Source 
var DefaultProjectName = "default"

DefaultProjectName is the default project name.

View Source 
var ErrEncodeOperationFailed = errors.New("encode operations failed")

ErrEncodeOperationFailed is returned when encoding operations failed.

View Source 
var ErrInvalidTimeDurationString = errors.New("invalid time duration string format")

ErrInvalidTimeDurationString is returned when the given time duration string is not in valid format.

View Source 
var (
	// ErrMismatchedPassword is returned when the password is mismatched.
	ErrMismatchedPassword = fmt.Errorf("mismatched password")
)

Functions

func CompareHashAndPassword added in v0.2.14 

func CompareHashAndPassword(hashed, password string) error

CompareHashAndPassword compares the hashed password and the password.

func EncodeOperations 

func EncodeOperations(operations []operations.Operation) ([][]byte, error)

EncodeOperations encodes the given operations into bytes array.

func HashedPassword added in v0.2.14 

func HashedPassword(password string) (string, error)

HashedPassword hashes the given password.

Types

type ChangeInfo 

type ChangeInfo struct {
	ID         types.ID `bson:"_id"`
	DocID      types.ID `bson:"doc_id"`
	ServerSeq  int64    `bson:"server_seq"`
	ClientSeq  uint32   `bson:"client_seq"`
	Lamport    int64    `bson:"lamport"`
	ActorID    types.ID `bson:"actor_id"`
	Message    string   `bson:"message"`
	Operations [][]byte `bson:"operations"`
}

ChangeInfo is a structure representing information of a change.

func (*ChangeInfo) DeepCopy added in v0.3.4 

func (i *ChangeInfo) DeepCopy() *ChangeInfo

DeepCopy returns a deep copy of this ChangeInfo.

func (*ChangeInfo) ToChange 

func (i *ChangeInfo) ToChange() (*change.Change, error)

ToChange creates Change model from this ChangeInfo.

type ClientDocInfo 

type ClientDocInfo struct {
	Status    string `bson:"status"`
	ServerSeq int64  `bson:"server_seq"`
	ClientSeq uint32 `bson:"client_seq"`
}

ClientDocInfo is a structure representing information of the document attached to the client.

type ClientInfo 

type ClientInfo struct {
	// ID is the unique ID of the client.
	ID types.ID `bson:"_id"`

	// ProjectID is the ID of the project the client belongs to.
	ProjectID types.ID `bson:"project_id"`

	// Key is the key of the client. It is used to identify the client by users.
	Key string `bson:"key"`

	// Status is the status of the client.
	Status string `bson:"status"`

	// Documents is a map of document which is attached to the client.
	Documents map[types.ID]*ClientDocInfo `bson:"documents"`

	// CreatedAt is the time when the client was created.
	CreatedAt time.Time `bson:"created_at"`

	// UpdatedAt is the last time the client was accessed.
	// NOTE(hackerwins): The field name is "updated_at" but it is used as
	// "accessed_at".
	UpdatedAt time.Time `bson:"updated_at"`
}

ClientInfo is a structure representing information of a client.

func (*ClientInfo) AttachDocument 

func (i *ClientInfo) AttachDocument(docID types.ID) error

AttachDocument attaches the given document to this client.

func (*ClientInfo) CheckIfInProject 

func (i *ClientInfo) CheckIfInProject(projectID types.ID) error

CheckIfInProject checks if the client is in the project.

func (*ClientInfo) Checkpoint 

func (i *ClientInfo) Checkpoint(docID types.ID) change.Checkpoint

Checkpoint returns the checkpoint of the given document.

func (*ClientInfo) Deactivate 

func (i *ClientInfo) Deactivate()

Deactivate sets the status of this client to be deactivated.

func (*ClientInfo) DeepCopy 

func (i *ClientInfo) DeepCopy() *ClientInfo

DeepCopy returns a deep copy of this client info.

func (*ClientInfo) DetachDocument 

func (i *ClientInfo) DetachDocument(docID types.ID) error

DetachDocument detaches the given document from this client.

func (*ClientInfo) EnsureDocumentAttached 

func (i *ClientInfo) EnsureDocumentAttached(docID types.ID) error

EnsureDocumentAttached ensures the given document is attached.

func (*ClientInfo) IsAttached 

func (i *ClientInfo) IsAttached(docID types.ID) (bool, error)

IsAttached returns whether the given document is attached to this client.

func (*ClientInfo) RemoveDocument added in v0.3.3 

func (i *ClientInfo) RemoveDocument(docID types.ID) error

RemoveDocument removes the given document from this client.

func (*ClientInfo) UpdateCheckpoint 

func (i *ClientInfo) UpdateCheckpoint(
	docID types.ID,
	cp change.Checkpoint,
) error

UpdateCheckpoint updates the checkpoint of the given document.

type Database 

type Database interface {
	// Close all resources of this database.
	Close() error

	// FindProjectInfoByPublicKey returns a project by public key.
	FindProjectInfoByPublicKey(
		ctx context.Context,
		publicKey string,
	) (*ProjectInfo, error)

	// FindProjectInfoByName returns a project by the given name.
	FindProjectInfoByName(
		ctx context.Context,
		owner types.ID,
		name string,
	) (*ProjectInfo, error)

	// FindProjectInfoByID returns a project by the given id. It should not be
	// used directly by clients because it is not checked if the project is
	// permitted to be accessed by the admin client.
	FindProjectInfoByID(ctx context.Context, id types.ID) (*ProjectInfo, error)

	// EnsureDefaultUserAndProject ensures that the default user and project
	// exists.
	EnsureDefaultUserAndProject(
		ctx context.Context,
		username,
		password string,
		clientDeactivateThreshold string,
	) (*UserInfo, *ProjectInfo, error)

	// CreateProjectInfo creates a new project.
	CreateProjectInfo(
		ctx context.Context,
		name string,
		owner types.ID,
		clientDeactivateThreshold string,
	) (*ProjectInfo, error)

	// ListProjectInfos returns all project infos owned by owner.
	ListProjectInfos(ctx context.Context, owner types.ID) ([]*ProjectInfo, error)

	// UpdateProjectInfo updates the project.
	UpdateProjectInfo(
		ctx context.Context,
		owner types.ID,
		id types.ID,
		fields *types.UpdatableProjectFields,
	) (*ProjectInfo, error)

	// CreateUserInfo creates a new user.
	CreateUserInfo(
		ctx context.Context,
		username string,
		hashedPassword string,
	) (*UserInfo, error)

	// FindUserInfo returns a user by the given username.
	FindUserInfo(ctx context.Context, username string) (*UserInfo, error)

	// ListUserInfos returns all users.
	ListUserInfos(ctx context.Context) ([]*UserInfo, error)

	// ActivateClient activates the client of the given key.
	ActivateClient(ctx context.Context, projectID types.ID, key string) (*ClientInfo, error)

	// DeactivateClient deactivates the client of the given ID.
	DeactivateClient(ctx context.Context, projectID, clientID types.ID) (*ClientInfo, error)

	// FindClientInfoByID finds the client of the given ID.
	FindClientInfoByID(ctx context.Context, projectID, clientID types.ID) (*ClientInfo, error)

	// UpdateClientInfoAfterPushPull updates the client from the given clientInfo
	// after handling PushPull.
	UpdateClientInfoAfterPushPull(ctx context.Context, clientInfo *ClientInfo, docInfo *DocInfo) error

	// FindDeactivateCandidates finds the housekeeping candidates.
	FindDeactivateCandidates(
		ctx context.Context,
		candidatesLimitPerProject int,
	) ([]*ClientInfo, error)

	// FindDocInfoByKey finds the document of the given key.
	FindDocInfoByKey(
		ctx context.Context,
		projectID types.ID,
		docKey key.Key,
	) (*DocInfo, error)

	// FindDocInfoByKeyAndOwner finds the document of the given key. If the
	// createDocIfNotExist condition is true, create the document if it does not
	// exist.
	FindDocInfoByKeyAndOwner(
		ctx context.Context,
		projectID types.ID,
		clientID types.ID,
		docKey key.Key,
		createDocIfNotExist bool,
	) (*DocInfo, error)

	// FindDocInfoByID finds the document of the given ID.
	FindDocInfoByID(
		ctx context.Context,
		projectID types.ID,
		id types.ID,
	) (*DocInfo, error)

	// UpdateDocInfoStatusToRemoved updates the document status to removed.
	UpdateDocInfoStatusToRemoved(
		ctx context.Context,
		projectID types.ID,
		docID types.ID,
	) error

	// CreateChangeInfos stores the given changes then updates the given docInfo.
	CreateChangeInfos(
		ctx context.Context,
		projectID types.ID,
		docInfo *DocInfo,
		initialServerSeq int64,
		changes []*change.Change,
		isRemoved bool,
	) error

	// PurgeStaleChanges delete changes before the smallest in `syncedseqs` to
	// save storage.
	PurgeStaleChanges(
		ctx context.Context,
		docID types.ID,
	) error

	// FindChangesBetweenServerSeqs returns the changes between two server sequences.
	FindChangesBetweenServerSeqs(
		ctx context.Context,
		docID types.ID,
		from int64,
		to int64,
	) ([]*change.Change, error)

	// FindChangeInfosBetweenServerSeqs returns the changeInfos between two server sequences.
	FindChangeInfosBetweenServerSeqs(
		ctx context.Context,
		docID types.ID,
		from int64,
		to int64,
	) ([]*ChangeInfo, error)

	// CreateSnapshotInfo stores the snapshot of the given document.
	CreateSnapshotInfo(ctx context.Context, docID types.ID, doc *document.InternalDocument) error

	// FindClosestSnapshotInfo finds the closest snapshot info in a given serverSeq.
	FindClosestSnapshotInfo(ctx context.Context, docID types.ID, serverSeq int64) (*SnapshotInfo, error)

	// FindMinSyncedSeqInfo finds the minimum synced sequence info.
	FindMinSyncedSeqInfo(ctx context.Context, docID types.ID) (*SyncedSeqInfo, error)

	// UpdateAndFindMinSyncedTicket updates the given serverSeq of the given client
	// and returns the min synced ticket.
	UpdateAndFindMinSyncedTicket(
		ctx context.Context,
		clientInfo *ClientInfo,
		docID types.ID,
		serverSeq int64,
	) (*time.Ticket, error)

	// UpdateSyncedSeq updates the syncedSeq of the given client.
	UpdateSyncedSeq(
		ctx context.Context,
		clientInfo *ClientInfo,
		docID types.ID,
		serverSeq int64,
	) error

	// FindDocInfosByPaging returns the documentInfos of the given paging.
	FindDocInfosByPaging(
		ctx context.Context,
		projectID types.ID,
		paging types.Paging[types.ID],
	) ([]*DocInfo, error)

	// FindDocInfosByQuery returns the documentInfos which match the given query.
	FindDocInfosByQuery(
		ctx context.Context,
		projectID types.ID,
		query string,
		pageSize int,
	) (*types.SearchResult[*DocInfo], error)

	// IsDocumentAttached returns true if the document is attached to clients.
	IsDocumentAttached(
		ctx context.Context,
		projectID types.ID,
		docID types.ID,
		excludeClientID types.ID,
	) (bool, error)
}

Database represents database which reads or saves Yorkie data.

type DocInfo 

type DocInfo struct {
	// ID is the unique ID of the document.
	ID types.ID `bson:"_id"`

	// ProjectID is the ID of the project that the document belongs to.
	ProjectID types.ID `bson:"project_id"`

	// Key is the key of the document.
	Key key.Key `bson:"key"`

	// ServerSeq is the sequence number of the last change of the document on the server.
	ServerSeq int64 `bson:"server_seq"`

	// Owner is the owner(ID of the client) of the document.
	Owner types.ID `bson:"owner"`

	// CreatedAt is the time when the document is created.
	CreatedAt time.Time `bson:"created_at"`

	// AccessedAt is the time when the document is accessed.
	AccessedAt time.Time `bson:"accessed_at"`

	// UpdatedAt is the time when the document is updated.
	UpdatedAt time.Time `bson:"updated_at"`

	// RemovedAt is the time when the document is removed.
	RemovedAt time.Time `bson:"removed_at"`
}

DocInfo is a structure representing information of the document.

func (*DocInfo) DeepCopy 

func (info *DocInfo) DeepCopy() *DocInfo

DeepCopy creates a deep copy of this DocInfo.

func (*DocInfo) IncreaseServerSeq 

func (info *DocInfo) IncreaseServerSeq() int64

IncreaseServerSeq increases server sequence of the document.

func (*DocInfo) IsRemoved added in v0.3.3 

func (info *DocInfo) IsRemoved() bool

IsRemoved returns true if the document is removed

type ProjectInfo 

type ProjectInfo struct {
	// ID is the unique ID of the project.
	ID types.ID `bson:"_id"`

	// Name is the name of this project.
	Name string `bson:"name"`

	// Owner is the owner of this project.
	Owner types.ID `bson:"owner"`

	// PublicKey is the API key of this project.
	PublicKey string `bson:"public_key"`

	// SecretKey is the secret key of this project.
	SecretKey string `bson:"secret_key"`

	// AuthWebhookURL is the url of the authorization webhook.
	AuthWebhookURL string `bson:"auth_webhook_url"`

	// AuthWebhookMethods is the methods that run the authorization webhook.
	AuthWebhookMethods []string `bson:"auth_webhook_methods"`

	// ClientDeactivateThreshold is the time after which clients in
	// specific project are considered deactivate for housekeeping.
	ClientDeactivateThreshold string `bson:"client_deactivate_threshold"`

	// CreatedAt is the time when the project was created.
	CreatedAt time.Time `bson:"created_at"`

	// UpdatedAt is the time when the project was updated.
	UpdatedAt time.Time `bson:"updated_at"`
}

ProjectInfo is a struct for project information.

func NewProjectInfo 

func NewProjectInfo(name string, owner types.ID, clientDeactivateThreshold string) *ProjectInfo

NewProjectInfo creates a new ProjectInfo of the given name.

func ToProjectInfo 

func ToProjectInfo(project *types.Project) *ProjectInfo

ToProjectInfo converts the given types.Project to ProjectInfo.

func (*ProjectInfo) ClientDeactivateThresholdAsTimeDuration added in v0.3.1 

func (i *ProjectInfo) ClientDeactivateThresholdAsTimeDuration() (time.Duration, error)

ClientDeactivateThresholdAsTimeDuration converts ClientDeactivateThreshold string to time.Duration.

func (*ProjectInfo) DeepCopy 

func (i *ProjectInfo) DeepCopy() *ProjectInfo

DeepCopy returns a deep copy of the ProjectInfo.

func (*ProjectInfo) ToProject 

func (i *ProjectInfo) ToProject() *types.Project

ToProject converts the ProjectInfo to the Project.

func (*ProjectInfo) UpdateFields added in v0.2.8 

func (i *ProjectInfo) UpdateFields(fields *types.UpdatableProjectFields)

UpdateFields updates the fields.

type SnapshotInfo 

type SnapshotInfo struct {
	// ID is the unique ID of the snapshot.
	ID types.ID `bson:"_id"`

	// DocID is the ID of the document which the snapshot belongs to.
	DocID types.ID `bson:"doc_id"`

	// ServerSeq is the sequence number of the server which the snapshot belongs to.
	ServerSeq int64 `bson:"server_seq"`

	// Lamport is the Lamport timestamp of the snapshot.
	Lamport int64 `bson:"lamport"`

	// Snapshot is the snapshot data.
	Snapshot []byte `bson:"snapshot"`

	// CreatedAt is the time when the snapshot is created.
	CreatedAt time.Time `bson:"created_at"`
}

SnapshotInfo is a structure representing information of the snapshot.

type SyncedSeqInfo 

type SyncedSeqInfo struct {
	ID        types.ID `bson:"_id"`
	DocID     types.ID `bson:"doc_id"`
	ClientID  types.ID `bson:"client_id"`
	Lamport   int64    `bson:"lamport"`
	ActorID   types.ID `bson:"actor_id"`
	ServerSeq int64    `bson:"server_seq"`
}

SyncedSeqInfo is a structure representing information about the synchronized sequence for each client.

type UserInfo added in v0.2.14 

type UserInfo struct {
	ID             types.ID  `bson:"_id"`
	Username       string    `bson:"username"`
	HashedPassword string    `bson:"hashed_password"`
	CreatedAt      time.Time `bson:"created_at"`
}

UserInfo is a structure representing information of a user.

func NewUserInfo added in v0.2.14 

func NewUserInfo(username, hashedPassword string) *UserInfo

NewUserInfo creates a new UserInfo of the given username.

func (*UserInfo) DeepCopy added in v0.2.14 

func (i *UserInfo) DeepCopy() *UserInfo

DeepCopy returns a deep copy of the UserInfo

func (*UserInfo) ToUser added in v0.2.14 

func (i *UserInfo) ToUser() *types.User

ToUser converts the UserInfo to a User.

Source Files

View all Source files

Directories

Path Synopsis
Package memory implements the database interface using in-memory database.
 Package memory implements the database interface using in-memory database.
Package mongo implements database interfaces using MongoDB.
 Package mongo implements database interfaces using MongoDB.
Package testcases contains testcases for database.
 Package testcases contains testcases for database.

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