mrcom_orderer

Documentation

Index

• Constants
• func NewComponent(storage Storage, eventBox mrcore.EventBox) *component
• func NewEntityMeta(tableName string, primaryName string, conds ...any) *entityMeta
• func NewRepository(client mrstorage.DbConn, queryBuilder squirrel.StatementBuilderType) *repository
• type Component
• type EntityMeta
• type EntityNode
• type Storage

Constants

const ModelNameEntityOrderer = "EntityOrderer"

Functions

func NewComponent

func NewComponent(
	storage Storage,
	eventBox mrcore.EventBox,
) *component

func NewEntityMeta

func NewEntityMeta(tableName string, primaryName string, conds ...any) *entityMeta

func NewRepository

func NewRepository(
	client mrstorage.DbConn,
	queryBuilder squirrel.StatementBuilderType,
) *repository

NewRepository -

Types

type Component

type Component interface {
	WithMetaData(meta EntityMeta) Component
	InsertToFirst(ctx context.Context, nodeId mrentity.KeyInt32) error
	InsertToLast(ctx context.Context, nodeId mrentity.KeyInt32) error
	MoveToLast(ctx context.Context, nodeId mrentity.KeyInt32) error
	MoveToFirst(ctx context.Context, nodeId mrentity.KeyInt32) error
	MoveAfterId(ctx context.Context, nodeId mrentity.KeyInt32, afterNodeId mrentity.KeyInt32) error
	Unlink(ctx context.Context, nodeId mrentity.KeyInt32) error
}

type EntityMeta

type EntityMeta interface {
	TableName() string
	PrimaryName() string
	ForEachCond(func(cond any))
}

type EntityNode

type EntityNode struct {
	Id         mrentity.KeyInt32
	PrevId     mrentity.ZeronullInt32
	NextId     mrentity.ZeronullInt32
	OrderField mrentity.ZeronullInt64
}

type Storage

type Storage interface {
	WithMetaData(meta EntityMeta) Storage
	LoadNode(ctx context.Context, row *EntityNode) error
	LoadFirstNode(ctx context.Context, row *EntityNode) error
	LoadLastNode(ctx context.Context, row *EntityNode) error
	UpdateNode(ctx context.Context, row *EntityNode) error
	UpdateNodePrevId(ctx context.Context, id mrentity.KeyInt32, prevId mrentity.ZeronullInt32) error
	UpdateNodeNextId(ctx context.Context, id mrentity.KeyInt32, nextId mrentity.ZeronullInt32) error
	RecalcOrderField(ctx context.Context, minBorder mrentity.Int64, step mrentity.Int64) error
}