db

package

v0.0.0-...-6206b6d Latest Latest Go to latest Published: Nov 4, 2021 License: MIT Imports: 9 Imported by: 0

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func Conflict(gamma *Command, delta *Command) bool

Conflict checks if two commands are conflicting as reorder them will end in different states

func ConflictBatch(batch1 []Command, batch2 []Command) bool

ConflictBatch checks if two batchs of commands are conflict

type Command struct {
	Key       Key
	Value     Value
	Type      CommandType
	ClientID  idservice.ID
	CommandID int
}

Commands of key-value database

func (c Command) Empty() bool

func (c Command) Equal(a Command) bool

func (c Command) Hash() string

func (c Command) String() string

type CommandType int

const (
	CmdRead CommandType = iota
	CmdWrite
	CmdDelete
	CmdImmediateRead
	CmdOneNodeRead
	CmdConfig
)

type Database interface {
	Execute(Command) Value
	History(Key) []Value
	Get(Key) Value
	Put(Key, Value)
}

Database defines a database interface TODO replace with more general StateMachine interface

func NewDatabase() Database

NewDatabase returns database that impelements Database interface

type Key int

Key type of the key-value database TODO key should be general too

type Value []byte

Value type of key-value database

func (v Value) Equals(v2 Value) bool