41 lines
994 B
Go
41 lines
994 B
Go
|
// Copyright (c) Mainflux
|
||
|
|
// SPDX-License-Identifier: Apache-2.0
|
||
|
|
|
||
|
|
package twins
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// State stores actual snapshot of entity's values
|
||
|
|
type State struct {
|
||
|
|
TwinID string
|
||
|
|
ID int64
|
||
|
|
Definition int
|
||
|
|
Created time.Time
|
||
|
|
Payload map[string]interface{}
|
||
|
|
}
|
||
|
|
|
||
|
|
// StatesPage contains page related metadata as well as a list of twins that
|
||
|
|
// belong to this page.
|
||
|
|
type StatesPage struct {
|
||
|
|
PageMetadata
|
||
|
|
States []State
|
||
|
|
}
|
||
|
|
|
||
|
|
// StateRepository specifies a state persistence API.
|
||
|
|
type StateRepository interface {
|
||
|
|
// Save persists the state
|
||
|
|
Save(context.Context, State) error
|
||
|
|
|
||
|
|
// Count returns the number of states related to state
|
||
|
|
Count(context.Context, Twin) (int64, error)
|
||
|
|
|
||
|
|
// RetrieveAll retrieves the subset of states related to twin specified by id
|
||
|
|
RetrieveAll(ctx context.Context, offset uint64, limit uint64, id string) (StatesPage, error)
|
||
|
|
|
||
|
|
// RetrieveLast retrieves the last saved state
|
||
|
|
RetrieveLast(ctx context.Context, id string) (State, error)
|
||
|
|
}
|