Class: Db<S, T>

Abstract base class implementing the database adapter interface.

Type parameters

Name	Description
S	The type of snapshot data.
T	The type of operation data.

Hierarchy

• Db

  ↳ MemoryDb

Implements

• IDatabaseAdapter<S, T>

Table of contents

Constructors

• constructor

Methods

• close
• commitOp
• commitSnapshot
• getCommittedOpVersion
• getDocument
• getFragment
• getOps
• getSnapshot

Constructors

constructor

• new Db<S, T>()

Type parameters

Name
S
T

Methods

close

▸ Abstract close(): Promise<void>

Closes the database connection.

Returns

Promise<void>

Implementation of

IDatabaseAdapter.close

---

commitOp

▸ Abstract commitOp(id, op, document, options?): Promise<boolean>

Commits an operation to the database.

Parameters

Name	Type
id	string
op	IOp<T>
document	IDocument
options?	unknown

Returns

Promise<boolean>

Implementation of

IDatabaseAdapter.commitOp

---

commitSnapshot

▸ Abstract commitSnapshot(id, snapshot, options?): Promise<boolean>

Commits a snapshot to the database.

Parameters

Name	Type
id	string
snapshot	ICommitSnapshot<S>
options?	unknown

Returns

Promise<boolean>

Implementation of

IDatabaseAdapter.commitSnapshot

---

getCommittedOpVersion

▸ getCommittedOpVersion(id, to, op): Promise<null | number>

Retrieves the committed version of an operation if it exists.

Parameters

Name	Type
id	string
to	number
op	IOp<object>

Returns

Promise<null | number>

Implementation of

IDatabaseAdapter.getCommittedOpVersion

---

getDocument

▸ Abstract getDocument(id, options?): Promise<null | IDocument>

Retrieves document information by ID.

Parameters

Name	Type
id	string
options?	unknown

Returns

Promise<null | IDocument>

Implementation of

IDatabaseAdapter.getDocument

---

getFragment

▸ Abstract getFragment(id, fragmentId, options?): Promise<null | { data: null | S ; version: number }>

Retrieves a specific fragment of a document by ID.

Parameters

Name	Type
id	string
fragmentId	string
options?	unknown

Returns

Promise<null | { data: null | S ; version: number }>

Implementation of

IDatabaseAdapter.getFragment

---

getOps

▸ Abstract getOps(id, from, to?, options?): Promise<IOp<T>[]>

Retrieves operations between two versions (inclusive of 'from', exclusive of 'to').

Parameters

Name	Type
id	string
from	number
to?	number
options?	unknown

Returns

Promise<IOp<T>[]>

Implementation of

IDatabaseAdapter.getOps

---

getSnapshot

▸ Abstract getSnapshot(id, options?): Promise<null | ISnapshot<S>>

Retrieves the snapshot of a document by ID.

Parameters

Name	Type
id	string
options?	unknown

Returns

Promise<null | ISnapshot<S>>

Implementation of

IDatabaseAdapter.getSnapshot