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JavaScript@langchain/langgraph-checkpointstoreMemoryStore
Class●Since v0.0Deprecated

MemoryStore

Copy
class MemoryStore

Bases

InMemoryStore

Used in Docs

  • Persistence
  • Stores

Constructors

constructor
constructor→ MemoryStore

Properties

property
indexConfig: IndexConfig | undefined

Methods

method
batch→ Promise<OperationResults<Op>>

Execute multiple operations in a single batch. This is more efficient than executing operations individually.

method
delete→ Promise<void>

Delete an item from the store.

method
get→ Promise<Item | null>

Retrieve a single item by its namespace and key.

method
listNamespaces→ Promise<string[][]>

List and filter namespaces in the store. Used to explore data organization and navigate the namespace hierarchy.

method
put→ Promise<void>

Store or update an item.

method
search→ Promise<SearchItem[]>

Search for items within a namespace prefix. Supports both metadata filtering and vector similarity search.

method
start

Start the store. Override if initialization is needed.

method
stop

Stop the store. Override if cleanup is needed.

Inherited fromInMemoryStore

Properties

PindexConfig: IndexConfig | undefined

Methods

Mbatch→ Promise<OperationResults<Op>>
—

Execute multiple operations in a single batch.

Mdelete→ Promise<void>
—

Delete an item from the store.

Mget→ Promise<Item | null>
—

Retrieve a single item by its namespace and key.

MlistNamespaces→ Promise<string[][]>
—

List and filter namespaces in the store.

Mput→ Promise<void>
—

Store or update an item.

Msearch→ Promise<SearchItem[]>
—

Search for items within a namespace prefix.

Mstart
—

Start the store. Override if initialization is needed.

Mstop
—

Stop the store. Override if cleanup is needed.

Inherited fromBaseStore

Methods

Mbatch→ Promise<OperationResults<Op>>
—

Execute multiple operations in a single batch.

Mdelete→ Promise<void>
—

Delete an item from the store.

Mget→ Promise<Item | null>
—

Retrieve a single item by its namespace and key.

MlistNamespaces→ Promise<string[][]>
—

List and filter namespaces in the store.

Mput→ Promise<void>
—

Store or update an item.

Msearch→ Promise<SearchItem[]>
—

Search for items within a namespace prefix.

Mstart
—

Start the store. Override if initialization is needed.

Mstop
—

Stop the store. Override if cleanup is needed.

View source on GitHub