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

MemoryStore

Copy
class MemoryStore

Bases

InMemoryStore

Used in Docs

  • Persistence

Constructors

Properties

Methods

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.

View source on GitHub
M
get
→ 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<Item[]>
—

Search for items within a namespace prefix.

Mstart
—

Start the store. Override if initialization is needed.

Mstop→ Promise<void>
—

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<Item[]>
—

Search for items within a namespace prefix.

Mstart
—

Start the store. Override if initialization is needed.

Mstop→ Promise<void>
—

Stop the store. Override if cleanup is needed.

constructor
constructor→ MemoryStore
property
indexConfig: IndexConfig | undefined
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→ void | Promise<void>

Start the store. Override if initialization is needed.

method
stop→ void | Promise<void>

Stop the store. Override if cleanup is needed.