Class●Since v1.0

InMemoryStore

In-memory implementation of the BaseStore using a dictionary. Used for storing key-value pairs in memory.

class InMemoryStore

Bases

BaseStore<string, T>

Example

const store = new InMemoryStore<BaseMessage>();
await store.mset(
  Array.from({ length: 5 }).map((_, index) => [
    `message:id:${index}`,
    index % 2 === 0
      ? new AIMessage("ai stuff...")
      : new HumanMessage("human stuff..."),
  ]),
);

const retrievedMessages = await store.mget(["message:id:0", "message:id:1"]);
await store.mdelete(await store.yieldKeys("message:id:").toArray());

Constructors

Properties

property

lc_kwargs: SerializedFields

property

lc_namespace: string[]

A path to the module that contains the class, eg. ["langchain", "llms"] Usually should be the same as the entrypoint the class is exported from.

property

lc_serializable: boolean

property

store: Record<string, T>

property

lc_aliases: __type | undefined

property

lc_attributes: __type | undefined

property

lc_id: string[]

property

lc_secrets: __type | undefined

property

lc_serializable_keys: string[] | undefined

Methods

mdelete→ Promise<void>

Abstract method to delete multiple keys.

mget→ Promise<V | undefined[]>

Abstract method to get multiple values for a set of keys.

mset→ Promise<void>

Abstract method to set a value for multiple keys.

toJSON→ Serialized

toJSONNotImplemented→ SerializedNotImplemented

yieldKeys→ AsyncGenerator<string | K>

Abstract method to yield keys optionally based on a prefix.

lc_name→ string

The name of the serializable. Override to provide an alias or to preserve the serialized module name in minified environments.

Implemented as a static method to support loading logic.

Inherited fromBaseStore

Properties

Plc_kwargs: SerializedFields Plc_namespace: ["langchain_core", "callbacks", string]

A path to the module that contains the class, eg. ["langchain", "llms"]

Plc_serializable: boolean Plc_aliases: __type | undefined Plc_attributes: __type | undefined Plc_id: string[]Plc_secrets: __type | undefined Plc_serializable_keys: string[] | undefined

Methods

Mmdelete→ Promise<void>

Abstract method to delete multiple keys.

Mmget→ Promise<V | undefined[]>

Abstract method to get multiple values for a set of keys.

Mmset→ Promise<void>

Abstract method to set a value for multiple keys.

MtoJSON→ Serialized MtoJSONNotImplemented→ SerializedNotImplemented MyieldKeys→ AsyncGenerator<string | K>

Abstract method to yield keys optionally based on a prefix.

Mlc_name→ string

The name of the serializable. Override to provide an alias or

Inherited fromSerializable

Properties

Plc_kwargs: SerializedFields Plc_namespace: ["langchain_core", "callbacks", string]

A path to the module that contains the class, eg. ["langchain", "llms"]

Plc_serializable: boolean Plc_aliases: __type | undefined Plc_attributes: __type | undefined Plc_id: string[]Plc_secrets: __type | undefined Plc_serializable_keys: string[] | undefined

Methods

MtoJSON→ Serialized MtoJSONNotImplemented→ SerializedNotImplemented Mlc_name→ string

The name of the serializable. Override to provide an alias or

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