Class CallbackManager

Example

const prompt = PromptTemplate.fromTemplate("What is the answer to {question}?");

// Example of using LLMChain with OpenAI and a simple prompt
const chain = new LLMChain({
  llm: new ChatOpenAI({ temperature: 0.9 }),
  prompt,
});

// Running the chain with a single question
const result = await chain.call({
  question: "What is the airspeed velocity of an unladen swallow?",
});
console.log("The answer is:", result);

Hierarchy

BaseCallbackManager
- CallbackManager

Implements

BaseCallbackManagerMethods

Constructors

constructor

new CallbackManager(parentRunId?): CallbackManager
Parameters
- Optional parentRunId: string
Returns CallbackManager
Overrides BaseCallbackManager.constructor
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:508

Properties

handlers

handlers: BaseCallbackHandler[]

inheritableHandlers

inheritableHandlers: BaseCallbackHandler[]

inheritableMetadata

inheritableMetadata: Record<string, unknown> = {}

inheritableTags

inheritableTags: string[] = []

metadata

metadata: Record<string, unknown> = {}

name

name: string = "callback_manager"

Methods

addHandler

addHandler(handler, inherit?): void
Parameters
- handler: BaseCallbackHandler
- inherit: boolean = true
Returns void
Overrides BaseCallbackManager.addHandler
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:768

addMetadata

addMetadata(metadata, inherit?): void
Parameters
- metadata: Record<string, unknown>
- inherit: boolean = true
Returns void
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:805

addTags

addTags(tags, inherit?): void
Parameters
- tags: string[]
- inherit: boolean = true
Returns void
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:790

copy

copy(additionalHandlers?, inherit?): CallbackManager
Parameters
- additionalHandlers: BaseCallbackHandler[] = []
- inherit: boolean = true
Returns CallbackManager
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:819

handleChainStart

handleChainStart(chain, inputs, runId?, runType?, _tags?, _metadata?, runName?): Promise<CallbackManagerForChainRun>
Parameters
- chain: Serialized
- inputs: ChainValues
- runId: string = ...
- runType: undefined | string = undefined
- _tags: undefined | string[] = undefined
- _metadata: undefined | Record<string, unknown> = undefined
- runName: undefined | string = undefined
Returns Promise<CallbackManagerForChainRun>
Implementation of BaseCallbackManagerMethods.handleChainStart
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:635

handleChatModelStart

handleChatModelStart(llm, messages, _runId?, _parentRunId?, extraParams?, _tags?, _metadata?, runName?): Promise<CallbackManagerForLLMRun[]>
Parameters
- llm: Serialized
- messages: BaseMessage[][]
- _runId: undefined | string = undefined
- _parentRunId: undefined | string = undefined
- extraParams: undefined | Record<string, unknown> = undefined
- _tags: undefined | string[] = undefined
- _metadata: undefined | Record<string, unknown> = undefined
- runName: undefined | string = undefined
Returns Promise<CallbackManagerForLLMRun[]>
Implementation of BaseCallbackManagerMethods.handleChatModelStart
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:568

handleLLMStart

handleLLMStart(llm, prompts, _runId?, _parentRunId?, extraParams?, _tags?, _metadata?, runName?): Promise<CallbackManagerForLLMRun[]>
Parameters
- llm: Serialized
- prompts: string[]
- _runId: undefined | string = undefined
- _parentRunId: undefined | string = undefined
- extraParams: undefined | Record<string, unknown> = undefined
- _tags: undefined | string[] = undefined
- _metadata: undefined | Record<string, unknown> = undefined
- runName: undefined | string = undefined
Returns Promise<CallbackManagerForLLMRun[]>
Implementation of BaseCallbackManagerMethods.handleLLMStart
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:515

handleRetrieverStart

handleRetrieverStart(retriever, query, runId?, _parentRunId?, _tags?, _metadata?, runName?): Promise<CallbackManagerForRetrieverRun>
Parameters
- retriever: Serialized
- query: string
- runId: string = ...
- _parentRunId: undefined | string = undefined
- _tags: undefined | string[] = undefined
- _metadata: undefined | Record<string, unknown> = undefined
- runName: undefined | string = undefined
Returns Promise<CallbackManagerForRetrieverRun>
Implementation of BaseCallbackManagerMethods.handleRetrieverStart
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:724

handleToolStart

handleToolStart(tool, input, runId?, _parentRunId?, _tags?, _metadata?, runName?): Promise<CallbackManagerForToolRun>
Parameters
- tool: Serialized
- input: string
- runId: string = ...
- _parentRunId: undefined | string = undefined
- _tags: undefined | string[] = undefined
- _metadata: undefined | Record<string, unknown> = undefined
- runName: undefined | string = undefined
Returns Promise<CallbackManagerForToolRun>
Implementation of BaseCallbackManagerMethods.handleToolStart
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:680

removeHandler

removeHandler(handler): void
Parameters
- handler: BaseCallbackHandler
Returns void
Overrides BaseCallbackManager.removeHandler
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:775

removeMetadata

removeMetadata(metadata): void
Parameters
- metadata: Record<string, unknown>
Returns void
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:812

removeTags

removeTags(tags): void
Parameters
- tags: string[]
Returns void
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:798

setHandler

setHandler(handler): void
Parameters
- handler: BaseCallbackHandler
Returns void
Inherited from BaseCallbackManager.setHandler
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:92

setHandlers

setHandlers(handlers, inherit?): void
Parameters
- handlers: BaseCallbackHandler[]
- inherit: boolean = true
Returns void
Overrides BaseCallbackManager.setHandlers
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:782

`Static` configure

configure(inheritableHandlers?, localHandlers?, inheritableTags?, localTags?, inheritableMetadata?, localMetadata?, options?): Promise<undefined | CallbackManager>
Parameters
- Optional inheritableHandlers: Callbacks
- Optional localHandlers: Callbacks
- Optional inheritableTags: string[]
- Optional localTags: string[]
- Optional inheritableMetadata: Record<string, unknown>
- Optional localMetadata: Record<string, unknown>
- Optional options: CallbackManagerOptions
Returns Promise<undefined | CallbackManager>
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:865

`Static` fromHandlers

fromHandlers(handlers): CallbackManager
Parameters
- handlers: BaseCallbackHandlerMethodsClass
Returns CallbackManager
- Defined in docs/api_refs/langchain/src/callbacks/manager.ts:850

Class CallbackManager

Example

Hierarchy

Implements

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

Optional parentRunId: string

Returns CallbackManager

Properties

handlers

inheritableHandlers

inheritableMetadata

inheritableTags

metadata

name

tags

Methods

addHandler

Parameters

handler: BaseCallbackHandler

inherit: boolean = true

Returns void

addMetadata

Parameters

metadata: Record<string, unknown>

inherit: boolean = true

Returns void

addTags

Parameters

tags: string[]

inherit: boolean = true

Returns void

copy

Parameters

additionalHandlers: BaseCallbackHandler[] = []

inherit: boolean = true

Returns CallbackManager

handleChainStart

Parameters

chain: Serialized

inputs: ChainValues

runId: string = ...

runType: undefined | string = undefined

_tags: undefined | string[] = undefined

_metadata: undefined | Record<string, unknown> = undefined

runName: undefined | string = undefined

Returns Promise<CallbackManagerForChainRun>

handleChatModelStart

Parameters

llm: Serialized

messages: BaseMessage[][]

_runId: undefined | string = undefined

_parentRunId: undefined | string = undefined

extraParams: undefined | Record<string, unknown> = undefined

_tags: undefined | string[] = undefined

_metadata: undefined | Record<string, unknown> = undefined

runName: undefined | string = undefined

Returns Promise<CallbackManagerForLLMRun[]>

handleLLMStart

Parameters

llm: Serialized

prompts: string[]

_runId: undefined | string = undefined

_parentRunId: undefined | string = undefined

extraParams: undefined | Record<string, unknown> = undefined

_tags: undefined | string[] = undefined

_metadata: undefined | Record<string, unknown> = undefined

runName: undefined | string = undefined

Returns Promise<CallbackManagerForLLMRun[]>

handleRetrieverStart

Parameters

retriever: Serialized

query: string

runId: string = ...

_parentRunId: undefined | string = undefined

`Optional` parentRunId: string

`Static` configure

`Optional` inheritableHandlers: Callbacks

`Optional` localHandlers: Callbacks

`Optional` inheritableTags: string[]

`Optional` localTags: string[]

`Optional` inheritableMetadata: Record<string, unknown>

`Optional` localMetadata: Record<string, unknown>

`Optional` options: CallbackManagerOptions

`Static` fromHandlers