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 langchain-core/dist/callbacks/manager.d.ts:121

Properties

handlers

handlers: BaseCallbackHandler[]

inheritableHandlers

inheritableHandlers: BaseCallbackHandler[]

inheritableMetadata

inheritableMetadata: Record<string, unknown>

inheritableTags

inheritableTags: string[]

metadata

metadata: Record<string, unknown>

name

name: string

Methods

addHandler

addHandler(handler, inherit?): void
Parameters
- handler: BaseCallbackHandler
- Optional inherit: boolean
Returns void
Overrides BaseCallbackManager.addHandler
- Defined in langchain-core/dist/callbacks/manager.d.ts:127

addMetadata

addMetadata(metadata, inherit?): void
Parameters
- metadata: Record<string, unknown>
- Optional inherit: boolean
Returns void
- Defined in langchain-core/dist/callbacks/manager.d.ts:132

addTags

addTags(tags, inherit?): void
Parameters
- tags: string[]
- Optional inherit: boolean
Returns void
- Defined in langchain-core/dist/callbacks/manager.d.ts:130

copy

copy(additionalHandlers?, inherit?): CallbackManager
Parameters
- Optional additionalHandlers: BaseCallbackHandler[]
- Optional inherit: boolean
Returns CallbackManager
- Defined in langchain-core/dist/callbacks/manager.d.ts:134

handleChainStart

handleChainStart(chain, inputs, runId?, runType?, _tags?, _metadata?, runName?): Promise<CallbackManagerForChainRun>
Parameters
- chain: Serialized
- inputs: ChainValues
- Optional runId: string
- Optional runType: string
- Optional _tags: string[]
- Optional _metadata: Record<string, unknown>
- Optional runName: string
Returns Promise<CallbackManagerForChainRun>
Implementation of BaseCallbackManagerMethods.handleChainStart
- Defined in langchain-core/dist/callbacks/manager.d.ts:124

handleChatModelStart

handleChatModelStart(llm, messages, _runId?, _parentRunId?, extraParams?, _tags?, _metadata?, runName?): Promise<CallbackManagerForLLMRun[]>
Parameters
- llm: Serialized
- messages: BaseMessage[][]
- Optional _runId: string
- Optional _parentRunId: string
- Optional extraParams: Record<string, unknown>
- Optional _tags: string[]
- Optional _metadata: Record<string, unknown>
- Optional runName: string
Returns Promise<CallbackManagerForLLMRun[]>
Implementation of BaseCallbackManagerMethods.handleChatModelStart
- Defined in langchain-core/dist/callbacks/manager.d.ts:123

handleLLMStart

handleLLMStart(llm, prompts, _runId?, _parentRunId?, extraParams?, _tags?, _metadata?, runName?): Promise<CallbackManagerForLLMRun[]>
Parameters
- llm: Serialized
- prompts: string[]
- Optional _runId: string
- Optional _parentRunId: string
- Optional extraParams: Record<string, unknown>
- Optional _tags: string[]
- Optional _metadata: Record<string, unknown>
- Optional runName: string
Returns Promise<CallbackManagerForLLMRun[]>
Implementation of BaseCallbackManagerMethods.handleLLMStart
- Defined in langchain-core/dist/callbacks/manager.d.ts:122

handleRetrieverStart

handleRetrieverStart(retriever, query, runId?, _parentRunId?, _tags?, _metadata?, runName?): Promise<CallbackManagerForRetrieverRun>
Parameters
- retriever: Serialized
- query: string
- Optional runId: string
- Optional _parentRunId: string
- Optional _tags: string[]
- Optional _metadata: Record<string, unknown>
- Optional runName: string
Returns Promise<CallbackManagerForRetrieverRun>
Implementation of BaseCallbackManagerMethods.handleRetrieverStart
- Defined in langchain-core/dist/callbacks/manager.d.ts:126

handleToolStart

handleToolStart(tool, input, runId?, _parentRunId?, _tags?, _metadata?, runName?): Promise<CallbackManagerForToolRun>
Parameters
- tool: Serialized
- input: string
- Optional runId: string
- Optional _parentRunId: string
- Optional _tags: string[]
- Optional _metadata: Record<string, unknown>
- Optional runName: string
Returns Promise<CallbackManagerForToolRun>
Implementation of BaseCallbackManagerMethods.handleToolStart
- Defined in langchain-core/dist/callbacks/manager.d.ts:125

removeHandler

removeHandler(handler): void
Parameters
- handler: BaseCallbackHandler
Returns void
Overrides BaseCallbackManager.removeHandler
- Defined in langchain-core/dist/callbacks/manager.d.ts:128

removeMetadata

removeMetadata(metadata): void
Parameters
- metadata: Record<string, unknown>
Returns void
- Defined in langchain-core/dist/callbacks/manager.d.ts:133

removeTags

removeTags(tags): void
Parameters
- tags: string[]
Returns void
- Defined in langchain-core/dist/callbacks/manager.d.ts:131

setHandler

setHandler(handler): void
Parameters
- handler: BaseCallbackHandler
Returns void
Inherited from BaseCallbackManager.setHandler
- Defined in langchain-core/dist/callbacks/manager.d.ts:46

setHandlers

setHandlers(handlers, inherit?): void
Parameters
- handlers: BaseCallbackHandler[]
- Optional inherit: boolean
Returns void
Overrides BaseCallbackManager.setHandlers
- Defined in langchain-core/dist/callbacks/manager.d.ts:129

`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 langchain-core/dist/callbacks/manager.d.ts:136

`Static` fromHandlers

fromHandlers(handlers): CallbackManager
Parameters
- handlers: BaseCallbackHandlerMethodsClass
Returns CallbackManager
- Defined in langchain-core/dist/callbacks/manager.d.ts:135

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

Optional inherit: boolean

Returns void

addMetadata

Parameters

metadata: Record<string, unknown>

Optional inherit: boolean

Returns void

addTags

Parameters

tags: string[]

Optional inherit: boolean

Returns void

copy

Parameters

Optional additionalHandlers: BaseCallbackHandler[]

Optional inherit: boolean

Returns CallbackManager

handleChainStart

Parameters

chain: Serialized

inputs: ChainValues

Optional runId: string

Optional runType: string

Optional _tags: string[]

Optional _metadata: Record<string, unknown>

Optional runName: string

Returns Promise<CallbackManagerForChainRun>

handleChatModelStart

Parameters

llm: Serialized

messages: BaseMessage[][]

Optional _runId: string

Optional _parentRunId: string

Optional extraParams: Record<string, unknown>

Optional _tags: string[]

Optional _metadata: Record<string, unknown>

Optional runName: string

Returns Promise<CallbackManagerForLLMRun[]>

handleLLMStart

Parameters

llm: Serialized

prompts: string[]

Optional _runId: string

Optional _parentRunId: string

Optional extraParams: Record<string, unknown>

Optional _tags: string[]

Optional _metadata: Record<string, unknown>

Optional runName: string

Returns Promise<CallbackManagerForLLMRun[]>

handleRetrieverStart

Parameters

retriever: Serialized

query: string

Optional runId: string

Optional _parentRunId: string

`Optional` parentRunId: string

`Optional` inherit: boolean

`Optional` inherit: boolean

`Optional` inherit: boolean

`Optional` additionalHandlers: BaseCallbackHandler[]

`Optional` inherit: boolean

`Optional` runId: string

`Optional` runType: string

`Optional` _tags: string[]

`Optional` _metadata: Record<string, unknown>

`Optional` runName: string

`Optional` _runId: string

`Optional` _parentRunId: string

`Optional` extraParams: Record<string, unknown>

`Optional` _tags: string[]

`Optional` _metadata: Record<string, unknown>

`Optional` runName: string

`Optional` _runId: string

`Optional` _parentRunId: string

`Optional` extraParams: Record<string, unknown>

`Optional` _tags: string[]

`Optional` _metadata: Record<string, unknown>

`Optional` runName: string

`Optional` runId: string

`Optional` _parentRunId: string

`Optional` _tags: string[]

`Optional` _metadata: Record<string, unknown>

`Optional` runName: string

`Optional` runId: string

`Optional` _parentRunId: string

`Optional` _tags: string[]

`Optional` _metadata: Record<string, unknown>

`Optional` runName: string

`Optional` inherit: boolean

`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