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Showing content from https://api.js.langchain.com/classes/_langchain_core.callbacks_base.BaseCallbackHandler.html below:

BaseCallbackHandler | LangChain.js

• copy(): BaseCallbackHandler
• Returns BaseCallbackHandler
  • Defined in langchain-core/src/callbacks/base.ts:390

• handleAgentAction(action, runId, parentRunId?, tags?): void | Promise<void>
• Parameters
  • action: AgentAction
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns void | Promise<void>

  Inherited from BaseCallbackHandlerMethodsClass.handleAgentAction

  • Defined in langchain-core/src/callbacks/base.ts:222

• handleAgentEnd(action, runId, parentRunId?, tags?): void | Promise<void>
• Parameters
  • action: AgentFinish
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns void | Promise<void>

  Inherited from BaseCallbackHandlerMethodsClass.handleAgentEnd

  • Defined in langchain-core/src/callbacks/base.ts:233

• handleChainEnd(outputs, runId, parentRunId?, tags?, kwargs?): any
• Parameters
  • outputs: ChainValues
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • Optionalkwargs: {
        inputs?: Record<string, unknown>;
    }
    • Optionalinputs?: Record<string, unknown>
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleChainEnd

  • Defined in langchain-core/src/callbacks/base.ts:164

• handleChainError(err, runId, parentRunId?, tags?, kwargs?): any
• Parameters
  • err: any
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • Optionalkwargs: {
        inputs?: Record<string, unknown>;
    }
    • Optionalinputs?: Record<string, unknown>
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleChainError

  • Defined in langchain-core/src/callbacks/base.ts:152

• handleChainStart(chain, inputs, runId, parentRunId?, tags?, metadata?, runType?, runName?): any
• Parameters
  • chain: Serialized
  • inputs: ChainValues
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • Optionalmetadata: Record<string, unknown>
  • OptionalrunType: string
  • OptionalrunName: string
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleChainStart

  • Defined in langchain-core/src/callbacks/base.ts:137

• handleChatModelStart(llm, messages, runId, parentRunId?, extraParams?, tags?, metadata?, runName?): any
• Parameters
  • llm: Serialized
  • messages: BaseMessage[][]
  • runId: string
  • OptionalparentRunId: string
  • OptionalextraParams: Record<string, unknown>
  • Optionaltags: string[]
  • Optionalmetadata: Record<string, unknown>
  • OptionalrunName: string
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleChatModelStart

  • Defined in langchain-core/src/callbacks/base.ts:121

• handleCustomEvent(eventName, data, runId, tags?, metadata?): any
• Parameters
  • eventName: string
  • data: any
  • runId: string
  • Optionaltags: string[]
  • Optionalmetadata: Record<string, any>
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleCustomEvent

  • Defined in langchain-core/src/callbacks/base.ts:267

• handleLLMEnd(output, runId, parentRunId?, tags?, extraParams?): any
• Parameters
  • output: LLMResult
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • OptionalextraParams: Record<string, unknown>
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleLLMEnd

  • Defined in langchain-core/src/callbacks/base.ts:108

• handleLLMError(err, runId, parentRunId?, tags?, extraParams?): any
• Parameters
  • err: any
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • OptionalextraParams: Record<string, unknown>
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleLLMError

  • Defined in langchain-core/src/callbacks/base.ts:96

• handleLLMNewToken(token, idx, runId, parentRunId?, tags?, fields?): any
• Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleLLMNewToken

  • Defined in langchain-core/src/callbacks/base.ts:77

• handleLLMStart(llm, prompts, runId, parentRunId?, extraParams?, tags?, metadata?, runName?): any
• Parameters
  • llm: Serialized
  • prompts: string[]
  • runId: string
  • OptionalparentRunId: string
  • OptionalextraParams: Record<string, unknown>
  • Optionaltags: string[]
  • Optionalmetadata: Record<string, unknown>
  • OptionalrunName: string
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleLLMStart

  • Defined in langchain-core/src/callbacks/base.ts:62

• handleRetrieverEnd(documents, runId, parentRunId?, tags?): any
• Parameters
  • documents: DocumentInterface<Record<string, any>>[]
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleRetrieverEnd

  • Defined in langchain-core/src/callbacks/base.ts:251

• handleRetrieverError(err, runId, parentRunId?, tags?): any
• Parameters
  • err: any
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleRetrieverError

  • Defined in langchain-core/src/callbacks/base.ts:259

• handleRetrieverStart(retriever, query, runId, parentRunId?, tags?, metadata?, name?): any
• Parameters
  • retriever: Serialized
  • query: string
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • Optionalmetadata: Record<string, unknown>
  • Optionalname: string
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleRetrieverStart

  • Defined in langchain-core/src/callbacks/base.ts:240

• handleText(text, runId, parentRunId?, tags?): void | Promise<void>
• Parameters
  • text: string
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns void | Promise<void>

  Inherited from BaseCallbackHandlerMethodsClass.handleText

  • Defined in langchain-core/src/callbacks/base.ts:211

• handleToolEnd(output, runId, parentRunId?, tags?): any
• Parameters
  • output: any
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleToolEnd

  • Defined in langchain-core/src/callbacks/base.ts:202

• handleToolError(err, runId, parentRunId?, tags?): any
• Parameters
  • err: any
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleToolError

  • Defined in langchain-core/src/callbacks/base.ts:191

• handleToolStart(tool, input, runId, parentRunId?, tags?, metadata?, runName?): any
• Parameters
  • tool: Serialized
  • input: string
  • runId: string
  • OptionalparentRunId: string
  • Optionaltags: string[]
  • Optionalmetadata: Record<string, unknown>
  • OptionalrunName: string
  Returns any

  Inherited from BaseCallbackHandlerMethodsClass.handleToolStart

  • Defined in langchain-core/src/callbacks/base.ts:177

• toJSON(): Serialized
• Returns Serialized

  Implementation of Serializable.toJSON

  • Defined in langchain-core/src/callbacks/base.ts:396

• toJSONNotImplemented(): SerializedNotImplemented
• Returns SerializedNotImplemented

  Implementation of Serializable.toJSONNotImplemented

  • Defined in langchain-core/src/callbacks/base.ts:400

• fromMethods(methods): Handler
• Parameters
  • methods: BaseCallbackHandlerMethodsClass
  Returns Handler
  • Defined in langchain-core/src/callbacks/base.ts:404

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