Function●Since v1.0

registerConfigureHook

There are two ways to use this:

Using a context variable:
- Set contextVar to specify the variable name
- Use setContextVariable() to store your handler instance
Using an environment variable:
- Set both envVar and handlerClass
- The handler will be instantiated when the env var is set to "true".

registerConfigureHook(config: ConfigureHook)

Parameters

Name	Type	Description
`config`*	`ConfigureHook`	Configuration object for the hook

Example

// Method 1: Using context variable
import {
  registerConfigureHook,
  setContextVariable
} from "@langchain/core/context";

const tracer = new MyCallbackHandler();
registerConfigureHook({
  contextVar: "my_tracer",
});
setContextVariable("my_tracer", tracer);

// ...run code here

// Method 2: Using environment variable
registerConfigureHook({
  handlerClass: MyCallbackHandler,
  envVar: "MY_TRACER_ENABLED",
});
process.env.MY_TRACER_ENABLED = "true";

// ...run code here

View source on GitHub

registerConfigureHook

Parameters

Example

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registerConfigureHook

Parameters

Example