faastjs > FaastError

FaastError class

FaastError is a subclass of VError (https://github.com/joyent/node-verror). that is thrown by faast.js APIs and cloud function invocations.

Signature:

export declare class FaastError extends VError 

Extends: VError

Remarks

FaastError is a subclass of VError, which provides an API for nested error handling. The main API is the same as the standard Error class, namely the err.message, err.name, and err.stack properties.

Several static methods on FaastError are inherited from VError:

FaastError.fullStack(err) - property provides a more detailed stack trace that include stack traces of causes in the causal chain.

FaastError.info(err) - returns an object with fields functionName, args, and logUrl. The logUrl property is a URL pointing to the logs for a specific invocation that caused the error.logUrl will be surrounded by whitespace on both sides to ease parsing as a URL by IDEs.

FaastError.hasCauseWithName(err, cause) - returns true if the FaastError or any of its causes includes an error with the given name, otherwise false. All of the available names are in the enum FaastErrorNames. For example, to detect if a FaastError was caused by a cloud function timeout:

  FaastError.hasCauseWithName(err, FaastErrorNames.ETIMEOUT)

FaastError.findCauseByName(err, cause) - like FaastError.hasCauseWithName() except it returns the Error in the causal chain with the given name instead of a boolean, otherwise null.