Using invocation context

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

Context is metadata associated with each invocation. If the handler function accepts a context argument then it will automatically receive at runtime a named list consisting of these values along with the arguments in the body (if any). For example, a function such as my_func(x, context) will receive the context argument automatically. The context argument must be named (... will not work).

The following context is made available as a named list:

Event class-specific context

This section concerns future functionality for the lambdr package. It is not yet implemented.

A particular event class (determined by invocation method) can implement an extract_context method. This could be used to say, include details about the HTTP request if an invocation is coming via an API Gateway.

In all cases the context should be a named list. The new context is appended to the default values listed above.



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lambdr documentation built on Aug. 15, 2022, 1:05 a.m.