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:
aws_request_id- The identifier of the invocation request
invoked_function_arn– The Amazon Resource Name (ARN) that’s used to invoke the function. Indicates if the invoker specified a version number or alias.
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.