log

SpecialNodes log

parameter ports:
Name	Type	Description	Optional
caption0	string	caption to be added to output	yes
caption1	string	caption to be added to output	yes
		…
caption N-1	tring	caption to be added to output	yes

input ports:
Name	Type	Description	Optional
default	?1	value to output when key is absent from the map	yes

output ports:
Name	Type	Description	Optional
ack	?0	data of JSON-compatible type	no

Prints the location (circuit name and node key) of the log node itself; the caption parameters; and the input data in external form, to stderr. In the AWS execution environment, messages to stderr are captured by the logging mechanisms, e.g., CloudWatch. The fields of the output messages are colon-separated.

log accepts Transparency types that can be printed, namely strings numbers and symbols, and renders them using ordinary Transparency output operations. logJSON and logOneLiner take JSON-compatible types, which include boolean, strings, symbols, numbers, tuples, maps, lists, vectors and sets over JSON-compatible types, and prints them in standard JSON external format. logJSON indents its output and logOneLiner does not. Ordinarily the latter two routines are to be preferred, but sometimes one wants the simpler Transparency rendering of strings, for example.