status

The Status type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs.

IMPORTANT: Backward compatibility notes:

To ensure any pair of senders and receivers continues to correctly signal and interpret erroneous situations, the senders and receivers MUST follow these rules:

1. Old senders and receivers that are not aware of code field will continue using the deprecated_code field to signal and interpret erroneous situation.

2. New senders, which are aware of the code field MUST set both the deprecated_code and code fields according to the following rules:

   if code==STATUS_CODE_UNSET then deprecated_code MUST be set to DEPRECATED_STATUS_CODE_OK.

   if code==STATUS_CODE_OK then deprecated_code MUST be set to DEPRECATED_STATUS_CODE_OK.

   if code==STATUS_CODE_ERROR then deprecated_code MUST be set to DEPRECATED_STATUS_CODE_UNKNOWN_ERROR.

These rules allow old receivers to correctly interpret data received from new senders.

3. New receivers MUST look at both the code and deprecated_code fields in order to interpret the overall status:

   If code==STATUS_CODE_UNSET then the value of deprecated_code is the carrier of the overall status according to these rules:

   if deprecated_code==DEPRECATED_STATUS_CODE_OK then the receiver MUST interpret
   the overall status to be STATUS_CODE_UNSET.
   
   if deprecated_code!=DEPRECATED_STATUS_CODE_OK then the receiver MUST interpret
   the overall status to be STATUS_CODE_ERROR.

   If code!=STATUS_CODE_UNSET then the value of deprecated_code MUST be ignored, the code field is the sole carrier of the status.

These rules allow new receivers to correctly interpret data received from old senders.

Functions

ok()

Returns a success status code

error(message)

Returns an error status code, with user defined error messsage