[PROTON-1949] no message header if priority == default

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Assignee: Unassigned
• Reporter: Michael Goulish
• Created: 04/Oct/18 13:42
• Updated: 05/Oct/18 17:34
• Resolved: 05/Oct/18 17:34

Description

Proton does not send a message header if there would be nothing in it but the priority field, and if the priority was set to the default value (4). 

At the router level, we are allowing the user to set priorities on addresses. Those priorities will be given to any message sent to that address if the message otherwise had no priority set.

So - we need to be able to distinguish between messages that were assigned the default priority, and messages in which the priority was left undefined.

We would like proton to send the priority field in the message header if the user sets any priority. Then we will be able to interpret no header, or no priority field in the header as "no priority was assigned".