Continuing the placeholder registration question in 21468.
Is it possible to register new “global placeholders” (placeholders that are always available, like the {env.*}, {system.*}, {time.*} placeholders)? Or is it possible to extend the existing global ones, like {system.*}? If yes, example code snippets would be appreciated!
No, it’s not.
Then is it possible to register placeholders in active health checks?
What’s your goal exactly?
Quite simple, in fact. Generating a rolling ID available within a site, which could be used in request handling and active health checking.
What do you mean by “rolling ID”? Do you mean an increasing counter? Does it have to be a counter?
You can use {http.request.uuid} in regular request handlers (but not active health checks because it’s outside of regular requests).
Why do you need this?
Not a counter. The rolling ID has to be persistent, and updated at a certain interval. This will rule out any single-use ID.
As of why it’s needed, let’s say “reproducible sticky-hash load balancing”.
I’m not sure I understand. You’re explaining in very vague terms so we can’t have much of a useful conversation.
Anyway, like I wrote here:
Before we can commit to looking into making global placeholders pluggable, we need to figure out how we want {file.*} to be implemented because it’ll determine how that API will look.
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