On 17/03/2017 21:25, Daniel Stoner wrote:
What I wanted to do - was nest paths inside of each other thinking:
path("v1") {
path("orders") {whatever}
path("customers") {whatever}
}
Yes, exactly so.
In practice it appears that it works more as though each nested path does
not operate on the remaining unmatched path - but actually the whole url.
In a sense the above code is saying match paths that both look like: START
- /v1/ - END AND START - /orders/ - END. Obviously an impossible situation.
I believe that's why you need to use "~" or concat, so the alternatives
are tried in order.
So what we do is simply enumerate the paths we want to match for (rather
than nest them) and use PathMatcher DSL to enable us to avoid any real
overhead to the code for this. In the end it's just as readable (If not a
little bit more so since your enumerating explicitly your matching
possibilities rather than nesting them).
The problem is I have hundreds of paths to match, listing each
individual path in full in a linear fashion is just unworkable, I need
to use a tree.
One practices we found that worked - do the splitting by HTTP method
(GET/POST/PUT) down at the lowest level. Often you have a URL like
/v1/orders that accepts GET, PUT and POST and then you can nest all 3
options under one path matcher.
Yes, that's what I've done.
I really believe the current behaviour is the wrong choice, although
I've found hints in the documentation that it is deliberate - I have no
idea why it was considered to be a good design, if indeed it was.
I'm trying to figure out how to write my own implementation of
Segment("foo") to allow complete matching of a path segment, but it's
not easy as the DSL implementation is pretty "dense" code.
--
Alan Burlison
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