Integrating library that uses RequestMappingHandlerMapping

[kenpb]

Hello,

I'm currently interested in integrating htmx-spring-boot; it's a set of helpers to work with htmx and avoid some boilerplate, the library provides a custom class that extends RequestMappingHandlerMapping for intercepting htmx specific endpoints.

If I add the dependencies and just run my example repo I would get a ClassCastException, I've tried adding the property plugin.pluginFirstClasses=HtmxRequestMappingHandlerMapping and plugin.pluginFirstClasses=io.github.wimdeblauwe.htmx.spring.boot.mvc.HtmxRequestMappingHandlerMapping to the config without any luck, maybe I didn't understand the right way to use this?

So my question is, if I were to integrate this library permanently without relaying in the config for it, how should proceed? Should I create a custom WebMvcRegistrations bean to override the one in SbpWebMvcPatchAutoConfiguration and provide an extended PluginRequestMappingHandlerMapping class that also to included the htmx handling? Or what would be a right way of handling this?

Salutations and thanks.

[hank-cp]

Unfortunately, both htmx-spring-boot and sbp extend RequestMappingHandlerMapping to build underlying supports. So basically them are just not able to live together.

[kenpb]

Hi @hank-cp , thanks for the reply and indeed, but thankfully, since the sbp and htmx override different parts of the RequestMappingHandlerMapping I did manage (in a hacky way) to get them to work together.

I created a custom WebMvcRegistrations that I registered before SbpWebMvcPatchAutoConfiguration and marked as primary, this class added a custom RequestMappingHandlerMapping that extended the PluginRequestMappingHandlerMapping and added the necessary RequestConditions to get htmx-spring-boot to work, it's less than ideal and I haven't tested anything besides the regular @HxRequest but if anyone is interested in doing something like that this code may be of help

WDYT?

[hank-cp]

Your solution looks feasible. Could you make a PR for it please? It's better that you could also provide webflux support.

Thx in advance:)

[kenpb]

Sure thing, just a little short on time ATM so I it may take a while before I can submit the PR