Cache management of micro-lc/orchestrator

[giovanni-motterle-mia-care]

What product are you having troubles with?

Microfrontend Composer

What Console version are you using?

v13.1.1

Description

Hi, I noted that when I'm navigating through Backoffice pages, orchestrator doesn't retrieve the page configuration again if since the last browser refresh I already visited that page.
In my use case configuration pages can change at runtime based on some "platform variables" and I was wondering if there was a way to disable this "internal" cache of orchestrator.

Actual Outcome

No response

Expected Outcome

No response

[epessina]

Hi @giovanni-motterle-mia-care , there is no internal cache in micro-lc or middleware.

To avoid caching of configuration files you need to add the appropriate rules on your gateway to append the Cache-Control header of the requests (specifically with value no-cache to disable cache entirely).

[giovanni-motterle-mia-care]

Hi, we configured the cache-control header but, as you can see in the video, microlc doesn't even try to fetch the configuration via http the second time i go to that page

Cache.micro-lc.mp4

[epessina]

Hi @giovanni-motterle-mia-care . Sorry, I didn't realize that was your problem. micro-lc (or, better yet, its internal orchestrator) does not re-fetch configurations of already visited pages.

However, since it does make sense in some cases to have "fresh" configurations at each navigation, we can plan to support this feature

[giovanni-motterle-mia-care]

Hi, awesome, thanks.

[epessina]

Hi @giovanni-motterle-mia-care , we just released version 2.4.3 of micro-lc addressing the configuration re-fetching issue.

Starting from this version, when configuring applications of type compose you can specify a new property options that may have a property fetchConfigOnMount. If this flag set to true, micro-lc will re-fetch the application configuration each time you visit it.

For example

{
  "applications": {
    "refresh": {
       "integrationMode": "compose",
       "route": "./refresh",
       "config": "/micro-lc-configurations/refresh.config.json",
       "options": {
         "fetchConfigOnMount": true
       }
    }
  }
}

Please note that you cannot set this property via the application modal in the Configurator for now. You will need to manually set it in the advanced section.

Let me know if this implementation covers your use case

[giovanni-motterle-mia-care]

@epessina, awesome, thanks. I already configured it without issues.