orpiske commented on PR #7714:
URL: https://github.com/apache/camel/pull/7714#issuecomment-1145057417

   > How are the adapters discovered? Some kind of classpath discovery? If so 
we have the existing FactoryFinder that we use for everything in Camel ala 
components, languages, health checks, and other things.
   > 
   > The manifest files are stored in META-INF/services/org/apache/camel/...
   > 
   > I noticed that in this PR that it may not be the location for this?
   
   It reads the properties defined in the `adapter.properties` to find the 
adapter to load. The bulk of work was done on #7688 and now I am updating the 
supported components to this behavior. 
   
   In terms of code, the resolution is done in the DefaultRoute when gathering 
the root services [1] and then the helper searches [2] both on the classpath as 
well as the registry to resolve the strategy and the cache. 
   
   Thanks for mentioning the `FactoryFinder`. This is still a WIP and there's 
more to be done, including CAMEL-18152 and CAMEL-18128, which can benefit from 
this. 
   
   Relevant links:
   1. 
https://github.com/apache/camel/blob/main/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultRoute.java#L646-L650
   2. 
https://github.com/apache/camel/blob/main/core/camel-support/src/main/java/org/apache/camel/support/resume/AdapterHelper.java#L42-L70
   
   


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