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Redis distributed cache: add HybridCache usage signal #59543
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                    captainsafia
  
              
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                    Dec 18, 2024 
                  
              
              
            
            
              
                    DeagleGross
  
              
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      Labels
      
    area-middleware
  Includes: URL rewrite, redirect, response cache/compression, session, and other general middlewares 
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We already use
"DC"and"OC"markers on RESP connections to provide a non-intrusive signal that Distributed Cache and Output Cache are being used; sinceHybridCacheis a feature on top ofIDistributedCache, here we add an additional"HC"token to indicate that a RESP connection is being used forHybridCache.We do this by using
IServiceProvider(changing theinternal RedisCacheImpl(...)constructors) to detectHybridCacheas a service. We don't need it to be the officialHybridCachespecifically (as in.AddHybridCache()) - just that aHybridCacheexists. There are no public API or dependency changes required.Note: we will also want to backport this