[FSSDK-11168] review update

Author: junaed-optimizely

OptimizelySDK.NetStandard20/OptimizelySDK.NetStandard20.csproj

@@ -187,6 +187,12 @@
     <Compile Include="..\OptimizelySDK\Cmab\DefaultCmabClient.cs">
       <Link>Cmab\DefaultCmabClient.cs</Link>
     </Compile>
+    <Compile Include="..\OptimizelySDK\Cmab\ICmabService.cs">
+      <Link>Cmab\ICmabService.cs</Link>
+    </Compile>
+    <Compile Include="..\OptimizelySDK\Cmab\DefaultCmabService.cs">
+      <Link>Cmab\DefaultCmabService.cs</Link>
+    </Compile>
     <Compile Include="..\OptimizelySDK\Cmab\CmabRetryConfig.cs">
       <Link>Cmab\CmabRetryConfig.cs</Link>
     </Compile>

OptimizelySDK/Cmab/DefaultCmabService.cs

@@ -112,18 +112,21 @@ public CmabDecision GetDecision(ProjectConfig projectConfig,
 
             if (optionSet.Contains(OptimizelyDecideOption.IGNORE_CMAB_CACHE))
             {
+                _logger.Log(LogLevel.DEBUG, "Ignoring CMAB cache.");
                 return FetchDecision(ruleId, userContext.GetUserId(), filteredAttributes);
             }
 
             if (optionSet.Contains(OptimizelyDecideOption.RESET_CMAB_CACHE))
             {
+                _logger.Log(LogLevel.DEBUG, "Resetting CMAB cache.");
                 _cmabCache.Reset();
             }
 
             var cacheKey = GetCacheKey(userContext.GetUserId(), ruleId);
 
             if (optionSet.Contains(OptimizelyDecideOption.INVALIDATE_USER_CMAB_CACHE))
             {
+                _logger.Log(LogLevel.DEBUG, "Invalidating user CMAB cache.");
                 _cmabCache.Remove(cacheKey);
             }
 
@@ -136,8 +139,11 @@ public CmabDecision GetDecision(ProjectConfig projectConfig,
                 {
                     return new CmabDecision(cachedValue.VariationId, cachedValue.CmabUuid);
                 }
+                else
+                {
+                    _cmabCache.Remove(cacheKey);
+                }
 
-                _cmabCache.Remove(cacheKey);
             }
 
             var cmabDecision = FetchDecision(ruleId, userContext.GetUserId(), filteredAttributes);