zeroflag commented on code in PR #832:
URL: https://github.com/apache/knox/pull/832#discussion_r1453597300


##########
gateway-spi/src/main/java/org/apache/knox/gateway/deploy/ServiceDeploymentContributorBase.java:
##########
@@ -82,7 +83,9 @@ protected void addAuthenticationFilter( DeploymentContext 
context, Service servi
   protected void addIdentityAssertionFilter( DeploymentContext context, 
Service service, ResourceDescriptor resource) {
     if( topologyContainsProviderType( context, "authentication" ) ||
         topologyContainsProviderType( context, "federation"  ) ) {
-      context.contributeFilter( service, resource, "identity-assertion", null, 
null );
+      Topology topology = context.getTopology();
+      Provider activeProvider = topology.getProvider("identity-assertion", 
null);

Review Comment:
   No, one line above there is a `topologyContainsProviderType` which does a 
`context.getTopology().getProviders()`. If it was null it would fail even 
earlier.



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