pzampino commented on code in PR #929:
URL: https://github.com/apache/knox/pull/929#discussion_r1725038551


##########
gateway-server/src/main/java/org/apache/knox/gateway/GatewayServer.java:
##########
@@ -962,10 +985,32 @@ private void processApplicationPathAliases(File warDir, 
Topology topology) {
     });
   }
 
+  private void addInactiveTopology(final String topologyName) {
+    synchronized (inactiveTopologies) {
+      inactiveTopologies.add(topologyName);
+    }
+  }
+
+  private void removeInactiveTopology(final String topologyName) {
+    synchronized (inactiveTopologies) {
+      inactiveTopologies.remove(topologyName);
+    }
+  }
+
+  private boolean isInactiveTopology(final String topologyName) {
+    boolean result = false;
+    synchronized (inactiveTopologies) {
+      result = inactiveTopologies.contains(topologyName);
+    }
+    return result;
+  }
+
   private synchronized void internalDeactivateTopology( Topology topology ) {

Review Comment:
   Concerning the point about initial deployments, we could/should immediately 
mark topologies as inactive on deployment initiation, and then mark them as 
active upon completion. I believe this would further minimize the potential for 
clients to receive a 404 response for a "deployed" topology.



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