Make service monitors aware of infra applications in duper model.

 - Notify monitors of infrastructure application activation. Live-flipping the
   content of the duper model is non-trivial and has been removed.
 - Split out DuperModel as a simple mutable and thread-unsafe container of the
   applications in the duper model, that also handles calls listeners on
   changes. The previous DuperModel has been renamed to DuperModelManager.
 - Replace SuperModelProvider::snapshot method (fast but difficult to use
   right) with registerListener.
 - Shorten the fully qualified package names by 1-2 levels for mosts classes.

Next steps:
 - Make HA query the real orchestrator
 - Start experimenting with health monitoring of infra apps

1 files changed, 7 insertions, 6 deletions

diff --git a/config-model-api/src/main/java/com/yahoo/config/model/api/SuperModelProvider.java b/config-model-api/src/main/java/com/yahoo/config/model/api/SuperModelProvider.java
index ac578b98441..b33902cbfb5 100644
--- a/config-model-api/src/main/java/com/yahoo/config/model/api/SuperModelProvider.java
+++ b/config-model-api/src/main/java/com/yahoo/config/model/api/SuperModelProvider.java
@@ -2,13 +2,14 @@
 package com.yahoo.config.model.api;
 
 public interface SuperModelProvider {
-    SuperModel getSuperModel();
-
     /**
-     * Returns the current SuperModel. All changes to the SuperModel
-     * following that snapshot will be published to the listener. Warning: The listener
-     * methods may have been invoked before (or concurrently with) this method returning.
+     * Synchronously call {@link SuperModelListener#applicationActivated(SuperModel, ApplicationInfo)
+     * listener.applicationActivated()} on all active applications, and register the listener for future changes
+     * to the super model.
+     *
+     * WARNING: The listener may be called asynchronously before the method returns.
      */
-    SuperModel snapshot(SuperModelListener listener);
+    void registerListener(SuperModelListener listener);
 
+    SuperModel getSuperModel();
 }