clear server state entirely before starting to import initial load;

particularly registering the replica service for tracked race additions in order to auto-link them
to leaderboards causes trouble if the server state is not cleared before. Replicated tracked races may
then get auto-linked to old leaderboards and regattas in the server that happen to point to races with
equal RaceIdentifiers.

Also, it is important to become tolerant against a non-existing default leaderboard which doesn't exist
yet when tracked races are imported. The default leaderboard will be replicated together with other
leaderboards.

java/com.sap.sailing.domain/META-INF/MANIFEST.MF

@@ -14,7 +14,8 @@ Export-Package: com.sap.sailing.domain.base,
  com.sap.sailing.domain.leaderboard.impl,
  com.sap.sailing.domain.tracking,
  com.sap.sailing.domain.tracking.impl,
- com.sap.sailing.util
+ com.sap.sailing.util,
+ com.sap.sailing.util.impl;x-friends:="com.sap.sailing.server.replication"
 Bundle-ActivationPolicy: lazy
 Require-Bundle: com.googlecode.java-diff-utils;bundle-version="1.3.0",
  com.sap.sailing.domain.common,

java/com.sap.sailing.server.replication/src/com/sap/sailing/server/replication/impl/ReplicationServlet.java

@@ -5,6 +5,7 @@ import java.io.ObjectOutputStream;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.Arrays;
+import java.util.logging.Logger;
 
 import javax.jms.JMSException;
 import javax.servlet.ServletException;
@@ -27,6 +28,8 @@ import com.sap.sailing.server.replication.ReplicaDescriptor;
  * 
  */
 public class ReplicationServlet extends Servlet {
+    private static final Logger logger = Logger.getLogger(ReplicationServlet.class.getName());
+    
     private static final long serialVersionUID = 4835516998934433846L;
     
     public enum Action { REGISTER, INITIAL_LOAD }
@@ -65,7 +68,14 @@ public class ReplicationServlet extends Servlet {
             break;
         case INITIAL_LOAD:
             ObjectOutputStream oos = new ObjectOutputStream(resp.getOutputStream());
-            getService().serializeForInitialReplication(oos);
+            try {
+                getService().serializeForInitialReplication(oos);
+            } catch (Exception e) {
+                logger.info("Error trying to serialize initial load for replication: "+e.getMessage());
+                logger.throwing(ReplicationServlet.class.getName(), "doGet", e);
+                resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+                e.printStackTrace(resp.getWriter());
+            }
             break;
         default:
             resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Action " + action + " not understood. Must be one of "

java/com.sap.sailing.server/src/com/sap/sailing/server/impl/RacingEventServiceImpl.java

@@ -776,8 +776,10 @@ public class RacingEventServiceImpl implements RacingEventService, RegattaListen
             replicate(op);
             linkRaceToConfiguredLeaderboardColumns(trackedRace);
             final FlexibleLeaderboard defaultLeaderboard = (FlexibleLeaderboard) leaderboardsByName.get(DefaultLeaderboardName.DEFAULT_LEADERBOARD_NAME);
-            defaultLeaderboard.addRace(trackedRace,
-                    trackedRace.getRace().getName(), /* medalRace */false, defaultLeaderboard.getFleet(null));
+            if (defaultLeaderboard != null) {
+                defaultLeaderboard.addRace(trackedRace, trackedRace.getRace().getName(), /* medalRace */false,
+                        defaultLeaderboard.getFleet(null));
+            }
             TrackedRaceReplicator trackedRaceReplicator = new TrackedRaceReplicator(trackedRace);
             trackedRaceReplicators.put(trackedRace, trackedRaceReplicator);
             trackedRace.addListener(trackedRaceReplicator);
@@ -1362,16 +1364,18 @@ public class RacingEventServiceImpl implements RacingEventService, RegattaListen
             // (com.sap.sailing.server) can see
             Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
             regattasByName.clear();
-            regattasByName.putAll((Map<String, Regatta>) ois.readObject());
             regattasObservedForDefaultLeaderboard.clear();
+            regattaTrackingCache.clear();
+            leaderboardGroupsByName.clear();
+            leaderboardsByName.clear();
+            regattasByName.putAll((Map<String, Regatta>) ois.readObject());
+            // it is important that the leaderboards and tracked regattas are cleared before auto-linking to
+            // old leaderboards takes place which then don't match the new ones
             for (DynamicTrackedRegatta trackedRegattaToObserve : (Set<DynamicTrackedRegatta>) ois.readObject()) {
                 ensureRegattaIsObservedForDefaultLeaderboardAndAutoLeaderboardLinking(trackedRegattaToObserve);
             }
-            regattaTrackingCache.clear();
             regattaTrackingCache.putAll((Map<Regatta, DynamicTrackedRegatta>) ois.readObject());
-            leaderboardGroupsByName.clear();
             leaderboardGroupsByName.putAll((Map<String, LeaderboardGroup>) ois.readObject());
-            leaderboardsByName.clear();
             leaderboardsByName.putAll((Map<String, Leaderboard>) ois.readObject());
             logger.info("Done with initial replication on "+this);
         } finally {