compileable but untested refactored version of RaceMap.timeChanged, working towards a solution for bug3378

Change-Id: Idc67121b9c1931e66453def87da8243250b9c9d2

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/actions/AbstractGetMapRelatedDataAction.java

@@ -0,0 +1,47 @@
+package com.sap.sailing.gwt.ui.actions;
+
+import java.util.Date;
+import java.util.Map;
+
+import com.sap.sailing.domain.common.RegattaAndRaceIdentifier;
+import com.sap.sailing.domain.common.dto.CompetitorDTO;
+import com.sap.sailing.gwt.ui.client.SailingServiceAsync;
+import com.sap.sse.gwt.client.async.AsyncAction;
+
+public abstract class AbstractGetMapRelatedDataAction<T> implements AsyncAction<T> {
+    private final SailingServiceAsync sailingService;
+    private final RegattaAndRaceIdentifier raceIdentifier;
+    private final Map<CompetitorDTO, Date> from;
+    private final Map<CompetitorDTO, Date> to;
+    private final boolean extrapolate;
+    
+    public AbstractGetMapRelatedDataAction(SailingServiceAsync sailingService,
+            RegattaAndRaceIdentifier raceIdentifier, Map<CompetitorDTO, Date> from,
+            Map<CompetitorDTO, Date> to, boolean extrapolate) {
+        this.sailingService = sailingService;
+        this.raceIdentifier = raceIdentifier;
+        this.from = from;
+        this.to = to;
+        this.extrapolate = extrapolate;
+    }
+
+    protected SailingServiceAsync getSailingService() {
+        return sailingService;
+    }
+
+    protected RegattaAndRaceIdentifier getRaceIdentifier() {
+        return raceIdentifier;
+    }
+
+    protected Map<CompetitorDTO, Date> getFrom() {
+        return from;
+    }
+
+    protected Map<CompetitorDTO, Date> getTo() {
+        return to;
+    }
+
+    protected boolean isExtrapolate() {
+        return extrapolate;
+    }
+}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/actions/GetBoatPositionsAction.java

@@ -0,0 +1,43 @@
+package com.sap.sailing.gwt.ui.actions;
+
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.google.gwt.user.client.rpc.AsyncCallback;
+import com.sap.sailing.domain.common.RegattaAndRaceIdentifier;
+import com.sap.sailing.domain.common.dto.CompetitorDTO;
+import com.sap.sailing.gwt.ui.client.SailingServiceAsync;
+import com.sap.sailing.gwt.ui.shared.CompactBoatPositionsDTO;
+
+public class GetBoatPositionsAction extends AbstractGetMapRelatedDataAction<CompactBoatPositionsDTO> {
+    public GetBoatPositionsAction(SailingServiceAsync sailingService,
+            RegattaAndRaceIdentifier raceIdentifier, Map<CompetitorDTO, Date> from,
+            Map<CompetitorDTO, Date> to, boolean extrapolate) {
+        super(sailingService, raceIdentifier, from, to, extrapolate);
+    }
+    
+    @Override
+    public void execute(final AsyncCallback<CompactBoatPositionsDTO> callback) {
+        Map<String, Date> fromByCompetitorIdAsString = new HashMap<String, Date>();
+        for (Map.Entry<CompetitorDTO, Date> fromEntry : getFrom().entrySet()) {
+            fromByCompetitorIdAsString.put(fromEntry.getKey().getIdAsString(), fromEntry.getValue());
+        }
+        Map<String, Date> toByCompetitorIdAsString = new HashMap<String, Date>();
+        for (Map.Entry<CompetitorDTO, Date> toEntry : getTo().entrySet()) {
+            toByCompetitorIdAsString.put(toEntry.getKey().getIdAsString(), toEntry.getValue());
+        }
+        getSailingService().getBoatPositions(getRaceIdentifier(), fromByCompetitorIdAsString, toByCompetitorIdAsString,
+                isExtrapolate(), new AsyncCallback<CompactBoatPositionsDTO>() {
+                    @Override
+                    public void onFailure(Throwable caught) {
+                        callback.onFailure(caught);
+                    }
+
+                    @Override
+                    public void onSuccess(CompactBoatPositionsDTO result) {
+                        callback.onSuccess(result);
+                    }
+                });
+    }
+}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/actions/GetRaceMapDataAction.java

@@ -11,43 +11,33 @@ import com.sap.sailing.domain.common.dto.CompetitorDTO;
 import com.sap.sailing.gwt.ui.client.SailingServiceAsync;
 import com.sap.sailing.gwt.ui.shared.CompactRaceMapDataDTO;
 import com.sap.sailing.gwt.ui.shared.RaceMapDataDTO;
-import com.sap.sse.gwt.client.async.AsyncAction;
 
-public class GetRaceMapDataAction implements AsyncAction<RaceMapDataDTO> {
-    private final SailingServiceAsync sailingService;
-    private final Iterable<CompetitorDTO> allCompetitors;
-    private final RegattaAndRaceIdentifier raceIdentifier;
-    private final Map<CompetitorDTO, Date> from;
-    private final Map<CompetitorDTO, Date> to;
-    private final boolean extrapolate;
+public class GetRaceMapDataAction extends AbstractGetMapRelatedDataAction<RaceMapDataDTO> {
+    private final Map<String, CompetitorDTO> competitorsByIdAsString;
     private final Date date;
     private final LegIdentifier simulationLegIdentifier;
     
-    public GetRaceMapDataAction(SailingServiceAsync sailingService, Iterable<CompetitorDTO> allCompetitors,
+    public GetRaceMapDataAction(SailingServiceAsync sailingService, Map<String, CompetitorDTO> competitorsByIdAsString,
             RegattaAndRaceIdentifier raceIdentifier, Date date, Map<CompetitorDTO, Date> from,
             Map<CompetitorDTO, Date> to, boolean extrapolate, LegIdentifier simulationLegIdentifier) {
-        this.allCompetitors = allCompetitors;
-        this.sailingService = sailingService;
-        this.raceIdentifier = raceIdentifier;
+        super(sailingService, raceIdentifier, from, to, extrapolate);
+        this.competitorsByIdAsString = competitorsByIdAsString;
         this.date = date;
-        this.from = from;
-        this.to = to;
-        this.extrapolate = extrapolate;
         this.simulationLegIdentifier = simulationLegIdentifier;
     }
     
     @Override
     public void execute(final AsyncCallback<RaceMapDataDTO> callback) {
         Map<String, Date> fromByCompetitorIdAsString = new HashMap<String, Date>();
-        for (Map.Entry<CompetitorDTO, Date> fromEntry : from.entrySet()) {
+        for (Map.Entry<CompetitorDTO, Date> fromEntry : getFrom().entrySet()) {
             fromByCompetitorIdAsString.put(fromEntry.getKey().getIdAsString(), fromEntry.getValue());
         }
         Map<String, Date> toByCompetitorIdAsString = new HashMap<String, Date>();
-        for (Map.Entry<CompetitorDTO, Date> toEntry : to.entrySet()) {
+        for (Map.Entry<CompetitorDTO, Date> toEntry : getTo().entrySet()) {
             toByCompetitorIdAsString.put(toEntry.getKey().getIdAsString(), toEntry.getValue());
         }
-        sailingService.getRaceMapData(raceIdentifier, date, fromByCompetitorIdAsString, toByCompetitorIdAsString,
-                extrapolate, simulationLegIdentifier, new AsyncCallback<CompactRaceMapDataDTO>() {
+        getSailingService().getRaceMapData(getRaceIdentifier(), date, fromByCompetitorIdAsString, toByCompetitorIdAsString,
+                isExtrapolate(), simulationLegIdentifier, new AsyncCallback<CompactRaceMapDataDTO>() {
                     @Override
                     public void onFailure(Throwable caught) {
                         callback.onFailure(caught);
@@ -55,7 +45,7 @@ public class GetRaceMapDataAction implements AsyncAction<RaceMapDataDTO> {
 
                     @Override
                     public void onSuccess(CompactRaceMapDataDTO result) {
-                        callback.onSuccess(result.getRaceMapDataDTO(allCompetitors));
+                        callback.onSuccess(result.getRaceMapDataDTO(competitorsByIdAsString));
                     }
                 });
     }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/SailingService.java

@@ -45,6 +45,7 @@ import com.sap.sailing.domain.racelogtracking.RaceLogTrackingAdapter;
 import com.sap.sailing.domain.tracking.TrackedRace;
 import com.sap.sailing.gwt.ui.adminconsole.RaceLogSetTrackingTimesDTO;
 import com.sap.sailing.gwt.ui.shared.BulkScoreCorrectionDTO;
+import com.sap.sailing.gwt.ui.shared.CompactBoatPositionsDTO;
 import com.sap.sailing.gwt.ui.shared.CompactRaceMapDataDTO;
 import com.sap.sailing.gwt.ui.shared.CompetitorsRaceDataDTO;
 import com.sap.sailing.gwt.ui.shared.ControlPointDTO;
@@ -158,6 +159,10 @@ public interface SailingService extends RemoteService, FileStorageManagementGwtS
     CompactRaceMapDataDTO getRaceMapData(RegattaAndRaceIdentifier raceIdentifier, Date date, Map<String, Date> fromPerCompetitorIdAsString,
             Map<String, Date> toPerCompetitorIdAsString, boolean extrapolate, LegIdentifier simulationLegIdentifier) throws NoWindException;
     
+    CompactBoatPositionsDTO getBoatPositions(RegattaAndRaceIdentifier raceIdentifier,
+            Map<String, Date> fromPerCompetitorIdAsString, Map<String, Date> toPerCompetitorIdAsString,
+            boolean extrapolate) throws NoWindException;
+
     RaceTimesInfoDTO getRaceTimesInfo(RegattaAndRaceIdentifier raceIdentifier);
     
     List<RaceTimesInfoDTO> getRaceTimesInfos(Collection<RegattaAndRaceIdentifier> raceIdentifiers);
@@ -612,4 +617,5 @@ public interface SailingService extends RemoteService, FileStorageManagementGwtS
      */
     Collection<CompetitorDTO> getCompetitorRegistrationsOnRaceLog(String leaderboardName, String raceColumnName,
             String fleetName);
+
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/SailingServiceAsync.java

@@ -37,6 +37,7 @@ import com.sap.sailing.domain.common.racelog.RacingProcedureType;
 import com.sap.sailing.domain.tracking.TrackedRace;
 import com.sap.sailing.gwt.ui.adminconsole.RaceLogSetTrackingTimesDTO;
 import com.sap.sailing.gwt.ui.shared.BulkScoreCorrectionDTO;
+import com.sap.sailing.gwt.ui.shared.CompactBoatPositionsDTO;
 import com.sap.sailing.gwt.ui.shared.CompactRaceMapDataDTO;
 import com.sap.sailing.gwt.ui.shared.CompetitorsRaceDataDTO;
 import com.sap.sailing.gwt.ui.shared.ControlPointDTO;
@@ -368,6 +369,10 @@ public interface SailingServiceAsync extends ServerInfoRetriever, FileStorageMan
             Map<String, Date> fromPerCompetitorIdAsString, Map<String, Date> toPerCompetitorIdAsString,
             boolean extrapolate, LegIdentifier simulationLegIdentifier, AsyncCallback<CompactRaceMapDataDTO> callback);
 
+    void getBoatPositions(RegattaAndRaceIdentifier raceIdentifier, Map<String, Date> fromPerCompetitorIdAsString,
+            Map<String, Date> toPerCompetitorIdAsString, boolean extrapolate,
+            AsyncCallback<CompactBoatPositionsDTO> callback);
+
     void getReplicaInfo(AsyncCallback<ReplicationStateDTO> callback);
 
     void startReplicatingFromMaster(String messagingHost, String masterName, String exchangeName, int servletPort,
@@ -753,4 +758,5 @@ public interface SailingServiceAsync extends ServerInfoRetriever, FileStorageMan
 
     void copyCourseToOtherRaceLogs(Triple<String, String, String> fromTriple,
             Set<Triple<String, String, String>> toTriples, AsyncCallback<Void> callback);
+
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/shared/racemap/RaceMap.java

@@ -83,6 +83,7 @@ import com.sap.sailing.domain.common.impl.DegreeBearingImpl;
 import com.sap.sailing.domain.common.impl.DegreePosition;
 import com.sap.sailing.domain.common.scalablevalue.impl.ScalableBearing;
 import com.sap.sailing.domain.common.scalablevalue.impl.ScalablePosition;
+import com.sap.sailing.gwt.ui.actions.GetBoatPositionsAction;
 import com.sap.sailing.gwt.ui.actions.GetPolarAction;
 import com.sap.sailing.gwt.ui.actions.GetRaceMapDataAction;
 import com.sap.sailing.gwt.ui.actions.GetWindInfoAction;
@@ -100,6 +101,7 @@ import com.sap.sailing.gwt.ui.client.shared.filter.QuickRankProvider;
 import com.sap.sailing.gwt.ui.client.shared.racemap.RaceMapHelpLinesSettings.HelpLineTypes;
 import com.sap.sailing.gwt.ui.client.shared.racemap.RaceMapZoomSettings.ZoomTypes;
 import com.sap.sailing.gwt.ui.common.client.DateAndTimeFormatterUtil;
+import com.sap.sailing.gwt.ui.shared.CompactBoatPositionsDTO;
 import com.sap.sailing.gwt.ui.shared.ControlPointDTO;
 import com.sap.sailing.gwt.ui.shared.CoursePositionsDTO;
 import com.sap.sailing.gwt.ui.shared.GPSFixDTO;
@@ -776,29 +778,8 @@ public class RaceMap extends AbsolutePanel implements TimeListener, CompetitorSe
                     final long transitionTimeInMillis = calculateTimeForPositionTransitionInMillis(newTime, oldTime);
                     final com.sap.sse.common.Util.Triple<Map<CompetitorDTO, Date>, Map<CompetitorDTO, Date>, Map<CompetitorDTO, Boolean>> fromAndToAndOverlap = 
                             fixesAndTails.computeFromAndTo(newTime, competitorsToShow, settings.getEffectiveTailLengthInMilliseconds());
-                    int requestID = ++boatPositionRequestIDCounter;
-                    // For those competitors for which the tails don't overlap (and therefore will be replaced by the new tail coming from the server)
-                    // we expect some potential delay in computing the full tail. Therefore, in those cases we fire two requests: one fetching only the
-                    // boat positions at newTime with zero tail length; and another one fetching everything else.
-                    // TODO bug3378: two calls that both request simulation and mark data wastes bandwidth and CPU; one of them should only use getBoatPositions to request missing pieces of tails; showBoatsOnMap must not remove canvases / tails if one of the two calls delivers only partial results
-                    final GetRaceMapDataAction getRaceMapDataForAllOverlappingAndTipsOfNonOverlapping = getRaceMapDataForAllOverlappingAndTipsOfNonOverlapping(fromAndToAndOverlap, race, newTime);
-                    final boolean updateMarksAndLinesExceptAdvantageLineInCallback;
-                    if (getRaceMapDataForAllOverlappingAndTipsOfNonOverlapping != null) {
-                        asyncActionsExecutor.execute(getRaceMapDataForAllOverlappingAndTipsOfNonOverlapping, GET_RACE_MAP_DATA_CATEGORY,
-                                getRaceMapDataCallback(newTime, transitionTimeInMillis, fromAndToAndOverlap.getC(), competitorsToShow, requestID,
-                                        /* updateMarksAndLinesExceptAdvantageLineInCallback */ true));
-                        updateMarksAndLinesExceptAdvantageLineInCallback = false; // don't do this again in the second call that mainly fetches 
-                        requestID = ++boatPositionRequestIDCounter;
-                    } else {
-                        updateMarksAndLinesExceptAdvantageLineInCallback = true;
-                    }
-                    // next, do the full thing; being the later call, if request throttling kicks in, the later call
-                    // supersedes the earlier call which may get dropped then
-                    GetRaceMapDataAction getRaceMapDataAction = new GetRaceMapDataAction(sailingService, competitorSelection.getAllCompetitors(), race,
-                            useNullAsTimePoint() ? null : newTime, fromAndToAndOverlap.getA(), fromAndToAndOverlap.getB(), /* extrapolate */ true, (settings.isShowSimulationOverlay() ? simulationOverlay.getLegIdentifier() : null));
-                    asyncActionsExecutor.execute(getRaceMapDataAction, GET_RACE_MAP_DATA_CATEGORY,
-                            getRaceMapDataCallback(newTime, transitionTimeInMillis, fromAndToAndOverlap.getC(), competitorsToShow, requestID,
-                                    updateMarksAndLinesExceptAdvantageLineInCallback));
+                    // Request map data update, possibly in two calls; see method details
+                    callGetRaceMapDataForAllOverlappingAndTipsOfNonOverlappingAndGetBoatPositionsForAllOthers(fromAndToAndOverlap, race, newTime, transitionTimeInMillis, competitorsToShow);
                     
                     // draw the wind into the map, get the combined wind
                     List<String> windSourceTypeNames = new ArrayList<String>();
@@ -851,63 +832,79 @@ public class RaceMap extends AbsolutePanel implements TimeListener, CompetitorSe
     }
 
     /**
-     * We assume that overlapping segments usually don't require a lot of loading time as the most typical case will be to update a longer
-     * tail with a few new fixes that were received since the last time tick. Non-overlapping position requests typically occur for the
-     * first request when no fix at all is known for the competitor yet, or when the user has radically moved the time slider to some
-     * other time such that given the current tail length setting the new tail segment does not overlap with the old one, requiring a full
-     * load of the entire tail data for that competitor.<p>
+     * Requests updates for map data and, when received, updates the map structures accordingly.
+     * <p>
      * 
-     * For the non-overlapping requests, this method creates a separate request which only loads boat positions, quick ranks, sidelines and
-     * mark positions for the zero-length interval at <code>newTime</code>, assuming that this will work fairly fast and in particular in
-     * O(1) time regardless of tail length, compared to fetching the entire tail for all competitors.
+     * The update can happen in one or two round trips. We assume that overlapping segments usually don't require a lot
+     * of loading time as the most typical case will be to update a longer tail with a few new fixes that were received
+     * since the last time tick. These supposedly fast requests are handled by a {@link GetRaceMapDataAction} which also
+     * requests updates for mark positions, sidelines and quick ranks. The same request also loads boat positions for
+     * the zero-length interval at <code>newTime</code> for the non-overlapping tails assuming that this will work
+     * fairly fast and in particular in O(1) time regardless of tail length, compared to fetching the entire tail for
+     * all competitors. This will at least provide quick feedback about those competitors' positions even if loading
+     * their entire tail may take a little longer. The {@link GetRaceMapDataAction} therefore is intended to be a rather
+     * quick call.
+     * <p>
      * 
-     * TODO bug 3378: This shall produce two calls: one complete GetRaceMapDataAction and another fetching of missing "long tails" which only needs to be carried out if the first call does not deliver everything requested by fromAndToAndOverlap
-     * The second call of GetRaceMapDataAction is this:
-     * 
-     *               GetRaceMapDataAction getRaceMapDataAction = new GetRaceMapDataAction(sailingService, competitorSelection.getAllCompetitors(), race,
-     *                       useNullAsTimePoint() ? null : newTime, fromAndToAndOverlap.getA(), fromAndToAndOverlap.getB(),
-     *                       true, // extrapolate
-     *                       (settings.isShowSimulationOverlay() ? simulationOverlay.getLegIdentifier() : null));
-     *               asyncActionsExecutor.execute(getRaceMapDataAction, GET_RACE_MAP_DATA_CATEGORY,
-     *                       getRaceMapDataCallback(newTime, transitionTimeInMillis, fromAndToAndOverlap.getC(), competitorsToShow, requestID,
-     *                               updateMarksAndLinesExceptAdvantageLineInCallback));
-     *
+     * Non-overlapping position requests typically occur for the first request when no fix at all is known for the
+     * competitor yet, or when the user has radically moved the time slider to some other time such that given the
+     * current tail length setting the new tail segment does not overlap with the old one, requiring a full load of the
+     * entire tail data for that competitor. For these non-overlapping requests, this method creates a
+     * {@link GetBoatPositionsAction} request loading the entire tail required, but not quick ranks, sidelines and mark
+     * positions. Updating the results of this call is done in {@link #updateBoatPositions(Date, long, Map, Iterable, Map)}.
+     * <p>
      */
-    private GetRaceMapDataAction getRaceMapDataForAllOverlappingAndTipsOfNonOverlapping(
-            Triple<Map<CompetitorDTO, Date>, Map<CompetitorDTO, Date>, Map<CompetitorDTO, Boolean>> fromAndToAndOverlap,
-            RegattaAndRaceIdentifier race, Date newTime) {
-        Map<CompetitorDTO, Date> fromTimes = new HashMap<>();
-        Map<CompetitorDTO, Date> toTimes = new HashMap<>();
+    private void callGetRaceMapDataForAllOverlappingAndTipsOfNonOverlappingAndGetBoatPositionsForAllOthers(
+            final Triple<Map<CompetitorDTO, Date>, Map<CompetitorDTO, Date>, Map<CompetitorDTO, Boolean>> fromAndToAndOverlap,
+            RegattaAndRaceIdentifier race, final Date newTime, final long transitionTimeInMillis, final Iterable<CompetitorDTO> competitorsToShow) {
+        final Map<CompetitorDTO, Date> fromTimesForQuickCall = new HashMap<>();
+        final Map<CompetitorDTO, Date> toTimesForQuickCall = new HashMap<>();
+        final Map<CompetitorDTO, Date> fromTimesForNonOverlappingTailsCall = new HashMap<>();
+        final Map<CompetitorDTO, Date> toTimesForNonOverlappingTailsCall = new HashMap<>();
         for (Map.Entry<CompetitorDTO, Boolean> e : fromAndToAndOverlap.getC().entrySet()) {
-            if (!e.getValue()) {
-                // no overlap; add competitor to request
-                fromTimes.put(e.getKey(), newTime);
-                toTimes.put(e.getKey(), newTime);
+            if (e.getValue()) {
+                // overlap: expect a quick response; add original request interval for the competitor
+                fromTimesForQuickCall.put(e.getKey(), fromAndToAndOverlap.getA().get(e.getKey()));
+                toTimesForQuickCall.put(e.getKey(), fromAndToAndOverlap.getB().get(e.getKey()));
+            } else {
+                // no overlap; add competitor to request with a zero-length interval asking only position at newTime, not the entire tail
+                fromTimesForQuickCall.put(e.getKey(), newTime);
+                toTimesForQuickCall.put(e.getKey(), newTime);
+                fromTimesForNonOverlappingTailsCall.put(e.getKey(), fromAndToAndOverlap.getA().get(e.getKey()));
+                toTimesForNonOverlappingTailsCall.put(e.getKey(), fromAndToAndOverlap.getB().get(e.getKey()));
             }
         }
-        final GetRaceMapDataAction result;
-        if (!fromTimes.isEmpty()) {
-            result = new GetRaceMapDataAction(sailingService, competitorSelection.getAllCompetitors(),
-                race, useNullAsTimePoint() ? null : newTime, fromTimes, toTimes, /* extrapolate */true, (settings.isShowSimulationOverlay() ? simulationOverlay.getLegIdentifier() : null));
-        } else {
-            result = null;
+        final Map<String, CompetitorDTO> competitorsByIdAsString = new HashMap<String, CompetitorDTO>();
+        for (CompetitorDTO competitor : competitorSelection.getAllCompetitors()) {
+            competitorsByIdAsString.put(competitor.getIdAsString(), competitor);
         }
-        return result;
+
+        asyncActionsExecutor.execute(new GetRaceMapDataAction(sailingService, competitorsByIdAsString,
+            race, useNullAsTimePoint() ? null : newTime, fromTimesForQuickCall, toTimesForQuickCall, /* extrapolate */true,
+                    (settings.isShowSimulationOverlay() ? simulationOverlay.getLegIdentifier() : null)), GET_RACE_MAP_DATA_CATEGORY,
+                getRaceMapDataCallback(newTime, transitionTimeInMillis, fromAndToAndOverlap.getC(), competitorsToShow, ++boatPositionRequestIDCounter));
+        // next, if necessary, do the full thing; the two calls have different action classes, so throttling should not drop one for the other
+        asyncActionsExecutor.execute(new GetBoatPositionsAction(sailingService, race, fromAndToAndOverlap.getA(), fromAndToAndOverlap.getB(),
+                /* extrapolate */ true), GET_RACE_MAP_DATA_CATEGORY,
+                new MarkedAsyncCallback<>(new AsyncCallback<CompactBoatPositionsDTO>() {
+                    @Override
+                    public void onFailure(Throwable t) {
+                        errorReporter.reportError("Error obtaining racemap data: " + t.getMessage(), true /*silentMode */);
+                    }
+                    
+                    @Override
+                    public void onSuccess(CompactBoatPositionsDTO result) {
+                        updateBoatPositions(newTime, transitionTimeInMillis, fromAndToAndOverlap.getC(), competitorsToShow, result.getBoatPositionsForCompetitors(competitorsByIdAsString));
+                    }
+                }));
     }
 
-    /**
-     * @param updateMarksAndLinesExceptAdvantageLineInCallback
-     *            when <code>true</code>, mark positions, mark-related lines such as start line and course middle lines,
-     *            three hull length circles and side lines are drawn; otherwise, only the boats, their info flags and
-     *            the advantage line will be updated.
-     */
     private AsyncCallback<RaceMapDataDTO> getRaceMapDataCallback(
             final Date newTime,
             final long transitionTimeInMillis,
             final Map<CompetitorDTO, Boolean> hasTailOverlapForCompetitor,
-            final Iterable<CompetitorDTO> competitorsToShow, final int requestID,
-            final boolean updateMarksAndLinesExceptAdvantageLineInCallback) {
-        return new AsyncCallback<RaceMapDataDTO>() {
+            final Iterable<CompetitorDTO> competitorsToShow, final int requestID) {
+        return new MarkedAsyncCallback<>(new AsyncCallback<RaceMapDataDTO>() {
             @Override
             public void onFailure(Throwable caught) {
                 errorReporter.reportError("Error obtaining racemap data: " + caught.getMessage(), true /*silentMode */);
@@ -916,28 +913,19 @@ public class RaceMap extends AbsolutePanel implements TimeListener, CompetitorSe
             @Override
             public void onSuccess(RaceMapDataDTO raceMapDataDTO) {
                 if (map != null && raceMapDataDTO != null) {
-                    quickRanks = raceMapDataDTO.quickRanks;
-                    competitorsInOrderOfWindwardDistanceTraveledWithOneBasedLegNumber =
-                            raceMapDataDTO.competitorsInOrderOfWindwardDistanceTraveledWithOneBasedLegNumber;
-                    if (showViewSimulation && settings.isShowSimulationOverlay()) {
-                        lastLegNumber = raceMapDataDTO.coursePositions.currentLegNumber;
-                    	simulationOverlay.updateLeg(Math.max(lastLegNumber,1), /* clearCanvas */ false, raceMapDataDTO.simulationResultVersion);
-                    }
                     // process response only if not received out of order
                     if (startedProcessingRequestID < requestID) {
                         startedProcessingRequestID = requestID;
+                        quickRanks = raceMapDataDTO.quickRanks;
+                        competitorsInOrderOfWindwardDistanceTraveledWithOneBasedLegNumber =
+                                raceMapDataDTO.competitorsInOrderOfWindwardDistanceTraveledWithOneBasedLegNumber;
+                        if (showViewSimulation && settings.isShowSimulationOverlay()) {
+                            lastLegNumber = raceMapDataDTO.coursePositions.currentLegNumber;
+                        	simulationOverlay.updateLeg(Math.max(lastLegNumber, 1), /* clearCanvas */ false, raceMapDataDTO.simulationResultVersion);
+                        }
                         // Do boat specific actions
                         Map<CompetitorDTO, List<GPSFixDTO>> boatData = raceMapDataDTO.boatPositions;
-                        fixesAndTails.updateFixes(boatData, hasTailOverlapForCompetitor, RaceMap.this, transitionTimeInMillis);
-                        Iterable<CompetitorDTO> competitorsForWhichNewFixesWereReveiced =
-                                fixesAndTails.updateFixes(boatData, hasTailOverlapForCompetitor, RaceMap.this, transitionTimeInMillis);
-                        if (!Util.isEmpty(competitorsForWhichNewFixesWereReveiced)) {
-                            showBoatsOnMap(newTime, transitionTimeInMillis, competitorsForWhichNewFixesWereReveiced);
-                            showCompetitorInfoOnMap(newTime, transitionTimeInMillis, competitorSelection.getSelectedFilteredCompetitors());
-                            // even though the wind data is retrieved by a separate call, re-draw the advantage line because it needs to
-                            // adjust to new boat positions
-                            showAdvantageLine(competitorsToShow, newTime, transitionTimeInMillis);
-                        }
+                        updateBoatPositions(newTime, transitionTimeInMillis, hasTailOverlapForCompetitor, competitorsToShow, boatData);
                         if (douglasMarkers != null) {
                             removeAllMarkDouglasPeuckerpoints();
                         }
@@ -948,13 +936,11 @@ public class RaceMap extends AbsolutePanel implements TimeListener, CompetitorSe
                         if (requiresCoordinateSystemUpdateWhenCoursePositionAndWindDirectionIsKnown) {
                             updateCoordinateSystemFromSettings();
                         }
-                        if (updateMarksAndLinesExceptAdvantageLineInCallback) {
-                            // Do mark specific actions
-                            showCourseMarksOnMap(raceMapDataDTO.coursePositions);
-                            showCourseSidelinesOnMap(raceMapDataDTO.courseSidelines);
-                            showStartAndFinishAndCourseMiddleLines(raceMapDataDTO.coursePositions);
-                            showStartLineToFirstMarkTriangle(raceMapDataDTO.coursePositions);
-                        }
+                        // Do mark specific actions
+                        showCourseMarksOnMap(raceMapDataDTO.coursePositions);
+                        showCourseSidelinesOnMap(raceMapDataDTO.courseSidelines);
+                        showStartAndFinishAndCourseMiddleLines(raceMapDataDTO.coursePositions);
+                        showStartLineToFirstMarkTriangle(raceMapDataDTO.coursePositions);
                             
                         // Rezoom the map
                         LatLngBounds zoomToBounds = null;
@@ -982,7 +968,22 @@ public class RaceMap extends AbsolutePanel implements TimeListener, CompetitorSe
                     lastTimeChangeBeforeInitialization = newTime;
                 }
             }
-        };
+        });
+    }
+
+    private void updateBoatPositions(final Date newTime, final long transitionTimeInMillis,
+            final Map<CompetitorDTO, Boolean> hasTailOverlapForCompetitor,
+            final Iterable<CompetitorDTO> competitorsToShow, Map<CompetitorDTO, List<GPSFixDTO>> boatData) {
+        fixesAndTails.updateFixes(boatData, hasTailOverlapForCompetitor, RaceMap.this, transitionTimeInMillis);
+        Iterable<CompetitorDTO> competitorsForWhichNewFixesWereReveiced =
+                fixesAndTails.updateFixes(boatData, hasTailOverlapForCompetitor, RaceMap.this, transitionTimeInMillis);
+        if (!Util.isEmpty(competitorsForWhichNewFixesWereReveiced)) {
+            showBoatsOnMap(newTime, transitionTimeInMillis, competitorsForWhichNewFixesWereReveiced);
+            showCompetitorInfoOnMap(newTime, transitionTimeInMillis, competitorSelection.getSelectedFilteredCompetitors());
+            // even though the wind data is retrieved by a separate call, re-draw the advantage line because it needs to
+            // adjust to new boat positions
+            showAdvantageLine(competitorsToShow, newTime, transitionTimeInMillis);
+        }
     }
 
     private void showCourseSidelinesOnMap(List<SidelineDTO> sidelinesDTOs) {

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java

@@ -291,6 +291,7 @@ import com.sap.sailing.domain.tractracadapter.TracTracConnectionConstants;
 import com.sap.sailing.gwt.ui.adminconsole.RaceLogSetTrackingTimesDTO;
 import com.sap.sailing.gwt.ui.client.SailingService;
 import com.sap.sailing.gwt.ui.shared.BulkScoreCorrectionDTO;
+import com.sap.sailing.gwt.ui.shared.CompactBoatPositionsDTO;
 import com.sap.sailing.gwt.ui.shared.CompactRaceMapDataDTO;
 import com.sap.sailing.gwt.ui.shared.CompetitorRaceDataDTO;
 import com.sap.sailing.gwt.ui.shared.CompetitorsRaceDataDTO;
@@ -1640,7 +1641,7 @@ public class SailingServiceImpl extends ProxiedRemoteServiceServlet implements S
     public CompactRaceMapDataDTO getRaceMapData(RegattaAndRaceIdentifier raceIdentifier, Date date,
             Map<String, Date> fromPerCompetitorIdAsString, Map<String, Date> toPerCompetitorIdAsString,
             boolean extrapolate, LegIdentifier simulationLegIdentifier) throws NoWindException {
-        final Map<CompetitorDTO, List<GPSFixDTO>> boatPositions = getBoatPositions(raceIdentifier,
+        final Map<CompetitorDTO, List<GPSFixDTO>> boatPositions = getBoatPositionsInternal(raceIdentifier,
                 fromPerCompetitorIdAsString, toPerCompetitorIdAsString, extrapolate);
         final CoursePositionsDTO coursePositions = getCoursePositions(raceIdentifier, date);
         final List<SidelineDTO> courseSidelines = getCourseSidelines(raceIdentifier, date);
@@ -1670,6 +1671,14 @@ public class SailingServiceImpl extends ProxiedRemoteServiceServlet implements S
         return competitorBoats;
     }
     
+    
+    @Override
+    public CompactBoatPositionsDTO getBoatPositions(RegattaAndRaceIdentifier raceIdentifier,
+            Map<String, Date> fromPerCompetitorIdAsString, Map<String, Date> toPerCompetitorIdAsString,
+            boolean extrapolate) throws NoWindException {
+        return new CompactBoatPositionsDTO(getBoatPositionsInternal(raceIdentifier, fromPerCompetitorIdAsString, toPerCompetitorIdAsString, extrapolate));
+    }
+
     /**
      * {@link LegType}s are cached within the method with a resolution of one minute. The cache key is a pair of
      * {@link TrackedLegOfCompetitor} and {@link TimePoint}.
@@ -1688,7 +1697,7 @@ public class SailingServiceImpl extends ProxiedRemoteServiceServlet implements S
      * @return a map where for each competitor participating in the race the list of GPS fixes in increasing
      *         chronological order is provided. The last one is the last position at or before <code>date</code>.
      */
-    private Map<CompetitorDTO, List<GPSFixDTO>> getBoatPositions(RegattaAndRaceIdentifier raceIdentifier,
+    private Map<CompetitorDTO, List<GPSFixDTO>> getBoatPositionsInternal(RegattaAndRaceIdentifier raceIdentifier,
             Map<String, Date> fromPerCompetitorIdAsString, Map<String, Date> toPerCompetitorIdAsString,
             boolean extrapolate)
             throws NoWindException {

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/CompactBoatPositionsDTO.java

@@ -0,0 +1,31 @@
+package com.sap.sailing.gwt.ui.shared;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import com.google.gwt.user.client.rpc.IsSerializable;
+import com.sap.sailing.domain.common.dto.CompetitorDTO;
+
+public class CompactBoatPositionsDTO implements IsSerializable {
+    private Map<String, List<GPSFixDTO>> boatPositions;
+
+    CompactBoatPositionsDTO() {} // for GWT serialization only
+    
+    public CompactBoatPositionsDTO(Map<CompetitorDTO, List<GPSFixDTO>> boatPositions) {
+        super();
+        this.boatPositions = new HashMap<>();
+        for (final Entry<CompetitorDTO, List<GPSFixDTO>> e : boatPositions.entrySet()) {
+            this.boatPositions.put(e.getKey().getIdAsString(), e.getValue());
+        }
+    }
+
+    public Map<CompetitorDTO, List<GPSFixDTO>> getBoatPositionsForCompetitors(Map<String, CompetitorDTO> competitorsByIdsAsStrings) {
+        final Map<CompetitorDTO, List<GPSFixDTO>> result = new HashMap<>();
+        for (final Entry<String, List<GPSFixDTO>> e : boatPositions.entrySet()) {
+            result.put(competitorsByIdsAsStrings.get(e.getKey()), e.getValue());
+        }
+        return result;
+    }
+}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/CompactRaceMapDataDTO.java

@@ -23,7 +23,7 @@ import com.sap.sse.common.Util;
  * 
  */
 public class CompactRaceMapDataDTO implements IsSerializable {
-    private Map<String, List<GPSFixDTO>> boatPositionsByCompetitorIdAsString;
+    private CompactBoatPositionsDTO boatPositionsByCompetitorIdAsString;
 
     private CoursePositionsDTO coursePositions;
     private List<SidelineDTO> courseSidelines;
@@ -35,10 +35,7 @@ public class CompactRaceMapDataDTO implements IsSerializable {
 
     public CompactRaceMapDataDTO(Map<CompetitorDTO, List<GPSFixDTO>> boatPositions, CoursePositionsDTO coursePositions,
            List<SidelineDTO> courseSidelines, QuickRanksDTO quickRanks, long simulationResultVersion) {
-        this.boatPositionsByCompetitorIdAsString = new HashMap<String, List<GPSFixDTO>>();
-        for (Map.Entry<CompetitorDTO, List<GPSFixDTO>> e : boatPositions.entrySet()) {
-            this.boatPositionsByCompetitorIdAsString.put(e.getKey().getIdAsString(), e.getValue());
-        }
+        this.boatPositionsByCompetitorIdAsString = new CompactBoatPositionsDTO(boatPositions);
         this.quickRanks = new ArrayList<CompactQuickRankDTO>(quickRanks == null ? 0 : Util.size(quickRanks.getQuickRanks()));
         this.competitorsInOrderOfWindwardDistanceTraveledFarthestFirstIdAsStringAndOneBasedLegNumber = new LinkedHashMap<>();
         Map<String, Integer> competitorIdAsStringToOneBasedLegNumber = new HashMap<>();
@@ -59,11 +56,7 @@ public class CompactRaceMapDataDTO implements IsSerializable {
         this.simulationResultVersion = simulationResultVersion;
     }
     
-    public RaceMapDataDTO getRaceMapDataDTO(Iterable<CompetitorDTO> competitors) {
-        Map<String, CompetitorDTO> competitorsByIdAsString = new HashMap<String, CompetitorDTO>();
-        for (CompetitorDTO competitor : competitors) {
-            competitorsByIdAsString.put(competitor.getIdAsString(), competitor);
-        }
+    public RaceMapDataDTO getRaceMapDataDTO(Map<String, CompetitorDTO> competitorsByIdAsString) {
         RaceMapDataDTO result = new RaceMapDataDTO();
         result.quickRanks = new LinkedHashMap<CompetitorDTO, QuickRankDTO>(this.quickRanks.size());
         for (CompactQuickRankDTO compactQuickRank : this.quickRanks) {
@@ -74,14 +67,7 @@ public class CompactRaceMapDataDTO implements IsSerializable {
         }
         result.courseSidelines = courseSidelines;
         result.coursePositions = coursePositions;
-        result.boatPositions = new HashMap<CompetitorDTO, List<GPSFixDTO>>();
-        for (Map.Entry<String, List<GPSFixDTO>> e : boatPositionsByCompetitorIdAsString.entrySet()) {
-            final CompetitorDTO competitor = competitorsByIdAsString.get(e.getKey());
-            if (competitor != null) {
-                // maybe null in case the competitor was added, e.g., by unsuppressing, while this call was underway
-                result.boatPositions.put(competitor, e.getValue());
-            }
-        }
+        result.boatPositions = boatPositionsByCompetitorIdAsString.getBoatPositionsForCompetitors(competitorsByIdAsString);
         result.competitorsInOrderOfWindwardDistanceTraveledWithOneBasedLegNumber = new LinkedHashMap<>();
         for (Entry<String, Integer> i : competitorsInOrderOfWindwardDistanceTraveledFarthestFirstIdAsStringAndOneBasedLegNumber.entrySet()) {
             CompetitorDTO c = competitorsByIdAsString.get(i.getKey());