added a test case that checks DistanceCache size limitation

java/com.sap.sailing.domain.test/src/com/sap/sailing/domain/test/TrackTest.java

@@ -917,7 +917,14 @@ public class TrackTest {
         final Duration raceDuration = Duration.ONE_HOUR.times(48);
         final Speed speed = new KnotSpeedImpl(12);
         final Distance distancePerSample = speed.travel(fixTime, fixTime.plus(samplingInterval));
-        DynamicGPSFixTrack<Object, GPSFix> track = new DynamicGPSFixTrackImpl<Object>(new Object(), /* millisecondsOverWhichToAverage */ 30000l);
+        final DistanceCache distanceCache = new DistanceCache("test-DistanceCache");
+        DynamicGPSFixTrack<Object, GPSFix> track = new DynamicGPSFixTrackImpl<Object>(new Object(), /* millisecondsOverWhichToAverage */ 30000l) {
+            private static final long serialVersionUID = -7277196393160609503L;
+            @Override
+            protected DistanceCache getDistanceCache() {
+                return distanceCache;
+            }
+        };
         while (fixTime.before(start.plus(raceDuration))) {
             for (int i=0; i<transmissionInterval.divide(samplingInterval); i++) {
                 // produce a bulk of fixes
@@ -935,7 +942,7 @@ public class TrackTest {
                 queryTime = queryTime.plus(queryInterval);
             }
         }
-        System.out.println();
+        assertTrue(distanceCache.size() <= DistanceCache.MAX_SIZE);
     }
     
     @Test

java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/DistanceCache.java

@@ -71,7 +71,7 @@ import com.sap.sse.util.impl.ArrayListNavigableSet;
  * @author Axel Uhl (D043530)
  */
 public class DistanceCache {
-    private static final int MAX_SIZE = 100;
+    public static final int MAX_SIZE = 100;
     
     private final NavigableSet<Util.Pair<TimePoint, NavigableSet<Util.Pair<TimePoint, Distance>>>> distanceCache;
     
@@ -122,6 +122,10 @@ public class DistanceCache {
         };
     }
     
+    public int size() {
+        return lruCache.size();
+    }
+    
     private void removeCacheEntry(TimePoint from, TimePoint to) {
         assert lock.getWriteHoldCount() == 1; // we can be sure we are alone here; this only happens when adding a new entry, holding the write lock
         Util.Pair<TimePoint, NavigableSet<Util.Pair<TimePoint, Distance>>> entryForTo = distanceCache.floor(createDummy(to));