first successful tiny and trivial Operational Transformation test, replicating the addition of a leaderboard

java/com.sap.sailing.mongodb/src/com/sap/sailing/mongodb/internal/MongoDBServiceImpl.java

@@ -35,18 +35,16 @@ public class MongoDBServiceImpl implements MongoDBService {
         return configuration;
     }
 
-    public void setConfiguration(MongoDBConfiguration configuration)
-    {
+    public void setConfiguration(MongoDBConfiguration configuration) {
         this.configuration = configuration;
         logger.info("Used Mongo configuration: host:port/DBName: "+configuration.getHostName()+":"+configuration.getPort()+"/"+configuration.getDatabaseName());
     }
 
     public DB getDB() {
-        if(configuration == null) {
+        if (configuration == null) {
             configuration = MongoDBConfiguration.getDefaultTestConfiguration();
             logger.info("Used default Mongo configuration: host:port/DBName: "+configuration.getHostName()+":"+configuration.getPort()+"/"+configuration.getDatabaseName());
         }
-        
         try {
             return getDB(configuration);
         } catch (UnknownHostException e) {

java/com.sap.sailing.operationaltransformation/src/com/sap/sailing/operationaltransformation/PeerImpl.java

@@ -104,7 +104,7 @@ public class PeerImpl<O extends Operation<S>, S> implements Peer<O, S> {
     
     @Override
     public S addPeer(Peer<O, S> peer) {
-	if ( role == Role.CLIENT && getPeers().size() > 0) {
+	if (role == Role.CLIENT && getPeers().size() > 0) {
 	    throw new RuntimeException("A client must be connected to at most one server");
 	}
 	unmergedOperationsForPeer.put(peer, new UnmergedOperationsQueue<O, S>());
@@ -193,6 +193,7 @@ public class PeerImpl<O extends Operation<S>, S> implements Peer<O, S> {
 			 * by this peer's apply(...) method.
 			 */
 			peer.apply(PeerImpl.this, operation, numberOfMergedOpsForPeer);
+			// TODO what to do if apply throws a RuntimeException?
 		    }
 		});
 	    }

java/com.sap.sailing.server.test/META-INF/MANIFEST.MF

@@ -10,7 +10,10 @@ Require-Bundle: com.sap.sailing.server,
  com.sap.sailing.domain.tractracadapter,
  com.sap.sailing.domain.swisstimingadapter,
  com.sap.sailing.domain.common,
- com.sap.sailing.expeditionconnector
+ com.sap.sailing.expeditionconnector,
+ com.sap.sailing.operationaltransformation,
+ com.sap.sailing.mongodb,
+ com.mongodb.driver;bundle-version="2.6.2"
 Import-Package: junit.framework;version="4.8.1",
  org.junit;version="4.8.1",
  com.tractrac.clientmodule,

java/com.sap.sailing.server.test/src/com/sap/sailing/server/test/OperationalTransformationTest.java

@@ -0,0 +1,56 @@
+package com.sap.sailing.server.test;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Map;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.sap.sailing.domain.common.DefaultLeaderboardName;
+import com.sap.sailing.domain.leaderboard.Leaderboard;
+import com.sap.sailing.mongodb.MongoDBService;
+import com.sap.sailing.operationaltransformation.Peer;
+import com.sap.sailing.operationaltransformation.Peer.Role;
+import com.sap.sailing.operationaltransformation.PeerImpl;
+import com.sap.sailing.server.RacingEventService;
+import com.sap.sailing.server.impl.RacingEventServiceImpl;
+import com.sap.sailing.server.operationaltransformation.AddLeaderboard;
+import com.sap.sailing.server.operationaltransformation.OperationalTransformer;
+import com.sap.sailing.server.operationaltransformation.RacingEventServiceOperation;
+
+public class OperationalTransformationTest {
+    private static final String LEADERBOARDNAME = "TESTBOARD";
+
+    private RacingEventService racingEventServiceServer;
+    private RacingEventService racingEventServiceReplica;
+    private Peer<RacingEventServiceOperation, RacingEventService> server;
+    private Peer<RacingEventServiceOperation, RacingEventService> replica;
+
+    @Before
+    public void setUp() {
+        // ensure that leaderboards will be loaded from and stored to the test database which is 
+        MongoDBService.INSTANCE.getDB().dropDatabase();
+        racingEventServiceServer = new RacingEventServiceImpl();
+        racingEventServiceReplica = new RacingEventServiceImpl();
+        OperationalTransformer transformer = new OperationalTransformer();
+        server = new PeerImpl<>(transformer, racingEventServiceServer, Role.SERVER);
+        replica = new PeerImpl<>(transformer, racingEventServiceReplica, Role.CLIENT);
+        // wire the peers:
+        server.addPeer(replica);
+        replica.addPeer(server);
+    }
+
+    @Test
+    public void testAddLeaderboard() {
+        RacingEventServiceOperation addLeaderboardOp = new AddLeaderboard(LEADERBOARDNAME, new int[] { 5 });
+        server.apply(addLeaderboardOp);
+        server.waitForNotRunning();
+        Map<String, Leaderboard> replicaLeaderboards = racingEventServiceReplica.getLeaderboards();
+        assertEquals(2, replicaLeaderboards.size()); // expected to include the default leaderboard
+        assertEquals(new HashSet<String>(Arrays.asList(new String[] { DefaultLeaderboardName.DEFAULT_LEADERBOARD_NAME, LEADERBOARDNAME })),
+                replicaLeaderboards.keySet());
+    }
+}

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

@@ -30,5 +30,6 @@ Export-Package: com.sap.sailing.server,
   x-friends:="com.sap.sailing.mongodb.test,
    com.sap.sailing.server.test,
    com.sap.sailing.domain.swisstimingadapter.test,
-   com.sap.sailing.gwt.ui.test"
+   com.sap.sailing.gwt.ui.test",
+ com.sap.sailing.server.operationaltransformation
 Web-ContextPath: /sailingserver

java/com.sap.sailing.server/src/com/sap/sailing/server/operationaltransformation/AddLeaderboard.java

@@ -0,0 +1,33 @@
+package com.sap.sailing.server.operationaltransformation;
+
+import com.sap.sailing.server.RacingEventService;
+
+public class AddLeaderboard extends AbstractRacingEventServiceOperation {
+    private final String leaderboardName;
+    private final int[] discardThresholds;
+
+    public AddLeaderboard(String leaderboardName, int[] discardThresholds) {
+        super();
+        this.leaderboardName = leaderboardName;
+        this.discardThresholds = discardThresholds;
+    }
+
+    @Override
+    public RacingEventService applyTo(RacingEventService toState) {
+        toState.addLeaderboard(leaderboardName, discardThresholds);
+        return toState;
+    }
+
+    @Override
+    public RacingEventServiceOperation transformClientOp(RacingEventServiceOperation serverOp) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public RacingEventServiceOperation transformServerOp(RacingEventServiceOperation clientOp) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+}