Finished up handling of bodies moving from place to place. Added callback

methods into PlaceManager that can be overridden to do things when bodies
enter or leave a place.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@175 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/crowd/server/LocationProvider.java

@@ -1,5 +1,5 @@
 //
-// $Id: LocationProvider.java,v 1.1 2001/07/23 21:14:27 mdb Exp $
+// $Id: LocationProvider.java,v 1.2 2001/08/04 01:13:36 mdb Exp $
 
 package com.threerings.cocktail.party.server;
 
@@ -28,9 +28,41 @@ public class LocationProvider extends InvocationProvider
             return createResponse("MoveFailed", "m.no_such_place");
         }
 
+        // acquire a lock on the body object to ensure that rapid fire
+        // moveto requests don't break things
+        if (!source.acquireLock("moveToLock")) {
+            // if we're still locked, a previous moveTo request hasn't
+            // been fully processed
+            return createResponse("MoveFailed", "m.move_in_progress");
+        }
+
+        // find out if they were previously in some other location
+        if (source.location != -1) {
+            // remove them from the occupant list of the previous location
+            try {
+                PlaceObject pold = (PlaceObject)
+                    CherServer.omgr.getObject(source.location);
+                pold.removeFromOccupants(source.getOid());
+
+            } catch (ClassCastException cce) {
+                Log.warning("Body claims to be at location which " +
+                            "references non-PlaceObject!? " +
+                            "[boid=" + source.getOid() +
+                            ", poid=" + source.location  + "].");
+            }
+        }
+
         // add the body object id to the place object's occupant list
         PlaceObject place = (PlaceObject)pobj;
         place.addToOccupants(source.getOid());
+
+        // set their new location
+        source.setLocation(place.getOid());
+
+        // and finally queue up a lock release event to release the lock
+        // once all these events are processed
+        source.releaseLock("moveToLock");
+
         return createResponse("MoveSucceeded");
     }
 }