Allow a derived place registry to be used.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3266 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -25,6 +25,8 @@ import java.util.Iterator;
 
 import com.threerings.util.Name;
 
+import com.threerings.presents.dobj.RootDObjectManager;
+import com.threerings.presents.server.InvocationManager;
 import com.threerings.presents.server.PresentsServer;
 
 import com.threerings.crowd.Log;
@@ -62,7 +64,7 @@ public class CrowdServer extends PresentsServer
         clmgr.setClientResolverClass(CrowdClientResolver.class);
 
         // create our place registry
-        plreg = new PlaceRegistry(invmgr, omgr);
+        plreg = createPlaceRegistry(invmgr, omgr);
 
         // create our access control implementation
         actrl = createAccessControl();
@@ -76,6 +78,15 @@ public class CrowdServer extends PresentsServer
         Log.info("Crowd server initialized.");
     }
 
+    /**
+     * Allow derived instances to create a custom {@link PlaceRegistry}.
+     */
+    protected PlaceRegistry createPlaceRegistry (
+        InvocationManager invmgr, RootDObjectManager omgr)
+    {
+        return new PlaceRegistry(invmgr, omgr);
+    }
+
     /**
      * Creates the {@link AccessControl} instance used to limit access to
      * system features. The default implementation refuses access to