Revamped PlaceConfig to instantiate the PlaceController directly instead of

looking it up by name which creates PITA when we want to obfuscate and strip
out unused code.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4026 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/crowd/client/LocationDirector.java

@@ -291,24 +291,14 @@ public class LocationDirector extends BasicDirector
         // make a note that we're now mostly in the new location
         _placeId = placeId;
 
-        // check whether we should use a custom class loader
-        ClassLoader loader = getClassLoader(config);
-        if (loader != null) {
-            config.setClassLoader(loader);
-        }
-
-        Class cclass = config.getControllerClass();
-        try {
-            // start up a new place controller to manage the new place
-            _controller = (PlaceController)cclass.newInstance();
-            _controller.init(_ctx, config);
-
-        } catch (Exception e) {
-            Log.warning("Error creating or initializing place controller " +
-                        "[cclass=" + cclass.getName() +
-                        ", config=" + config + "].");
-            Log.logStackTrace(e);
+        // start up a new place controller to manage the new place
+        _controller = createController(config);
+        if (_controller == null) {
+            Log.warning("Place config returned null controller " +
+                        "[config=" + config + "].");
+            return;
         }
+        _controller.init(_ctx, config);
 
         // subscribe to our new place object to complete the move
         _ctx.getDObjectManager().subscribeToObject(_placeId, this);
@@ -578,15 +568,14 @@ public class LocationDirector extends BasicDirector
     }
 
     /**
-     * By overriding this method, it is possible to customize the location
-     * director to cause it to load the classes associated with a
-     * particular place via a custom class loader. That loader may enforce
-     * restricted privileges or obtain the classes from some special
-     * source.
+     * Called to create our place controller using the supplied place
+     * configuration. This lives in a separate method so that derived instances
+     * can do funny class loader business if necessary to load the place
+     * controller using a sandboxed class loader.
      */
-    protected ClassLoader getClassLoader (PlaceConfig config)
+    protected PlaceController createController (PlaceConfig config)
     {
-        return null;
+        return config.createController();
     }
 
     /** The context through which we access needed services. */

src/java/com/threerings/crowd/data/PlaceConfig.java

@@ -25,7 +25,7 @@ import com.samskivert.util.StringUtil;
 
 import com.threerings.io.SimpleStreamableObject;
 
-import com.threerings.crowd.client.LocationDirector;
+import com.threerings.crowd.Log;
 import com.threerings.crowd.client.PlaceController;
 
 /**
@@ -35,45 +35,61 @@ import com.threerings.crowd.client.PlaceController;
  * and place controller are provided with the place config object when the
  * place is created.
  *
- * <p> The place config object is also the mechanism used to instantiate
- * the appropriate place manager and controller. Every place must have an
+ * <p> The place config object is also the mechanism used to instantiate the
+ * appropriate place manager and controller. Every place must have an
  * associated place config derived class that overrides {@link
- * #getControllerClass} and {@link #getManagerClassName}, returning the
+ * #createController} and {@link #getManagerClassName}, returning the
  * appropriate place controller and manager class for that place.
  */
 public abstract class PlaceConfig extends SimpleStreamableObject
 {
+    /**
+     * Returns the class that should be used to create a controller for this
+     * place. The controller class must derive from {@link PlaceController}.
+     *
+     * @deprecated Override {@link #createController} directly.
+     */
+    public Class getControllerClass ()
+    {
+        return null;
+    }
+
     /**
      * Returns the class that should be used to create a controller for
      * this place. The controller class must derive from {@link
      * PlaceController}.
      */
-    public abstract Class getControllerClass ();
+    public PlaceController createController ()
+    {
+        Class cclass = getControllerClass();
+        if (cclass == null) {
+            throw new RuntimeException(
+                "PlaceConfig.createController() must be overridden.");
+        }
+
+        Log.warning("Providing backwards compatibility. PlaceConfig." +
+                    "createController() should be overridden directly.");
+        try {
+            return (PlaceController)cclass.newInstance();
+        } catch (Exception e) {
+            Log.warning("Failed to instantiate controller class '" +
+                        cclass + "'.");
+            Log.logStackTrace(e);
+            return null;
+        }
+    }
 
     /**
-     * Returns the name of the class that should be used to create a
-     * manager for this place. The manager class must derive from {@link
-     * com.threerings.crowd.server.PlaceManager}. <em>Note:</em> this
-     * method differs from {@link #getControllerClass} because we want to
-     * avoid compile time linkage of the place config object (which is
-     * used on the client) to server code. This allows a code optimizer
-     * (DashO Pro, for example) to remove the server code from the client,
-     * knowing that it is never used.
+     * Returns the name of the class that should be used to create a manager
+     * for this place. The manager class must derive from {@link
+     * com.threerings.crowd.server.PlaceManager}. <em>Note:</em> this method
+     * differs from {@link #createController} because we want to avoid compile
+     * time linkage of the place config object (which is used on the client) to
+     * server code. This allows a code optimizer (DashO Pro, for example) to
+     * remove the server code from the client, knowing that it is never used.
      */
     public abstract String getManagerClassName ();
 
-    /**
-     * The {@link LocationDirector} may be configured to use a custom
-     * class loader when loading the classes associated with a certain
-     * {@link PlaceConfig}, in this case this method will be called prior
-     * to a call to {@link #getControllerClass} to set {@link #_loader}
-     * which should then be used for any dynamic class loading.
-     */
-    public void setClassLoader (ClassLoader loader)
-    {
-        _loader = loader;
-    }
-
     // documentation inherited
     protected void toString (StringBuffer buf)
     {
@@ -81,7 +97,4 @@ public abstract class PlaceConfig extends SimpleStreamableObject
         buf.append(", ");
         super.toString(buf);
     }
-
-    /** The class loader to use when dynamically loading controller classes. */
-    protected transient ClassLoader _loader = getClass().getClassLoader();
 }

src/java/com/threerings/micasa/lobby/LobbyConfig.java

@@ -27,16 +27,17 @@ import javax.swing.JLabel;
 import java.util.Properties;
 import com.samskivert.util.StringUtil;
 
+import com.threerings.crowd.client.PlaceController;
 import com.threerings.crowd.data.PlaceConfig;
-import com.threerings.parlor.game.data.GameConfig;
 import com.threerings.micasa.util.MiCasaContext;
+import com.threerings.parlor.game.data.GameConfig;
 
 public class LobbyConfig extends PlaceConfig
 {
     // documentation inherited
-    public Class getControllerClass ()
+    public PlaceController createController ()
     {
-        return LobbyController.class;
+        return new LobbyController();
     }
 
     // documentation inherited
@@ -64,7 +65,7 @@ public class LobbyConfig extends PlaceConfig
     public GameConfig getGameConfig ()
         throws Exception
     {
-        return (GameConfig)_loader.loadClass(_gameConfigClass).newInstance();
+        return (GameConfig)Class.forName(_gameConfigClass).newInstance();
     }
 
     /**

src/java/com/threerings/parlor/game/data/GameConfig.java

@@ -32,20 +32,19 @@ import com.threerings.parlor.game.client.GameConfigurator;
 
 /**
  * The game config class encapsulates the configuration information for a
- * particular type of game. The hierarchy of game config objects mimics
- * the hierarchy of game managers and controllers. Both the game manager
- * and game controller are provided with the game config object when the
- * game is created.
+ * particular type of game. The hierarchy of game config objects mimics the
+ * hierarchy of game managers and controllers. Both the game manager and game
+ * controller are provided with the game config object when the game is
+ * created.
  *
- * <p> The game config object is also the mechanism used to instantiate
- * the appropriate game manager and controller. Every game must have an
- * associated game config derived class that overrides {@link
- * #getControllerClass} and {@link #getManagerClassName}, returning the
- * appropriate game controller and manager class for that game. Thus the
- * entire chain of events that causes a particular game to be created is
- * the construction of the appropriate game config instance which is
- * provided to the server as part of an invitation or via some other
- * matchmaking mechanism.
+ * <p> The game config object is also the mechanism used to instantiate the
+ * appropriate game manager and controller. Every game must have an associated
+ * game config derived class that overrides {@link #createController} and
+ * {@link #getManagerClassName}, returning the appropriate game controller and
+ * manager class for that game. Thus the entire chain of events that causes a
+ * particular game to be created is the construction of the appropriate game
+ * config instance which is provided to the server as part of an invitation or
+ * via some other matchmaking mechanism.
  */
 public abstract class GameConfig extends PlaceConfig implements Cloneable
 {

src/java/com/threerings/stage/data/StageSceneConfig.java

@@ -3,6 +3,7 @@
 
 package com.threerings.stage.data;
 
+import com.threerings.crowd.client.PlaceController;
 import com.threerings.crowd.data.PlaceConfig;
 
 import com.threerings.stage.client.StageSceneController;
@@ -13,9 +14,9 @@ import com.threerings.stage.client.StageSceneController;
 public class StageSceneConfig extends PlaceConfig
 {
     // documentation inherited
-    public Class getControllerClass ()
+    public PlaceController createController ()
     {
-        return StageSceneController.class;
+        return new StageSceneController();
     }
 
     // documentation inherited

src/java/com/threerings/whirled/data/DefaultSceneConfig.java

@@ -1,5 +1,5 @@
 //
-// $Id: DefaultSceneConfig.java,v 1.2 2004/08/27 02:20:42 mdb Exp $
+// $Id$
 //
 // Narya library - tools for developing networked games
 // Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
@@ -36,12 +36,6 @@ import com.threerings.whirled.client.SceneController;
  */
 public class DefaultSceneConfig extends PlaceConfig
 {
-    // documentation inherited
-    public Class getControllerClass ()
-    {
-        return SceneController.class;
-    }
-
     // documentation inherited
     public String getManagerClassName ()
     {