Beginnings of Whirled service which is a system for building worlds made

of interconnected scenes on top of the Cocktail services.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@228 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/whirled/server/SceneProvider.java

@@ -0,0 +1,83 @@
+//
+// $Id: SceneProvider.java,v 1.1 2001/08/11 04:09:50 mdb Exp $
+
+package com.threerings.whirled.server;
+
+import com.threerings.cocktail.cher.server.InvocationProvider;
+import com.threerings.cocktail.cher.util.Codes;
+
+import com.threerings.cocktail.party.data.BodyObject;
+import com.threerings.cocktail.party.data.PlaceObject;
+import com.threerings.cocktail.party.server.LocationProvider;
+
+import com.threerings.whirled.Log;
+
+/**
+ * The scene provider handles the server side of the scene related
+ * invocation services (e.g. moving from scene to scene).
+ */
+public class SceneProvider extends InvocationProvider
+{
+    /**
+     * Processes a request from a client to move to a new scene.
+     */
+    public void handleMoveToRequest (BodyObject source, int invid,
+                                     int sceneId, int sceneVersion)
+    {
+        // avoid cluttering up the method declaration with final keywords
+        final BodyObject fsource = source;
+        final int finvid = invid;
+        final int fsceneVer = sceneVersion;
+
+        // create a callback object that will handle the resolution or
+        // failed resolution of the scene
+        SceneRegistry.ResolutionListener rl =
+            new SceneRegistry.ResolutionListener()
+        {
+            public void sceneWasResolved (SceneManager scmgr)
+            {
+                finishMoveToRequest(fsource, finvid, scmgr, fsceneVer);
+            }
+
+            public void sceneFailedToResolve (
+                int rsceneId, Exception reason)
+            {
+                Log.warning("Unable to resolve scene [sceneid=" + rsceneId +
+                            ", reason=" + reason + "].");
+                // pretend like the scene doesn't exist to the client
+                sendResponse(fsource, finvid, "MoveFailed",
+                             "m.no_such_place");
+            }
+        };
+
+        // make sure the scene they are headed to is actually loaded into
+        // the server
+        WhirledServer.screg.resolveScene(sceneId, rl);
+    }
+
+    /**
+     * This is called after the scene to which we are moving is guaranteed
+     * to have been loaded into the server.
+     */
+    protected void finishMoveToRequest (BodyObject source, int invid,
+                                        SceneManager scmgr, int sceneVersion)
+    {
+        // move to the place object associated with this scene
+        PlaceObject plobj = scmgr.getPlaceObject();
+        int ploid = plobj.getOid();
+
+        // try doing the actual move
+        String rcode = LocationProvider.moveTo(source, ploid);
+
+        // if the move failed, let them know
+        if (!rcode.equals(Codes.SUCCESS)) {
+            sendResponse(source, invid, "MoveFailed", rcode);
+            return;
+        }
+
+        // otherwise check to see if they need a newer version of the
+        // scene data
+
+        sendResponse(source, invid, "MoveSucceeded", new Integer(ploid));
+    }
+}