initial revision.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1282 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/parlor/game/AIGameTicker.java

@@ -0,0 +1,102 @@
+//
+// $Id: AIGameTicker.java,v 1.1 2002/04/19 18:33:32 ray Exp $
+
+package com.threerings.parlor.game;
+
+import java.util.Iterator;
+import java.util.ArrayList;
+
+import com.samskivert.util.Interval;
+import com.samskivert.util.IntervalManager;
+
+import com.threerings.crowd.server.CrowdServer;
+
+/**
+ * Handles ticking all the GameManagers that are hosting games with AIs.
+ */
+public class AIGameTicker implements Interval, Runnable
+{
+    /**
+     * Register the specified GameManager to receive AI ticks.
+     */
+    public static synchronized void registerAIGame (GameManager mgr)
+    {
+        if (_ticker == null) {
+            _ticker = new AIGameTicker();
+        }
+        _ticker.addAIGame(mgr);
+    }
+
+    /**
+     * Take the specified GameManager off the AI tick list.
+     */
+    public static synchronized void unregisterAIGame (GameManager mgr)
+    {
+        if (_ticker != null) {
+            _ticker.removeAIGame(mgr);
+        }
+    }
+
+    /**
+     * Construct an AIGameTicker and start it ticking.
+     */
+    private AIGameTicker ()
+    {
+        _games = new ArrayList();
+
+        _id = IntervalManager.register(this, TICK_FREQUENCY, null, true);
+    }
+
+    /**
+     * Add the specified manager to the list of those receiving AI ticks.
+     */
+    protected void addAIGame (GameManager mgr)
+    {
+        _games.add(mgr);
+    }
+
+    /**
+     * Remove the specified manager from receiving AI ticks.
+     *
+     * @return true if there are no more games.
+     */
+    protected void removeAIGame (GameManager mgr)
+    {
+        _games.remove(mgr);
+
+        // if there aren't any AIs, let's 
+        if (_games.size() == 0) {
+            _ticker = null;
+            IntervalManager.remove(_id);
+        }
+    }
+
+    // documentation inherited from interface
+    public void intervalExpired (int id, Object arg)
+    {
+        CrowdServer.omgr.postUnit(this);
+    }
+
+    /**
+     * Tick all the game AIs while on the dobj thread.
+     */
+    public void run ()
+    {
+        Iterator iter = _games.iterator();
+        while (iter.hasNext()) {
+            ((GameManager) iter.next()).tickAIs();
+        }
+    }
+
+    /** Our list of ai games. */
+    protected ArrayList _games;
+
+    /** Our interval id. */
+    protected int _id;
+
+    /** Our single ticker for all AI games. */
+    protected static AIGameTicker _ticker;
+
+    /** The frequency with which we dispatch AI game ticks. */
+    protected static final long TICK_FREQUENCY = 3333L; // every 3 1/3 seconds
+}