More work on invocation manager; modified startup sequence so that server

can get shit together before bootstrapping the client.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@68 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/client/Client.java

@@ -1,5 +1,5 @@
 //
-// $Id: Client.java,v 1.7 2001/07/19 05:56:20 mdb Exp $
+// $Id: Client.java,v 1.8 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.client;
 
@@ -8,6 +8,7 @@ import java.util.List;
 
 import com.threerings.cocktail.cher.Log;
 import com.threerings.cocktail.cher.dobj.DObjectManager;
+import com.threerings.cocktail.cher.net.BootstrapData;
 import com.threerings.cocktail.cher.net.Credentials;
 
 /**
@@ -142,28 +143,21 @@ public class Client
     }
 
     /**
-     * Every client has an associated <code>ClientObject</code> instance.
+     * Returns the oid of the client object associated with this session.
-     *
+     * It is only valid for the duration of the session.
-     * @return the oid of the client object or -1 if we are not currently
-     * connected to the server.
      */
     public int getClientOid ()
     {
-        return (_comm != null) ? _comm.getClientOid() : -1;
+        return _cloid;
     }
 
     /**
      * Returns the invocation manager associated with this session. This
-     * reference is only valid for the duration of the session and a new
+     * reference is only valid for the duration of the session.
-     * reference must be obtained if the client disconnects and reconnects
-     * to the server.
-     *
-     * @return the invocation manager in effect or null if we have no
-     * established connection to the server.
      */
     public InvocationManager getInvocationManager ()
     {
-        return (_comm != null) ? _comm.getInvocationManager() : null;
+        return _invmgr;
     }
 
     /**
@@ -249,6 +243,18 @@ public class Client
         _comm = null;
     }
 
+    /**
+     * Called by the omgr when a bootstrap notification arrives.
+     */
+    void gotBootstrap (BootstrapData data)
+    {
+        // extract bootstrap information
+        _cloid = data.clientOid;
+
+        // create our invocation manager
+        _invmgr = new InvocationManager(this, data.invOid);
+    }
+
     protected Credentials _creds;
     protected Invoker _invoker;
 
@@ -261,6 +267,9 @@ public class Client
     /** The entity that manages our network communications. */
     protected Communicator _comm;
 
+    protected int _cloid;
+    protected InvocationManager _invmgr;
+
     // client observer codes
     static final int CLIENT_DID_LOGON = 0;
     static final int CLIENT_FAILED_TO_LOGON = 1;

src/java/com/threerings/presents/client/ClientDObjectMgr.java

@@ -1,5 +1,5 @@
 //
-// $Id: ClientDObjectMgr.java,v 1.3 2001/06/13 05:17:54 mdb Exp $
+// $Id: ClientDObjectMgr.java,v 1.4 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.client;
 
@@ -109,7 +109,11 @@ public class ClientDObjectMgr
         Object obj;
         while ((obj = _actions.getNonBlocking()) != null) {
             // do the proper thing depending on the object
-            if (obj instanceof EventNotification) {
+            if (obj instanceof BootstrapNotification) {
+                BootstrapData data = ((BootstrapNotification)obj).getData();
+                _client.gotBootstrap(data);
+
+            } else if (obj instanceof EventNotification) {
                 DEvent evt = ((EventNotification)obj).getEvent();
                 dispatchEvent(evt);
 

src/java/com/threerings/presents/client/Communicator.java

@@ -1,5 +1,5 @@
 //
-// $Id: Communicator.java,v 1.8 2001/07/19 05:56:20 mdb Exp $
+// $Id: Communicator.java,v 1.9 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.client;
 
@@ -61,24 +61,6 @@ public class Communicator
         return _omgr;
     }
 
-    /**
-     * Returns the oid of the client object associated with this session.
-     * It is only valid for the duration of the session.
-     */
-    public int getClientOid ()
-    {
-        return _cloid;
-    }
-
-    /**
-     * Returns the invocation manager associated with this session. This
-     * reference is only valid for the duration of the session.
-     */
-    public InvocationManager getInvocationManager ()
-    {
-        return _invmgr;
-    }
-
     /**
      * Logs on to the server and initiates our full-duplex message
      * exchange.
@@ -171,15 +153,9 @@ public class Communicator
     {
         Log.info("Logon succeeded: " + data);
 
-        // extract bootstrap information
-        _cloid = data.clientOid;
-
         // create our distributed object manager
         _omgr = new ClientDObjectMgr(this, _client);
 
-        // create our invocation manager
-        _invmgr = new InvocationManager(_client, data.invOid);
-
         // create a new writer thread and start it up
         if (_writer != null) {
             throw new RuntimeException("Writer already started!?");
@@ -502,6 +478,4 @@ public class Communicator
     protected DataInputStream _din;
 
     protected ClientDObjectMgr _omgr;
-    protected int _cloid;
-    protected InvocationManager _invmgr;
 }

src/java/com/threerings/presents/client/InvocationDirector.java

@@ -1,5 +1,5 @@
 //
-// $Id: InvocationDirector.java,v 1.1 2001/07/19 05:56:20 mdb Exp $
+// $Id: InvocationDirector.java,v 1.2 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.client;
 
@@ -9,6 +9,7 @@ import java.util.HashMap;
 import com.threerings.cocktail.cher.Log;
 import com.threerings.cocktail.cher.data.*;
 import com.threerings.cocktail.cher.dobj.*;
+import com.threerings.cocktail.cher.util.ClassUtil;
 import com.threerings.cocktail.cher.util.IntMap;
 
 /**
@@ -53,28 +54,32 @@ public class InvocationManager
     /**
      * Sends an invocation request to the server. If a response target is
      * supplied, the response will be delivered to that object by calling
-     * a member function on it whose name is derived from the invocation
+     * a member function on it whose name is defined in the response
-     * name. For example, if the caller invoked a procedure named
+     * generated by the invocation implementation. In general, this is a
-     * <code>SwitchLocation</code>, the response would be delivered via a
+     * derivative of the invocation procedure name. For example, if the
-     * call to the <code>handleSwitchLocationResponse</code> method on the
+     * caller invoked a procedure named <code>Switch</code>, the response
-     * response target object. The signature of that method would be
+     * may be delivered via a call to the <code>handleSwitchSuccess</code>
-     * defined by the arguments provided in the response message.
+     * method on the response target object. The signature of that method
+     * would be defined by the arguments provided in the response message.
      *
-     * @param name the name of the invocation.
+     * @param module the name of the invocation module to use.
+     * @param procedure the name of the procedure within that module.
      * @param args the arguments of the invocation.
      * @param rsptarget the object that will receive the response, or null
      * if no response is desired.
      */
-    public void invoke (String name, Object[] args, Object rsptarget)
+    public void invoke (String module, String procedure, Object[] args,
+                        Object rsptarget)
     {
         int invid = nextInvocationId();
 
         // we need an args array for a message that can contain the
-        // invocation name, an invocation id and the invocation arguments
+        // invocation names, an invocation id and the invocation arguments
-        Object[] iargs = new Object[args.length+2];
+        Object[] iargs = new Object[args.length+3];
-        System.arraycopy(args, 0, iargs, 2, args.length);
+        iargs[0] = module;
-        iargs[0] = name;
+        iargs[1] = procedure;
-        iargs[1] = new Integer(invid);
+        iargs[2] = new Integer(invid);
+        System.arraycopy(args, 0, iargs, 3, args.length);
 
         // create a message event on the invocation manager object
         MessageEvent event = new MessageEvent(
@@ -83,7 +88,7 @@ public class InvocationManager
         // if we have a response target, register that for later receipt
         // of the response
         if (rsptarget != null) {
-            _targets.put(invid, new Response(name, rsptarget));
+            _targets.put(invid, rsptarget);
         }
 
         // and finally ship off the invocation message
@@ -110,9 +115,8 @@ public class InvocationManager
             return true;
         }
 
-        MessageEvent mevt = (MessageEvent)event;
-
         // and only those of proper name
+        MessageEvent mevt = (MessageEvent)event;
         if (!mevt.getName().equals(InvocationObject.MESSAGE_NAME)) {
             return true;
         }
@@ -120,11 +124,11 @@ public class InvocationManager
         // we've got an invocation response, so we extract the args and
         // process it
         Object[] args = mevt.getArgs();
-        int invid = ((Integer)args[0]).intValue();
+        String name = (String)args[0];
-        String name = (String)args[1];
+        int invid = ((Integer)args[1]).intValue();
 
-        Response rsp = (Response)_targets.get(invid);
+        Object rsptarg = _targets.get(invid);
-        if (rsp == null) {
+        if (rsptarg == null) {
             Log.warning("No target for invocation response " +
                         "[rsp=" + mevt + "].");
             return true;
@@ -135,53 +139,27 @@ public class InvocationManager
         System.arraycopy(args, 2, rargs, 0, rargs.length);
 
         // and invoke the response method
-        Method rspmeth = getResponseMethod(name, target, rargs);
+        String mname = "handle" + name;
-        if (rspmeth != null) {
+        Method rspmeth = ClassUtil.getMethod(mname, rsptarg, _methcache);
-            try {
+        if (rspmeth == null) {
-                rspmeth.invoke(target, rargs);
+            Log.warning("Unable to resolve response method " +
-            } catch (Exception e) {
+                        "[target=" + rsptarg.getClass().getName() +
-                Log.warning("Error invoking response target method " +
+                        ", method=" + mname + "].");
-                            "[target=" + target + ", method=" + rspmeth +
+            return true;
-                            ", error=" + e + "].");
+        }
-            }
+
+        // and invoke it
+        try {
+            rspmeth.invoke(rsptarg, rargs);
+        } catch (Exception e) {
+            Log.warning("Error invoking response target method " +
+                        "[target=" + rsptarg + ", method=" + rspmeth +
+                        ", error=" + e + "].");
         }
 
         return true;
     }
 
-    protected Method getResponseMethod (String name, Object target,
-                                        Object[] args)
-    {
-        Class tclass = target.getClass();
-        String key = tclass.getName() + ":" + name;
-        Method method = (Method)_methcache.get(key);
-
-        if (method == null) {
-            String methname = "handle" + name;
-            method = findMethod(tclass, name);
-            if (method == null) {
-                Log.warning("Unable to locate method on response target " +
-                            "[rtclass=" + tclass.getName() +
-                            ", method=" + methname + "].");
-                return null;
-            }
-            _methcache.put(key, method);
-        }
-
-        return method;
-    }
-
-    protected static Method findMethod (Class clazz, String name)
-    {
-        Method[] methods = clazz.getMethods();
-        for (int i = 0; i < methods.length; i++) {
-            if  (methods[i].getName().equals(name)) {
-                return methods[i];
-            }
-        }
-        return null;
-    }
-
     protected synchronized int nextInvocationId ()
     {
         return _invocationId++;

src/java/com/threerings/presents/net/AuthResponse.java

@@ -1,5 +1,5 @@
 //
-// $Id: AuthResponse.java,v 1.6 2001/06/11 17:42:20 mdb Exp $
+// $Id: AuthResponse.java,v 1.7 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.net;
 
@@ -30,7 +30,7 @@ public class AuthResponse extends DownstreamMessage
     }
 
     /**
-     * Constructs a auth response with the supplied credentials.
+     * Constructs a auth response with the supplied response data.
      */
     public AuthResponse (AuthResponseData data)
     {

src/java/com/threerings/presents/net/AuthResponseData.java

@@ -1,12 +1,8 @@
 //
-// $Id: AuthResponseData.java,v 1.5 2001/07/19 05:56:20 mdb Exp $
+// $Id: AuthResponseData.java,v 1.6 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.net;
 
-import java.io.IOException;
-import java.io.DataInputStream;
-import java.io.DataOutputStream;
-
 import com.threerings.cocktail.cher.dobj.DObject;
 
 /**
@@ -23,12 +19,6 @@ public class AuthResponseData extends DObject
      */
     public String code;
 
-    /** The oid of this client's associated distributed object. */
-    public int clientOid;
-
-    /** The oid to which to send invocation requests. */
-    public int invOid;
-
     public String toString ()
     {
         return "[code=" + code + "]";

src/java/com/threerings/presents/net/BootstrapData.java

@@ -0,0 +1,26 @@
+//
+// $Id: BootstrapData.java,v 1.1 2001/07/19 07:09:16 mdb Exp $
+
+package com.threerings.cocktail.cher.net;
+
+import com.threerings.cocktail.cher.dobj.DObject;
+
+/**
+ * An <code>BootstrapData</code> object is communicated back to the client
+ * after authentication has succeeded and after the server is fully
+ * prepared to deal with the client. It contains information the client
+ * will need to interact with the server.
+ */
+public class BootstrapData extends DObject
+{
+    /** The oid of this client's associated distributed object. */
+    public int clientOid;
+
+    /** The oid to which to send invocation requests. */
+    public int invOid;
+
+    public String toString ()
+    {
+        return "[clientOid=" + clientOid + ", invOid=" + invOid + "]";
+    }
+}

src/java/com/threerings/presents/net/BootstrapNotification.java

@@ -0,0 +1,67 @@
+//
+// $Id: BootstrapNotification.java,v 1.1 2001/07/19 07:09:16 mdb Exp $
+
+package com.threerings.cocktail.cher.net;
+
+import java.io.IOException;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+
+import com.threerings.cocktail.cher.dobj.io.DObjectFactory;
+
+/**
+ * A bootstrap notification is delivered to the client once the server has
+ * fully initialized itself in preparation for dealing with this client.
+ * The authentication process completes very early and further information
+ * need be communicated to the client so that it can fully interact with
+ * the server. This information is communicated via the bootstrap
+ * notification.
+ */
+public class BootstrapNotification extends DownstreamMessage
+{
+    /** The code for a bootstrap notification. */
+    public static final short TYPE = TYPE_BASE + 1;
+
+    /**
+     * Zero argument constructor used when unserializing an instance.
+     */
+    public BootstrapNotification ()
+    {
+        super();
+    }
+
+    /**
+     * Constructs an bootstrap notification with the supplied data.
+     */
+    public BootstrapNotification (BootstrapData data)
+    {
+        _data = data;
+    }
+
+    public short getType ()
+    {
+        return TYPE;
+    }
+
+    public BootstrapData getData ()
+    {
+        return _data;
+    }
+
+    public void writeTo (DataOutputStream out)
+        throws IOException
+    {
+        super.writeTo(out);
+        DObjectFactory.writeTo(out, _data);
+    }
+
+    public void readFrom (DataInputStream in)
+        throws IOException
+    {
+        super.readFrom(in);
+        _data = (BootstrapData)DObjectFactory.readFrom(in);
+    }
+
+    /** The data associated with this notification. */
+    protected BootstrapData _data;
+}

src/java/com/threerings/presents/net/EventNotification.java

@@ -1,5 +1,5 @@
 //
-// $Id: EventNotification.java,v 1.7 2001/06/11 17:44:04 mdb Exp $
+// $Id: EventNotification.java,v 1.8 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.net;
 
@@ -13,7 +13,7 @@ import com.threerings.cocktail.cher.io.TypedObjectFactory;
 public class EventNotification extends DownstreamMessage
 {
     /** The code for an event notification. */
-    public static final short TYPE = TYPE_BASE + 1;
+    public static final short TYPE = TYPE_BASE + 2;
 
     /**
      * Zero argument constructor used when unserializing an instance.

src/java/com/threerings/presents/net/FailureResponse.java

@@ -1,5 +1,5 @@
 //
-// $Id: FailureResponse.java,v 1.4 2001/06/09 23:39:04 mdb Exp $
+// $Id: FailureResponse.java,v 1.5 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.net;
 
@@ -9,7 +9,7 @@ import java.io.DataOutputStream;
 
 public class FailureResponse extends DownstreamMessage
 {
-    /** The code for a logoff notification. */
+    /** The code for a failure notification. */
     public static final short TYPE = TYPE_BASE + 4;
 
     /**

src/java/com/threerings/presents/net/ObjectResponse.java

@@ -1,5 +1,5 @@
 //
-// $Id: ObjectResponse.java,v 1.8 2001/06/11 17:42:20 mdb Exp $
+// $Id: ObjectResponse.java,v 1.9 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.net;
 
@@ -13,7 +13,7 @@ import com.threerings.cocktail.cher.dobj.io.DObjectFactory;
 public class ObjectResponse extends DownstreamMessage
 {
     /** The code for an object repsonse. */
-    public static final short TYPE = TYPE_BASE + 2;
+    public static final short TYPE = TYPE_BASE + 3;
 
     /**
      * Zero argument constructor used when unserializing an instance.

src/java/com/threerings/presents/server/InvocationManager.java

@@ -1,10 +1,15 @@
 //
-// $Id: InvocationManager.java,v 1.1 2001/07/19 05:56:20 mdb Exp $
+// $Id: InvocationManager.java,v 1.2 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.server;
 
+import java.lang.reflect.Method;
+import java.util.HashMap;
+
 import com.threerings.cocktail.cher.Log;
 import com.threerings.cocktail.cher.dobj.*;
+import com.threerings.cocktail.cher.data.*;
+import com.threerings.cocktail.cher.util.ClassUtil;
 
 /**
  * The invocation services provide client to server invocations (service
@@ -22,7 +27,7 @@ import com.threerings.cocktail.cher.dobj.*;
  *
  * <p> The server invocation manager listens for invocation requests from
  * the client and passes them on to the invocation provider registered for
- * the requested invocation type. It also provides a mechanism by which
+ * the requested invocation module. It also provides a mechanism by which
  * responses and asynchronous notification invocations can be delivered to
  * the client.
  */
@@ -42,6 +47,15 @@ public class InvocationManager
         return _invoid;
     }
 
+    /**
+     * Registers the supplied invocation provider instance as the handler
+     * for all invocation requests for the specified module.
+     */
+    public void registerProvider (String module, Object provider)
+    {
+        _providers.put(module, provider);
+    }
+
     public void objectAvailable (DObject object)
     {
         // this must be our invocation object
@@ -66,12 +80,54 @@ public class InvocationManager
             return true;
         }
 
-        MessageEvent mevt = (MessageEvent)event;
         // make sure the name is proper just for sanities sake
+        MessageEvent mevt = (MessageEvent)event;
+        if (!mevt.getName().equals(InvocationObject.MESSAGE_NAME)) {
+            return true;
+        }
+
+        // we've got an invocation request, so we process it
+        Object[] args = mevt.getArgs();
+        String module = (String)args[0];
+        String procedure = (String)args[1];
+        int invid = ((Integer)args[2]).intValue();
+
+        // locate a provider for this module
+        Object provider = _providers.get(module);
+        if (provider == null) {
+            Log.warning("No provider registered for invocation request " +
+                        "[evt=" + mevt + "].");
+            return true;
+        }
+
+        // prune the method arguments from the full message arguments
+        Object[] margs = new Object[args.length-3];
+        System.arraycopy(args, 3, margs, 0, margs.length);
+
+        // look up the method that will handle this procedure
+        String mname = "handle" + procedure + "Request";
+        Method procmeth = ClassUtil.getMethod(mname, provider, _methcache);
+        if (procmeth == null) {
+            Log.warning("Unable to resolve provider procedure " +
+                        "[provider=" + provider.getClass().getName() +
+                        ", method=" + mname + "].");
+            return true;
+        }
+
+        // and invoke it
+        try {
+            procmeth.invoke(provider, margs);
+        } catch (Exception e) {
+            Log.warning("Error invoking invocation procedure " +
+                        "[provider=" + provider + ", method=" + procmeth +
+                        ", error=" + e + "].");
+        }
 
         return true;
     }
 
     protected DObjectManager _omgr;
     protected int _invoid;
+    protected HashMap _providers = new HashMap();
+    protected HashMap _methcache = new HashMap();
 }

src/java/com/threerings/presents/server/PresentsClient.java

@@ -1,5 +1,5 @@
 //
-// $Id: PresentsClient.java,v 1.4 2001/06/11 17:44:04 mdb Exp $
+// $Id: PresentsClient.java,v 1.5 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.server;
 
@@ -7,6 +7,7 @@ import java.io.IOException;
 import java.util.HashMap;
 
 import com.threerings.cocktail.cher.Log;
+import com.threerings.cocktail.cher.data.ClientObject;
 import com.threerings.cocktail.cher.dobj.*;
 import com.threerings.cocktail.cher.net.*;
 import com.threerings.cocktail.cher.server.net.*;
@@ -36,6 +37,30 @@ public class Client implements Subscriber, MessageHandler
         _cmgr = cmgr;
         _username = username;
         setConnection(conn);
+
+        // create our client object and bootstrap the client once we've
+        // got it
+        Subscriber sub = new Subscriber ()
+        {
+            public void objectAvailable (DObject object)
+            {
+                setClientObject((ClientObject)object);
+                sendBootstrap();
+            }
+
+            public void requestFailed (int oid, ObjectAccessException cause)
+            {
+                Log.warning("Unable to create client object " +
+                            "[client=" + Client.this +
+                            ", error=" + cause + "].");
+            }
+
+            public boolean handleEvent (DEvent event, DObject target)
+            {
+                return false;
+            }
+        };
+        CherServer.omgr.createObject(ClientObject.class, this, false);
     }
 
     /**
@@ -68,9 +93,59 @@ public class Client implements Subscriber, MessageHandler
         // start using the new connection
         setConnection(conn);
 
+        // send off a bootstrap notification immediately because we've
+        // already got our client object
+        sendBootstrap();
+
         Log.info("Session resumed [client=" + this + "].");
     }
 
+    protected void setClientObject (ClientObject clobj)
+    {
+        // keep track of this for later
+        _clobj = clobj;
+    }
+
+    /**
+     * This is called once we have a handle on the client distributed
+     * object. It sends a bootstrap notification to the client with all
+     * the information it will need to interact with the server.
+     */
+    protected void sendBootstrap ()
+    {
+        // create and populate our bootstrap data
+        BootstrapData data = createBootstrapData();
+        populateBootstrapData(data);
+
+        // create a send bootstrap notification
+        _conn.postMessage(new BootstrapNotification(data));
+    }
+
+    /**
+     * Derived client classes can override this member to create derived
+     * bootstrap data classes that contain extra bootstrap information, if
+     * desired.
+     */
+    protected BootstrapData createBootstrapData ()
+    {
+        return new BootstrapData();
+    }
+
+    /**
+     * Derived client classes can override this member to populate the
+     * bootstrap data with additional information. They should be sure to
+     * call <code>super.populateBootstrapData()</code> before doing their
+     * own populating, however.
+     */
+    protected void populateBootstrapData (BootstrapData data)
+    {
+        // give them the client object id
+        data.clientOid = _clobj.getOid();
+
+        // give them the invocation oid
+        data.invOid = CherServer.invmgr.getOid();
+    }
+
     /**
      * Called by the connection manager when this client's connection
      * fails. This is invoked on the conmgr thread, and should behave
@@ -269,6 +344,7 @@ public class Client implements Subscriber, MessageHandler
     protected ClientManager _cmgr;
     protected String _username;
     protected Connection _conn;
+    protected ClientObject _clobj;
 
     protected static HashMap _disps = new HashMap();
 

src/java/com/threerings/presents/server/PresentsServer.java

@@ -1,5 +1,5 @@
 //
-// $Id: PresentsServer.java,v 1.5 2001/06/09 23:39:04 mdb Exp $
+// $Id: PresentsServer.java,v 1.6 2001/07/19 07:09:16 mdb Exp $
 
 package com.threerings.cocktail.cher.server;
 
@@ -28,6 +28,9 @@ public class CherServer
     /** The distributed object manager. */
     public static DObjectManager omgr;
 
+    /** The invocation manager. */
+    public static InvocationManager invmgr;
+
     /**
      * Initializes all of the server services and prepares for operation.
      */
@@ -42,6 +45,8 @@ public class CherServer
             clmgr = new ClientManager(conmgr);
             // create our distributed object manager
             omgr = new CherDObjectMgr();
+            // create our invocation manager
+            invmgr = new InvocationManager(omgr);
 
             // create an object for testing
             omgr.createObject(TestObject.class, null, false);

src/java/com/threerings/presents/util/ClassUtil.java

@@ -0,0 +1,57 @@
+//
+// $Id: ClassUtil.java,v 1.1 2001/07/19 07:09:16 mdb Exp $
+
+package com.threerings.cocktail.cher.util;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+
+/**
+ * Class related utility functions.
+ */
+public class ClassUtil
+{
+    /**
+     * Locates and returns teh first method in the supplied class whose
+     * name is equal to the specified name. If a method is located, it
+     * will be cached in the supplied cache so that subsequent requests
+     * will immediately return the method from the cache rather than
+     * re-reflecting.
+     *
+     * @return the method with the specified name or null if no method
+     * with that name could be found.
+     */
+    public static Method getMethod (String name, Object target, HashMap cache)
+    {
+        Class tclass = target.getClass();
+        String key = tclass.getName() + ":" + name;
+        Method method = (Method)cache.get(key);
+
+        if (method == null) {
+            method = findMethod(tclass, name);
+            if (method != null) {
+                cache.put(key, method);
+            }
+        }
+
+        return method;
+    }
+
+    /**
+     * Locates and returns the first method in the supplied class whose
+     * name is equal to the specified name.
+     *
+     * @return the method with the specified name or null if no method
+     * with that name could be found.
+     */
+    public static Method findMethod (Class clazz, String name)
+    {
+        Method[] methods = clazz.getMethods();
+        for (int i = 0; i < methods.length; i++) {
+            if  (methods[i].getName().equals(name)) {
+                return methods[i];
+            }
+        }
+        return null;
+    }
+}