--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sun/net/www/httptest/AbstractCallback.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2002 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import java.net.*;
+import java.util.*;
+import java.io.IOException;
+
+/**
+ * This class provides a partial implementation of the HttpCallback
+ * interface. Use this class if you want to use the requestURI as a means
+ * of tracking multiple invocations of a request (on the server).
+ * In this case, you implement the modified request() method, which includes
+ * an integer count parameter. This parameter indicates the number of times
+ * (starting at zero) the request URI has been received.
+ */
+
+public abstract class AbstractCallback implements HttpCallback {
+
+    Map requests;
+
+    static class Request {
+        URI uri;
+        int count;
+
+        Request (URI u) {
+            uri = u;
+            count = 0;
+        }
+    }
+
+    AbstractCallback () {
+        requests = Collections.synchronizedMap (new HashMap());
+    }
+
+    /**
+     * handle the given request and generate an appropriate response.
+     * @param msg the transaction containing the request from the
+     *        client and used to send the response
+     */
+    public void request (HttpTransaction msg) {
+        URI uri = msg.getRequestURI();
+        Request req = (Request) requests.get (uri);
+        if (req == null) {
+            req = new Request (uri);
+            requests.put (uri, req);
+        }
+        request (msg, req.count++);
+    }
+
+    /**
+     * Same as HttpCallback interface except that the integer n
+     * is provided to indicate sequencing of repeated requests using
+     * the same request URI. n starts at zero and is incremented
+     * for each successive call.
+     *
+     * @param msg the transaction containing the request from the
+     *        client and used to send the response
+     * @param n value is 0 at first call, and is incremented by 1 for
+     *        each subsequent call using the same request URI.
+     */
+    abstract public void request (HttpTransaction msg, int n);
+}