| /* |
| * Copyright (c) 2002, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.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); |
| } |