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/*
* 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);
}
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