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