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// -*- mode: c++; c-basic-offset:4 -*-
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// This file is part of libdap, A C++ implementation of the OPeNDAP Data
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// Access Protocol.
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// Copyright (c) 2002,2003 OPeNDAP, Inc.
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// Author: James Gallagher <jgallagher@opendap.org>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
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#ifndef event_handler_h
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#define event_handler_h
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#include <iostream>
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namespace libdap
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{
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/** An abstract class which provides a hook method used by SignalHandler.
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Based on "Applying Design Patterns to Simplify Signal Handling", Douglas
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C. Schmidt, 1998, http://www.cs.wustl.edu/~schmidt/signal-patterns.html.
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@see SignalHandler
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@see AlarmHandler
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@author James Gallagher <jgallagher@opendap.org> */
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class EventHandler
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{
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public:
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/** Hook method for SignalHandler. If a concrete instance of this class
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is registered with SignalHandler, this method will be called when \c
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signum is received. */
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virtual void handle_signal(int signum) = 0;
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/** We don't need a destructor, but including one might stave off an
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error later on... */
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virtual ~EventHandler()
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{}
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};
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#if 0
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// moved to SignalHandlerTest jhrg 4/26/13
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/** Test Handler. This is used with the SignalHandlerTest unit tests. */
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class TestHandler : public EventHandler
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{
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public:
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int flag;
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TestHandler() : flag(0)
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{}
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virtual void handle_signal(int ) {
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flag = 1;
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}
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};
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#endif
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} // namespace libdap
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#endif // event_handler_h
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