/usr/include/omniEvents/ProxyPullConsumer.h is in libomnievents-dev 1:2.6.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// ProxyPullCOnsumer.h Created : 2003/12/04
// Author : Alex Tingle
//
// Copyright (C) 2003-2005 Alex Tingle.
//
// This file is part of the omniEvents application.
//
// omniEvents is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// omniEvents 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
#ifndef OMNIEVENTS__PROXYPULLCONSUMER_H
#define OMNIEVENTS__PROXYPULLCONSUMER_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <list>
#ifdef HAVE_IOSTREAM
# include <iostream>
#else
# include <iostream.h>
#endif
#include "ProxyManager.h"
#include "CosEventChannelAdmin.hh"
#ifdef HAVE_STD_IOSTREAM
using namespace std;
#endif
namespace OmniEvents {
class ProxyPullConsumerManager
: public ProxyManager,
public PortableServer::RefCountServantBase
{
public: // CORBA interface methods
PortableServer::Servant incarnate(
const PortableServer::ObjectId& oid,
PortableServer::POA_ptr poa
);
public:
ProxyPullConsumerManager(
PortableServer::POA_ptr parentPoa,
list<CORBA::Any*>& q
);
~ProxyPullConsumerManager();
OMNIEVENTS__DEBUG_REF_COUNTS__DECL
CosEventChannelAdmin::ProxyPullConsumer_ptr createObject();
/** Collects events that have arrived at connected proxies. For each proxy:
*
* - If an exception has arrived, increment the exception count, and switch
* to the other operation (pull/try_pull).
* - If the exception count is 4+, then deactivate this object.
* - If a method has returned, then decide whether we have an event (hasEvent).
* If so, the read the event and push it onto the queue.
*
* Should be called BEFORE triggerRequest().
*/
void collect();
/** For each connected proxy, if there is no request in progress, send a new
* request to the current operation (pull or try_pull).
* Should be called AFTER collect().
*/
void triggerRequest();
/** Send disconnect_pull_supplier() to all connected PullSuppliers. */
void disconnect();
private:
list<CORBA::Any*>& _queue;
};
/** Implementation of the ProxyPullConsumer interface. Tries to get messages by
* using pull() then try_pull() method calls, but prefers pull(). Switches
* between pull() & try_pull() if it gets an exception. Only gives up when both
* methods have returned two consecutive exceptions.
*
* Note, our own implementation of ProxyPullSupplier::pull() is very basic.
*/
class ProxyPullConsumer_i
: public virtual POA_CosEventChannelAdmin::ProxyPullConsumer,
public Proxy
{
public: // CORBA interface methods
void connect_pull_supplier(CosEventComm::PullSupplier_ptr pullSupplier);
void disconnect_pull_consumer();
public:
ProxyPullConsumer_i(PortableServer::POA_ptr poa, list<CORBA::Any*>& q);
~ProxyPullConsumer_i();
/** Collects responses since the last trigger. */
void collect();
/** When _req is NIL, sends out a new pull() or try_pull() call. */
void triggerRequest();
void reincarnate(const string& oid, const PersistNode& node);
void output(ostream& os);
private:
CosEventComm::PullSupplier_var _target;
list<CORBA::Any*>& _queue;
/** This proxy can call out in either pull() or try_pull() mode. */
enum Mode { Pull=0, TryPull=1 };
Mode _mode;
/** Only when two consecutive exceptions have been received from each mode,
* do we consider the connection dead.
*/
int _exceptionCount;
};
}; // end namespace OmniEvents
#endif // OMNIEVENTS__PROXYPULLCONSUMER_H
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