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/* Copyright (C) 2013 BMW Group
* Author: Manfred Bathelt (manfred.bathelt@bmw.de)
* Author: Juergen Gehring (juergen.gehring@bmw.de)
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if !defined (COMMONAPI_INTERNAL_COMPILATION)
#error "Only <CommonAPI/CommonAPI.h> can be included directly, this file may disappear or change contents."
#endif
#ifndef COMMONAPI_SELECTIVE_EVENT_H_
#define COMMONAPI_SELECTIVE_EVENT_H_
#include "Event.h"
namespace CommonAPI {
template<typename ... _Arguments>
class SelectiveEvent: public Event<_Arguments...> {
public:
typedef typename Event<_Arguments...>::Listener Listener;
typedef typename Event<_Arguments...>::Subscription Subscription;
virtual ~SelectiveEvent() {
}
Subscription subscribe(Listener listener) {
// just delegate
bool success;
return subscribe(listener, success);
}
/**
* \brief Subscribe a listener to this event and be notified of success
*
* Subscribe a listener to this event and be notified of success via the passed reference.
* ATTENTION: You should not build new proxies or register services in callbacks
* from events. This can cause a deadlock or assert. Instead, you should set a
* trigger for your application to do this on the next iteration of your event loop
* if needed. The preferred solution is to build all proxies you need at the
* beginning and react to events appropriatly for each.
*
* @param listener A listener to be added
* @param success Indicates whether subscription was accepted
* @return A token identifying this subscription
*/
virtual Subscription subscribe(Listener listener, bool& success) = 0;
};
} // namespace CommonAPI
#endif
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