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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_DBUS_DBUS_SELECTIVE_EVENT_H_
#define COMMONAPI_DBUS_DBUS_SELECTIVE_EVENT_H_
#include "DBusEvent.h"
namespace CommonAPI {
namespace DBus {
template<typename _EventType, typename _DBusProxy = DBusProxyBase>
class DBusSelectiveEvent: public DBusEvent<_EventType, _DBusProxy> {
public:
typedef typename DBusEvent<_EventType, _DBusProxy>::CancellableListener CancellableListener;
typedef DBusEvent<_EventType, _DBusProxy> DBusEventBase;
DBusSelectiveEvent(DBusProxy& associatedDbusProxy,
const char* eventName,
const char* eventSignature) :
DBusEventBase(associatedDbusProxy, eventName, eventSignature),
associatedDbusProxy_(associatedDbusProxy) {
}
DBusSelectiveEvent(DBusProxy& associatedDbusProxy, const char* eventName,
const char* eventSignature,
const char* objPath,
const char* interfaceName) :
DBusEvent<_EventType, _DBusProxy>(
associatedDbusProxy,
eventName,
eventSignature,
objPath,
interfaceName),
associatedDbusProxy_(associatedDbusProxy) {
}
virtual ~DBusSelectiveEvent() { }
typename _EventType::Subscription subscribe(typename _EventType::Listener listener, bool& success) {
DBusEventBase::listenerListMutex_.lock();
const bool firstListenerAdded = DBusEventBase::listenersList_.empty();
typename _EventType::CancellableListenerWrapper wrappedListener(std::move(listener));
DBusEventBase::listenersList_.emplace_front(std::move(wrappedListener));
typename _EventType::Subscription listenerSubscription = DBusEventBase::listenersList_.begin();
success = true;
DBusProxyConnection::DBusSignalHandlerToken dbusSignalHandlerToken;
if (firstListenerAdded) {
dbusSignalHandlerToken = associatedDbusProxy_.subscribeForSelectiveBroadcastOnConnection(
success,
DBusEventBase::objectPath_,
DBusEventBase::interfaceName_,
DBusEventBase::eventName_,
DBusEventBase::eventSignature_,
this
);
}
if (success) {
// actually add subscription
DBusEventBase::subscription_ = dbusSignalHandlerToken;
this->onListenerAdded(*listenerSubscription);
}
else {
DBusEventBase::listenersList_.erase(listenerSubscription);
listenerSubscription = DBusEventBase::listenersList_.end();
}
DBusEventBase::listenerListMutex_.unlock();
return listenerSubscription;
}
protected:
virtual void onLastListenerRemoved(const CancellableListener&) {
associatedDbusProxy_.unsubscribeFromSelectiveBroadcast(
DBusEventBase::eventName_,
DBusEventBase::subscription_,
this);
}
private:
DBusProxy& associatedDbusProxy_;
};
} // namespace DBus
} // namespace CommonAPI
#endif // COMMONAPI_DBUS_DBUS_SELECTIVE_EVENT_H_
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