mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-29 19:12:03 +00:00
b79ead9c84
* Replicate poco into base/poco/ * De-register poco submodule * Build poco from ClickHouse * Exclude poco from stylecheck * Exclude poco from whitespace check * Exclude poco from typo check * Remove x bit from sources/headers (the style check complained) * Exclude poco from duplicate include check * Fix fasttest * Remove contrib/poco-cmake/* * Simplify poco build descriptions * Remove poco stuff not used by ClickHouse * Glob poco sources * Exclude poco from clang-tidy
127 lines
2.5 KiB
C++
127 lines
2.5 KiB
C++
//
|
|
// NObserver.h
|
|
//
|
|
// Library: Foundation
|
|
// Package: Notifications
|
|
// Module: NotificationCenter
|
|
//
|
|
// Definition of the NObserver class template.
|
|
//
|
|
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_NObserver_INCLUDED
|
|
#define Foundation_NObserver_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/AbstractObserver.h"
|
|
#include "Poco/Mutex.h"
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
template <class C, class N>
|
|
class NObserver: public AbstractObserver
|
|
/// This template class implements an adapter that sits between
|
|
/// a NotificationCenter and an object receiving notifications
|
|
/// from it. It is quite similar in concept to the
|
|
/// RunnableAdapter, but provides some NotificationCenter
|
|
/// specific additional methods.
|
|
/// See the NotificationCenter class for information on how
|
|
/// to use this template class.
|
|
///
|
|
/// This class template is quite similar to the Observer class
|
|
/// template. The only difference is that the NObserver
|
|
/// expects the callback function to accept a const AutoPtr&
|
|
/// instead of a plain pointer as argument, thus simplifying memory
|
|
/// management.
|
|
{
|
|
public:
|
|
typedef AutoPtr<N> NotificationPtr;
|
|
typedef void (C::*Callback)(const NotificationPtr&);
|
|
|
|
NObserver(C& object, Callback method):
|
|
_pObject(&object),
|
|
_method(method)
|
|
{
|
|
}
|
|
|
|
NObserver(const NObserver& observer):
|
|
AbstractObserver(observer),
|
|
_pObject(observer._pObject),
|
|
_method(observer._method)
|
|
{
|
|
}
|
|
|
|
~NObserver()
|
|
{
|
|
}
|
|
|
|
NObserver& operator = (const NObserver& observer)
|
|
{
|
|
if (&observer != this)
|
|
{
|
|
_pObject = observer._pObject;
|
|
_method = observer._method;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
void notify(Notification* pNf) const
|
|
{
|
|
Poco::Mutex::ScopedLock lock(_mutex);
|
|
|
|
if (_pObject)
|
|
{
|
|
N* pCastNf = dynamic_cast<N*>(pNf);
|
|
if (pCastNf)
|
|
{
|
|
NotificationPtr ptr(pCastNf, true);
|
|
(_pObject->*_method)(ptr);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool equals(const AbstractObserver& abstractObserver) const
|
|
{
|
|
const NObserver* pObs = dynamic_cast<const NObserver*>(&abstractObserver);
|
|
return pObs && pObs->_pObject == _pObject && pObs->_method == _method;
|
|
}
|
|
|
|
bool accepts(Notification* pNf) const
|
|
{
|
|
return dynamic_cast<N*>(pNf) != 0;
|
|
}
|
|
|
|
AbstractObserver* clone() const
|
|
{
|
|
return new NObserver(*this);
|
|
}
|
|
|
|
void disable()
|
|
{
|
|
Poco::Mutex::ScopedLock lock(_mutex);
|
|
|
|
_pObject = 0;
|
|
}
|
|
|
|
private:
|
|
NObserver();
|
|
|
|
C* _pObject;
|
|
Callback _method;
|
|
mutable Poco::Mutex _mutex;
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_NObserver_INCLUDED
|