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c6fd0db4b6
Cherry-picked from https://github.com/ClickHouse/poco/pull/28, see the mentioned PR for more details. Co-authored-by: alexey-milovidov <milovidov@yandex-team.ru>
132 lines
3.2 KiB
C++
132 lines
3.2 KiB
C++
//
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// TCPServerDispatcher.h
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//
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// Library: Net
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// Package: TCPServer
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// Module: TCPServerDispatcher
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//
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// Definition of the TCPServerDispatcher class.
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//
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// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Net_TCPServerDispatcher_INCLUDED
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#define Net_TCPServerDispatcher_INCLUDED
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#include "Poco/Net/Net.h"
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#include "Poco/Net/StreamSocket.h"
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#include "Poco/Net/TCPServerConnectionFactory.h"
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#include "Poco/Net/TCPServerParams.h"
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#include "Poco/Runnable.h"
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#include "Poco/NotificationQueue.h"
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#include "Poco/ThreadPool.h"
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#include "Poco/Mutex.h"
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#include <atomic>
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namespace Poco {
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namespace Net {
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class Net_API TCPServerDispatcher: public Poco::Runnable
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/// A helper class for TCPServer that dispatches
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/// connections to server connection threads.
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{
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public:
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TCPServerDispatcher(TCPServerConnectionFactory::Ptr pFactory, Poco::ThreadPool& threadPool, TCPServerParams::Ptr pParams);
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/// Creates the TCPServerDispatcher.
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///
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/// The dispatcher takes ownership of the TCPServerParams object.
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/// If no TCPServerParams object is supplied, the TCPServerDispatcher
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/// creates one.
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void duplicate();
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/// Increments the object's reference count.
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void release();
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/// Decrements the object's reference count
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/// and deletes the object if the count
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/// reaches zero.
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void run();
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/// Runs the dispatcher.
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void enqueue(const StreamSocket& socket);
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/// Queues the given socket connection.
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void stop();
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/// Stops the dispatcher.
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int currentThreads() const;
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/// Returns the number of currently used threads.
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int maxThreads() const;
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/// Returns the maximum number of threads available.
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int totalConnections() const;
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/// Returns the total number of handled connections.
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int currentConnections() const;
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/// Returns the number of currently handled connections.
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int maxConcurrentConnections() const;
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/// Returns the maximum number of concurrently handled connections.
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int queuedConnections() const;
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/// Returns the number of queued connections.
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int refusedConnections() const;
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/// Returns the number of refused connections.
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const TCPServerParams& params() const;
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/// Returns a const reference to the TCPServerParam object.
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protected:
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~TCPServerDispatcher();
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/// Destroys the TCPServerDispatcher.
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void beginConnection();
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/// Updates the performance counters.
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void endConnection();
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/// Updates the performance counters.
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private:
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TCPServerDispatcher();
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TCPServerDispatcher(const TCPServerDispatcher&);
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TCPServerDispatcher& operator = (const TCPServerDispatcher&);
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std::atomic<int> _rc;
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TCPServerParams::Ptr _pParams;
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std::atomic<int> _currentThreads;
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std::atomic<int> _totalConnections;
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std::atomic<int> _currentConnections;
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std::atomic<int> _maxConcurrentConnections;
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std::atomic<int> _refusedConnections;
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std::atomic<bool> _stopped;
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Poco::NotificationQueue _queue;
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TCPServerConnectionFactory::Ptr _pConnectionFactory;
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Poco::ThreadPool& _threadPool;
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mutable Poco::FastMutex _mutex;
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};
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//
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// inlines
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//
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inline const TCPServerParams& TCPServerDispatcher::params() const
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{
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return *_pParams;
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}
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} } // namespace Poco::Net
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#endif // Net_TCPServerDispatcher_INCLUDED
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