/usr/include/Poco/Net/TCPServer.h is in libpoco-dev 1.3.6p1-5+deb8u1.
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// TCPServer.h
//
// $Id: //poco/1.3/Net/include/Poco/Net/TCPServer.h#4 $
//
// Library: Net
// Package: TCPServer
// Module: TCPServer
//
// Definition of the TCPServer class.
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#ifndef Net_TCPServer_INCLUDED
#define Net_TCPServer_INCLUDED
#include "Poco/Net/Net.h"
#include "Poco/Net/ServerSocket.h"
#include "Poco/Net/TCPServerConnectionFactory.h"
#include "Poco/Net/TCPServerParams.h"
#include "Poco/Runnable.h"
#include "Poco/Thread.h"
#include "Poco/ThreadPool.h"
namespace Poco {
namespace Net {
class TCPServerDispatcher;
class Net_API TCPServer: public Poco::Runnable
/// This class implements a multithreaded TCP server.
///
/// The server uses a ServerSocket to listen for incoming
/// connections. The ServerSocket must have been bound to
/// an address before it is passed to the TCPServer constructor.
/// Additionally, the ServerSocket must be put into listening
/// state before the TCPServer is started by calling the start()
/// method.
///
/// The server uses a thread pool to assign threads to incoming
/// connections. Before incoming connections are assigned to
/// a connection thread, they are put into a queue.
/// Connection threads fetch new connections from the queue as soon
/// as they become free. Thus, a connection thread may serve more
/// than one connection.
///
/// As soon as a connection thread fetches the next connection from
/// the queue, it creates a TCPServerConnection object for it
/// (using the TCPServerConnectionFactory passed to the constructor)
/// and calls the TCPServerConnection's start() method. When the
/// start() method returns, the connection object is deleted.
///
/// The number of connection threads is adjusted dynamically, depending
/// on the number of connections waiting to be served.
///
/// It is possible to specify a maximum number of queued connections.
/// This prevents the connection queue from overflowing in the
/// case of an extreme server load. In such a case, connections that
/// cannot be queued are silently and immediately closed.
///
/// TCPServer uses a separate thread to accept incoming connections.
/// Thus, the call to start() returns immediately, and the server
/// continues to run in the background.
///
/// To stop the server from accepting new connections, call stop().
///
/// After calling stop(), no new connections will be accepted and
/// all queued connections will be discarded.
/// Already served connections, however, will continue being served.
{
public:
TCPServer(TCPServerConnectionFactory::Ptr pFactory, const ServerSocket& socket, TCPServerParams::Ptr pParams = 0);
/// Creates the TCPServer, using the given ServerSocket.
///
/// The server takes ownership of the TCPServerConnectionFactory
/// and deletes it when it's no longer needed.
///
/// The server also takes ownership of the TCPServerParams object.
/// If no TCPServerParams object is given, the server's TCPServerDispatcher
/// creates its own one.
///
/// News threads are taken from the default thread pool.
TCPServer(TCPServerConnectionFactory::Ptr pFactory, Poco::ThreadPool& threadPool, const ServerSocket& socket, TCPServerParams::Ptr pParams = 0);
/// Creates the TCPServer, using the given ServerSocket.
///
/// The server takes ownership of the TCPServerConnectionFactory
/// and deletes it when it's no longer needed.
///
/// The server also takes ownership of the TCPServerParams object.
/// If no TCPServerParams object is given, the server's TCPServerDispatcher
/// creates its own one.
///
/// News threads are taken from the given thread pool.
virtual ~TCPServer();
/// Destroys the TCPServer and its TCPServerConnectionFactory.
const TCPServerParams& params() const;
/// Returns a const reference to the TCPServerParam object
/// used by the server's TCPServerDispatcher.
void start();
/// Starts the server. A new thread will be
/// created that waits for and accepts incoming
/// connections.
///
/// Before start() is called, the ServerSocket passed to
/// TCPServer must have been bound and put into listening state.
void stop();
/// Stops the server.
///
/// No new connections will be accepted.
/// Already handled connections will continue to be served.
///
/// Once the server is stopped, it cannot be restarted.
int currentThreads() const;
/// Returns the number of currently used connection threads.
int totalConnections() const;
/// Returns the total number of handled connections.
int currentConnections() const;
/// Returns the number of currently handled connections.
int maxConcurrentConnections() const;
/// Returns the maximum number of concurrently handled connections.
int queuedConnections() const;
/// Returns the number of queued connections.
int refusedConnections() const;
/// Returns the number of refused connections.
Poco::UInt16 port() const;
/// Returns the port the server socket listens to
protected:
void run();
/// Runs the server. The server will run until
/// the stop() method is called, or the server
/// object is destroyed, which implicitly calls
/// the stop() method.
static std::string threadName(const ServerSocket& socket);
/// Returns a thread name for the server thread.
private:
TCPServer();
TCPServer(const TCPServer&);
TCPServer& operator = (const TCPServer&);
ServerSocket _socket;
TCPServerDispatcher* _pDispatcher;
Poco::Thread _thread;
bool _stopped;
};
inline Poco::UInt16 TCPServer::port() const
{
return _socket.address().port();
}
} } // namespace Poco::Net
#endif // Net_TCPServer_INCLUDED
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