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/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_SOCKETPOOL_H__
#define TALK_BASE_SOCKETPOOL_H__
#include <deque>
#include <vector>
#include "talk/base/logging.h"
#include "talk/base/sigslot.h"
namespace talk_base {
class AsyncSocket;
class LoggingAdapter;
class SocketAddress;
class SocketFactory;
class SocketStream;
class StreamInterface;
//////////////////////////////////////////////////////////////////////
// StreamPool
//////////////////////////////////////////////////////////////////////
class StreamPool {
public:
virtual ~StreamPool() { }
virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
int* err) = 0;
virtual void ReturnConnectedStream(StreamInterface* stream) = 0;
};
///////////////////////////////////////////////////////////////////////////////
// StreamCache - Caches a set of open streams, defers creation/destruction to
// the supplied StreamPool.
///////////////////////////////////////////////////////////////////////////////
class StreamCache : public StreamPool, public sigslot::has_slots<> {
public:
StreamCache(StreamPool* pool);
virtual ~StreamCache();
// StreamPool Interface
virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
int* err);
virtual void ReturnConnectedStream(StreamInterface* stream);
private:
typedef std::pair<SocketAddress, StreamInterface*> ConnectedStream;
typedef std::list<ConnectedStream> ConnectedList;
void OnStreamEvent(StreamInterface* stream, int events, int err);
// We delegate stream creation and deletion to this pool.
StreamPool* pool_;
// Streams that are in use (returned from RequestConnectedStream).
ConnectedList active_;
// Streams which were returned to us, but are still open.
ConnectedList cached_;
};
//////////////////////////////////////////////////////////////////////
// NewSocketPool //
///////////////////
// Creates a new PTcpSocket every time
//////////////////////////////////////////////////////////////////////
class NewSocketPool : public StreamPool {
public:
NewSocketPool(SocketFactory* factory);
virtual ~NewSocketPool();
// StreamPool Interface
virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
int* err);
virtual void ReturnConnectedStream(StreamInterface* stream);
private:
SocketFactory* factory_;
std::vector<StreamInterface*> used_;
};
//////////////////////////////////////////////////////////////////////
// ReuseSocketPool //
/////////////////////
// Pass a PTcpSocket chain to the constructor, and if the connection
// is still open, it will be reused.
//////////////////////////////////////////////////////////////////////
class ReuseSocketPool : public StreamPool {
public:
ReuseSocketPool(SocketFactory* factory, AsyncSocket* socket = 0);
virtual ~ReuseSocketPool();
void setSocket(AsyncSocket* socket);
// StreamPool Interface
virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
int* err);
virtual void ReturnConnectedStream(StreamInterface* stream);
private:
SocketFactory* factory_;
SocketStream* stream_;
};
///////////////////////////////////////////////////////////////////////////////
// LoggingPoolAdapter - Adapts a StreamPool to supply streams with attached
// LoggingAdapters.
///////////////////////////////////////////////////////////////////////////////
class LoggingPoolAdapter : public StreamPool {
public:
LoggingPoolAdapter(StreamPool* pool, LoggingSeverity level,
const std::string& label, bool binary_mode);
virtual ~LoggingPoolAdapter();
// StreamPool Interface
virtual StreamInterface* RequestConnectedStream(const SocketAddress& remote,
int* err);
virtual void ReturnConnectedStream(StreamInterface* stream);
private:
StreamPool* pool_;
LoggingSeverity level_;
std::string label_;
bool binary_mode_;
typedef std::deque<LoggingAdapter*> StreamList;
StreamList recycle_bin_;
};
//////////////////////////////////////////////////////////////////////
} // namespace talk_base
#endif // TALK_BASE_SOCKETPOOL_H__
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