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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef DRIZZLED_PLUGIN_NULL_CLIENT_H
#define DRIZZLED_PLUGIN_NULL_CLIENT_H
#include <drizzled/plugin/client.h>
#include<boost/tokenizer.hpp>
#include <vector>
#include <queue>
#include <string>
namespace drizzled
{
namespace plugin
{
/**
* This class is an empty client implementation for internal used.
*/
class NullClient: public Client
{
typedef std::vector<char> Bytes;
typedef std::queue <Bytes> Queue;
Queue to_execute;
bool is_dead;
Bytes packet_buffer;
public:
NullClient() :
is_dead(false)
{
}
virtual int getFileDescriptor(void) { return -1; }
virtual bool isConnected(void) { return true; }
virtual bool isReading(void) { return false; }
virtual bool isWriting(void) { return false; }
virtual bool flush(void) { return false; }
virtual void close(void) {}
virtual bool authenticate(void) { return true; }
virtual bool readCommand(char **packet, uint32_t *packet_length)
{
while(not to_execute.empty())
{
Queue::value_type next= to_execute.front();
packet_buffer.resize(next.size());
memcpy(&packet_buffer[0], &next[0], next.size());
*packet= &packet_buffer[0];
*packet_length= next.size();
to_execute.pop();
return true;
}
if (not is_dead)
{
packet_buffer.resize(1);
*packet_length= 1;
*packet= &packet_buffer[0];
is_dead= true;
return true;
}
*packet_length= 0;
return false;
}
virtual void sendOK(void) {}
virtual void sendEOF(void) {}
virtual void sendError(uint32_t, const char*) {}
virtual bool sendFields(List<Item>*) { return false; }
virtual bool store(Field *) { return false; }
virtual bool store(void) { return false; }
virtual bool store(int32_t) { return false; }
virtual bool store(uint32_t) { return false; }
virtual bool store(int64_t) { return false; }
virtual bool store(uint64_t) { return false; }
virtual bool store(double, uint32_t, String*) { return false; }
virtual bool store(const DRIZZLE_TIME*) { return false; }
virtual bool store(const char*) { return false; }
virtual bool store(const char*, size_t) { return false; }
virtual bool store(const std::string &) { return false; }
virtual bool haveMoreData(void) { return false;}
virtual bool haveError(void) { return false; }
virtual bool wasAborted(void) { return false; }
void pushSQL(const std::string &arg)
{
Bytes byte;
typedef boost::tokenizer<boost::escaped_list_separator<char> > Tokenizer;
Tokenizer tok(arg, boost::escaped_list_separator<char>("\\", ";", "\""));
for (Tokenizer::iterator iter= tok.begin(); iter != tok.end(); ++iter)
{
byte.resize((*iter).size() +1); // +1 for the COM_QUERY
byte[0]= COM_QUERY;
memcpy(&byte[1], (*iter).c_str(), (*iter).size());
to_execute.push(byte);
}
}
};
} /* namespace plugin */
} /* namespace drizzled */
#endif /* DRIZZLED_PLUGIN_NULL_CLIENT_H */
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