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Viewing changes to plugin/logging_stats/cumulative_stats.cc

  • Committer: Monty Taylor
  • Date: 2010-03-02 19:10:25 UTC
  • mto: (1317.1.8)
  • mto: This revision was merged to the branch mainline in revision 1322.
  • Revision ID: mordred@inaugust.com-20100302191025-zoxjz4xwkoa6160h
Prevent unauthorized users from changing schema.

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plugin/logging_stats/cumulative_stats.cc
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/*
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 * Copyright (C) 2010 Joseph Daly <skinny.moey@gmail.com>
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 *   * Redistributions of source code must retain the above copyright notice,
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 *     this list of conditions and the following disclaimer.
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 *   * Redistributions in binary form must reproduce the above copyright notice,
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 *     this list of conditions and the following disclaimer in the documentation
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 *     and/or other materials provided with the distribution.
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 *   * Neither the name of Joseph Daly nor the names of its contributors
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 *     may be used to endorse or promote products derived from this software
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 *     without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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 * THE POSSIBILITY OF SUCH DAMAGE.
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 */
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30
 
#include "config.h"
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#include "cumulative_stats.h"
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using namespace std;
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using namespace drizzled;
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CumulativeStats::CumulativeStats(uint32_t in_cumulative_stats_by_user_max) 
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    :
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      cumulative_stats_by_user_max(in_cumulative_stats_by_user_max)  
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{
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  cumulative_stats_by_user_vector= new vector<ScoreboardSlot *>(cumulative_stats_by_user_max);
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  vector<ScoreboardSlot *>::iterator it= cumulative_stats_by_user_vector->begin();
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  for (int32_t j=0; j < cumulative_stats_by_user_max; ++j)
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  {
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    ScoreboardSlot *scoreboard_slot= new ScoreboardSlot();
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    it= cumulative_stats_by_user_vector->insert(it, scoreboard_slot);
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  }
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  cumulative_stats_by_user_vector->resize(cumulative_stats_by_user_max);
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  last_valid_index= INVALID_INDEX;
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  isOpenUserSlots= true;
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  global_stats= new GlobalStats();
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  global_status_vars= new StatusVars();
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55
 
  /* calculate the approximate memory allocation for the cumulative statistics */
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  size_t statusVarsSize= sizeof(StatusVars) + sizeof(system_status_var);
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  size_t userCommandsSize= sizeof(UserCommands) + sizeof(uint64_t) * SQLCOM_END;
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  cumulative_size_bytes= (statusVarsSize + userCommandsSize) * cumulative_stats_by_user_max; 
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}
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CumulativeStats::~CumulativeStats()
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{
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  vector<ScoreboardSlot *>::iterator it= cumulative_stats_by_user_vector->begin();
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  for (; it < cumulative_stats_by_user_vector->end(); ++it)
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  {
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    delete *it;
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  }
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  cumulative_stats_by_user_vector->clear();
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  delete cumulative_stats_by_user_vector;
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  delete global_stats;
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  delete global_status_vars;
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}
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void CumulativeStats::logUserStats(ScoreboardSlot *scoreboard_slot, bool reserveSlot)
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{
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  vector<ScoreboardSlot *>::iterator cumulative_it= cumulative_stats_by_user_vector->begin();
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  /* Search if this is a pre-existing user */
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  int32_t current_index= last_valid_index;
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  if (cumulative_stats_by_user_max <= current_index)
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  {
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    current_index= cumulative_stats_by_user_max;
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  }
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  for (int32_t j=0; j <= current_index; ++j)
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  {
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    ScoreboardSlot *cumulative_scoreboard_slot= *cumulative_it;
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    string user= cumulative_scoreboard_slot->getUser();
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    if (user.compare(scoreboard_slot->getUser()) == 0)
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    {
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      reserveSlot= false;
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      cumulative_scoreboard_slot->merge(scoreboard_slot);
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      break;
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    }
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    ++cumulative_it;
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  }
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  if (reserveSlot)
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  {
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    /* the user was not found */
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    /* its possible multiple simultaneous connections with the same user
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       could result in duplicate entries here, not likely and it would
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       be harmless except for duplicate users showing up in a query */
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    if (hasOpenUserSlots())
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    { 
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      int32_t our_index= last_valid_index.add_and_fetch(1);
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      if (our_index < cumulative_stats_by_user_max)
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      {
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        ScoreboardSlot *cumulative_scoreboard_slot=
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          cumulative_stats_by_user_vector->at(our_index);
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        cumulative_scoreboard_slot->setUser(scoreboard_slot->getUser());
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        cumulative_scoreboard_slot->merge(scoreboard_slot);
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        cumulative_scoreboard_slot->setInUse(true);
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      } 
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      else 
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      {
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        last_valid_index= cumulative_stats_by_user_max - 1; 
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        isOpenUserSlots= false;
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      }
124
 
    } 
125
 
  }
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}
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void CumulativeStats::logGlobalStats(ScoreboardSlot* scoreboard_slot)
129
 
{
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  global_stats->updateUserCommands(scoreboard_slot); 
131
 
}
132
 
 
133
 
void CumulativeStats::logGlobalStatusVars(ScoreboardSlot* scoreboard_slot)
134
 
{
135
 
  global_status_vars->merge(scoreboard_slot->getStatusVars());
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}
137
 
 
138
 
int32_t CumulativeStats::getCumulativeStatsLastValidIndex()
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{
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  if (last_valid_index < cumulative_stats_by_user_max)
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  {
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    return last_valid_index;
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  } 
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  else 
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  {
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    return cumulative_stats_by_user_max;
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  }
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}
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void CumulativeStats::sumCurrentScoreboard(Scoreboard *scoreboard,
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                                           StatusVars *current_status_vars,
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                                           UserCommands *current_user_commands)
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{
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  /* the vector of vectors */
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  vector<vector<ScoreboardSlot* >* > *vector_of_scoreboard_vectors= 
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    scoreboard->getVectorOfScoreboardVectors();
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  /* iterate through each vector from above and sum each ScoreboardSlot */
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160
 
  vector<vector<ScoreboardSlot* >* >::iterator v_of_scoreboard_v_begin_it= vector_of_scoreboard_vectors->begin(); 
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162
 
  vector<vector<ScoreboardSlot* >* >::iterator v_of_scoreboard_v_end_it= vector_of_scoreboard_vectors->end(); 
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164
 
  for (; v_of_scoreboard_v_begin_it != v_of_scoreboard_v_end_it; ++v_of_scoreboard_v_begin_it)
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  {
166
 
    vector<ScoreboardSlot* > *scoreboard_vector= *v_of_scoreboard_v_begin_it;
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168
 
    vector<ScoreboardSlot* >::iterator scoreboard_vector_it= scoreboard_vector->begin();
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    vector<ScoreboardSlot* >::iterator scoreboard_vector_end= scoreboard_vector->end();
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    for (; scoreboard_vector_it != scoreboard_vector_end; ++scoreboard_vector_it)
171
 
    {
172
 
      ScoreboardSlot *scoreboard_slot= *scoreboard_vector_it;
173
 
      if (scoreboard_slot->isInUse())
174
 
      {
175
 
        if (current_status_vars)
176
 
        {
177
 
          current_status_vars->merge(scoreboard_slot->getStatusVars());
178
 
        }
179
 
 
180
 
        if (current_user_commands)
181
 
        {
182
 
          current_user_commands->merge(scoreboard_slot->getUserCommands());
183
 
        }
184
 
      }
185
 
    }
186
 
  }
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}