~drizzle-trunk/drizzle/development

/*

  Copyright (C) 2010 Stewart Smith

  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; either version 2

  of the License, or (at your option) any later version.

  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 Street, Fifth Floor, Boston, MA  02110-1301, USA.

*/

#include "config.h"

#include "drizzled/plugin/table_function.h"

#include "embedded_innodb-1.0/innodb.h"

#include "status_table_function.h"

using namespace std;

using namespace drizzled;

class LibInnoDBStatusTool : public drizzled::plugin::TableFunction

{

public:

  LibInnoDBStatusTool();

  LibInnoDBStatusTool(const char *table_arg) :

    drizzled::plugin::TableFunction("data_dictionary", table_arg)

  { }

  ~LibInnoDBStatusTool() {}

  class Generator : public drizzled::plugin::TableFunction::Generator

  {

  private:

    uint32_t names_next;

  public:

    Generator(drizzled::Field **arg);

    ~Generator();

    bool populate();

  };

  LibInnoDBStatusTool::Generator *generator(drizzled::Field **arg)

  {

    return new Generator(arg);

  }

};

static const char*      libinnodb_status_var_names[] = {

  "read_req_pending",

  "write_req_pending",

  "fsync_req_pending",

  "write_req_done",

  "read_req_done",

  "fsync_req_done",

  "bytes_total_written",

  "bytes_total_read",

  "buffer_pool_current_size",

  "buffer_pool_data_pages",

  "buffer_pool_dirty_pages",

  "buffer_pool_misc_pages",

  "buffer_pool_free_pages",

  "buffer_pool_read_reqs",

  "buffer_pool_reads",

  "buffer_pool_waited_for_free",

  "buffer_pool_pages_flushed",

  "buffer_pool_write_reqs",

  "buffer_pool_total_pages",

  "buffer_pool_pages_read",

  "buffer_pool_pages_written",

  "double_write_pages_written",

  "double_write_invoked",

  "log_buffer_slot_waits",

  "log_write_reqs",

  "log_write_flush_count",

  "log_bytes_written",

  "log_fsync_req_done",

  "log_write_req_pending",

  "log_fsync_req_pending",

  "lock_row_waits",

  "lock_row_waiting",

  "lock_total_wait_time_in_secs",

  "lock_wait_time_avg_in_secs",

  "lock_max_wait_time_in_secs",

  "row_total_read",

  "row_total_inserted",

  "row_total_updated",

  "row_total_deleted",

  "page_size",

  "have_atomic_builtins",

  NULL

};

LibInnoDBStatusTool::LibInnoDBStatusTool() :

  plugin::TableFunction("DATA_DICTIONARY", "INNODB_STATUS")

{

  add_field("NAME");

  add_field("VALUE", plugin::TableFunction::NUMBER);

}

LibInnoDBStatusTool::Generator::Generator(Field **arg) :

  plugin::TableFunction::Generator(arg),

  names_next(0)

{

}

LibInnoDBStatusTool::Generator::~Generator()

{

}

bool LibInnoDBStatusTool::Generator::populate()

{

  if (libinnodb_status_var_names[names_next] != NULL)

  {

    const char* config_name= libinnodb_status_var_names[names_next];

    push(config_name);

    ib_i64_t value;

    ib_err_t err= ib_status_get_i64(config_name, &value);

    assert(err == DB_SUCCESS);

    push(value);

    names_next++;

    return true;

  }

  return false; // No more rows

}

static LibInnoDBStatusTool *status_tool;

int status_table_function_initialize(drizzled::module::Context &context)

{

  status_tool= new(std::nothrow)LibInnoDBStatusTool();

  context.add(status_tool);

  return 0;

}