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/*
* Copyright (C) 2009, Padraig O'Sullivan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Padraig O'Sullivan nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
#include <config.h>
#include "analysis_table.h"
#include "sysvar_holder.h"
#include <drizzled/error.h>
#include <libmemcached/memcached.h>
#include <libmemcached/server.h>
namespace drizzle_plugin
{
AnalysisTableTool::AnalysisTableTool() :
plugin::TableFunction("DATA_DICTIONARY", "MEMCACHED_ANALYSIS")
{
add_field("SERVERS_ANALYZED", plugin::TableFunction::NUMBER);
add_field("AVERAGE_ITEM_SIZE", plugin::TableFunction::NUMBER);
add_field("NODE_WITH_MOST_MEM_CONSUMPTION");
add_field("USED_BYTES", plugin::TableFunction::NUMBER);
add_field("NODE_WITH_LEAST_FREE_SPACE");
add_field("FREE_BYTES", plugin::TableFunction::NUMBER);
add_field("NODE_WITH_LONGEST_UPTIME");
add_field("LONGEST_UPTIME", plugin::TableFunction::NUMBER);
add_field("POOL_WIDE_HIT_RATIO", plugin::TableFunction::NUMBER);
}
AnalysisTableTool::Generator::Generator(Field **arg) :
plugin::TableFunction::Generator(arg)
{
is_done= false;
}
bool AnalysisTableTool::Generator::populate()
{
if (is_done)
{
return false;
}
is_done= true;
drizzled::sys_var *servers_var= drizzled::find_sys_var("memcached_stats_servers");
assert(servers_var != NULL);
const string servers_string(static_cast<char *>(servers_var.value_ptr(NULL, 0)));
if (servers_string.empty())
{
my_printf_error(ER_UNKNOWN_ERROR, _("No value in MEMCACHED_STATS_SERVERS variable."), MYF(0));
return false;
}
memcached_return rc;
memcached_st *serv= memcached_create(NULL);
memcached_server_st *tmp_serv= memcached_servers_parse(servers_string.c_str());
memcached_server_push(serv, tmp_serv);
memcached_server_list_free(tmp_serv);
memcached_stat_st *stats= memcached_stat(serv, NULL, &rc);
memcached_server_st *servers= memcached_server_list(serv);
uint32_t server_count= memcached_server_count(serv);
if (server_count > 1)
{
memcached_analysis_st *report= memcached_analyze(serv, stats, &rc);
push(static_cast<uint64_t>(server_count));
push(static_cast<uint64_t>(report->average_item_size));
push(memcached_server_name(serv, servers[report->most_consumed_server]));
push(report->most_used_bytes);
push(memcached_server_name(serv, servers[report->least_free_server]));
push(report->least_remaining_bytes);
push(memcached_server_name(serv, servers[report->oldest_server]));
push(static_cast<uint64_t>(report->longest_uptime));
push(static_cast<int64_t>(report->pool_hit_ratio));
free(report);
}
memcached_stat_free(serv, stats);
memcached_free(serv);
return true;
}
} /* namespace drizzle_plugin */
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