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* Copyright (c) 2009, Padraig O'Sullivan
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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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* * 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 Padraig O'Sullivan 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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* 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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#include "stats_table.h"
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#include "sysvar_holder.h"
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#include "drizzled/error.h"
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#include <libmemcached/server.h>
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using namespace drizzled;
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#if !defined(HAVE_MEMCACHED_SERVER_FN)
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typedef memcached_server_function memcached_server_fn;
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memcached_return server_function(const memcached_st *ptr,
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memcached_server_st *server,
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struct server_function_context
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StatsTableTool::Generator* generator;
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server_function_context(StatsTableTool::Generator *generator_arg)
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: generator(generator_arg)
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memcached_return server_function(const memcached_st *memc,
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memcached_server_st *server,
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server_function_context *ctx= static_cast<server_function_context *>(context);
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const char *server_name= memcached_server_name(*memc, *server);
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in_port_t server_port= memcached_server_port(*memc, *server);
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memcached_stat_st stats;
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memcached_return ret= memcached_stat_servername(&stats, NULL,
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server_name, server_port);
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if (ret != MEMCACHED_SUCCESS)
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my_printf_error(ER_UNKNOWN_ERROR, _("Unable get stats from memcached server %s. Got error from memcached_stat_servername()."), MYF(0), server_name);
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char **list= memcached_stat_get_keys((memcached_st *)memc, &stats, &ret);
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ctx->generator->push(server_name);
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ctx->generator->push(static_cast<uint64_t>(server_port));
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for (ptr= list; *ptr; ptr++)
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char *value= memcached_stat_get_value((memcached_st *)memc, &stats, *ptr, &ret);
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ctx->generator->push(value);
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return MEMCACHED_SUCCESS;
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StatsTableTool::StatsTableTool() :
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plugin::TableFunction("DATA_DICTIONARY", "MEMCACHED_STATS")
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add_field("PORT_NUMBER", plugin::TableFunction::NUMBER);
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add_field("PROCESS_ID", plugin::TableFunction::NUMBER);
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add_field("UPTIME", plugin::TableFunction::NUMBER);
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add_field("TIME", plugin::TableFunction::NUMBER);
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add_field("VERSION");
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add_field("POINTER_SIZE", plugin::TableFunction::NUMBER);
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add_field("RUSAGE_USER", plugin::TableFunction::NUMBER);
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add_field("RUSAGE_SYSTEM", plugin::TableFunction::NUMBER);
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add_field("CURRENT_ITEMS", plugin::TableFunction::NUMBER);
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add_field("TOTAL_ITEMS", plugin::TableFunction::NUMBER);
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add_field("BYTES", plugin::TableFunction::NUMBER);
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add_field("CURRENT_CONNECTIONS", plugin::TableFunction::NUMBER);
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add_field("TOTAL_CONNECTIONS", plugin::TableFunction::NUMBER);
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add_field("CONNECTION_STRUCTURES", plugin::TableFunction::NUMBER);
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add_field("GETS", plugin::TableFunction::NUMBER);
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add_field("SETS", plugin::TableFunction::NUMBER);
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add_field("HITS", plugin::TableFunction::NUMBER);
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add_field("MISSES", plugin::TableFunction::NUMBER);
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add_field("EVICTIONS", plugin::TableFunction::NUMBER);
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add_field("BYTES_READ", plugin::TableFunction::NUMBER);
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add_field("BYTES_WRITTEN", plugin::TableFunction::NUMBER);
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add_field("LIMIT_MAXBYTES", plugin::TableFunction::NUMBER);
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add_field("THREADS", plugin::TableFunction::NUMBER);
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StatsTableTool::Generator::Generator(Field **arg) :
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plugin::TableFunction::Generator(arg)
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/* This will be set to the real number if we initialize properly below */
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/* set to NULL if we are not able to init we dont want to call delete on this */
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SysvarHolder &sysvar_holder= SysvarHolder::singleton();
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const string servers_string= sysvar_holder.getServersString();
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if (servers_string.empty())
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my_printf_error(ER_UNKNOWN_ERROR, _("No value in MEMCACHED_STATS_SERVERS variable."), MYF(0));
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memc= memcached_create(NULL);
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my_printf_error(ER_UNKNOWN_ERROR, _("Unable to create memcached struct. Got error from memcached_create()."), MYF(0));
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memcached_server_st *tmp_serv=
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memcached_servers_parse(servers_string.c_str());
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if (tmp_serv == NULL)
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my_printf_error(ER_UNKNOWN_ERROR, _("Unable to create memcached server list. Got error from memcached_servers_parse(%s)."), MYF(0), servers_string.c_str());
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memcached_server_push(memc, tmp_serv);
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memcached_server_list_free(tmp_serv);
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number_of_hosts= memc->number_of_hosts;
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StatsTableTool::Generator::~Generator()
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memcached_free(memc);
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bool StatsTableTool::Generator::populate()
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if (host_number == number_of_hosts)
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server_function_context context(this);
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memcached_server_function callbacks[1];
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callbacks[0]= server_function;
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unsigned int iferror;
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iferror= (*callbacks[0])(memc, &memc->servers[host_number], (void *)&context);