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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 "stats_table.h"
#include <drizzled/error.h>
#include <libmemcached/server.h>
#if !defined(HAVE_MEMCACHED_SERVER_FN)
typedef memcached_server_function memcached_server_fn;
#endif
namespace drizzle_plugin
{
extern "C"
memcached_return server_function(const memcached_st *ptr,
memcached_server_st *server,
void *context);
struct server_function_context
{
StatsTableTool::Generator* generator;
server_function_context(StatsTableTool::Generator *generator_arg)
: generator(generator_arg)
{}
};
extern "C"
memcached_return server_function(const memcached_st *memc,
memcached_server_st *server,
void *context)
{
server_function_context *ctx= static_cast<server_function_context *>(context);
const char *server_name= memcached_server_name(*memc, *server);
in_port_t server_port= memcached_server_port(*memc, *server);
memcached_stat_st stats;
memcached_return ret= memcached_stat_servername(&stats, NULL,
server_name, server_port);
if (ret != MEMCACHED_SUCCESS)
{
my_printf_error(ER_UNKNOWN_ERROR, _("Unable get stats from memcached server %s. Got error from memcached_stat_servername()."), MYF(0), server_name);
return ret;
}
char **list= memcached_stat_get_keys((memcached_st *)memc, &stats, &ret);
char **ptr= NULL;
ctx->generator->push(server_name);
ctx->generator->push(static_cast<uint64_t>(server_port));
for (ptr= list; *ptr; ptr++)
{
char *value= memcached_stat_get_value((memcached_st *)memc, &stats, *ptr, &ret);
ctx->generator->push(value);
free(value);
}
free(list);
return MEMCACHED_SUCCESS;
}
StatsTableTool::StatsTableTool() :
plugin::TableFunction("DATA_DICTIONARY", "MEMCACHED_STATS")
{
add_field("NAME");
add_field("PORT_NUMBER", plugin::TableFunction::NUMBER);
add_field("PROCESS_ID", plugin::TableFunction::NUMBER);
add_field("UPTIME", plugin::TableFunction::NUMBER);
add_field("TIME", plugin::TableFunction::NUMBER);
add_field("VERSION");
add_field("POINTER_SIZE", plugin::TableFunction::NUMBER);
add_field("RUSAGE_USER", plugin::TableFunction::NUMBER);
add_field("RUSAGE_SYSTEM", plugin::TableFunction::NUMBER);
add_field("CURRENT_ITEMS", plugin::TableFunction::NUMBER);
add_field("TOTAL_ITEMS", plugin::TableFunction::NUMBER);
add_field("BYTES", plugin::TableFunction::NUMBER);
add_field("CURRENT_CONNECTIONS", plugin::TableFunction::NUMBER);
add_field("TOTAL_CONNECTIONS", plugin::TableFunction::NUMBER);
add_field("CONNECTION_STRUCTURES", plugin::TableFunction::NUMBER);
add_field("GETS", plugin::TableFunction::NUMBER);
add_field("SETS", plugin::TableFunction::NUMBER);
add_field("HITS", plugin::TableFunction::NUMBER);
add_field("MISSES", plugin::TableFunction::NUMBER);
add_field("EVICTIONS", plugin::TableFunction::NUMBER);
add_field("BYTES_READ", plugin::TableFunction::NUMBER);
add_field("BYTES_WRITTEN", plugin::TableFunction::NUMBER);
add_field("LIMIT_MAXBYTES", plugin::TableFunction::NUMBER);
add_field("THREADS", plugin::TableFunction::NUMBER);
}
StatsTableTool::Generator::Generator(drizzled::Field **arg) :
plugin::TableFunction::Generator(arg)
{
/* This will be set to the real number if we initialize properly below */
number_of_hosts= 0;
host_number= 0;
/* set to NULL if we are not able to init we dont want to call delete on this */
memc= NULL;
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;
}
memc= memcached_create(NULL);
if (memc == NULL)
{
my_printf_error(ER_UNKNOWN_ERROR, _("Unable to create memcached struct. Got error from memcached_create()."), MYF(0));
return;
}
memcached_server_st *tmp_serv= memcached_servers_parse(servers_string.c_str());
if (tmp_serv == NULL)
{
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());
return;
}
memcached_server_push(memc, tmp_serv);
memcached_server_list_free(tmp_serv);
number_of_hosts= memc->number_of_hosts;
}
StatsTableTool::Generator::~Generator()
{
if (memc != NULL)
{
memcached_free(memc);
}
}
bool StatsTableTool::Generator::populate()
{
if (host_number == number_of_hosts)
{
return false;
}
server_function_context context(this);
memcached_server_function callbacks[1];
callbacks[0]= server_function;
unsigned int iferror;
iferror= (*callbacks[0])(memc, &memc->servers[host_number], (void *)&context);
if (iferror)
{
return false;
}
host_number++;
return true;
}
} /* namespace drizzle_plugin */
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