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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <boost/scoped_array.hpp>
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#include <drizzled/plugin/logging.h>
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#include <drizzled/server_includes.h>
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#include <drizzled/plugin/logging_handler.h>
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#include <drizzled/gettext.h>
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#include <drizzled/session.h>
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#include <boost/date_time.hpp>
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#include <boost/program_options.hpp>
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#include <drizzled/module/option_map.h>
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#include <libgearman/gearman.h>
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#include <sys/types.h>
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namespace drizzle_plugin
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namespace po= boost::program_options;
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/* TODO make this dynamic as needed */
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static const int MAX_MSG_LEN= 32*1024;
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static bool sysvar_logging_gearman_enable= false;
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static char* sysvar_logging_gearman_host= NULL;
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static gearman_client_st gearman_client;
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/* stolen from mysys/my_getsystime
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until the Session has a good utime "now" we can use
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will have to use this instead */
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static uint64_t get_microtime()
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#if defined(HAVE_GETHRTIME)
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return gethrtime()/1000;
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The following loop is here because gettimeofday may fail on some systems
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while (gettimeofday(&t, NULL) != 0) {}
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newtime= (uint64_t)t.tv_sec * 1000000 + t.tv_usec;
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#endif /* defined(HAVE_GETHRTIME) */
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/* quote a string to be safe to include in a CSV line
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that means backslash quoting all commas, doublequotes, backslashes,
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and all the ASCII unprintable characters
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class LoggingGearman :
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public drizzled::plugin::Logging
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class LoggingGearman : public Logging_handler
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const std::string _host;
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const std::string _function;
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int _gearman_client_ok;
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gearman_client_st _gearman_client;
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LoggingGearman(const LoggingGearman&);
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LoggingGearman(const std::string &host,
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const std::string &function) :
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drizzled::plugin::Logging("LoggingGearman"),
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_gearman_client_ok(0),
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gearman_return_t ret;
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if (gearman_client_create(&_gearman_client) == NULL)
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char errmsg[STRERROR_MAX];
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strerror_r(errno, errmsg, sizeof(errmsg));
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drizzled::errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
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/* TODO, be able to override the port */
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/* TODO, be able send to multiple servers */
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ret= gearman_client_add_server(&_gearman_client,
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if (ret != GEARMAN_SUCCESS)
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drizzled::errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
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gearman_client_error(&_gearman_client));
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_gearman_client_ok= 1;
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if (_gearman_client_ok)
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gearman_client_free(&_gearman_client);
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virtual bool post(drizzled::Session *session)
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boost::scoped_array<char> msgbuf(new char[MAX_MSG_LEN]);
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LoggingGearman() : Logging_handler("LoggingGearman") {}
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virtual bool post(Session *session)
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char msgbuf[MAX_MSG_LEN];
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int msgbuf_len= 0;
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assert(session != NULL);
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/* in theory, we should return "true", meaning that the plugin isn't happy,
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but that crashes the server, so for now, we just lie a little bit
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if (not _gearman_client_ok)
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if (sysvar_logging_gearman_enable == false)
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/* TODO, looks like connect_utime isnt being set in the session
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object. We could store the time this plugin was loaded, but that
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would just be a dumb workaround. */
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/* TODO, the session object should have a "utime command completed"
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inside itself, so be more accurate, and so this doesnt have to
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keep calling current_utime, which can be slow */
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boost::posix_time::ptime mytime(boost::posix_time::microsec_clock::local_time());
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boost::posix_time::ptime epoch(boost::gregorian::date(1970,1,1));
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uint64_t t_mark= (mytime-epoch).total_microseconds();
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uint64_t t_mark= get_microtime();
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// buffer to quotify the query
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unsigned char qs[255];
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// to avoid trying to printf %s something that is potentially NULL
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drizzled::util::string::const_shared_ptr dbs(session->schema());
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const char *dbs= (session->db) ? session->db : "";
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dbl= session->db_length;
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// todo, add hostname, listener port, and server id to this
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snprintf(msgbuf.get(), MAX_MSG_LEN,
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snprintf(msgbuf, MAX_MSG_LEN,
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"%"PRIu64",%"PRIu64",%"PRIu64",\"%.*s\",\"%s\",\"%.*s\","
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"%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64","
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"%"PRIu32",%"PRIu32",%"PRIu32",\"%s\"",
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"%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64"",
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session->thread_id,
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session->getQueryId(),
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// dont need to quote the db name, always CSV safe
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(int)dbs->size(), dbs->c_str(),
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// do need to quote the query
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quotify((const unsigned char *)session->getQueryString()->c_str(), session->getQueryString()->length(), qs, sizeof(qs)),
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quotify((unsigned char *)session->query,
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session->query_length, qs, sizeof(qs)),
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// command_name is defined in drizzled/sql_parse.cc
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// dont need to quote the command name, always CSV safe
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(int)drizzled::command_name[session->command].length,
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drizzled::command_name[session->command].str,
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(int)command_name[session->command].length,
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command_name[session->command].str,
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// counters are at end, to make it easier to add more
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(t_mark - session->getConnectMicroseconds()),
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(t_mark - session->connect_utime),
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(t_mark - session->start_utime),
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(t_mark - session->utime_after_lock),
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session->sent_row_count,
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session->examined_row_count,
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session->total_warn_count,
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session->getServerId(),
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drizzled::glob_hostname
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session->examined_row_count);
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char job_handle[GEARMAN_JOB_HANDLE_SIZE];
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(void) gearman_client_do_background(&_gearman_client,
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(void) gearman_client_do_background(&gearman_client,
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(void *) msgbuf.get(),
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(size_t) msgbuf_len,
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static LoggingGearman *handler= NULL;
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static int logging_gearman_plugin_init(drizzled::module::Context &context)
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const drizzled::module::option_map &vm= context.getOptions();
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handler= new LoggingGearman(vm["host"].as<std::string>(),
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vm["function"].as<std::string>());
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context.add(handler);
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context.registerVariable(new drizzled::sys_var_const_string_val("host", vm["host"].as<std::string>()));
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context.registerVariable(new drizzled::sys_var_const_string_val("function", vm["function"].as<std::string>()));
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static void init_options(drizzled::module::option_context &context)
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po::value<std::string>()->default_value("localhost"),
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N_("Hostname for logging to a Gearman server"));
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po::value<std::string>()->default_value("drizzlelog"),
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N_("Gearman Function to send logging to"));
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} /* namespace drizzle_plugin */
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DRIZZLE_DECLARE_PLUGIN
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static Logging_handler *handler= NULL;
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static int logging_gearman_plugin_init(PluginRegistry ®istry)
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gearman_return_t ret;
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saying "return 0" means "success"
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right now, if we return an error
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this causes Drizzle to crash
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so until that is fixed,
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just return a success,
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but leave the function pointers as NULL
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if (sysvar_logging_gearman_host == NULL)
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/* no destination gearman server host was specified via system variables
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return now, dont set the callback pointers
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if (gearman_client_create(&gearman_client) == NULL)
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errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
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/* TODO, be able to override the port */
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ret= gearman_client_add_server(&gearman_client,
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sysvar_logging_gearman_host, 0);
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if (ret != GEARMAN_SUCCESS)
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errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
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gearman_client_error(&gearman_client));
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handler= new LoggingGearman();
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registry.add(handler);
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static int logging_gearman_plugin_deinit(PluginRegistry ®istry)
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gearman_client_free(&gearman_client);
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registry.remove(handler);
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static DRIZZLE_SYSVAR_BOOL(
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sysvar_logging_gearman_enable,
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N_("Enable logging to a gearman server"),
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NULL, /* check func */
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NULL, /* update func */
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false /* default */);
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static DRIZZLE_SYSVAR_STR(
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sysvar_logging_gearman_host,
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N_("Hostname for logging to a Gearman server"),
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NULL, /* check func */
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NULL, /* update func*/
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static struct st_mysql_sys_var* logging_gearman_system_variables[]= {
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DRIZZLE_SYSVAR(enable),
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DRIZZLE_SYSVAR(host),
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drizzle_declare_plugin(logging_gearman)
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"Mark Atwood <mark@fallenpegasus.com>",
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N_("Log queries to a Gearman server"),
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drizzled::PLUGIN_LICENSE_GPL,
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drizzle_plugin::logging_gearman_plugin_init,
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drizzle_plugin::init_options
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logging_gearman_plugin_init,
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logging_gearman_plugin_deinit,
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NULL, /* status variables */
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logging_gearman_system_variables,
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DRIZZLE_DECLARE_PLUGIN_END;
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drizzle_declare_plugin_end;