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Viewing changes to plugin/logging_gearman/logging_gearman.cc

  • Committer: Brian Aker
  • Date: 2010-08-18 19:37:19 UTC
  • mto: This revision was merged to the branch mainline in revision 1720.
  • Revision ID: brian@tangent.org-20100818193719-bxxzn1pi22styowd
created function that can be used to simply crash the server.

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plugin/logging_gearman/logging_gearman.cc
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 */
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#include "config.h"
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#include <boost/scoped_array.hpp>
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#include <drizzled/plugin/logging.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 <limits.h>
 
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <cstdio>
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#include <cerrno>
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#include <memory>
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39
 
 
40
 
namespace drizzle_plugin
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{
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using namespace drizzled;
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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;
 
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static char* sysvar_logging_gearman_host= NULL;
 
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static char* sysvar_logging_gearman_function= NULL;
 
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44
 
 
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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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{
 
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#if defined(HAVE_GETHRTIME)
 
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  return gethrtime()/1000;
 
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#else
 
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  uint64_t newtime;
 
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  struct timeval t;
 
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  /*
 
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    The following loop is here because gettimeofday may fail on some systems
 
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  */
 
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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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  return newtime;
 
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#endif  /* defined(HAVE_GETHRTIME) */
 
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}
 
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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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  return dst;
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}
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class LoggingGearman :
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  public drizzled::plugin::Logging
 
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class LoggingGearman : public plugin::Logging
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{
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  const std::string _host;
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  const std::string _function;
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163
 
  int _gearman_client_ok;
164
 
  gearman_client_st _gearman_client;
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166
 
  LoggingGearman();
167
 
  LoggingGearman(const LoggingGearman&);
 
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  int gearman_client_ok;
 
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  gearman_client_st gearman_client;
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public:
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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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    _host(host),
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    _function(function),
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    _gearman_client_ok(0),
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    _gearman_client()
 
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  LoggingGearman()
 
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    : plugin::Logging("LoggingGearman"),
 
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      gearman_client_ok(0)
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  {
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    gearman_return_t ret;
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186
 
181
 
 
182
 
    if (gearman_client_create(&_gearman_client) == NULL)
 
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    if (sysvar_logging_gearman_enable == false)
 
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      return;
 
189
 
 
190
    if (sysvar_logging_gearman_host == NULL)
 
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      return;
 
192
 
 
193
 
 
194
    if (gearman_client_create(&gearman_client) == NULL)
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    {
184
 
      char errmsg[STRERROR_MAX];
185
 
      strerror_r(errno, errmsg, sizeof(errmsg));
186
 
      drizzled::errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
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                              errmsg);
 
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      errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
 
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                    strerror(errno));
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      return;
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    }
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    /* TODO, be able to override the port */
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    /* TODO, be able send to multiple servers */
193
 
    ret= gearman_client_add_server(&_gearman_client,
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                                   host.c_str(), 0);
 
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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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    {
197
 
      drizzled::errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
198
 
                              gearman_client_error(&_gearman_client));
 
207
      errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
 
208
                    gearman_client_error(&gearman_client));
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      return;
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    }
201
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202
 
    _gearman_client_ok= 1;
 
212
    gearman_client_ok= 1;
203
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204
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  }
205
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206
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  ~LoggingGearman()
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  {
208
 
    if (_gearman_client_ok)
 
218
    if (gearman_client_ok)
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    {
210
 
      gearman_client_free(&_gearman_client);
 
220
      gearman_client_free(&gearman_client);
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    }
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  }
213
223
 
214
 
  virtual bool post(drizzled::Session *session)
 
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  virtual bool post(Session *session)
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  {
216
 
    boost::scoped_array<char> msgbuf(new char[MAX_MSG_LEN]);
 
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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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       but that crashes the server, so for now, we just lie a little bit
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    */
224
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225
 
    if (not _gearman_client_ok)
 
235
    if (!gearman_client_ok)
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        return false;
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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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232
 
    boost::posix_time::ptime mytime(boost::posix_time::microsec_clock::local_time());
233
 
    boost::posix_time::ptime epoch(boost::gregorian::date(1970,1,1));
234
 
    uint64_t t_mark= (mytime-epoch).total_microseconds();
 
242
    uint64_t t_mark= get_microtime();
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236
 
 
237
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    // buffer to quotify the query
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    unsigned char qs[255];
239
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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());
 
248
    const char *dbs= session->db.empty() ? "" : session->db.c_str();
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    msgbuf_len=
244
 
      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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               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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               (int)session->db.length(), dbs,
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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((const unsigned char *)session->getQueryString().c_str(),
 
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                       session->getQueryLength(), 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,
258
 
               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->start_utime),
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               session->tmp_table,
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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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               glob_hostname
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               );
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    char job_handle[GEARMAN_JOB_HANDLE_SIZE];
272
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273
 
    (void) gearman_client_do_background(&_gearman_client,
274
 
                                        _function.c_str(),
 
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    (void) gearman_client_do_background(&gearman_client,
 
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                                        sysvar_logging_gearman_function,
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                                        NULL,
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                                        (void *) msgbuf.get(),
 
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                                        (void *) msgbuf,
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                                        (size_t) msgbuf_len,
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                                        job_handle);
279
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283
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284
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static LoggingGearman *handler= NULL;
285
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286
 
static int logging_gearman_plugin_init(drizzled::module::Context &context)
 
294
static int logging_gearman_plugin_init(module::Context &context)
287
295
{
288
 
  const drizzled::module::option_map &vm= context.getOptions();
289
 
 
290
 
  handler= new LoggingGearman(vm["host"].as<std::string>(),
291
 
                              vm["function"].as<std::string>());
 
296
  handler= new LoggingGearman();
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  context.add(handler);
293
 
  context.registerVariable(new drizzled::sys_var_const_string_val("host", vm["host"].as<std::string>()));
294
 
  context.registerVariable(new drizzled::sys_var_const_string_val("function", vm["function"].as<std::string>()));
295
298
 
296
299
  return 0;
297
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}
298
301
 
299
302
static void init_options(drizzled::module::option_context &context)
300
303
{
301
 
  context("host",
302
 
          po::value<std::string>()->default_value("localhost"),
303
 
          N_("Hostname for logging to a Gearman server"));
304
 
  context("function",
305
 
          po::value<std::string>()->default_value("drizzlelog"),
306
 
          N_("Gearman Function to send logging to"));
 
304
  context("enable",
 
305
          po::value<bool>(&sysvar_logging_gearman_enable)->default_value(false)->zero_tokens(),
 
306
          N_("Enable logging to a gearman server"));
307
307
}
308
308
 
309
 
} /* namespace drizzle_plugin */
 
309
static DRIZZLE_SYSVAR_BOOL(
 
310
                           enable,
 
311
                           sysvar_logging_gearman_enable,
 
312
                           PLUGIN_VAR_NOCMDARG,
 
313
                           N_("Enable logging to a gearman server"),
 
314
                           NULL, /* check func */
 
315
                           NULL, /* update func */
 
316
                           false /* default */);
 
317
 
 
318
static DRIZZLE_SYSVAR_STR(
 
319
                          host,
 
320
                          sysvar_logging_gearman_host,
 
321
                          PLUGIN_VAR_READONLY,
 
322
                          N_("Hostname for logging to a Gearman server"),
 
323
                          NULL, /* check func */
 
324
                          NULL, /* update func*/
 
325
                          "localhost" /* default */);
 
326
 
 
327
static DRIZZLE_SYSVAR_STR(
 
328
                          function,
 
329
                          sysvar_logging_gearman_function,
 
330
                          PLUGIN_VAR_READONLY,
 
331
                          N_("Gearman Function to send logging to"),
 
332
                          NULL, /* check func */
 
333
                          NULL, /* update func*/
 
334
                          "drizzlelog" /* default */);
 
335
 
 
336
static drizzle_sys_var* logging_gearman_system_variables[]= {
 
337
  DRIZZLE_SYSVAR(enable),
 
338
  DRIZZLE_SYSVAR(host),
 
339
  DRIZZLE_SYSVAR(function),
 
340
  NULL
 
341
};
310
342
 
311
343
DRIZZLE_DECLARE_PLUGIN
312
344
{
315
347
    "0.1",
316
348
    "Mark Atwood <mark@fallenpegasus.com>",
317
349
    N_("Log queries to a Gearman server"),
318
 
    drizzled::PLUGIN_LICENSE_GPL,
319
 
    drizzle_plugin::logging_gearman_plugin_init,
320
 
    NULL,
321
 
    drizzle_plugin::init_options
 
350
    PLUGIN_LICENSE_GPL,
 
351
    logging_gearman_plugin_init,
 
352
    logging_gearman_system_variables,
 
353
    init_options
322
354
}
323
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DRIZZLE_DECLARE_PLUGIN_END;