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plugin/logging_gearman/logging_gearman.cc
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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20
 
#include "config.h"
21
 
 
22
 
#include <boost/scoped_array.hpp>
23
 
 
24
 
#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>
27
 
#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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30
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#include <libgearman/gearman.h>
31
 
#include <limits.h>
32
 
#include <sys/types.h>
33
 
#include <sys/stat.h>
34
 
#include <fcntl.h>
35
 
#include <cstdio>
36
 
#include <cerrno>
37
 
#include <memory>
38
 
 
39
 
 
40
 
namespace drizzle_plugin
41
 
{
42
 
 
43
 
namespace po= boost::program_options;
 
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45
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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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30
 
 
31
static bool sysvar_logging_gearman_enable= false;
 
32
static char* sysvar_logging_gearman_host= NULL;
 
33
static char* sysvar_logging_gearman_function= NULL;
 
34
 
 
35
 
 
36
/* stolen from mysys/my_getsystime
 
37
   until the Session has a good utime "now" we can use
 
38
   will have to use this instead */
 
39
 
 
40
#include <sys/time.h>
 
41
static uint64_t get_microtime()
 
42
{
 
43
#if defined(HAVE_GETHRTIME)
 
44
  return gethrtime()/1000;
 
45
#else
 
46
  uint64_t newtime;
 
47
  struct timeval t;
 
48
  /*
 
49
    The following loop is here because gettimeofday may fail on some systems
 
50
  */
 
51
  while (gettimeofday(&t, NULL) != 0) {}
 
52
  newtime= (uint64_t)t.tv_sec * 1000000 + t.tv_usec;
 
53
  return newtime;
 
54
#endif  /* defined(HAVE_GETHRTIME) */
 
55
}
 
56
 
48
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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
153
162
  return dst;
154
163
}
155
164
 
156
 
class LoggingGearman :
157
 
  public drizzled::plugin::Logging
 
165
class LoggingGearman : public Logging_handler
158
166
{
159
167
 
160
 
  const std::string _host;
161
 
  const std::string _function;
162
 
 
163
 
  int _gearman_client_ok;
164
 
  gearman_client_st _gearman_client;
165
 
 
166
 
  LoggingGearman();
167
 
  LoggingGearman(const LoggingGearman&);
 
168
  int gearman_client_ok;
 
169
  gearman_client_st gearman_client;
168
170
 
169
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public:
170
172
 
171
 
  LoggingGearman(const std::string &host,
172
 
                 const std::string &function) :
173
 
    drizzled::plugin::Logging("LoggingGearman"),
174
 
    _host(host),
175
 
    _function(function),
176
 
    _gearman_client_ok(0),
177
 
    _gearman_client()
 
173
  LoggingGearman() : Logging_handler("LoggingGearman"), gearman_client_ok(0)
178
174
  {
179
175
    gearman_return_t ret;
180
176
 
181
 
 
182
 
    if (gearman_client_create(&_gearman_client) == NULL)
 
177
    if (sysvar_logging_gearman_enable == false)
 
178
      return;
 
179
 
 
180
    if (sysvar_logging_gearman_host == NULL)
 
181
      return;
 
182
 
 
183
 
 
184
    if (gearman_client_create(&gearman_client) == NULL)
183
185
    {
184
 
      char errmsg[STRERROR_MAX];
185
 
      strerror_r(errno, errmsg, sizeof(errmsg));
186
 
      drizzled::errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
187
 
                              errmsg);
 
186
      errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
 
187
                    strerror(errno));
188
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      return;
189
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    }
190
190
 
191
191
    /* TODO, be able to override the port */
192
192
    /* TODO, be able send to multiple servers */
193
 
    ret= gearman_client_add_server(&_gearman_client,
194
 
                                   host.c_str(), 0);
 
193
    ret= gearman_client_add_server(&gearman_client,
 
194
                                   sysvar_logging_gearman_host, 0);
195
195
    if (ret != GEARMAN_SUCCESS)
196
196
    {
197
 
      drizzled::errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
198
 
                              gearman_client_error(&_gearman_client));
 
197
      errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
 
198
                    gearman_client_error(&gearman_client));
199
199
      return;
200
200
    }
201
201
 
202
 
    _gearman_client_ok= 1;
 
202
    gearman_client_ok= 1;
203
203
 
204
204
  }
205
205
 
206
206
  ~LoggingGearman()
207
207
  {
208
 
    if (_gearman_client_ok)
 
208
    if (gearman_client_ok)
209
209
    {
210
 
      gearman_client_free(&_gearman_client);
 
210
      gearman_client_free(&gearman_client);
211
211
    }
212
212
  }
213
213
 
214
 
  virtual bool post(drizzled::Session *session)
 
214
  virtual bool post(Session *session)
215
215
  {
216
 
    boost::scoped_array<char> msgbuf(new char[MAX_MSG_LEN]);
 
216
    char msgbuf[MAX_MSG_LEN];
217
217
    int msgbuf_len= 0;
218
218
  
219
219
    assert(session != NULL);
222
222
       but that crashes the server, so for now, we just lie a little bit
223
223
    */
224
224
 
225
 
    if (not _gearman_client_ok)
 
225
    if (!gearman_client_ok)
226
226
        return false;
227
227
  
 
228
    /* TODO, looks like connect_utime isnt being set in the session
 
229
       object.  We could store the time this plugin was loaded, but that
 
230
       would just be a dumb workaround. */
228
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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 */
231
234
  
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();
 
235
    uint64_t t_mark= get_microtime();
235
236
  
236
 
 
237
237
    // buffer to quotify the query
238
238
    unsigned char qs[255];
239
239
  
240
240
    // to avoid trying to printf %s something that is potentially NULL
241
 
    drizzled::util::string::const_shared_ptr dbs(session->schema());
 
241
    const char *dbs= (session->db) ? session->db : "";
 
242
    int dbl= 0;
 
243
    if (dbs != NULL)
 
244
      dbl= session->db_length;
 
245
  
 
246
    // todo, add hostname, listener port, and server id to this
242
247
  
243
248
    msgbuf_len=
244
 
      snprintf(msgbuf.get(), MAX_MSG_LEN,
 
249
      snprintf(msgbuf, MAX_MSG_LEN,
245
250
               "%"PRIu64",%"PRIu64",%"PRIu64",\"%.*s\",\"%s\",\"%.*s\","
246
 
               "%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64","
247
 
               "%"PRIu32",%"PRIu32",%"PRIu32",\"%s\"",
 
251
               "%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64
 
252
               "%"PRIu32",%"PRIu32"",
248
253
               t_mark,
249
254
               session->thread_id,
250
 
               session->getQueryId(),
 
255
               session->query_id,
251
256
               // dont need to quote the db name, always CSV safe
252
 
               (int)dbs->size(), dbs->c_str(),
 
257
               dbl, dbs,
253
258
               // do need to quote the query
254
 
               quotify((const unsigned char *)session->getQueryString()->c_str(), session->getQueryString()->length(), qs, sizeof(qs)),
 
259
               quotify((unsigned char *)session->query,
 
260
                       session->query_length, qs, sizeof(qs)),
255
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               // command_name is defined in drizzled/sql_parse.cc
256
262
               // dont need to quote the command name, always CSV safe
257
 
               (int)drizzled::command_name[session->command].length,
258
 
               drizzled::command_name[session->command].str,
 
263
               (int)command_name[session->command].length,
 
264
               command_name[session->command].str,
259
265
               // counters are at end, to make it easier to add more
260
 
               (t_mark - session->getConnectMicroseconds()),
 
266
               (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,
264
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               session->examined_row_count,
265
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               session->tmp_table,
266
 
               session->total_warn_count,
267
 
               session->getServerId(),
268
 
               drizzled::glob_hostname
269
 
               );
 
272
               session->total_warn_count);
270
273
  
271
274
    char job_handle[GEARMAN_JOB_HANDLE_SIZE];
272
275
  
273
 
    (void) gearman_client_do_background(&_gearman_client,
274
 
                                        _function.c_str(),
 
276
    (void) gearman_client_do_background(&gearman_client,
 
277
                                        sysvar_logging_gearman_function,
275
278
                                        NULL,
276
 
                                        (void *) msgbuf.get(),
 
279
                                        (void *) msgbuf,
277
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                                        (size_t) msgbuf_len,
278
281
                                        job_handle);
279
282
  
281
284
  }
282
285
};
283
286
 
284
 
static LoggingGearman *handler= NULL;
285
 
 
286
 
static int logging_gearman_plugin_init(drizzled::module::Context &context)
287
 
{
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>());
292
 
  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
 
 
296
 
  return 0;
297
 
}
298
 
 
299
 
static void init_options(drizzled::module::option_context &context)
300
 
{
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"));
307
 
}
308
 
 
309
 
} /* namespace drizzle_plugin */
310
 
 
311
 
DRIZZLE_DECLARE_PLUGIN
312
 
{
313
 
  DRIZZLE_VERSION_ID,
314
 
    "logging-gearman",
 
287
static Logging_handler *handler= NULL;
 
288
 
 
289
static int logging_gearman_plugin_init(PluginRegistry &registry)
 
290
{
 
291
  handler= new LoggingGearman();
 
292
  registry.add(handler);
 
293
 
 
294
  return 0;
 
295
}
 
296
 
 
297
static int logging_gearman_plugin_deinit(PluginRegistry &registry)
 
298
{
 
299
  registry.remove(handler);
 
300
  delete(handler);
 
301
 
 
302
  return 0;
 
303
}
 
304
 
 
305
static DRIZZLE_SYSVAR_BOOL(
 
306
                           enable,
 
307
                           sysvar_logging_gearman_enable,
 
308
                           PLUGIN_VAR_NOCMDARG,
 
309
                           N_("Enable logging to a gearman server"),
 
310
                           NULL, /* check func */
 
311
                           NULL, /* update func */
 
312
                           false /* default */);
 
313
 
 
314
static DRIZZLE_SYSVAR_STR(
 
315
                          host,
 
316
                          sysvar_logging_gearman_host,
 
317
                          PLUGIN_VAR_READONLY,
 
318
                          N_("Hostname for logging to a Gearman server"),
 
319
                          NULL, /* check func */
 
320
                          NULL, /* update func*/
 
321
                          "localhost" /* default */);
 
322
 
 
323
static DRIZZLE_SYSVAR_STR(
 
324
                          function,
 
325
                          sysvar_logging_gearman_function,
 
326
                          PLUGIN_VAR_READONLY,
 
327
                          N_("Gearman Function to send logging to"),
 
328
                          NULL, /* check func */
 
329
                          NULL, /* update func*/
 
330
                          "drizzlelog" /* default */);
 
331
 
 
332
static struct st_mysql_sys_var* logging_gearman_system_variables[]= {
 
333
  DRIZZLE_SYSVAR(enable),
 
334
  DRIZZLE_SYSVAR(host),
 
335
  DRIZZLE_SYSVAR(function),
 
336
  NULL
 
337
};
 
338
 
 
339
drizzle_declare_plugin(logging_gearman)
 
340
{
 
341
    "logging_gearman",
315
342
    "0.1",
316
343
    "Mark Atwood <mark@fallenpegasus.com>",
317
344
    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
 
345
    PLUGIN_LICENSE_GPL,
 
346
    logging_gearman_plugin_init,
 
347
    logging_gearman_plugin_deinit,
 
348
    NULL,   /* status variables */
 
349
    logging_gearman_system_variables,
 
350
    NULL
322
351
}
323
 
DRIZZLE_DECLARE_PLUGIN_END;
 
352
drizzle_declare_plugin_end;