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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008,2009 Sun Microsystems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <drizzled/server_includes.h>
#include <drizzled/plugin/logging_handler.h>
#include <drizzled/gettext.h>
#include <drizzled/session.h>
#include <libgearman/gearman.h>
/* TODO make this dynamic as needed */
static const int MAX_MSG_LEN= 32*1024;
static bool sysvar_logging_gearman_enable= false;
static char* sysvar_logging_gearman_host= NULL;
static char* sysvar_logging_gearman_function= NULL;
/* stolen from mysys/my_getsystime
until the Session has a good utime "now" we can use
will have to use this instead */
#include <sys/time.h>
static uint64_t get_microtime()
{
#if defined(HAVE_GETHRTIME)
return gethrtime()/1000;
#else
uint64_t newtime;
struct timeval t;
/*
The following loop is here because gettimeofday may fail on some systems
*/
while (gettimeofday(&t, NULL) != 0) {}
newtime= (uint64_t)t.tv_sec * 1000000 + t.tv_usec;
return newtime;
#endif /* defined(HAVE_GETHRTIME) */
}
/* quote a string to be safe to include in a CSV line
that means backslash quoting all commas, doublequotes, backslashes,
and all the ASCII unprintable characters
as long as we pass the high-bit bytes unchanged
this is safe to do to a UTF8 string
we dont allow overrunning the targetbuffer
to avoid having a very long query overwrite memory
TODO consider remapping the unprintables instead to "Printable
Representation", the Unicode characters from the area U+2400 to
U+2421 reserved for representing control characters when it is
necessary to print or display them rather than have them perform
their intended function.
*/
static unsigned char *quotify (const unsigned char *src, size_t srclen,
unsigned char *dst, size_t dstlen)
{
static const char hexit[]= { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
size_t dst_ndx; /* ndx down the dst */
size_t src_ndx; /* ndx down the src */
assert(dst);
assert(dstlen > 0);
for (dst_ndx= 0,src_ndx= 0; src_ndx < srclen; src_ndx++)
{
/* Worst case, need 5 dst bytes for the next src byte.
backslash x hexit hexit null
so if not enough room, just terminate the string and return
*/
if ((dstlen - dst_ndx) < 5)
{
dst[dst_ndx]= (unsigned char)0x00;
return dst;
}
if (src[src_ndx] > 0x7f)
{
// pass thru high bit characters, they are non-ASCII UTF8 Unicode
dst[dst_ndx++]= src[src_ndx];
}
else if (src[src_ndx] == 0x00) // null
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) '0';
}
else if (src[src_ndx] == 0x07) // bell
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'a';
}
else if (src[src_ndx] == 0x08) // backspace
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'b';
}
else if (src[src_ndx] == 0x09) // horiz tab
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 't';
}
else if (src[src_ndx] == 0x0a) // line feed
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'n';
}
else if (src[src_ndx] == 0x0b) // vert tab
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'v';
}
else if (src[src_ndx] == 0x0c) // formfeed
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'f';
}
else if (src[src_ndx] == 0x0d) // carrage return
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'r';
}
else if (src[src_ndx] == 0x1b) // escape
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= (unsigned char) 'e';
}
else if (src[src_ndx] == 0x22) // quotation mark
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= 0x22;
}
else if (src[src_ndx] == 0x2C) // comma
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= 0x2C;
}
else if (src[src_ndx] == 0x5C) // backslash
{
dst[dst_ndx++]= 0x5C; dst[dst_ndx++]= 0x5C;
}
else if ((src[src_ndx] < 0x20) || (src[src_ndx] == 0x7F)) // other unprintable ASCII
{
dst[dst_ndx++]= 0x5C;
dst[dst_ndx++]= (unsigned char) 'x';
dst[dst_ndx++]= hexit[(src[src_ndx] >> 4) & 0x0f];
dst[dst_ndx++]= hexit[src[src_ndx] & 0x0f];
}
else // everything else
{
dst[dst_ndx++]= src[src_ndx];
}
dst[dst_ndx]= '\0';
}
return dst;
}
class LoggingGearman : public Logging_handler
{
int gearman_client_ok;
gearman_client_st gearman_client;
public:
LoggingGearman() : Logging_handler("LoggingGearman"), gearman_client_ok(0)
{
gearman_return_t ret;
if (sysvar_logging_gearman_enable == false)
return;
if (sysvar_logging_gearman_host == NULL)
return;
if (gearman_client_create(&gearman_client) == NULL)
{
errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_create(): %s"),
strerror(errno));
return;
}
/* TODO, be able to override the port */
/* TODO, be able send to multiple servers */
ret= gearman_client_add_server(&gearman_client,
sysvar_logging_gearman_host, 0);
if (ret != GEARMAN_SUCCESS)
{
errmsg_printf(ERRMSG_LVL_ERROR, _("fail gearman_client_add_server(): %s"),
gearman_client_error(&gearman_client));
return;
}
gearman_client_ok= 1;
}
~LoggingGearman()
{
if (gearman_client_ok)
{
gearman_client_free(&gearman_client);
}
}
virtual bool post(Session *session)
{
char msgbuf[MAX_MSG_LEN];
int msgbuf_len= 0;
assert(session != NULL);
/* in theory, we should return "true", meaning that the plugin isn't happy,
but that crashes the server, so for now, we just lie a little bit
*/
if (!gearman_client_ok)
return false;
/* TODO, looks like connect_utime isnt being set in the session
object. We could store the time this plugin was loaded, but that
would just be a dumb workaround. */
/* TODO, the session object should have a "utime command completed"
inside itself, so be more accurate, and so this doesnt have to
keep calling current_utime, which can be slow */
uint64_t t_mark= get_microtime();
// buffer to quotify the query
unsigned char qs[255];
// to avoid trying to printf %s something that is potentially NULL
const char *dbs= (session->db) ? session->db : "";
int dbl= 0;
if (dbs != NULL)
dbl= session->db_length;
// todo, add hostname, listener port, and server id to this
msgbuf_len=
snprintf(msgbuf, MAX_MSG_LEN,
"%"PRIu64",%"PRIu64",%"PRIu64",\"%.*s\",\"%s\",\"%.*s\","
"%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64",%"PRIu64
"%"PRIu32",%"PRIu32"",
t_mark,
session->thread_id,
session->query_id,
// dont need to quote the db name, always CSV safe
dbl, dbs,
// do need to quote the query
quotify((unsigned char *)session->query,
session->query_length, qs, sizeof(qs)),
// command_name is defined in drizzled/sql_parse.cc
// dont need to quote the command name, always CSV safe
(int)command_name[session->command].length,
command_name[session->command].str,
// counters are at end, to make it easier to add more
(t_mark - session->connect_utime),
(t_mark - session->start_utime),
(t_mark - session->utime_after_lock),
session->sent_row_count,
session->examined_row_count,
session->tmp_table,
session->total_warn_count);
char job_handle[GEARMAN_JOB_HANDLE_SIZE];
(void) gearman_client_do_background(&gearman_client,
sysvar_logging_gearman_function,
NULL,
(void *) msgbuf,
(size_t) msgbuf_len,
job_handle);
return false;
}
};
static Logging_handler *handler= NULL;
static int logging_gearman_plugin_init(PluginRegistry ®istry)
{
handler= new LoggingGearman();
registry.add(handler);
return 0;
}
static int logging_gearman_plugin_deinit(PluginRegistry ®istry)
{
registry.remove(handler);
delete(handler);
return 0;
}
static DRIZZLE_SYSVAR_BOOL(
enable,
sysvar_logging_gearman_enable,
PLUGIN_VAR_NOCMDARG,
N_("Enable logging to a gearman server"),
NULL, /* check func */
NULL, /* update func */
false /* default */);
static DRIZZLE_SYSVAR_STR(
host,
sysvar_logging_gearman_host,
PLUGIN_VAR_READONLY,
N_("Hostname for logging to a Gearman server"),
NULL, /* check func */
NULL, /* update func*/
"localhost" /* default */);
static DRIZZLE_SYSVAR_STR(
function,
sysvar_logging_gearman_function,
PLUGIN_VAR_READONLY,
N_("Gearman Function to send logging to"),
NULL, /* check func */
NULL, /* update func*/
"drizzlelog" /* default */);
static struct st_mysql_sys_var* logging_gearman_system_variables[]= {
DRIZZLE_SYSVAR(enable),
DRIZZLE_SYSVAR(host),
DRIZZLE_SYSVAR(function),
NULL
};
drizzle_declare_plugin(logging_gearman)
{
"logging_gearman",
"0.1",
"Mark Atwood <mark@fallenpegasus.com>",
N_("Log queries to a Gearman server"),
PLUGIN_LICENSE_GPL,
logging_gearman_plugin_init,
logging_gearman_plugin_deinit,
NULL, /* status variables */
logging_gearman_system_variables,
NULL
}
drizzle_declare_plugin_end;
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