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/* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
#include "my_global.h"
#include "my_pthread.h"
#include "table_hosts.h"
#include "pfs_instr_class.h"
#include "pfs_instr.h"
#include "pfs_account.h"
#include "pfs_host.h"
#include "pfs_visitor.h"
THR_LOCK table_hosts::m_table_lock;
static const TABLE_FIELD_TYPE field_types[]=
{
{
{ C_STRING_WITH_LEN("HOST") },
{ C_STRING_WITH_LEN("char(60)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("CURRENT_CONNECTIONS") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TOTAL_CONNECTIONS") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
}
};
TABLE_FIELD_DEF
table_hosts::m_field_def=
{ 3, field_types };
PFS_engine_table_share
table_hosts::m_share=
{
{ C_STRING_WITH_LEN("hosts") },
&pfs_truncatable_acl,
&table_hosts::create,
NULL, /* write_row */
table_hosts::delete_all_rows,
NULL, /* get_row_count */
1000, /* records */
sizeof(PFS_simple_index), /* ref length */
&m_table_lock,
&m_field_def,
false /* checked */
};
PFS_engine_table* table_hosts::create()
{
return new table_hosts();
}
int
table_hosts::delete_all_rows(void)
{
reset_events_waits_by_thread();
reset_events_waits_by_account();
reset_events_waits_by_host();
reset_events_stages_by_thread();
reset_events_stages_by_account();
reset_events_stages_by_host();
reset_events_statements_by_thread();
reset_events_statements_by_account();
reset_events_statements_by_host();
purge_all_account();
purge_all_host();
return 0;
}
table_hosts::table_hosts()
: cursor_by_host(& m_share),
m_row_exists(false)
{}
void table_hosts::make_row(PFS_host *pfs)
{
pfs_lock lock;
m_row_exists= false;
pfs->m_lock.begin_optimistic_lock(&lock);
if (m_row.m_host.make_row(pfs))
return;
PFS_connection_stat_visitor visitor;
PFS_connection_iterator::visit_host(pfs, true, true, & visitor);
if (! pfs->m_lock.end_optimistic_lock(& lock))
return;
m_row.m_connection_stat.set(& visitor.m_stat);
m_row_exists= true;
}
int table_hosts::read_row_values(TABLE *table,
unsigned char *buf,
Field **fields,
bool read_all)
{
Field *f;
if (unlikely(! m_row_exists))
return HA_ERR_RECORD_DELETED;
/* Set the null bits */
DBUG_ASSERT(table->s->null_bytes == 1);
buf[0]= 0;
for (; (f= *fields) ; fields++)
{
if (read_all || bitmap_is_set(table->read_set, f->field_index))
{
switch(f->field_index)
{
case 0: /* HOST */
m_row.m_host.set_field(f);
break;
case 1: /* CURRENT_CONNECTIONS */
case 2: /* TOTAL_CONNECTIONS */
m_row.m_connection_stat.set_field(f->field_index - 1, f);
break;
default:
DBUG_ASSERT(false);
}
}
}
return 0;
}
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