Created
June 9, 2012 19:10
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kill process with mysqldb query
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#!/usr/bin/python | |
# coding: UTF-8 | |
import MySQLdb | |
import signal, os, sys | |
workers = {} | |
END_SIGNAL = "\n" | |
def connect(): | |
con = MySQLdb.connect(host='localhost', db='test', user='testuser', passwd='password') | |
return con | |
def get_mysql_pid(con): | |
cur = con.cursor() | |
cur.execute('SELECT CONNECTION_ID()') #自分自身のmysqlセッションを取得 | |
return cur.fetchall()[0][0] | |
def kill_mysql_pid(con,mysql_pid): | |
cur = con.cursor() | |
cur.execute('KILL ' + mysql_pid) #mysqlセッションをKILL | |
def run(con, query): | |
signal.signal(signal.SIGTERM, lambda sig, status: sys.exit(0)) | |
cur = con.cursor() | |
cur.execute(query) | |
def killall(sig, status): | |
con = connect() | |
for pid in workers.keys(): | |
kill_mysql_pid(con,workers[pid]) #子プロセスのmysqlセッションをKILLする | |
os.kill(pid, signal.SIGTERM) | |
def waitall(): | |
for pid in workers.keys(): | |
try: | |
os.waitpid(pid, 0) | |
except: | |
print "waitpid: interrupted exception" | |
def main(): | |
signal.signal(signal.SIGINT, killall) | |
signal.signal(signal.SIGTERM, killall) | |
r_num, w_num = os.pipe() | |
pid = os.fork() | |
if pid == 0: | |
os.close(r_num) | |
wpipe = os.fdopen(w_num, 'w') | |
con = connect() | |
mysql_pid = "%d\n" % get_mysql_pid(con) #親プロセスへ子プロセスのmysqlセッションidを送る | |
wpipe.write(mysql_pid) | |
wpipe.flush() | |
try: | |
run(con, "SELECT SLEEP(30)") | |
except: | |
print "run: interrupted exception" | |
sys.exit(0) | |
else: | |
os.close(w_num) | |
rpipe = os.fdopen(r_num, 'r') | |
mysql_pid = rpipe.readline() | |
mysql_pid = mysql_pid[:-1] | |
workers[pid] = mysql_pid #子プロセスのmysqlセッションidを保存しておく | |
print workers[pid] | |
waitall() | |
if __name__ == '__main__': | |
main() |
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