pgtoolkit/delayedquery.py
author Radek Brich <radek.brich@devl.cz>
Fri, 25 Nov 2011 18:17:27 +0100
changeset 18 a9e12b7cc207
permissions -rw-r--r--
Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
18
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     1
import threading
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     2
import time
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     3
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     4
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     5
class DelayedQueryThread(threading.Thread):
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     6
    def __init__(self, targetdbm, targetname, delay, query, args):
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     7
        threading.Thread.__init__(self)
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     8
        self.targetdbm = targetdbm
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
     9
        self.targetname = targetname
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    10
        self.delay = delay
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    11
        self.query = query
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    12
        self.args = args
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    13
        
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    14
    def run(self):
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    15
        time.sleep(self.delay)
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    16
        with self.targetdbm.cursor(self.targetname) as curs:
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    17
            curs.execute(self.query, self.args)
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    18
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    19
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    20
class DelayedQuery:
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    21
    def __init__(self, targetdbm):
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    22
        '''Initialize DelayedQuery.
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    23
        
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    24
        targetdbm -- PgManager-like object
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    25
        
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    26
        '''
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    27
        self.targetdbm = targetdbm
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    28
        self.queryids = set()
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    29
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    30
    def add(self, delay, query, args, targetname='default', queryid=None):
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    31
        '''Add query to schedule.
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    32
        
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    33
        delay -- how long to wait, in seconds
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    34
        query, args -- query to be run after delay
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    35
        targetname -- name of connection in PgManager
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    36
        queryid -- discard if query with same id is already scheduled
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    37
        
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    38
        '''
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    39
        if queryid is not None:
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    40
            if queryid in self.queryids:
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    41
                return
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    42
            self.queryids.add(queryid)
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    43
        
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    44
        t = DelayedQueryThread(self.targetdbm, targetname, delay, query, args)
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    45
        t.start()
a9e12b7cc207 Fix MyManager. Add patch for MySQLdb and Python3.2. Add DelayedQuery.
Radek Brich <radek.brich@devl.cz>
parents:
diff changeset
    46