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1 from pydbkit.toolbase import SimpleTool |
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2 |
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3 import logging.handlers |
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4 import time |
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5 from datetime import datetime, timedelta |
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6 |
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7 |
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8 class LoopQueryTool(SimpleTool): |
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9 |
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10 """ |
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11 Execute queries in loop, with configurable interval. |
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12 |
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13 """ |
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14 |
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15 def __init__(self): |
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16 SimpleTool.__init__(self, name='loopquery') |
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17 self.target_isolation_level = 'autocommit' |
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18 |
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19 def specify_args(self): |
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20 SimpleTool.specify_args(self) |
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21 self.parser.add_argument('-q', dest='queries', metavar='QUERY', nargs='*', help='Queries to run.') |
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22 self.parser.add_argument('--mins', dest='delay_mins', type=int, help='Delay between queries in minutes.') |
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23 self.parser.add_argument('--secs', dest='delay_secs', type=int, help='Delay between queries in seconds.') |
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24 |
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25 self.config.add_option('queries', type=list, default=[]) |
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26 self.config.add_option('delay_mins', type=int, default=0) |
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27 self.config.add_option('delay_secs', type=int, default=0) |
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28 self.config.add_option('log_path', type=str) |
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29 |
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30 def load_args(self, args=None, config_file=None): |
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31 SimpleTool.load_args(self, args, config_file) |
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32 self.queries = self.args.queries or self.config.queries |
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33 self.delay_mins = self.args.delay_mins or self.config.delay_mins |
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34 self.delay_secs = self.args.delay_secs or self.config.delay_secs |
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35 |
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36 def init_logging(self): |
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37 SimpleTool.init_logging(self) |
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38 if self.config.log_path: |
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39 self.init_file_logs(self.config.log_path) |
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40 |
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41 def init_file_logs(self, path): |
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42 format = logging.Formatter('%(asctime)s %(levelname)-5s %(message)s', '%y-%m-%d %H:%M:%S') |
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43 handler = logging.handlers.TimedRotatingFileHandler(path+'/main.log', when='midnight', backupCount=5) |
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44 handler.setFormatter(format) |
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45 handler.setLevel(logging.DEBUG) |
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46 logging.getLogger('main').addHandler(handler) |
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47 |
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48 format = logging.Formatter('%(asctime)s %(message)s', '%y-%m-%d %H:%M:%S') |
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49 handler = logging.handlers.TimedRotatingFileHandler(path+'/pgnotices.log', when='midnight', backupCount=5) |
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50 handler.setFormatter(format) |
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51 handler.setLevel(logging.DEBUG) |
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52 logging.getLogger('pgmanager_notices').addHandler(handler) |
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53 |
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54 def main(self): |
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55 self.reset() |
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56 while True: |
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57 self.wait() |
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58 self.action() |
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59 |
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60 def reset(self): |
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61 """Check current time, set next action time.""" |
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62 dt = datetime.today() |
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63 dt = dt.replace(microsecond = 0) |
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64 self.next_action_time = dt + timedelta(minutes = self.delay_mins, |
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65 seconds = self.delay_secs) |
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66 |
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67 def wait(self): |
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68 """Wait for action time, compute next action time.""" |
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69 now = datetime.today() |
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70 self.log.debug('Next run %s', self.next_action_time) |
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71 if self.next_action_time > now: |
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72 td = self.next_action_time - now |
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73 self.log.debug('Sleep %ds', td.seconds + td.microseconds/1e6) |
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74 time.sleep(td.seconds + td.microseconds/1e6) |
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75 self.next_action_time += timedelta(minutes = self.delay_mins, |
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76 seconds = self.delay_secs) |
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77 # in case that action took too long and next planned time would |
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78 # be in past -> reset planner |
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79 if self.next_action_time < now: |
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80 self.reset() |
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81 |
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82 def action(self): |
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83 """Execute the queries.""" |
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84 for q in self.queries: |
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85 self.log.info('%s', q) |
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86 with self.pgm.cursor('target') as curs: |
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87 curs.execute(q) |
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88 self.log.info('Done') |
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89 |
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90 |
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91 cls = LoopQueryTool |
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92 |