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#!/usr/bin/env python |
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# coding: utf-8 |
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import logging |
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import os |
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import socket |
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7
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__version__ = '0.1' |
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9
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log = logging.getLogger(__name__) |
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11
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12
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class GrimReaper(object): |
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13
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def __init__(self, socket_path='/tmp/GrimReaper.socket', process_timeout=30): |
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self._path = socket_path |
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self._process_timeout = process_timeout |
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self._connect() |
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def _is_connected(self): |
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try: |
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self._socket.recv(0) |
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except socket.error as e: |
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if e.errno == socket.errno.EAGAIN: |
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return True |
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else: |
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log.debug(e) |
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return self._connect() |
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else: |
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log.debug('Connection is active') |
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return True |
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31
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def _connect(self): |
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32
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self._socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) |
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self._socket.setblocking(0) |
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34
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35
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try: |
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self._socket.connect(self._path) |
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37
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except socket.error as e: |
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# Transport endpoint is already connected |
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if e.errno == 106: |
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40
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return True |
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41
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42
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log.error('Unable to connect to the socket "%s": %s', self._path, e) |
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43
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self.on_connection_error(e) |
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44
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45
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if e.errno == socket.errno.ENOENT: |
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46
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# No such file or directory |
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47
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return False |
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48
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elif e.errno == socket.errno.ECONNREFUSED: |
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# Connection refused |
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50
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return False |
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51
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elif e.errno == socket.errno.EPIPE: |
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# Broken pipe |
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53
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return False |
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54
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55
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raise |
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56
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return True |
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57
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58
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def _close(self): |
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59
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self._socket.close() |
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60
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61
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View Code Duplication |
def register(self, timeout=None, pid=None): |
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62
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if timeout is None: |
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63
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timeout = self._process_timeout |
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64
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65
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if pid is None: |
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66
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pid = os.getpid() |
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67
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68
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if self._is_connected(): |
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69
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msg = 'register:%s:%s' % (pid, timeout) |
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70
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try: |
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71
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self._socket.sendall(msg.encode('utf-8')) |
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72
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except socket.error as e: |
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73
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if e.errno == socket.errno.EPIPE: |
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74
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self._close() |
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75
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return |
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log.debug(e) |
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77
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78
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log.debug('Registered process (PID=%s; timeout=%s)', pid, timeout) |
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79
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else: |
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80
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log.warning('Unable to register the process (PID=%s).', pid) |
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81
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82
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View Code Duplication |
def unregister(self, pid=None): |
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83
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if pid is None: |
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84
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pid = os.getpid() |
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85
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86
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if self._is_connected(): |
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87
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msg = 'unregister:%s' % pid |
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88
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try: |
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89
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self._socket.sendall(msg.encode('utf-8')) |
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90
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except socket.error as e: |
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91
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if e.errno == socket.errno.EPIPE: |
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92
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self._close() |
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93
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return |
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94
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log.debug(e) |
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95
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96
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log.debug('Unregistered process (PID=%s)', pid) |
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97
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else: |
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98
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log.warning('Unable to unregister the process (PID=%s).', pid) |
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99
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100
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def on_connection_error(self, exc): |
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101
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pass |
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102
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matee911 /
GrimReapersPie
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