gaworkflow/copier.py

   1 import ConfigParser
   2 import copy
   3 import logging
   4 import logging.handlers
   5 import os
   6 import re
   7 import subprocess
   8 import sys
   9 import time
  10 import traceback
  11
  12 from benderjab import rpc
  13
  14 def runfolder_validate(fname):
  15     """
  16     Return True if fname looks like a runfolder name
  17     """
  18     if re.match("^[0-9]{6}_[-A-Za-z0-9_]*$", fname):
  19         return True
  20     else:
  21         return False
  22
  23 class rsync(object):
  24   def __init__(self, source, dest, pwfile):
  25     self.pwfile = os.path.expanduser(pwfile)
  26     self.cmd = ['/usr/bin/rsync', ]
  27     self.cmd.append('--password-file=%s' % (self.pwfile))
  28     self.source_base = source
  29     self.dest_base = dest
  30     self.processes = {}
  31     self.exit_code = None
  32
  33   def list(self):
  34     """Get a directory listing"""
  35     dirs_to_copy = []
  36     args = copy.copy(self.cmd)
  37     args.append(self.source_base)
  38
  39     logging.debug("Rsync cmd:" + " ".join(args))
  40     short_process = subprocess.Popen(args, stdout=subprocess.PIPE)
  41     direntries = [ x.split() for x in short_process.stdout ]
  42     for permissions, size, filedate, filetime, filename in direntries:
  43       if permissions[0] == 'd':
  44         # hey its a directory, the first step to being something we want to
  45         # copy
  46         if re.match("[0-9]{6}", filename):
  47           # it starts with something that looks like a 6 digit date
  48           # aka good enough for me
  49           dirs_to_copy.append(filename)
  50     return dirs_to_copy
  51
  52   def create_copy_process(self, dirname):
  53     args = copy.copy(self.cmd)
  54     # we want to copy everything
  55     args.append('-rlt')
  56     # from here
  57     args.append(os.path.join(self.source_base, dirname))
  58     # to here
  59     args.append(self.dest_base)
  60     logging.debug("Rsync cmd:" + " ".join(args))
  61     return subprocess.Popen(args)
  62
  63   def copy(self):
  64     """
  65     copy any interesting looking directories over
  66     return list of items that we started copying.
  67     """
  68     # clean up any lingering non-running processes
  69     self.poll()
  70
  71     # what's available to copy?
  72     dirs_to_copy = self.list()
  73
  74     # lets start copying
  75     started = []
  76     for d in dirs_to_copy:
  77       process = self.processes.get(d, None)
  78
  79       if process is None:
  80         # we don't have a process, so make one
  81         logging.info("rsyncing %s" % (d))
  82         self.processes[d] = self.create_copy_process(d)
  83         started.append(d)
  84     return started
  85
  86   def poll(self):
  87       """
  88       check currently running processes to see if they're done
  89
  90       return path roots that have finished.
  91       """
  92       for dir_key, proc_value in self.processes.items():
  93           retcode = proc_value.poll()
  94           if retcode is None:
  95               # process hasn't finished yet
  96               pass
  97           elif retcode == 0:
  98               logging.info("finished rsyncing %s, exitcode %d" %( dir_key, retcode))
  99               del self.processes[dir_key]
 100           else:
 101               logging.error("rsync failed for %s, exit code %d" % (dir_key, retcode))
 102
 103   def __len__(self):
 104       """
 105       Return how many active rsync processes we currently have
 106
 107       Call poll first to close finished processes.
 108       """
 109       return len(self.processes)
 110
 111   def keys(self):
 112       """
 113       Return list of current run folder names
 114       """
 115       return self.processes.keys()
 116
 117 class CopierBot(rpc.XmlRpcBot):
 118     def __init__(self, section=None, configfile=None):
 119         #if configfile is None:
 120         #    configfile = '~/.gaworkflow'
 121
 122         super(CopierBot, self).__init__(section, configfile)
 123
 124         # options for rsync command
 125         self.cfg['rsync_password_file'] = None
 126         self.cfg['rsync_source'] = None
 127         self.cfg['rsync_destination'] = None
 128
 129         # options for reporting we're done
 130         self.cfg['notify_users'] = None
 131         self.cfg['notify_runner'] = None
 132
 133         self.pending = []
 134         self.rsync = None
 135         self.notify_users = None
 136         self.notify_runner = None
 137
 138         self.register_function(self.startCopy)
 139         self.register_function(self.runFinished)
 140         self.eventTasks.append(self.update)
 141
 142     def read_config(self, section=None, configfile=None):
 143         """
 144         read the config file
 145         """
 146         super(CopierBot, self).read_config(section, configfile)
 147
 148         password = self._check_required_option('rsync_password_file')
 149         source = self._check_required_option('rsync_source')
 150         destination = self._check_required_option('rsync_destination')
 151         self.rsync = rsync(source, destination, password)
 152
 153         self.notify_users = self._parse_user_list(self.cfg['notify_users'])
 154         self.notify_runner = self._parse_user_list(self.cfg['notify_runner'])
 155
 156     def startCopy(self, *args):
 157         """
 158         start our copy
 159         """
 160         logging.info("starting copy scan")
 161         started = self.rsync.copy()
 162         logging.info("copying:" + " ".join(started)+".")
 163         return started
 164
 165     def runFinished(self, runDir, *args):
 166         """
 167         The run was finished, if we're done copying, pass the message on
 168         """
 169         # close any open processes
 170         self.rsync.poll()
 171
 172         # see if we're still copying
 173         if runfolder_validate(runDir):
 174             if runDir in self.rsync.keys():
 175                 # still copying
 176                 self.pending.append(runDir)
 177                 logging.info("%s finished, but still copying" % (runDir))
 178                 return "PENDING"
 179             else:
 180                 # we're done
 181                 self.reportRunFinished(runDir)
 182                 logging.info("%s finished" % (runDir))
 183                 return "DONE"
 184         else:
 185             errmsg = "received bad runfolder name (%s)" % (runDir)
 186             logging.warning(errmsg)
 187             # maybe I should use a different error message
 188             raise RuntimeError(errmsg)
 189
 190     def reportRunFinished(self, runDir):
 191         """
 192         Send the runFinished message to the interested parties
 193         """
 194         if self.notify_users is not None:
 195             for u in self.notify_users:
 196                 self.send(u, 'run %s finished' % (runDir))
 197         if self.notify_runner is not None:
 198             for r in self.notify_runner:
 199                 rpc.send(self.cl, self.runner, (runDir,), 'runFinished')
 200         logging.info("forwarding runFinshed message for %s" % (runDir))
 201
 202     def update(self, *args):
 203         """
 204         Update our current status.
 205         Report if we've finished copying files.
 206         """
 207         self.rsync.poll()
 208         for p in self.pending:
 209             if p not in self.rsync.keys():
 210                 self.reportRunFinished(p)
 211                 self.pending.remove(p)
 212
 213     def _parser(self, msg, who):
 214         """
 215         Parse xmpp chat messages
 216         """
 217         help = u"I can [copy], or report current [status]"
 218         if re.match(u"help", msg):
 219             reply = help
 220         elif re.match("copy", msg):
 221             started = self.startCopy()
 222             reply = u"started copying " + ", ".join(started)
 223         elif re.match(u"status", msg):
 224             msg = [u"Currently %d rsync processes are running." % (len(self.rsync))]
 225             for d in self.rsync.keys():
 226               msg.append(u"  " + d)
 227             reply = os.linesep.join(msg)
 228         else:
 229             reply = u"I didn't understand '%s'"+os.linesep+help % (unicode(msg))
 230         return reply
 231
 232 def main(args=None):
 233     bot = CopierBot()
 234     bot.main(args)
 235
 236 if __name__ == "__main__":
 237   sys.exit(main(sys.argv[1:]))
 238