sface/sfiprocess.py

   1
   2 import os
   3 import sys
   4 import time
   5
   6 from PyQt4.QtCore import *
   7 from sface.config import config
   8 from sface.xmlrpcwindow import XmlrpcTracker
   9
  10 def find_executable(exec_name):
  11     """find the given executable in $PATH"""
  12     paths = os.getenv("PATH").split(':')
  13     for p in paths:
  14         exec_path = os.path.join(p, exec_name)
  15         if os.path.exists(exec_path):
  16             return exec_path
  17     return None
  18
  19
  20 class SfiProcess(QObject):
  21     def __init__(self, parent=None):
  22         QObject.__init__(self, parent)
  23
  24         env = QProcess.systemEnvironment()
  25         env << "PYTHONPATH=%s" % ":".join(sys.path)
  26         self.process = QProcess()
  27         self.process.setEnvironment(env)
  28         self.connect(self.process, SIGNAL("finished(int, QProcess::ExitStatus)"),
  29                      self.processFinished)
  30
  31         self.xmlrpctracker = XmlrpcTracker()
  32
  33         # holds aggregate output from processStandardOutput(); used by xmlrpc
  34         # tracker.
  35         self.output = ""
  36
  37         self.connect(self.process, SIGNAL("readyReadStandardOutput()"),
  38                      self.processStandardOutput)
  39         self.connect(self.process, SIGNAL("readyReadStandardError()"),
  40                      self.processStandardError)
  41
  42     def __init_command(self, args):
  43         self.args = QStringList()
  44         self.args << "-d"
  45         self.args << config.get_dirname()
  46
  47         if config.debug:
  48             # this shows xmlrpc conversation, see sfi.py docs.
  49             self.args << QString('-D')
  50         for arg in args:
  51             self.args << QString(arg)
  52
  53         self.exe = find_executable("sfi.py")
  54         if not self.exe:
  55             print "FATAL.. Could not locate binary sfi.py - not much we can do without that"
  56
  57     def isRunning(self):
  58         return self.process.state() != QProcess.NotRunning
  59
  60     def processStandardOutput(self):
  61         output = self.process.readAllStandardOutput()
  62         self.output = self.output + output
  63         if config.debug:
  64             print output
  65
  66     def processStandardError(self):
  67         print self.process.readAllStandardError()
  68
  69     def processFinished(self):
  70         if self.process.exitStatus() == QProcess.CrashExit:
  71             print self.readOutput()
  72             print "Process exited with errors:",
  73             err = self.process.error()
  74             if err == QProcess.FailedToStart:
  75                 print "FailedToStart"
  76             elif err == QProcess.Crashed:
  77                 print "Crashed"
  78             elif err == QProcess.Timedout:
  79                 print "Timedout"
  80             elif err == QProcess.WriteError:
  81                 print "WriteError"
  82             elif err == QProcess.ReadError:
  83                 print "ReadError"
  84             elif err == QProcess.UnknownError:
  85                 print "UnknownError"
  86         self.trace_end()
  87         self.emit(SIGNAL("finished()"))
  88
  89     def __getRSpec(self, mgr):
  90         slice = config.getSlice()
  91         # Write RSpec to file for testing.
  92         filename = config.fullpath ("%s.rspec"%slice)
  93         try:
  94             os.remove(filename)
  95         except:
  96             pass
  97         args = ["-u", config.getUser(), "-a", config.getAuthority(),
  98                 "-r", config.getRegistry(), "-s", mgr, "resources",
  99                 "-o", filename, slice]
 100
 101         self.__init_command(args)
 102         self.start()
 103         return filename
 104
 105     def getRSpecFromSM(self):
 106         return self.__getRSpec(config.getSlicemgr())
 107
 108 #    def getRSpecFromAM(self):
 109 #        return self.__getRSpec(config.getAggmgr())
 110
 111     def listRecords(self, hrn, rectype=None, filename=None):
 112         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 113                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "list", hrn]
 114
 115         if filename:
 116             # we can't tell whether SFI will create one file or many, so delete
 117             # leftovers from last time, then we'll know what we got, after we get it.
 118             if os.path.exists(filename):
 119                 os.remove(filename)
 120             if os.path.exists(filename + ".1"):
 121                 os.remove(filename + ".1")
 122             args.append("-o")
 123             args.append(filename)
 124
 125         if rectype:
 126             args.append("-t")
 127             args.append(rectype)
 128
 129         self.__init_command(args)
 130         self.start()
 131
 132     def getRecord(self, hrn, filename=None):
 133         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 134                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "show", hrn]
 135         if filename:
 136             args.append("-o")
 137             args.append(filename)
 138         self.__init_command(args)
 139         self.start()
 140
 141     def getSliceRecord(self):
 142         self.getRecord(config.getSlice(), config.getSliceRecordFile())
 143
 144     def getAuthorityRecord(self):
 145         self.getRecord(config.getAuthority(), config.getAuthorityRecordFile())
 146
 147     def applyRSpec(self, rspec):
 148         filename = config.getSliceRSpecFile() + "_new"
 149         rspec.save(filename)
 150         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 151                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "create",
 152                 config.getSlice(), filename]
 153         self.__init_command(args)
 154         self.start()
 155         return filename
 156
 157     def updateRecord(self, filename):
 158         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 159                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "update", filename]
 160         self.__init_command(args)
 161         self.start()
 162
 163     def addRecord(self, filename):
 164         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 165                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "add", filename]
 166         self.__init_command(args)
 167         self.start()
 168
 169     def renewSlivers(self, expiration):
 170         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 171                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "renew",
 172                 config.getSlice(), expiration]
 173         self.__init_command(args)
 174         self.start()
 175
 176     def start(self):
 177         self.output = ""
 178         self.trace_command()
 179         self.process.start(self.exe, self.args)
 180
 181     def readOutput(self):
 182         if self.process.state() == QProcess.NotRunning:
 183             return self.process.readAll()
 184
 185     def trace_command (self):
 186         if config.verbose:
 187             self._trace=time.time()
 188             command = "%s %s" % (self.exe, self.args.join(" "))
 189             print time.strftime('%H:%M:%S'),'Invoking',command
 190
 191     def trace_end (self):
 192         if config.verbose:
 193 #            command = "%s %s" % (self.exe, self.args.join(" "))
 194             print time.strftime('%H:%M:%S'),"Done [%.3f s]"%(time.time()-self._trace)
 195         if config.debug:
 196             self.xmlrpctracker.getAndPrint(self.output)
 197