sface/sfiprocess.py

   1
   2 import os
   3 import pickle
   4 import sys
   5 import time
   6
   7 from PyQt4.QtCore import *
   8 from sface.config import config
   9 from sface.xmlrpcwindow import get_tracker, XmlrpcReader
  10
  11 def find_executable(exec_name):
  12     """find the given executable in $PATH"""
  13     paths = os.getenv("PATH").split(':')
  14     for p in paths:
  15         exec_path = os.path.join(p, exec_name)
  16         if os.path.exists(exec_path):
  17             return exec_path
  18     return None
  19
  20
  21 class SfiProcess(QObject):
  22     def __init__(self, parent=None):
  23         QObject.__init__(self, parent)
  24
  25         env = QProcess.systemEnvironment()
  26         env << "PYTHONPATH=%s" % ":".join(sys.path)
  27         self.process = QProcess()
  28         self.process.setEnvironment(env)
  29         self.connect(self.process, SIGNAL("finished(int, QProcess::ExitStatus)"),
  30                      self.processFinished)
  31
  32         self.xmlrpcreader = XmlrpcReader() # this one is for parsing XMLRPC responses
  33
  34         # holds aggregate output from processStandardOutput(); used by xmlrpc
  35         # tracker.
  36         self.output = ""
  37
  38         self.connect(self.process, SIGNAL("readyReadStandardOutput()"),
  39                      self.processStandardOutput)
  40         self.connect(self.process, SIGNAL("readyReadStandardError()"),
  41                      self.processStandardError)
  42
  43     def __init_command(self, args):
  44         self.args = QStringList()
  45         self.args << "-d"
  46         self.args << config.get_dirname()
  47
  48         # this shows xmlrpc conversation, see sfi.py docs.
  49         # always do this, so we can parse the XML result for faults and show
  50         # then to the users.
  51         self.args << QString('-D')
  52
  53         for arg in args:
  54             self.args << QString(arg)
  55
  56         self.exe = find_executable("sfi.py")
  57         if not self.exe:
  58             print "FATAL.. Could not locate binary sfi.py - not much we can do without that"
  59
  60     def isRunning(self):
  61         return self.process.state() != QProcess.NotRunning
  62
  63     def processStandardOutput(self):
  64         output = self.process.readAllStandardOutput()
  65         self.output = self.output + output
  66         if config.debug:
  67             print output
  68
  69     def processStandardError(self):
  70         print self.process.readAllStandardError()
  71
  72     def processFinished(self):
  73         if self.process.exitStatus() == QProcess.CrashExit:
  74             print self.readOutput()
  75             print "Process exited with errors:",
  76             err = self.process.error()
  77             if err == QProcess.FailedToStart:
  78                 print "FailedToStart"
  79             elif err == QProcess.Crashed:
  80                 print "Crashed"
  81             elif err == QProcess.Timedout:
  82                 print "Timedout"
  83             elif err == QProcess.WriteError:
  84                 print "WriteError"
  85             elif err == QProcess.ReadError:
  86                 print "ReadError"
  87             elif err == QProcess.UnknownError:
  88                 print "UnknownError"
  89
  90         # extract any faults from the XMLRPC response(s)
  91         self.xmlrpcreader.responses = []
  92         self.xmlrpcreader.store(self.output)
  93         self.xmlrpcreader.extractXml()
  94         self.responses = self.xmlrpcreader.responses
  95         self.faults = [x for x in self.responses if (x["kind"]=="fault")]
  96
  97         self.trace_end()
  98         self.emit(SIGNAL("finished()"))
  99
 100     def getFaultString(self):
 101         if self.faults == []:
 102             return None
 103
 104         return self.faults[0].get("faultString","") + " (" + self.faults[0].get("faultCode","") + ")"
 105
 106     def retrieveRspec(self):
 107         slice = config.getSlice()
 108         mgr = config.getSlicemgr()
 109         # Write RSpec to file
 110         filename = config.fullpath ("%s.rspec"%slice)
 111         try:
 112             os.remove(filename)
 113         except:
 114             pass
 115         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 116                 "-r", config.getRegistry(), "-s", mgr, "resources",
 117                 "-o", filename, slice]
 118
 119         self.__init_command(args)
 120         self.start()
 121         return filename
 122
 123     def retrieveResources(self):
 124         mgr = config.getSlicemgr()
 125         # Write RSpec to file
 126         filename = config.getResourcesRSpecFile()
 127         try:
 128             os.remove(filename)
 129         except:
 130             pass
 131         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 132                 "-r", config.getRegistry(), "-s", mgr, "resources",
 133                 "-o", filename]
 134
 135         self.__init_command(args)
 136         self.start()
 137         return filename
 138
 139
 140     def listRecords(self, hrn, rectype=None, filename=None):
 141         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 142                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "list", "-F", "xmllist", hrn]
 143
 144         if not filename:
 145             filename = config.getAuthorityListFile()
 146
 147         # we can't tell whether SFI will create one file or many, so delete
 148         # leftovers from last time, then we'll know what we got, after we get it.
 149         if os.path.exists(filename):
 150             os.remove(filename)
 151         if os.path.exists(filename + ".1"):
 152             os.remove(filename + ".1")
 153         args.append("-o")
 154         args.append(filename)
 155
 156         if rectype:
 157             args.append("-t")
 158             args.append(rectype)
 159
 160         self.__init_command(args)
 161         self.start()
 162
 163     def getRecord(self, hrn, filename=None):
 164         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 165                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "show", hrn]
 166         if filename:
 167             args.append("-o")
 168             args.append(filename)
 169         self.__init_command(args)
 170         self.start()
 171
 172     def getSliceRecord(self):
 173         self.getRecord(config.getSlice(), config.getSliceRecordFile())
 174
 175     def getAuthorityRecord(self):
 176         self.getRecord(config.getAuthority(), config.getAuthorityRecordFile())
 177
 178     def applyRSpec(self, rspec, aggAddr=None, aggPort=None, saveObtained=True):
 179         # that's what we pass, like in what we'd like to get
 180         requested = config.getSliceRSpecFile() + "_new"
 181         # that's what we actually receive
 182         # just overwrite the slice file as if we'd used 'resources'
 183         obtained = config.getSliceRSpecFile()
 184         rspec.save(requested)
 185         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 186                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "create"]
 187
 188         if saveObtained:
 189             args = args + ["-o", obtained]
 190
 191         if aggAddr:
 192             args = args + ["-a", aggAddr, "-p", str(aggPort)]
 193
 194         args = args + [config.getSlice(), requested]
 195
 196         self.__init_command(args)
 197         self.start()
 198
 199     def deleteSlivers(self, slice=None, aggAddr=None, aggPort=None):
 200         if not slice:
 201             slice = config.getSlice()
 202
 203         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 204                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "delete"]
 205
 206         if aggAddr:
 207             args = args + ["-a", aggAddr, "-p", str(aggPort)]
 208
 209         args = args + [slice]
 210
 211         self.__init_command(args)
 212         self.start()
 213
 214     def updateRecord(self, filename):
 215         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 216                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "update", filename]
 217         self.__init_command(args)
 218         self.start()
 219
 220     def addRecord(self, filename):
 221         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 222                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "add", filename]
 223         self.__init_command(args)
 224         self.start()
 225
 226     def removeRecord(self, hrn):
 227         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 228                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "remove", hrn]
 229         self.__init_command(args)
 230         self.start()
 231
 232     def renewSlivers(self, expiration, slice=None):
 233         if not slice:
 234             slice = config.getSlice()
 235
 236         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 237                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "renew",
 238                 slice, expiration]
 239         self.__init_command(args)
 240         self.start()
 241
 242     def sliverStatus(self, slice=None, filename=None):
 243         if not slice:
 244             slice = config.getSlice()
 245
 246         if not filename:
 247             filename = config.fullpath(slice+".sliverstatus")
 248
 249         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 250                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "status",
 251                 "-o", filename, "-F", "pickled", slice]
 252         self.__init_command(args)
 253         self.start()
 254
 255     def getSliceMgrVersion(self, filename=None):
 256         if not filename:
 257             filename = config.fullpath("slicemgr.version")
 258
 259         args = ["-u", config.getUser(), "-a", config.getAuthority(),
 260                 "-r", config.getRegistry(), "-s", config.getSlicemgr(), "version",
 261                 "-o", filename, "-F", "pickled",]
 262         self.__init_command(args)
 263         self.start()
 264
 265     def start(self):
 266         self.respones = []
 267         self.faults = []
 268         self.output = ""
 269         self.trace_command()
 270         self.process.start(self.exe, self.args)
 271
 272     def readOutput(self):
 273         if self.process.state() == QProcess.NotRunning:
 274             return self.process.readAll()
 275
 276     def trace_command (self):
 277         if config.verbose:
 278             self._trace=time.time()
 279             command = "%s %s" % (self.exe, self.args.join(" "))
 280             print time.strftime('%H:%M:%S'),'Invoking',command
 281
 282     def trace_end (self):
 283         if config.verbose:
 284 #            command = "%s %s" % (self.exe, self.args.join(" "))
 285             print time.strftime('%H:%M:%S'),"Done [%.3f s]"%(time.time()-self._trace)
 286         if config.debug:
 287             get_tracker().getAndPrint(self.output)
 288