sfamainscreen.py

   1
   2 from PyQt4.QtCore import Qt, QString, SIGNAL
   3 from PyQt4.QtGui import QWidget, QLabel, QTreeView, QStandardItemModel, QVBoxLayout, QSizePolicy
   4
   5 from sfa.util.rspecHelper import RSpec
   6
   7 from sfadata import SfaData
   8 from sfascreen import SfaScreen
   9
  10
  11 class SliceWidget(QWidget):
  12     def __init__(self, parent=None):
  13         QWidget.__init__(self, parent)
  14
  15         self.nodeView = QTreeView(self)
  16         self.nodeView.setRootIsDecorated(False)
  17         self.nodeView.setAlternatingRowColors(True)
  18         self.nodeView.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  19
  20         self.nodeModel = QStandardItemModel(0, 3, self)
  21         self.nodeModel.setHeaderData(0, Qt.Horizontal, QString("Testbed"))
  22         self.nodeModel.setHeaderData(1, Qt.Horizontal, QString("Hostname"))
  23         self.nodeModel.setHeaderData(2, Qt.Horizontal, QString("IsIn"))
  24
  25         self.nodeView.setModel(self.nodeModel)
  26
  27         label = QLabel("<a href='refresh'>Refresh</a>", self)
  28         label.setScaledContents(False)
  29         self.connect(label, SIGNAL('linkActivated(QString)'), self.refresh)
  30
  31         # mmhh.
  32         data=SfaData()
  33         slicename = QLabel ("Slice : %s"%(data.getSlice() or "None"),self)
  34
  35         layout = QVBoxLayout()
  36         layout.addWidget(label)
  37         layout.addWidget(slicename)
  38         layout.addWidget(self.nodeView)
  39         self.setLayout(layout)
  40         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  41
  42
  43
  44     # TODO: use the methods from sfa-trunk
  45     def rspec_get_networks(self, rspec_string):
  46         rspec = RSpec (rspec_string)
  47         return rspec.rspec.xpath("./network[@name]/@name")
  48     def rspec_get_xml_nodes_from_network(self, rspec_string, network):
  49         rspec = RSpec (rspec_string)
  50         return rspec.rspec.xpath("./network[@name='%s']/site/node" % network)
  51     def rspec_get_sliver_nodes_from_network(self, rspec_string, network):
  52         rspec = RSpec (rspec_string)
  53         return rspec.rspec.xpath("./network[@name='%s']/site/node[sliver]/hostname/text()" % network)
  54     def rspec_get_other_nodes_from_network(self, rspec_string, network):
  55         rspec = RSpec (rspec_string)
  56         # xxx todo - could not find the xpath syntax for 'does not have the sliver attribute'
  57         return rspec.rspec.xpath("./network[@name='%s']/site/node[~sliver]/hostname/text()" % network)
  58
  59     def refresh(self, link=None):
  60         data = SfaData()
  61         if not data.getSlice():
  62             print 'slice not set yet'
  63             return
  64         if not data.SFACE_DEBUG:
  65             rspec_string = data.getRSpecFromSM()
  66         else:
  67             print 'SFACE_DEBUG : using local file'
  68             import os
  69             rspec_string = open(os.path.expanduser("~/.sfi/%s.rspec"%data.getSlice())).read()
  70
  71         networks = self.rspec_get_networks(rspec_string)
  72         networks.reverse()
  73
  74         for network in networks:
  75 #            nodes = self.rspec_get_sliver_nodes_from_network(rspec_string, network)
  76 #            for node in nodes: self.addNode(network, node, True)
  77 #            nodes = self.rspec_get_other_nodes_from_network(rspec_string, network)
  78 #            for node in nodes: self.addNode(network, node, False)
  79             # hacky - i'm just gettin used to this xml navigation stuff
  80             xml_nodes = self.rspec_get_xml_nodes_from_network(rspec_string, network)
  81             from lxml import etree
  82             # addNode inserts before, so let's start with the ones that are not in
  83             for xml_node in xml_nodes:
  84                 if not xml_node.xpath('sliver'):
  85                     self.addNode(network,xml_node.xpath('hostname/text()')[0],False)
  86             for xml_node in xml_nodes:
  87                 if xml_node.xpath('sliver'):
  88                     self.addNode(network,xml_node.xpath('hostname/text()')[0],True)
  89
  90
  91     def addNode(self, testbed, hostname, mark):
  92         self.nodeModel.insertRow(0)
  93         self.nodeModel.setData(self.nodeModel.index(0,0), QString(testbed))
  94         self.nodeModel.setData(self.nodeModel.index(0,1), QString(hostname))
  95         if mark:msg="x"
  96         else:   msg="-"
  97         self.nodeModel.setData(self.nodeModel.index(0,2), QString(msg))
  98
  99
 100
 101 class SfaMainScreen(SfaScreen):
 102     def __init__(self, parent=None):
 103         SfaScreen.__init__(self, parent)
 104
 105         slice = SliceWidget(self)
 106         self.init(slice, "Main Window", "PlanetLab Federation GUI")
 107         slice.refresh()