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annotate service/piNode/piNode.py @ 243:141079644c45

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piNode poll switches much faster. mirror the logic in arduinoNode though vari-rate poll is not supported yet Ignore-this: 4ef38c7a2ed35f77035209bffeffc245
author drewp@bigasterisk.com
date Tue, 02 Feb 2016 22:37:11 -0800
parents 4ebb5cc30002
children 254df9f881a6
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1 from __future__ import division
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2 import sys, logging, socket, json, time, os
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3 import cyclone.web
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4 from rdflib import Namespace, URIRef, Literal, Graph, RDF, ConjunctiveGraph
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5 from rdflib.parser import StringInputSource
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6 from twisted.internet import reactor, task
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7 from docopt import docopt
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8
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9 logging.basicConfig(level=logging.DEBUG)
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10 sys.path.append("/opt/homeauto_lib")
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11 from patchablegraph import PatchableGraph, CycloneGraphHandler, CycloneGraphEventsHandler
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12 from light9.rdfdb.rdflibpatch import inContext
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13 from light9.rdfdb.patch import Patch
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14 sys.path.append('/opt/pigpio')
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15 try:
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16 import pigpio
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17 except ImportError:
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18 class pigpio(object):
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19 @staticmethod
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20 def pi():
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21 return None
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22
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23 import devices
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24
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25 # from /my/proj/room
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26 from carbondata import CarbonClient
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27
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28 log = logging.getLogger()
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29 logging.getLogger('serial').setLevel(logging.WARN)
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30
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31 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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32 HOST = Namespace('http://bigasterisk.com/ruler/host/')
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33
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34 hostname = socket.gethostname()
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35
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36 CTX = ROOM['pi/%s' % hostname]
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37
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38 class Config(object):
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39 def __init__(self, masterGraph):
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40 self.graph = ConjunctiveGraph()
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41 log.info('read config')
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42 for f in os.listdir('config'):
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43 if f.startswith('.'): continue
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44 self.graph.parse('config/%s' % f, format='n3')
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45 self.graph.bind('', ROOM) # not working
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46 self.graph.bind('rdf', RDF)
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47 # config graph is too noisy; maybe make it a separate resource
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48 #masterGraph.patch(Patch(addGraph=self.graph))
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49
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50 class Board(object):
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51 """similar to arduinoNode.Board but without the communications stuff"""
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52 def __init__(self, graph, masterGraph, uri):
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53 self.graph, self.uri = graph, uri
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54 self.masterGraph = masterGraph
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55 self.masterGraph.patch(Patch(addQuads=self.staticStmts()))
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56 self.pi = pigpio.pi()
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57 self._devs = devices.makeDevices(graph, self.uri, self.pi)
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58 log.debug('found %s devices', len(self._devs))
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59 self._statementsFromInputs = {} # input device uri: latest statements
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60 self._lastPollTime = {} # input device uri: time()
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61 self._carbon = CarbonClient(serverHost='bang')
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62 for d in self._devs:
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63 self.syncMasterGraphToHostStatements(d)
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64
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65 def startPolling(self):
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66 task.LoopingCall(self._poll).start(.05)
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67
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68 def _poll(self):
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69 for i in self._devs:
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70 now = time.time()
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71 if (hasattr(i, 'pollPeriod') and
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72 self._lastPollTime.get(i.uri, 0) + i.pollPeriod > now):
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73 continue
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74 new = i.poll()
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75 prev = self._statementsFromInputs.get(i.uri, [])
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76 if new or prev:
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77 self._statementsFromInputs[i.uri] = new
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78 # it's important that quads from different devices
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79 # don't clash, since that can lead to inconsistent
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80 # patches (e.g.
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81 # dev1 changes value from 1 to 2;
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82 # dev2 changes value from 2 to 3;
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83 # dev1 changes from 2 to 4 but this patch will
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84 # fail since the '2' statement is gone)
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85 self.masterGraph.patch(Patch.fromDiff(inContext(prev, i.uri),
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86 inContext(new, i.uri)))
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87 self._lastPollTime[i.uri] = now
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88 self._exportToGraphite()
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89
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90 def _exportToGraphite(self):
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91 # note this is writing way too often- graphite is storing at a lower res
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92 now = time.time()
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93 # 20 sec is not precise; just trying to reduce wifi traffic
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94 if getattr(self, 'lastGraphiteExport', 0) + 20 > now:
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95 return
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96 self.lastGraphiteExport = now
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97 log.debug('graphite export:')
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98 # objects of these statements are suitable as graphite values.
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99 graphitePredicates = {ROOM['temperatureF']}
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100 # bug: one sensor can have temp and humid- this will be ambiguous
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101 for s, graphiteName in self.graph.subject_objects(ROOM['graphiteName']):
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102 for group in self._statementsFromInputs.values():
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103 for stmt in group:
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104 if stmt[0] == s and stmt[1] in graphitePredicates:
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105 log.debug(' sending %s -> %s', stmt[0], graphiteName)
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106 self._carbon.send(graphiteName, stmt[2].toPython(), now)
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107
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108 def outputStatements(self, stmts):
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109 unused = set(stmts)
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110 for dev in self._devs:
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111 stmtsForDev = []
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112 for pat in dev.outputPatterns():
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113 if [term is None for term in pat] != [False, False, True]:
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114 raise NotImplementedError
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115 for stmt in stmts:
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116 if stmt[:2] == pat[:2]:
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117 stmtsForDev.append(stmt)
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118 unused.discard(stmt)
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119 if stmtsForDev:
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120 log.info("output goes to action handler for %s" % dev.uri)
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121 dev.sendOutput(stmtsForDev)
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122
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123 # Dev *could* change hostStatements at any time, and
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124 # we're not currently tracking that, but the usual is
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125 # to change them in response to sendOutput so this
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126 # should be good enough. The right answer is to give
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127 # each dev the masterGraph for it to write to.
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128 self.syncMasterGraphToHostStatements(dev)
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129 log.info("output and masterGraph sync complete")
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130 if unused:
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131 log.info("Board %s doesn't care about these statements:", self.uri)
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132 for s in unused:
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133 log.warn("%r", s)
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134
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135 def syncMasterGraphToHostStatements(self, dev):
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136 hostStmtCtx = URIRef(dev.uri + '/host')
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137 newQuads = inContext(dev.hostStatements(), hostStmtCtx)
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138 p = self.masterGraph.patchSubgraph(hostStmtCtx, newQuads)
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139 log.debug("patch master with these host stmts %s", p)
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140
226
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141 def staticStmts(self):
233
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142 return [(HOST[hostname], ROOM['connectedTo'], self.uri, CTX)]
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143
183
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144 def description(self):
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145 """for web page"""
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146 return {
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147 'uri': self.uri,
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148 'devices': [d.description() for d in self._devs],
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149 'graph': 'http://sticker:9059/graph', #todo
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150 }
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151
233
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152 class Dot(cyclone.web.RequestHandler):
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153 def get(self):
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154 configGraph = self.settings.config.graph
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155 dot = dotrender.render(configGraph, self.settings.boards)
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156 self.write(dot)
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157
184
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158 def rdfGraphBody(body, headers):
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159 g = Graph()
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160 g.parse(StringInputSource(body), format='nt')
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161 return g
183
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162
182
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163 class OutputPage(cyclone.web.RequestHandler):
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164 def put(self):
184
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165 arg = self.request.arguments
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166 if arg.get('s') and arg.get('p'):
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167 subj = URIRef(arg['s'][-1])
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168 pred = URIRef(arg['p'][-1])
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169 turtleLiteral = self.request.body
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170 try:
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171 obj = Literal(float(turtleLiteral))
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172 except ValueError:
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173 obj = Literal(turtleLiteral)
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174 stmt = (subj, pred, obj)
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175 else:
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176 g = rdfGraphBody(self.request.body, self.request.headers)
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177 assert len(g) == 1, len(g)
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178 stmt = g.triples((None, None, None)).next()
182
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179
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180 self.settings.board.outputStatements([stmt])
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181
183
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182 class Boards(cyclone.web.RequestHandler):
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183 def get(self):
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184 self.set_header('Content-type', 'application/json')
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185 self.write(json.dumps({
233
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186 'host': hostname,
183
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187 'boards': [self.settings.board.description()]
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188 }, indent=2))
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189
182
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190 def main():
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191 arg = docopt("""
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192 Usage: piNode.py [options]
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193
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194 -v Verbose
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195 """)
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196 log.setLevel(logging.WARN)
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197 if arg['-v']:
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198 from twisted.python import log as twlog
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199 twlog.startLogging(sys.stdout)
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200
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201 log.setLevel(logging.DEBUG)
233
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202
226
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203 masterGraph = PatchableGraph()
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204 config = Config(masterGraph)
182
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205
233
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206 thisHost = Literal(hostname)
221
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207 for row in config.graph.query(
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208 'SELECT ?board WHERE { ?board a :PiBoard; :hostname ?h }',
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209 initBindings=dict(h=thisHost)):
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210 thisBoard = row.board
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211 break
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212 else:
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213 raise ValueError("config had no board for :hostname %r" % thisHost)
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214
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215 log.info("found config for board %r" % thisBoard)
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216 board = Board(config.graph, masterGraph, thisBoard)
183
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217 board.startPolling()
182
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218
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219 reactor.listenTCP(9059, cyclone.web.Application([
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220 (r"/()", cyclone.web.StaticFileHandler, {
183
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221 "path": "../arduinoNode/static", "default_filename": "index.html"}),
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222 (r'/static/(.*)', cyclone.web.StaticFileHandler, {"path": "../arduinoNode/static"}),
233
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223 (r'/boards', Boards),
226
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224 (r"/graph", CycloneGraphHandler, {'masterGraph': masterGraph}),
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225 (r"/graph/events", CycloneGraphEventsHandler, {'masterGraph': masterGraph}),
182
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226 (r'/output', OutputPage),
233
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227 (r'/dot', Dot),
220
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228 ], config=config, board=board, debug=arg['-v']), interface='::')
182
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229 reactor.run()
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230
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231 main()