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annotate service/reasoning/inputgraph.py @ 723:b87b6e9cedb2
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Ignore-this: c727f388f197a6fae88595fe6d455c7d
| author | drewp@bigasterisk.com |
|---|---|
| date | Wed, 05 Feb 2020 00:29:13 -0800 |
| parents | 53a2664f450a |
| children | ffcad6bf9c57 |
| rev | line source |
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| 303 | 1 import logging, time, sys |
| 275 | 2 |
| 3 from rdflib import Graph, ConjunctiveGraph | |
| 303 | 4 from rdflib import Namespace, URIRef, Literal, RDF, RDFS |
| 281 | 5 from rdflib.parser import StringInputSource |
| 275 | 6 |
| 7 from twisted.python.filepath import FilePath | |
| 8 from twisted.internet.defer import inlineCallbacks, gatherResults | |
| 9 | |
| 10 from rdflibtrig import addTrig | |
| 11 from graphop import graphEqual | |
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12 from greplin import scales |
| 275 | 13 |
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14 from patchablegraph.patchsource import ReconnectingPatchSource |
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15 from rdfdb.rdflibpatch import patchQuads |
| 303 | 16 |
| 275 | 17 log = logging.getLogger('fetch') |
| 18 | |
| 19 ROOM = Namespace("http://projects.bigasterisk.com/room/") | |
| 20 DEV = Namespace("http://projects.bigasterisk.com/device/") | |
| 21 | |
| 22 | |
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23 STATS = scales.collection('/web', |
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24 scales.PmfStat('combineGraph'), |
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25 ) |
| 281 | 26 def parseRdf(text, contentType): |
| 27 g = Graph() | |
| 28 g.parse(StringInputSource(text), format={ | |
| 29 'text/n3': 'n3', | |
| 30 }[contentType]) | |
| 31 return g | |
| 32 | |
| 33 | |
| 303 | 34 class RemoteData(object): |
| 35 def __init__(self, onChange): | |
| 36 self.onChange = onChange | |
| 37 self.graph = ConjunctiveGraph() | |
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38 self.patchSource = ReconnectingPatchSource( |
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39 URIRef('http://bang:9072/graph/home'), |
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40 #URIRef('http://frontdoor:10012/graph/events'), |
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41 self.onPatch, reconnectSecs=10, agent='reasoning') |
| 303 | 42 |
| 43 def onPatch(self, p, fullGraph): | |
| 44 if fullGraph: | |
| 45 self.graph = ConjunctiveGraph() | |
| 46 patchQuads(self.graph, | |
| 47 deleteQuads=p.delQuads, | |
| 48 addQuads=p.addQuads, | |
| 49 perfect=True) | |
| 50 | |
| 51 ignorePredicates = [ | |
| 52 ROOM['signalStrength'], | |
| 53 # perhaps anything with a number-datatype for its | |
| 54 # object should be filtered out, and you have to make | |
| 55 # an upstream quantization (e.g. 'temp high'/'temp | |
| 56 # low') if you want to do reasoning on the difference | |
| 57 URIRef("http://bigasterisk.com/map#lastSeenAgoSec"), | |
| 58 URIRef("http://bigasterisk.com/map#lastSeenAgo"), | |
| 59 ROOM['usingPower'], | |
| 60 ROOM['idleTimeMinutes'], | |
| 61 ROOM['idleTimeMs'], | |
| 62 ROOM['graphLoadMs'], | |
| 63 ROOM['localTimeToSecond'], | |
| 64 ROOM['history'], | |
| 65 ROOM['connectedAgo'], | |
| 66 RDFS['comment'], | |
| 67 ] | |
| 68 ignoreContexts = [ | |
| 69 URIRef('http://bigasterisk.com/sse_collector/'), | |
| 70 ] | |
| 71 for affected in p.addQuads + p.delQuads: | |
| 72 if (affected[1] not in ignorePredicates and | |
| 73 affected[3] not in ignoreContexts): | |
| 74 log.debug(" remote graph changed") | |
| 75 self.onChange() | |
| 76 break | |
| 77 else: | |
| 78 log.debug(" remote graph has no changes to trigger rules") | |
| 79 | |
| 275 | 80 class InputGraph(object): |
| 303 | 81 def __init__(self, inputDirs, onChange): |
| 275 | 82 """ |
| 83 this has one Graph that's made of: | |
| 84 - all .n3 files from inputDirs (read at startup) | |
| 85 - all the remote graphs, specified in the file graphs | |
| 86 | |
| 87 call updateFileData or updateRemoteData to reread those | |
| 88 graphs. getGraph to access the combined graph. | |
| 89 | |
| 90 onChange(self) is called if the contents of the full graph | |
| 91 change (in an interesting way) during updateFileData or | |
| 92 updateRemoteData. Interesting means statements other than the | |
| 93 ones with the predicates on the boring list. onChange(self, | |
| 94 oneShot=True) means: don't store the result of this change | |
| 95 anywhere; it needs to be processed only once | |
| 96 """ | |
| 97 self.inputDirs = inputDirs | |
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98 self._onChange = onChange |
| 275 | 99 self._fileGraph = Graph() |
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100 self._remoteData = RemoteData(lambda: self.onChangeLocal()) |
| 275 | 101 self._combinedGraph = None |
| 102 self._oneShotAdditionGraph = None | |
| 103 | |
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104 def onChangeLocal(self, oneShot=False, oneShotGraph=None): |
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105 self._combinedGraph = None |
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106 self._onChange(self, oneShot=oneShot, oneShotGraph=oneShotGraph) |
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107 |
| 275 | 108 def updateFileData(self): |
| 109 """ | |
| 110 make sure we contain the correct data from the files in inputDirs | |
| 111 """ | |
| 112 # this sample one is actually only needed for the output, but I don't | |
| 113 # think I want to have a separate graph for the output | |
| 114 # handling | |
| 115 log.debug("read file graphs") | |
| 116 for fp in FilePath("input").walk(): | |
| 117 if fp.isdir(): | |
| 118 continue | |
| 119 if fp.splitext()[1] != '.n3': | |
| 120 continue | |
| 121 log.debug("read %s", fp) | |
| 122 # todo: if this fails, leave the report in the graph | |
| 123 self._fileGraph.parse(fp.open(), format="n3") | |
| 124 self._combinedGraph = None | |
| 125 | |
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126 self.onChangeLocal() |
| 275 | 127 |
| 128 def addOneShot(self, g): | |
| 129 """ | |
| 130 add this graph to the total, call onChange, and then revert | |
| 131 the addition of this graph | |
| 132 """ | |
| 133 self._oneShotAdditionGraph = g | |
| 134 self._combinedGraph = None | |
| 135 try: | |
| 314 | 136 self.onChangeLocal(oneShot=True, oneShotGraph=g) |
| 275 | 137 finally: |
| 138 self._oneShotAdditionGraph = None | |
| 139 self._combinedGraph = None | |
| 140 | |
| 281 | 141 def addOneShotFromString(self, body, contentType): |
| 142 g = parseRdf(body, contentType) | |
| 143 if not len(g): | |
| 144 log.warn("incoming oneshot graph had no statements: %r", body) | |
| 145 return 0 | |
| 146 t1 = time.time() | |
| 147 self.addOneShot(g) | |
| 148 return time.time() - t1 | |
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149 |
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150 @STATS.combineGraph.time() |
| 275 | 151 def getGraph(self): |
| 152 """rdflib Graph with the file+remote contents of the input graph""" | |
| 153 # this could be much faster with the combined readonly graph | |
| 154 # view from rdflib | |
| 155 if self._combinedGraph is None: | |
| 156 self._combinedGraph = Graph() | |
| 157 if self._fileGraph: | |
| 158 for s in self._fileGraph: | |
| 159 self._combinedGraph.add(s) | |
| 303 | 160 for s in self._remoteData.graph: |
| 161 self._combinedGraph.add(s) | |
| 275 | 162 if self._oneShotAdditionGraph: |
| 163 for s in self._oneShotAdditionGraph: | |
| 164 self._combinedGraph.add(s) | |
| 165 | |
| 166 return self._combinedGraph |