def _updateMasterWithNewPollStatements(self, dev, new):
prev = self._statementsFromInputs.get(dev, set())
# it's important that quads from different devices
# don't clash, since that can lead to inconsistent
# patches (e.g.
# dev1 changes value from 1 to 2;
# dev2 changes value from 2 to 3;
# dev1 changes from 2 to 4 but this patch will
# fail since the '2' statement is gone)
self.masterGraph.patch(Patch.fromDiff(inContext(prev, dev),
inContext(new, dev)))
self._statementsFromInputs[dev] = new
def _updateMasterWithNewPollStatements(self, dev, new):
prev = self._statementsFromInputs.get(dev, set())
# it's important that quads from different devices
# don't clash, since that can lead to inconsistent
# patches (e.g.
# dev1 changes value from 1 to 2;
# dev2 changes value from 2 to 3;
# dev1 changes from 2 to 4 but this patch will
# fail since the '2' statement is gone)
self.masterGraph.patch(Patch.fromDiff(inContext(prev, dev),
inContext(new, dev)))
self._statementsFromInputs[dev] = new
def reread(self) -> None:
"""update the graph with any diffs from this file
n3 parser fails on "1.e+0" even though rdflib was emitting that itself
"""
old = self.getSubgraph(self.uri)
new = Graph()
try:
contents = open(self.path).read()
if contents.startswith("#new"):
log.debug("%s ignoring empty contents of my new file",
self.path)
# this is a new file we're starting, and we should not
# patch our graph as if it had just been cleared. We
# shouldn't even be here reading this, but
# lastWriteTimestamp didn't work.
return
new.parse(location=self.path, format='n3')
self.readPrefixes = dict(new.namespaces())
except SyntaxError as e:
print(e)
traceback.print_exc()
log.error("%s syntax error", self.path)
# todo: likely bug- if a file has this error upon first
# read, I think we don't retry it right.
return
except IOError as e:
log.error("%s rereading %s: %r", self.path, self.uri, e)
return
old = inContext(old, self.uri)
new = inContext(new, self.uri)
p = Patch.fromDiff(old, new)
if p:
log.debug("%s applying patch for changes in file", self.path)
self.patch(p, dueToFileChange=True)
else:
log.debug("old == new after reread of %s", self.path)