Mercurial > code > home > repos > homeauto

annotate lib/patchablegraph.py @ 223:9236b736bc34

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add new jsonld/SSE support to environment service as a test Ignore-this: ae671e71966dbbb9d1f97e3596802d3d
author drewp@bigasterisk.com
date Sun, 24 Jan 2016 07:12:25 -0800
parents
children 596c645a1fc5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
1 import sys, json
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
2 import cyclone.sse
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
3 sys.path.append("/my/proj/light9")
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
4 from light9.rdfdb.grapheditapi import GraphEditApi
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
5 from rdflib import ConjunctiveGraph
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
6 from light9.rdfdb.rdflibpatch import patchQuads
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
7 from rdflib_jsonld.serializer import from_rdf
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
8
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
9 def writeGraphResponse(req, graph, acceptHeader):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
10 if acceptHeader == 'application/nquads':
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
11 req.set_header('Content-type', 'application/nquads')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
12 graph.serialize(req, format='nquads')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
13 elif acceptHeader == 'application/ld+json':
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
14 req.set_header('Content-type', 'application/ld+json')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
15 graph.serialize(req, format='json-ld', indent=2)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
16 else:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
17 req.set_header('Content-type', 'application/x-trig')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
18 graph.serialize(req, format='trig')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
19
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
20 # forked from /my/proj/light9/light9/rdfdb/rdflibpatch.py
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
21 def graphFromQuads2(q):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
22 g = ConjunctiveGraph()
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
23 #g.addN(q) # no effect on nquad output
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
24 for s,p,o,c in q:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
25 g.get_context(c).add((s,p,o)) # kind of works with broken rdflib nquad serializer code
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
26 #g.store.add((s,p,o), c) # no effect on nquad output
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
27 return g
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
28
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
29 def patchAsJson(p):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
30 return json.dumps({'patch': {
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
31 'adds': from_rdf(graphFromQuads2(p.addQuads)),
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
32 'deletes': from_rdf(graphFromQuads2(p.delQuads)),
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
33 }})
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
34
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
35 class PatchableGraph(GraphEditApi):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
36 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
37 Master graph that you modify with self.patch, and we get the
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
38 updates to all current listeners.
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
39 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
40 def __init__(self):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
41 self._graph = ConjunctiveGraph()
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
42 self._observers = []
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
43
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
44 def serialize(self, to, **kw):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
45 return self._graph.serialize(to, **kw)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
46
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
47 def patch(self, p):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
48 if p.isNoop():
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
49 return
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
50 patchQuads(self._graph,
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
51 deleteQuads=p.delQuads,
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
52 addQuads=p.addQuads,
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
53 perfect=False) # true?
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
54 for ob in self._observers:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
55 ob(patchAsJson(p))
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
56
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
57 def addObserver(self, onPatch):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
58 self._observers.append(onPatch)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
59
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
60 def removeObserver(self, onPatch):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
61 try:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
62 self._observers.remove(onPatch)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
63 except ValueError:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
64 pass
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
65
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
66
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
67
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
68 class GraphEventsHandler(cyclone.sse.SSEHandler):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
69 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
70 One session with one client.
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
71
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
72 returns current graph plus future patches to keep remote version
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
73 in sync with ours.
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
74
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
75 intsead of turning off buffering all over, it may work for this
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
76 response to send 'x-accel-buffering: no', per
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
77 http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_buffering
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
78 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
79 def bind(self):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
80 mg = self.settings.masterGraph
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
81 # todo: needs to be on one line, or else fix cyclone to stripe headers
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
82 self.sendEvent(message=mg.serialize(None, format='json-ld', indent=None), event='fullGraph')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
83 mg.addObserver(self.onPatch)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
84
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
85 def onPatch(self, patchJson):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
86 self.sendEvent(message=patchJson, event='patch')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
87
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
88 def unbind(self):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
89 self.settings.masterGraph.removeObserver(self.onPatch)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
90