Mercurial > code > home > repos > homeauto

annotate lib/patchablegraph/patchablegraph.py @ 706:b41247c7b080

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fix text/plain output Ignore-this: 484512f1c81139ef4788680e2ccef973
author drewp@bigasterisk.com
date Mon, 03 Feb 2020 01:10:35 -0800
parents 74ad667f8c5b
children 5b6022beb388
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
1 """
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
2 Design:
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
3
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
4 1. Services each have (named) graphs, which they patch as things
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
5 change. PatchableGraph is an object for holding this graph.
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
6 2. You can http GET that graph, or ...
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
7 3. You can http GET/SSE that graph and hear about modifications to it
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
8 4. The client that got the graph holds and maintains a copy. The
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
9 client may merge together multiple graphs.
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
10 5. Client queries its graph with low-level APIs or client-side sparql.
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
11 6. When the graph changes, the client knows and can update itself at
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
12 low or high granularity.
233
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
13
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
14
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
15 See also:
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
16 * http://iswc2007.semanticweb.org/papers/533.pdf RDFSync: efficient remote synchronization of RDF
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
17 models
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
18 * https://www.w3.org/2009/12/rdf-ws/papers/ws07 Supporting Change Propagation in RDF
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
19 * https://www.w3.org/DesignIssues/lncs04/Diff.pdf Delta: an ontology for the distribution of
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
20 differences between RDF graphs
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
21
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
22 """
514
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
23 import json, logging, itertools
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
24
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
25 from greplin import scales
331
a94f2a522d41 build and import updates for rdfdb, etc
drewp@bigasterisk.com
parents: 298
diff changeset
26 from rdfdb.grapheditapi import GraphEditApi
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
27 from rdflib import ConjunctiveGraph
514
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
28 from rdflib.parser import StringInputSource
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
29 from rdflib_jsonld.serializer import from_rdf
514
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
30 import cyclone.sse
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
31
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
32 from cycloneerr import PrettyErrorHandler
514
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
33 from rdfdb.patch import Patch
495f573af4f4 make patchablegraph release
drewp@bigasterisk.com
parents: 474
diff changeset
34 from rdfdb.rdflibpatch import patchQuads, inGraph
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
35
233
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
36 log = logging.getLogger('patchablegraph')
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
37
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
38 def writeGraphResponse(req, graph, acceptHeader):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
39 if acceptHeader == 'application/nquads':
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
40 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
41 graph.serialize(req, format='nquads')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
42 elif acceptHeader == 'application/ld+json':
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
43 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
44 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
45 else:
703
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
46 print(f'acceptHeader {acceptHeader}')
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
47 if acceptHeader.startswith('text/html'):
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
48 # browser; should arrange to pick live view
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
49 req.set_header('Content-type', 'text/plain')
706
b41247c7b080 fix text/plain output
drewp@bigasterisk.com
parents: 704
diff changeset
50 lines = graph.serialize(None, format='nquads').splitlines()
703
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
51 lines.sort()
706
b41247c7b080 fix text/plain output
drewp@bigasterisk.com
parents: 704
diff changeset
52 req.write(b'\n'.join(lines))
703
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
53 return
83ccc9ba90ea try a text/plain response if we think it's a browser asking for the graph
drewp@bigasterisk.com
parents: 514
diff changeset
54
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
55 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
56 graph.serialize(req, format='trig')
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
57
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
58 # forked from /my/proj/light9/light9/rdfdb/rdflibpatch.py
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
59 def _graphFromQuads2(q):
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
60 g = ConjunctiveGraph()
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
61 #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
62 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
63 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
64 #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
65 return g
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
66
298
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
67 def jsonFromPatch(p):
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
68 return json.dumps({'patch': {
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
69 'adds': from_rdf(_graphFromQuads2(p.addQuads)),
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
70 'deletes': from_rdf(_graphFromQuads2(p.delQuads)),
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
71 }})
298
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
72 patchAsJson = jsonFromPatch # deprecated name
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
73
704
74ad667f8c5b reformat
drewp@bigasterisk.com
parents: 703
diff changeset
74
298
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
75 def patchFromJson(j):
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
76 body = json.loads(j)['patch']
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
77 a = ConjunctiveGraph()
474
drewp@bigasterisk.com
parents: 473
diff changeset
78 a.parse(StringInputSource(json.dumps(body['adds']).encode('utf8')), format='json-ld')
298
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
79 d = ConjunctiveGraph()
474
drewp@bigasterisk.com
parents: 473
diff changeset
80 d.parse(StringInputSource(json.dumps(body['deletes']).encode('utf8')), format='json-ld')
298
8d89da1915df sse_collector now kind of gets concurrent requests right
drewp@bigasterisk.com
parents: 233
diff changeset
81 return Patch(addGraph=a, delGraph=d)
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
82
233
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
83 def graphAsJson(g):
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
84 # This is not the same as g.serialize(format='json-ld')! That
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
85 # version omits literal datatypes.
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
86 return json.dumps(from_rdf(g))
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
87
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
88 _graphsInProcess = itertools.count()
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
89 class PatchableGraph(GraphEditApi):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
90 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
91 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
92 updates to all current listeners.
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
93 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
94 def __init__(self):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
95 self._graph = ConjunctiveGraph()
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
96 self._observers = []
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
97 scales.init(self, '/patchableGraph%s' % next(_graphsInProcess))
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
98
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
99 _serialize = scales.PmfStat('serialize')
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
100 def serialize(self, to, **kw):
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
101 with self._serialize.time():
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
102 return self._graph.serialize(to, **kw)
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
103
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
104 _patch = scales.PmfStat('patch')
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
105 _len = scales.IntStat('statementCount')
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
106 def patch(self, p):
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
107 with self._patch.time():
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
108 # assuming no stmt is both in p.addQuads and p.delQuads.
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
109 dels = set([q for q in p.delQuads if inGraph(q, self._graph)])
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
110 adds = set([q for q in p.addQuads if not inGraph(q, self._graph)])
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
111 minimizedP = Patch(addQuads=adds, delQuads=dels)
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
112 if minimizedP.isNoop():
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
113 return
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
114 patchQuads(self._graph,
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
115 deleteQuads=dels,
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
116 addQuads=adds,
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
117 perfect=False) # true?
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
118 for ob in self._observers:
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
119 ob(patchAsJson(p))
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
120 self._len = len(self._graph)
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
121
233
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
122 def asJsonLd(self):
4ebb5cc30002 server/browser graph sync. cut dependency on the WS version. merge some changes between arduino/pi code.
drewp@bigasterisk.com
parents: 227
diff changeset
123 return graphAsJson(self._graph)
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
124
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
125 _currentObservers = scales.IntStat('observers/current')
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
126 _observersAdded = scales.IntStat('observers/added')
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
127 def addObserver(self, onPatch):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
128 self._observers.append(onPatch)
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
129 self._currentObservers = len(self._observers)
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
130 self._observersAdded += 1
704
74ad667f8c5b reformat
drewp@bigasterisk.com
parents: 703
diff changeset
131
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
132 def removeObserver(self, onPatch):
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
133 try:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
134 self._observers.remove(onPatch)
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
135 except ValueError:
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
136 pass
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
137 self._currentObservers = len(self._observers)
350
a380561fd8a8 add setToGraph
drewp@bigasterisk.com
parents: 331
diff changeset
138
a380561fd8a8 add setToGraph
drewp@bigasterisk.com
parents: 331
diff changeset
139 def setToGraph(self, newGraph):
a380561fd8a8 add setToGraph
drewp@bigasterisk.com
parents: 331
diff changeset
140 self.patch(Patch.fromDiff(self._graph, newGraph))
704
74ad667f8c5b reformat
drewp@bigasterisk.com
parents: 703
diff changeset
141
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
142 _sendSimpleGraph = scales.PmfStat('serve/simpleGraph')
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
143 _sendFullGraph = scales.PmfStat('serve/events/sendFull')
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
144 _sendPatch = scales.PmfStat('serve/events/sendPatch')
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
145
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
146 class CycloneGraphHandler(PrettyErrorHandler, cyclone.web.RequestHandler):
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
147 def initialize(self, masterGraph):
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
148 self.masterGraph = masterGraph
704
74ad667f8c5b reformat
drewp@bigasterisk.com
parents: 703
diff changeset
149
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
150 def get(self):
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
151 with self.masterGraph._sendSimpleGraph.time():
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
152 writeGraphResponse(self, self.masterGraph,
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
153 self.request.headers.get('accept'))
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
154
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
155
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
156 class CycloneGraphEventsHandler(cyclone.sse.SSEHandler):
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
157 """
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
158 One session with one client.
704
74ad667f8c5b reformat
drewp@bigasterisk.com
parents: 703
diff changeset
159
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
160 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
161 in sync with ours.
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
162
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
163 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
164 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
165 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
166 """
224
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
167 def __init__(self, application, request, masterGraph):
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
168 cyclone.sse.SSEHandler.__init__(self, application, request)
596c645a1fc5 refactor /graph and /graph/events handlers to lib/
drewp@bigasterisk.com
parents: 223
diff changeset
169 self.masterGraph = masterGraph
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
170
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
171 def bind(self):
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
172 with self.masterGraph._sendFullGraph.time():
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
173 graphJson = self.masterGraph.asJsonLd()
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
174 log.debug("send fullGraph event: %s", graphJson)
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
175 self.sendEvent(message=graphJson, event=b'fullGraph')
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
176 self.masterGraph.addObserver(self.onPatch)
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
177
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
178 def onPatch(self, patchJson):
473
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
179 with self.masterGraph._sendPatch.time():
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
180 # throttle and combine patches here- ideally we could see how
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
181 # long the latency to the client is to make a better rate choice
388769b5f8ff stats support and maybe a no-op filtering logic change snuck in there
drewp@bigasterisk.com
parents: 429
diff changeset
182 self.sendEvent(message=patchJson, event=b'patch')
704
74ad667f8c5b reformat
drewp@bigasterisk.com
parents: 703
diff changeset
183
223
9236b736bc34 add new jsonld/SSE support to environment service as a test
drewp@bigasterisk.com
parents:
diff changeset
184 def unbind(self):
227
c1b98006f56e fix patchablegraph unbind event
drewp@bigasterisk.com
parents: 224
diff changeset
185 self.masterGraph.removeObserver(self.onPatch)