def __replace_fragment(fid):
"""
Recreate fragment <fid> cached data and all its data-contexts from the corresponding stream (Redis)
:param fid:
:return:
"""
tps = cache.get_context(fid).subjects(RDF.type, AGORA.TriplePattern)
cache.remove_context(cache.get_context("/" + fid))
for tp in tps:
cache.remove_context(cache.get_context(str((fid, __triple_pattern(cache, tp)))))
fragment_triples = load_stream_triples(fid, calendar.timegm(dt.now().timetuple()))
for c, s, p, o in fragment_triples:
cache.get_context(str((fid, c))).add((s, p, o))
cache.get_context("/" + fid).add((s, p, o))
with r.pipeline() as pipe:
pipe.delete("fragments:{}:stream".format(fid))
pipe.execute()
def __cache_plan_context(fid, graph):
"""
Use <graph> to extract the triple patterns of the current fragment <fid> and replace them as the expected context
(triple patterns context) in the cache graph
:param fid:
:param graph:
:return:
"""
try:
fid_context = cache.get_context(fid)
cache.remove_context(fid_context)
tps = graph.subjects(RDF.type, AGORA.TriplePattern)
for tp in tps:
for (s, p, o) in graph.triples((tp, None, None)):
fid_context.add((s, p, o))
for t in graph.triples((o, None, None)):
fid_context.add(t)
except Exception, e:
log.error(e.message)