def update_dataset_archives(sender, update_definition, store_graphs, when, **kwargs):
for store in store_graphs:
graph_names = store_graphs[store]
endpoint = Endpoint(store.query_endpoint)
if DATASET_NOTATION:
notation_clause = """
OPTIONAL {{ ?dataset skos:notation ?notation .
FILTER (DATATYPE(?notation) = {0} ) }}""".format(DATASET_NOTATION.n3())
else:
notation_clause = ""
query = """
SELECT ?dataset ?notation WHERE {{
VALUES ?graph {{ {0} }}
?graph void:inDataset ?dataset .
{1}
}}""".format(" ".join(g.n3() for g in graph_names),
notation_clause)
datasets = dict(endpoint.query(query))
logger.debug("Found %d datasets to archive", len(datasets))
for dataset in datasets:
logger.debug("Archiving dataset: %s", dataset)
notation = datasets[dataset]
archiver = DatasetArchiver(store, dataset, notation, when)
archiver.archive()
def execute(self, transform_manager, input):
transform_manager.start(self, [input])
logger.debug("Starting upload of %r", input)
client = self.get_redis_client()
extension = input.rsplit('.', 1)[-1]
try:
serializer = self.formats[extension]
except KeyError:
logger.exception("Unrecognized RDF extension: %r", extension)
raise
graph = rdflib.ConjunctiveGraph()
graph.parse(open(input, 'r'),
format=serializer,
publicID=self.graph_name)
logger.debug("Parsed graph")
datetime_now = self.site_timezone.localize(datetime.datetime.now().replace(microsecond=0))
modified = graph.value(self.graph_name, NS['dcterms'].modified,
default=rdflib.Literal(datetime_now))
created = graph.value(self.graph_name, NS['dcterms'].created)
if not created:
logger.debug("Getting created date from %r", transform_manager.store.query_endpoint)
endpoint = Endpoint(transform_manager.store.query_endpoint)
results = list(endpoint.query(self.created_query % {'graph': self.graph_name.n3()}))
if results:
created = results[0].date
else:
created = modified
graph += (
(self.graph_name, NS['dcterms'].modified, modified),
(self.graph_name, NS['dcterms'].created, created),
)
logger.debug("About to serialize")
output = transform_manager('rdf')
with open(output, 'w') as f:
graph.serialize(f)
logger.debug("Serialization done; about to upload")
uploader = Uploader()
uploader.upload(stores=(transform_manager.store,),
graph_name=self.graph_name,
filename=output,
method=self.method,
mimetype='application/rdf+xml')
logger.debug("Upload complete")
transform_manager.end([self.graph_name])
transform_manager.touched_graph(self.graph_name)
def execute(self, transform_manager):
endpoint = Endpoint(transform_manager.store.query_endpoint, preferred_media_types=('text/plain',))
if isinstance(self.query, basestring):
query = self.query
else:
query_filename = self.query.execute(transform_manager)
with open(query_filename, 'r') as query_file:
query = query_file.read()
with open(transform_manager('nt'), 'w') as output:
transform_manager.start(self, [])
serialize(endpoint.query(query, defer=True), output)
transform_manager.end([output.name])
return output.name
def execute(self, transform_manager):
endpoint = Endpoint(transform_manager.store.query_endpoint,
preferred_media_types=('text/plain', ))
if isinstance(self.query, basestring):
query = self.query
else:
query_filename = self.query.execute(transform_manager)
with open(query_filename, 'r') as query_file:
query = query_file.read()
with open(transform_manager('nt'), 'w') as output:
transform_manager.start(self, [])
serialize(endpoint.query(query, defer=True), output)
transform_manager.end([output.name])
return output.name
def update_dataset_archives(update_log, graphs, updated):
if not getattr(settings, 'ARCHIVE_PATH', None):
return
updated = updated.replace(microsecond=0)
for store_slug in graphs:
store = Store.objects.get(slug=store_slug)
graph_names = graphs[store.slug]
endpoint = Endpoint(store.query_endpoint)
query = "SELECT ?dataset WHERE { %s }" % " UNION ".join("{ %s void:inDataset ?dataset }" % g.n3() for s, g in graph_names if s is None)
datasets = set(r['dataset'] for r in endpoint.query(query))
for dataset in datasets:
query = "SELECT ?graph WHERE { ?graph void:inDataset %s }" % dataset.n3()
graphs = set(r['graph'] for r in endpoint.query(query))
update_dataset_archive(dataset, store, graph_names, updated)
def update_for_store(self, index, store):
hash_key = 'humfrey:elasticsearch:indices:%s:%s' % (index.slug, store.slug)
endpoint = Endpoint(store.query_endpoint)
results = endpoint.query(index.query)
try:
urllib2.urlopen(index.get_index_status_url(store))
index_exists = True
except urllib2.HTTPError, e:
if e.code == httplib.NOT_FOUND:
index_exists = False
index.update_mapping = True
request = urllib2.Request(index.get_index_url(store))
request.get_method = lambda: 'PUT'
urllib2.urlopen(request)
else:
raise
def execute(self, transform_manager):
endpoint = Endpoint(transform_manager.store.query_endpoint)
if isinstance(self.query, basestring):
query = self.query
else:
query_filename = self.query.execute(transform_manager)
with open(query_filename, 'r') as query_file:
query = query_file.read()
with open(transform_manager('nt'), 'w') as output:
transform_manager.start(self, [])
result = endpoint.query(query)
result.serialize(output, 'nt')
transform_manager.end([output.name])
return output.name
class DatasetArchiver(object):
def __init__(self, store, dataset, notation, updated):
self.store = store
self.dataset = dataset
self.notation = notation
self.updated = updated.replace(microsecond=0)
self.endpoint = Endpoint(store.query_endpoint)
@property
def graph_names(self):
if not hasattr(self, '_graphs'):
query = "SELECT ?graph WHERE {{ ?graph void:inDataset/^void:subset* {0} }}".format(self.dataset.n3())
self._graphs = set(r['graph'] for r in self.endpoint.query(query))
return self._graphs
def _graph_created(self, graph_name):
query = "SELECT ?created WHERE {{ {0} dcterms:created ?created }}".format(graph_name.n3())
results = self.endpoint.query(query)
if results:
return results[0].created
else:
return rdflib.Literal(self.updated)
def _graph_triples(self, out, graph_name):
url = '%s?%s' % (self.store.graph_store_endpoint,
urllib.urlencode({'graph': graph_name}))
request = urllib2.Request(url)
request.add_header('Accept', 'text/plain')
try:
response = urllib2.urlopen(request)
except urllib2.HTTPError, e:
if e.code == 404:
logger.warning("Graph not found: %s", graph_name)
else:
logger.exception("HTTPError %d for %s: %s", e.code, graph_name, e.read())
return
while True:
chunk = response.read(4096)
if not chunk:
break
out.write(chunk)
def update_for_store(self, index, store):
hash_key = 'humfrey:elasticsearch:indices:%s:%s' % (index.slug, store.slug)
endpoint = Endpoint(store.query_endpoint)
logger.debug("Performing SPARQL query.", extra={'query': index.query})
results = endpoint.query(index.query, defer=True).get_bindings()
logger.debug("SPARQL server started returning results.")
try:
urllib2.urlopen(index.get_index_status_url(store))
index_exists = True
except urllib2.HTTPError, e:
if e.code == httplib.NOT_FOUND:
logger.info("Index %s/%s did not previously exist", store.slug, index.slug)
index_exists = False
index.update_mapping = True
request = urllib2.Request(index.get_index_url(store))
request.get_method = lambda: 'PUT'
urllib2.urlopen(request)
else:
raise
def endpoint(self):
if not hasattr(self, '_endpoint'):
if isinstance(self, ContentNegotiatedView):
self.set_renderers(early=True)
preferred_media_types = [
m.value for r in self.request.renderers
for m in r.mimetypes
]
else:
preferred_media_types = ()
self._endpoint = Endpoint(
self.store.query_endpoint,
preferred_media_types=preferred_media_types)
return self._endpoint
def update_for_store(self, index, store):
hash_key = 'humfrey:elasticsearch:indices:%s:%s' % (index.slug,
store.slug)
endpoint = Endpoint(store.query_endpoint)
logger.debug("Performing SPARQL query.", extra={'query': index.query})
results = endpoint.query(index.query, defer=True).get_bindings()
logger.debug("SPARQL server started returning results.")
try:
urllib2.urlopen(index.get_index_status_url(store))
index_exists = True
except urllib2.HTTPError, e:
if e.code == httplib.NOT_FOUND:
logger.info("Index %s/%s did not previously exist", store.slug,
index.slug)
index_exists = False
index.update_mapping = True
request = urllib2.Request(index.get_index_url(store))
request.get_method = lambda: 'PUT'
urllib2.urlopen(request)
else:
raise
def execute(self, transform_manager, input):
transform_manager.start(self, [])
endpoint = Endpoint(transform_manager.store.query_endpoint)
for normalization in self.normalizations:
normalization.endpoint = endpoint
normalization.store = transform_manager.store
while self.normalizations:
with open(input, 'r') as source:
pipeline = parse(source).get_triples()
for normalization in self.normalizations:
pipeline = normalization(pipeline)
with open(transform_manager('rdf'), 'w') as target:
serialize(pipeline, target)
input = target.name
self.normalizations = [
n for n in self.normalizations if not n.done
]
return input
def execute(self, transform_manager, input):
transform_manager.start(self, [input])
logger.debug("Starting upload of %r", input)
extension = input.rsplit('.', 1)[-1]
try:
serializer = self.formats[extension]
except KeyError:
logger.exception("Unrecognized RDF extension: %r", extension)
raise
graph = rdflib.ConjunctiveGraph()
graph.parse(open(input, 'r'),
format=serializer,
publicID=self.graph_name)
logger.debug("Parsed graph")
datetime_now = self.site_timezone.localize(
datetime.datetime.now().replace(microsecond=0))
modified = graph.value(self.graph_name,
NS['dcterms'].modified,
default=rdflib.Literal(datetime_now))
created = graph.value(self.graph_name, NS['dcterms'].created)
if not created:
logger.debug("Getting created date from %r",
transform_manager.store.query_endpoint)
endpoint = Endpoint(transform_manager.store.query_endpoint)
results = list(
endpoint.query(self.created_query %
{'graph': self.graph_name.n3()}))
if results:
created = results[0].date
else:
created = modified
graph += (
(self.graph_name, NS.rdf.type, NS.sd.Graph),
(self.graph_name, NS.dcterms.modified, modified),
(self.graph_name, NS.dcterms.created, created),
)
logger.debug("About to serialize")
output = transform_manager('rdf')
with open(output, 'w') as f:
graph.serialize(f)
logger.debug("Serialization done; about to upload")
uploader = Uploader()
uploader.upload(stores=(transform_manager.store, ),
graph_name=self.graph_name,
filename=output,
method=self.method,
mimetype='application/rdf+xml')
logger.debug("Upload complete")
transform_manager.end([self.graph_name])
transform_manager.touched_graph(self.graph_name)
def upload_dataset_metadata(sender, store, graphs, when, **kwargs):
if store.slug != DEFAULT_STORE_SLUG:
return
if not graphs:
logger.debug("No graphs updated for %r; aborting", store.slug)
return
if not getattr(settings, 'CKAN_API_KEY', None):
logger.debug("No CKAN_API_KEY setting, not doing anything.")
return
client = ckanclient.CkanClient(api_key=settings.CKAN_API_KEY)
endpoint = Endpoint(settings.ENDPOINT_QUERY)
query = _dataset_query % ' \n'.join('(%s)' % rdflib.URIRef(g).n3() for g in graphs)
graph = endpoint.query(query)
datasets = list(graph.subjects(NS.rdf.type, NS.void.Dataset))
if len(datasets) != 1:
logger.debug("Expected one dataset; got %d", len(datasets))
return
dataset = Resource(datasets[0], graph, endpoint)
find = functools.partial(_find, graph, dataset._identifier)
patterns = settings.CKAN_PATTERNS
package_name = find('skos:notation', HUMFREY.theDataHubDatasetName)
if not package_name:
return
#package_name = patterns.get('name', '%s') % slug
package_title = patterns.get('title', '%s') % dataset.label
author = find('dcterms:publisher/foaf:name|rdfs:label|dc:title|skos:prefLabel|dcterms:title')
if author:
author = patterns.get('author', '%s') % author
description = find('rdfs:comment|dcterms:description',
(NS.xtypes['Fragment-Markdown'],
NS.xtypes['Fragment-PlainText'],
None))
maintainer = find('oo:contact/foaf:name|rdfs:label|dc:title|skos:prefLabel|dcterms:title')
if maintainer:
maintainer = patterns.get('maintainer', '%s') % maintainer
maintainer_email = find('oo:contact/foaf:mbox|v:email')
if maintainer_email:
maintainer_email = maintainer_email.replace('mailto:', '')
license = find('dcterms:license|cc:license')
if license:
license = _licenses.get(unicode(license))
sparql_endpoint = find('void:sparqlEndpoint')
if sparql_endpoint:
sparql_endpoint = unicode(sparql_endpoint)
else:
sparql_endpoint = 'http:' + reverse_full('data', 'sparql:endpoint')
tags = find('humfrey:theDataHubDatasetTag', all=True)
groups = find('humfrey:theDataHubDatasetGroup', all=True)
url = doc_forward(dataset.uri)
logger.debug("Fetching existing record for %r", package_name)
try:
package_entity = client.package_entity_get(package_name)
logger.debug("Record successfully retrieved")
except ckanclient.CkanApiNotFoundError:
package_entity = {'name': package_name}
client.package_register_post(package_entity)
logger.debug("No record found; starting from empty")
original = copy.deepcopy(package_entity)
package_entity.update({'name': package_name,
'title': package_title,
'url': url,
'notes': description,
'license_id': license,
'author': author,
'maintainer': maintainer,
'maintainer_email': dataset.oo_contact.get_one_of('foaf:mbox', 'v:email').replace('mailto:', '', 1)})
package_entity['groups'] = list(settings.CKAN_GROUPS
| set(package_entity.get('groups', ()))
| groups)
package_entity['tags'] = list(settings.CKAN_TAGS
| set(package_entity.get('tags', ()))
| tags)
resources = collections.defaultdict(dict, ((r.get('name'), r) for r in package_entity.get('resources', ())))
resources['SPARQL endpoint'].update({'name': 'SPARQL endpoint',
'format': 'api/sparql',
'url': sparql_endpoint})
package_entity['resources'] = resources.values()
logger.debug("Updated CKAN record")
if original != package_entity:
logger.info("Updating %r at thedatahub.org", package_name)
client.package_entity_put(package_entity)
def __init__(self, store, dataset, notation, updated):
self.store = store
self.dataset = dataset
self.notation = notation
self.updated = updated.replace(microsecond=0)
self.endpoint = Endpoint(store.query_endpoint)
