knowledge service (#367)

* Write knowledge core elements to Cassandra

* Store service works, building management service

* kg-manager

trustgraph-base/trustgraph/schema/__init__.py

@@ -13,4 +13,5 @@ from . lookup import *
 from . library import *
 from . config import *
 from . flows import *
+from . knowledge import *
 

trustgraph-base/trustgraph/schema/knowledge.py

@@ -0,0 +1,49 @@
+
+from pulsar.schema import Record, Bytes, String, Array, Long, Boolean
+from . types import Triple
+from . topic import topic
+from . types import Error
+from . metadata import Metadata
+from . documents import Document, TextDocument
+from . graph import Triples, GraphEmbeddings
+
+# fetch-kg-core
+#   -> (???)
+#   <- ()
+#   <- (error)
+
+# delete-kg-core
+#   -> (???)
+#   <- ()
+#   <- (error)
+
+# list-kg-cores
+#   -> (user)
+#   <- ()
+#   <- (error)
+
+class KnowledgeRequest(Record):
+
+    # fetch-kg-core, delete-kg-core, list-kg-cores
+    operation = String()
+
+    # list-kg-cores, delete-kg-core
+    user = String()
+
+    # fetch-kg-core, list-kg-cores, delete-kg-core
+    id = String()
+
+class KnowledgeResponse(Record):
+    error = Error()
+    ids = Array(String())
+    eos = Boolean()     # Indicates end of knowledge core stream
+    triples = Triples()
+    graph_embeddings = GraphEmbeddings()
+
+knowledge_request_queue = topic(
+    'knowledge', kind='non-persistent', namespace='request'
+)
+knowledge_response_queue = topic(
+    'knowledge', kind='non-persistent', namespace='response',
+)
+

trustgraph-base/trustgraph/schema/library.py

@@ -51,17 +51,6 @@ from . documents import Document, TextDocument
 #   <- (processing_metadata[])
 #   <- (error)
 
-# OLD:
-# add(Metadata, Bytes) : error?
-# copy(id, user, collection)
-# move(id, user, collection)
-# delete(id)
-# get(id) : Bytes
-# reindex(id)
-# list(user, collection) : id[]
-# info(id[]) : DocumentInfo[]
-# search(<key,op,value>[]) : id[]
-
 class DocumentMetadata(Record):
     id = String()
     time = Long()