Change graph writers to ingest Triples instead of Triple. This is just

an interface change, triples are still passed one-at-a-time from extractors,
but this permits sending in batches in the future.

trustgraph-base/trustgraph/schema/graph.py

@@ -1,7 +1,7 @@
 
 from pulsar.schema import Record, Bytes, String, Boolean, Integer, Array, Double
 
-from . types import Error, Value
+from . types import Error, Value, Triple
 from . topic import topic
 from . metadata import Metadata
 
@@ -41,11 +41,9 @@ graph_embeddings_response_queue = topic(
 
 # Graph triples
 
-class Triple(Record):
+class Triples(Record):
     metadata = Metadata()
-    s = Value()
-    p = Value()
-    o = Value()
+    triples = Array(Triple())
 
 triples_store_queue = topic('triples-store')
 

trustgraph-base/trustgraph/schema/types.py

@@ -10,6 +10,11 @@ class Value(Record):
     is_uri = Boolean()
     type = String()
 
+class Triple(Record):
+    s = Value()
+    p = Value()
+    o = Value()
+
 class Field(Record):
     name = String()
     # int, string, long, bool, float, double