Feature/pkgsplit (#83)

* Starting to spawn base package
* More package hacking
* Bedrock and VertexAI
* Parquet split
* Updated templates
* Utils

trustgraph-flow/trustgraph/query/triples/cassandra/service.py

@@ -0,0 +1,173 @@
+
+"""
+Triples query service.  Input is a (s, p, o) triple, some values may be
+null.  Output is a list of triples.
+"""
+
+from .... direct.cassandra import TrustGraph
+from .... schema import TriplesQueryRequest, TriplesQueryResponse, Error
+from .... schema import Value, Triple
+from .... schema import triples_request_queue
+from .... schema import triples_response_queue
+from .... base import ConsumerProducer
+
+module = ".".join(__name__.split(".")[1:-1])
+
+default_input_queue = triples_request_queue
+default_output_queue = triples_response_queue
+default_subscriber = module
+default_graph_host='localhost'
+
+class Processor(ConsumerProducer):
+
+    def __init__(self, **params):
+
+        input_queue = params.get("input_queue", default_input_queue)
+        output_queue = params.get("output_queue", default_output_queue)
+        subscriber = params.get("subscriber", default_subscriber)
+        graph_host = params.get("graph_host", default_graph_host)
+
+        super(Processor, self).__init__(
+            **params | {
+                "input_queue": input_queue,
+                "output_queue": output_queue,
+                "subscriber": subscriber,
+                "input_schema": TriplesQueryRequest,
+                "output_schema": TriplesQueryResponse,
+                "graph_host": graph_host,
+            }
+        )
+
+        self.tg = TrustGraph([graph_host])
+
+    def create_value(self, ent):
+        if ent.startswith("http://") or ent.startswith("https://"):
+            return Value(value=ent, is_uri=True)
+        else:
+            return Value(value=ent, is_uri=False)
+
+    def handle(self, msg):
+
+        try:
+
+            v = msg.value()
+
+            # Sender-produced ID
+            id = msg.properties()["id"]
+
+            print(f"Handling input {id}...", flush=True)
+
+            triples = []
+
+            if v.s is not None:
+                if v.p is not None:
+                    if v.o is not None:
+                        resp = self.tg.get_spo(
+                            v.s.value, v.p.value, v.o.value,
+                            limit=v.limit
+                        )
+                        triples.append((v.s.value, v.p.value, v.o.value))
+                    else:
+                        resp = self.tg.get_sp(
+                            v.s.value, v.p.value,
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((v.s.value, v.p.value, t.o))
+                else:
+                    if v.o is not None:
+                        resp = self.tg.get_os(
+                            v.o.value, v.s.value, 
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((v.s.value, t.p, v.o.value))
+                    else:
+                        resp = self.tg.get_s(
+                            v.s.value,
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((v.s.value, t.p, t.o))
+            else:
+                if v.p is not None:
+                    if v.o is not None:
+                        resp = self.tg.get_po(
+                            v.p.value, v.o.value,
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((t.s, v.p.value, v.o.value))
+                    else:
+                        resp = self.tg.get_p(
+                            v.p.value,
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((t.s, v.p.value, t.o))
+                else:
+                    if v.o is not None:
+                        resp = self.tg.get_o(
+                            v.o.value,
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((t.s, t.p, v.o.value))
+                    else:
+                        resp = self.tg.get_all(
+                            limit=v.limit
+                        )
+                        for t in resp:
+                            triples.append((t.s, t.p, t.o))
+
+            triples = [
+                Triple(
+                    s=self.create_value(t[0]),
+                    p=self.create_value(t[1]), 
+                    o=self.create_value(t[2])
+                )
+                for t in triples
+            ]
+
+            print("Send response...", flush=True)
+            r = TriplesQueryResponse(triples=triples, error=None)
+            self.producer.send(r, properties={"id": id})
+
+            print("Done.", flush=True)
+
+        except Exception as e:
+
+            print(f"Exception: {e}")
+
+            print("Send error response...", flush=True)
+
+            r = TriplesQueryResponse(
+                error=Error(
+                    type = "llm-error",
+                    message = str(e),
+                ),
+                response=None,
+            )
+
+            self.producer.send(r, properties={"id": id})
+
+            self.consumer.acknowledge(msg)
+
+    @staticmethod
+    def add_args(parser):
+
+        ConsumerProducer.add_args(
+            parser, default_input_queue, default_subscriber,
+            default_output_queue,
+        )
+
+        parser.add_argument(
+            '-g', '--graph-host',
+            default="localhost",
+            help=f'Graph host (default: localhost)'
+        )
+
+def run():
+
+    Processor.start(module, __doc__)
+