Feature/config service (#332)

Configuration service provides an API to change configuration. Complete configuration is pushed down a config queue so that users have a complete copy of config object.

trustgraph-flow/trustgraph/gateway/config.py

@@ -0,0 +1,77 @@
+
+from .. schema import ConfigRequest, ConfigResponse, ConfigKey, ConfigValue
+from .. schema import config_request_queue
+from .. schema import config_response_queue
+
+from . endpoint import ServiceEndpoint
+from . requestor import ServiceRequestor
+
+class ConfigRequestor(ServiceRequestor):
+    def __init__(self, pulsar_client, timeout, auth):
+
+        super(ConfigRequestor, self).__init__(
+            pulsar_client=pulsar_client,
+            request_queue=config_request_queue,
+            response_queue=config_response_queue,
+            request_schema=ConfigRequest,
+            response_schema=ConfigResponse,
+            timeout=timeout,
+        )
+
+    def to_request(self, body):
+
+        if "keys" in body:
+            keys = [
+                ConfigKey(
+                    type = k["type"],
+                    key = k["key"],
+                )
+                for k in body["keys"]
+            ]
+        else:
+            keys = None
+
+        if "values" in body:
+            values = [
+                ConfigValue(
+                    type = v["type"],
+                    key = v["key"],
+                    value = v["value"],
+                )
+                for v in body["values"]
+            ]
+        else:
+            values = None
+
+        return ConfigRequest(
+            operation = body.get("operation", None),
+            keys = keys,
+            type = body.get("type", None),
+            values = values
+        )
+
+    def from_response(self, message):
+
+        response = { }
+
+        if message.version:
+            response["version"] = message.version
+
+        if message.values:
+            response["values"] = [
+                {
+                    "type": v.type,
+                    "key": v.key,
+                    "value": v.value,
+                }
+                for v in message.values
+            ]
+
+        if message.directory:
+            response["directory"] = message.directory
+
+        if message.config:
+            response["config"] = message.config
+
+        return response, True
+

trustgraph-flow/trustgraph/gateway/service.py

@@ -38,6 +38,7 @@ from . agent import AgentRequestor
 from . dbpedia import DbpediaRequestor
 from . internet_search import InternetSearchRequestor
 from . librarian import LibrarianRequestor
+from . config import ConfigRequestor
 from . triples_stream import TriplesStreamEndpoint
 from . graph_embeddings_stream import GraphEmbeddingsStreamEndpoint
 from . document_embeddings_stream import DocumentEmbeddingsStreamEndpoint
@@ -141,6 +142,10 @@ class Api:
                 pulsar_client=self.pulsar_client, timeout=self.timeout,
                 auth = self.auth,
             ),
+            "config": ConfigRequestor(
+                pulsar_client=self.pulsar_client, timeout=self.timeout,
+                auth = self.auth,
+            ),
             "encyclopedia": EncyclopediaRequestor(
                 pulsar_client=self.pulsar_client, timeout=self.timeout,
                 auth = self.auth,
@@ -199,6 +204,10 @@ class Api:
                 endpoint_path = "/api/v1/librarian", auth=self.auth,
                 requestor = self.services["librarian"],
             ),
+            ServiceEndpoint(
+                endpoint_path = "/api/v1/config", auth=self.auth,
+                requestor = self.services["config"],
+            ),
             ServiceEndpoint(
                 endpoint_path = "/api/v1/encyclopedia", auth=self.auth,
                 requestor = self.services["encyclopedia"],