uis subscription data sync info (UIS-597)

cylc/flow/data_store_mgr.py

@@ -62,8 +62,9 @@
 from typing import (
     Any,
     Dict,
-    Optional,
+    Iterable,
     List,
+    Optional,
     Set,
     TYPE_CHECKING,
     Tuple,
@@ -2705,6 +2706,23 @@
 
         return workflow_msg
 
+    def get_workflow_only(self):
+        """Gather workflow summary data into a Protobuf message.
+
+        No tasks / cycles, etc, just workflow stuff.
+
+        Returns:
+            cylc.flow.data_messages_pb2.PbEntireWorkflow
+
+        """
+
+        workflow_msg = PbEntireWorkflow()
+        workflow_msg.workflow.CopyFrom(
+            self.data[self.workflow_id][WORKFLOW]
+        )
+
+        return workflow_msg
+
     def get_publish_deltas(self):
         """Return deltas for publishing."""
         all_deltas = DELTAS_MAP[ALL_DELTAS]()
@@ -2752,3 +2770,25 @@
                 f'$edge|{left_tokens.relative_id}|{right_tokens.relative_id}'
             )
         ).id
+
+    # subscription stubs
+    def graphql_sub_interrogate(self, sub_id, info):
+        """Scope data requirements."""
+        pass
+
+    async def graphql_sub_data_match(self, w_id, sub_id):
+        """Match store data level to requested graphql subscription."""
+        pass
+
+    async def graphql_sub_discard(self, sub_id):
+        """Discard graphql subscription references."""
+        pass
+
+    async def set_query_sync_levels(
+        self,
+        w_ids: Iterable[str],
+        level: Optional[str] = None,
+        expire_delay: Optional[float] = None,
+    ):
+        """Set a workflow sync level."""
+        pass

cylc/flow/network/resolvers.py

@@ -346,22 +346,36 @@
     async def get_workflow_by_id(self, args):
         """Return a workflow store by ID."""
         try:
-            if 'sub_id' in args and args['delta_store']:
-                return self.delta_store[args['sub_id']][args['id']][
-                    args['delta_type']][WORKFLOW]
+            if 'sub_id' in args:
+                if args['delta_store']:
+                    return self.delta_store[args['sub_id']][args['id']][
+                        args['delta_type']][WORKFLOW]
+            else:
+                await self.data_store_mgr.set_query_sync_levels(
+                    [self.data_store_mgr.data[args['id']][WORKFLOW].id]
+                )
             return self.data_store_mgr.data[args['id']][WORKFLOW]
         except KeyError:
             return None
 
     async def get_workflows_data(self, args: Dict[str, Any]):
         """Return list of data from workflows."""
         # Both cases just as common so 'if' not 'try'
-        if 'sub_id' in args and args['delta_store']:
-            return [
-                delta[args['delta_type']]
-                for key, delta in self.delta_store[args['sub_id']].items()
-                if workflow_filter(self.data_store_mgr.data[key], args)
-            ]
+        if 'sub_id' in args:
+            if args['delta_store']:
+                return [
+                    delta[args['delta_type']]
+                    for key, delta in self.delta_store[args['sub_id']].items()
+                    if workflow_filter(self.data_store_mgr.data[key], args)
+                ]
+        else:
+            await self.data_store_mgr.set_query_sync_levels(
+                [
+                    workflow[WORKFLOW].id
+                    for workflow in self.data_store_mgr.data.values()
+                    if workflow_filter(workflow, args)
+                ]
+            )
         return [
             workflow
             for workflow in self.data_store_mgr.data.values()
@@ -375,6 +389,22 @@
              for flow in await self.get_workflows_data(args)],
             args)
 
+    async def get_flow_data_from_ids(self, data_store, native_ids):
+        """Return workflow data by id."""
+        w_ids = []
+        for native_id in native_ids:
+            w_ids.append(
+                Tokens(native_id).workflow_id
+            )
+        await self.data_store_mgr.set_query_sync_levels(
+            set(w_ids)
+        )
+        return [
+            data_store[w_id]
+            for w_id in iter_uniq(w_ids)
+            if w_id in data_store
+        ]
+
     # nodes
     def get_node_state(self, node, node_type):
         """Return state, from node or data-store."""
@@ -414,14 +444,18 @@
         """Return protobuf node objects for given id."""
         nat_ids = uniq(args.get('native_ids', []))
         # Both cases just as common so 'if' not 'try'
-        if 'sub_id' in args and args['delta_store']:
-            flow_data = [
-                delta[args['delta_type']]
-                for delta in get_flow_data_from_ids(
-                    self.delta_store[args['sub_id']], nat_ids)
-            ]
+        if 'sub_id' in args:
+            if args['delta_store']:
+                flow_data = [
+                    delta[args['delta_type']]
+                    for delta in get_flow_data_from_ids(
+                        self.delta_store[args['sub_id']], nat_ids)
+                ]
+            else:
+                flow_data = get_flow_data_from_ids(
+                    self.data_store_mgr.data, nat_ids)
         else:
-            flow_data = get_flow_data_from_ids(
+            flow_data = await self.get_flow_data_from_ids(
                 self.data_store_mgr.data, nat_ids)
 
         if node_type == PROXY_NODES:
@@ -450,10 +484,14 @@
         w_id = Tokens(n_id).workflow_id
         # Both cases just as common so 'if' not 'try'
         try:
-            if 'sub_id' in args and args.get('delta_store'):
-                flow = self.delta_store[
-                    args['sub_id']][w_id][args['delta_type']]
+            if 'sub_id' in args:
+                if args.get('delta_store'):
+                    flow = self.delta_store[
+                        args['sub_id']][w_id][args['delta_type']]
+                else:
+                    flow = self.data_store_mgr.data[w_id]
             else:
+                await self.data_store_mgr.set_query_sync_levels([w_id])
                 flow = self.data_store_mgr.data[w_id]
         except KeyError:
             return None
@@ -475,14 +513,18 @@
     async def get_edges_by_ids(self, args):
         """Return protobuf edge objects for given id."""
         nat_ids = uniq(args.get('native_ids', []))
-        if 'sub_id' in args and args['delta_store']:
-            flow_data = [
-                delta[args['delta_type']]
-                for delta in get_flow_data_from_ids(
-                    self.delta_store[args['sub_id']], nat_ids)
-            ]
+        if 'sub_id' in args:
+            if args['delta_store']:
+                flow_data = [
+                    delta[args['delta_type']]
+                    for delta in get_flow_data_from_ids(
+                        self.delta_store[args['sub_id']], nat_ids)
+                ]
+            else:
+                flow_data = get_flow_data_from_ids(
+                    self.data_store_mgr.data, nat_ids)
         else:
-            flow_data = get_flow_data_from_ids(
+            flow_data = await self.get_flow_data_from_ids(
                 self.data_store_mgr.data, nat_ids)
 
         return sort_elements(
@@ -502,6 +544,7 @@
         edge_ids = set()
         # Setup for edgewise search.
         new_nodes = root_nodes
+        is_sub = 'sub_id' in args
         for _ in range(args['distance']):
             # Gather edges.
             # Edges should be unique (graph not circular),
@@ -512,10 +555,19 @@
                 for e_id in n.edges
             }.difference(edge_ids)
             edge_ids.update(new_edge_ids)
+            if is_sub:
+                flow_data = get_flow_data_from_ids(
+                    self.data_store_mgr.data,
+                    new_edge_ids
+                )
+            else:
+                flow_data = await self.get_flow_data_from_ids(
+                    self.data_store_mgr.data,
+                    new_edge_ids
+                )
             new_edges = [
                 edge
-                for flow in get_flow_data_from_ids(
-                    self.data_store_mgr.data, new_edge_ids)
+                for flow in flow_data
                 for edge in get_data_elements(flow, new_edge_ids, EDGES)
             ]
             edges += new_edges
@@ -530,10 +582,19 @@
             if not new_node_ids:
                 break
             node_ids.update(new_node_ids)
+            if is_sub:
+                flow_data = get_flow_data_from_ids(
+                    self.data_store_mgr.data,
+                    new_node_ids
+                )
+            else:
+                flow_data = await self.get_flow_data_from_ids(
+                    self.data_store_mgr.data,
+                    new_node_ids
+                )
             new_nodes = [
                 node
-                for flow in get_flow_data_from_ids(
-                    self.data_store_mgr.data, new_node_ids)
+                for flow in flow_data
                 for node in get_data_elements(flow, new_node_ids, TASK_PROXIES)
             ]
             nodes += new_nodes
@@ -569,6 +630,8 @@
         delta_queues = self.data_store_mgr.delta_queues
         deltas_queue: DeltaQueue = queue.Queue()
 
+        self.data_store_mgr.graphql_sub_interrogate(sub_id, info)
+
         counters: Dict[str, int] = {}
         delta_yield_queue: DeltaQueue = queue.Queue()
         flow_delta_queues: Dict[str, queue.Queue[Tuple[str, dict]]] = {}
@@ -591,6 +654,9 @@
                     if w_id in self.data_store_mgr.data:
                         if sub_id not in delta_queues[w_id]:
                             delta_queues[w_id][sub_id] = deltas_queue
+                            await self.data_store_mgr.graphql_sub_data_match(
+                                w_id, sub_id
+                            )
                             # On new yield workflow data-store as added delta
                             if args.get('initial_burst'):
                                 delta_store = create_delta_store(
@@ -658,6 +724,7 @@
             import traceback
             logger.warning(traceback.format_exc())
         finally:
+            await self.data_store_mgr.graphql_sub_discard(sub_id)
             for w_id in w_ids:
                 if delta_queues.get(w_id, {}).get(sub_id):
                     del delta_queues[w_id][sub_id]
@@ -702,8 +769,11 @@
         meta: Dict[str, Any]
     ) -> List[Dict[str, Any]]:
         """Mutate workflow."""
-        w_ids = [flow[WORKFLOW].id
-                 for flow in await self.get_workflows_data(w_args)]
+        w_ids = [
+            workflow[WORKFLOW].id
+            for workflow in self.data_store_mgr.data.values()
+            if workflow_filter(workflow, w_args)
+        ]
         if not w_ids:
             workflows = list(self.data_store_mgr.data.keys())
             return [{

cylc/flow/network/server.py

@@ -46,6 +46,7 @@
 # maps server methods to the protobuf message (for client/UIS import)
 PB_METHOD_MAP: Dict[str, Any] = {
     'pb_entire_workflow': PbEntireWorkflow,
+    'pb_workflow_only': PbEntireWorkflow,
     'pb_data_elements': DELTAS_MAP
 }
 
@@ -416,6 +417,16 @@ def pb_entire_workflow(self, **_kwargs) -> bytes:
         pb_msg = self.schd.data_store_mgr.get_entire_workflow()
         return pb_msg.SerializeToString()
 
+    @authorise()
+    @expose
+    def pb_workflow_only(self, **_kwargs) -> bytes:
+        """Send only the workflow data, not tasks etc.
+
+        Returns serialised Protobuf message
+        """
+        pb_msg = self.schd.data_store_mgr.get_workflow_only()
+        return pb_msg.SerializeToString()
+
     @authorise()
     @expose
     def pb_data_elements(self, element_type: str, **_kwargs) -> bytes:

cylc/flow/network/subscriber.py

@@ -93,6 +93,16 @@ def _socket_options(self) -> None:
         for topic in self.topics:
             self.socket.setsockopt(zmq.SUBSCRIBE, topic)
 
+    def unsubscribe_topic(self, topic):
+        if topic in self.topics:
+            self.socket.setsockopt(zmq.UNSUBSCRIBE, topic)
+            self.topics.discard(topic)
+
+    def subscribe_topic(self, topic):
+        if topic not in self.topics:
+            self.socket.setsockopt(zmq.SUBSCRIBE, topic)
+            self.topics.add(topic)
+
     async def subscribe(self, msg_handler, *args, **kwargs):
         """Subscribe to updates from the provided socket."""
         while True:

tests/integration/test_publisher.py

@@ -32,9 +32,13 @@ async def test_publisher(flow, scheduler, run, one_conf, port_range):
             schd.workflow,
             host=schd.host,
             port=schd.server.pub_port,
-            topics=[b'workflow']
+            topics=[b'shutdown']
         )
 
+        subscriber.unsubscribe_topic(b'shutdown')
+        subscriber.subscribe_topic(b'workflow')
+        assert subscriber.topics == {b'workflow'}
+
         async with timeout(2):
             # wait for the first delta from the workflow
             btopic, msg = await subscriber.socket.recv_multipart()

tests/integration/test_server.py

@@ -79,6 +79,17 @@ def test_pb_entire_workflow(myflow):
     assert data.workflow.id == myflow.id
 
 
+def test_pb_workflow_only(myflow):
+    """Test Protobuf workflow only endpoint method."""
+    data = PB_METHOD_MAP['pb_workflow_only']()
+    data.ParseFromString(
+        call_server_method(
+            myflow.server.pb_workflow_only
+        )
+    )
+    assert data.workflow.id == myflow.id
+
+
 async def test_stop(one: Scheduler, start):
     """Test stop."""
     async with start(one):