Fix issue of lost of broker location due to registration service migration

The logic of pulling ptp status relies on the announcement of location info which
might be lost during registration service migration.
To workaround it, the logic of pulling ptp status will pull location info
if not available

Partial-Bug: 1926532

Signed-off-by: Bin Yang <bin.yang@windriver.com>
Change-Id: I9ddd3e8dcff7660170c029f6d85fab0701a59c9e

notificationclient-base/centos/docker/notificationclient-sidecar/notificationclientsdk/services/daemon.py

@@ -46,6 +46,12 @@ class DaemonControl(object):
         self.refresh()
         pass
 
+    def __del__(self):
+        if self.locationservice_client:
+            self.locationservice_client.cleanup()
+            self.locationservice_client = None
+        return
+
     def refresh(self):
         self.subscription_event.set()
         self.event.set()

notificationclient-base/centos/docker/notificationclient-sidecar/notificationclientsdk/services/ptp.py

@@ -35,27 +35,56 @@ class PtpService(object):
 
     def __del__(self):
         del self.subscription_repo
-        self.locationservice_client.cleanup()
-        del self.locationservice_client
+        self.locationservice_client = None
         return
 
+    def __query_locationinfo(self, broker_name, timeout=5, retry=2):
+        try:
+            location_info = self.locationservice_client.query_location(broker_name, timeout, retry)
+            LOG.debug("Pulled location info@{0}:{1}".format(broker_name, location_info))
+            return location_info
+        except Exception as ex:
+            LOG.warning("Failed to query location of node:{0} due to: {1}".format(
+                broker_name, str(ex)))
+            raise client_exception.NodeNotAvailable(broker_name)
+
+    def __get_node_info(self, default_node_name, timeout=5, retry=2):
+        try:
+            nodeinfo_repo = NodeRepo(autocommit=False)
+            nodeinfo = nodeinfo_repo.get_one(Status=1, NodeName=default_node_name)
+            broker_pod_ip = None
+            supported_resource_types = []
+
+            if nodeinfo:
+                broker_pod_ip = nodeinfo.PodIP
+                supported_resource_types = json.loads(nodeinfo.ResourceTypes or '[]')
+
+            if not broker_pod_ip:
+                # try to query the broker ip
+                location_info = self.__query_locationinfo(default_node_name, timeout, retry)
+                broker_pod_ip = location_info.get("PodIP", None)
+                supported_resource_types = location_info.get("ResourceTypes", [])
+
+            return broker_pod_ip, supported_resource_types
+        finally:
+            del nodeinfo_repo
+
     def query(self, broker_name):
         default_node_name = NodeInfoHelper.default_node_name(broker_name)
-        nodeinfo_repo = NodeRepo(autocommit=False)
-        nodeinfo = nodeinfo_repo.get_one(Status=1, NodeName=default_node_name)
-        # check node availability from DB
-        if not nodeinfo:
+        broker_pod_ip, supported_resource_types = self.__get_node_info(default_node_name)
+
+        if not broker_pod_ip:
+            LOG.warning("Node {0} is not available yet".format(default_node_name))
             raise client_exception.NodeNotAvailable(broker_name)
-        else:
-            broker_pod_ip = nodeinfo.PodIP
-            supported_resource_types = json.loads(nodeinfo.ResourceTypes or '[]')
-            if ResourceType.TypePTP in supported_resource_types:
-                return self._query(default_node_name, broker_pod_ip)
-            else:
-                raise client_exception.ResourceNotAvailable(broker_name, ResourceType.TypePTP)
+
+        if not ResourceType.TypePTP in supported_resource_types:
+            LOG.warning("Resource {0}@{1} is not available yet".format(
+                ResourceType.TypePTP, default_node_name))
+            raise client_exception.ResourceNotAvailable(broker_name, ResourceType.TypePTP)
+
+        return self._query(default_node_name, broker_pod_ip)
 
     def _query(self, broker_name, broker_pod_ip):
-        # broker_host = "notificationservice-{0}".format(broker_name)
         broker_host = "[{0}]".format(broker_pod_ip)
         broker_transport_endpoint = "rabbit://{0}:{1}@{2}:{3}".format(
             self.daemon_control.daemon_context['NOTIFICATION_BROKER_USER'],
@@ -85,17 +114,21 @@ class PtpService(object):
         subscription_orm = SubscriptionOrm(**subscription_dto.to_orm())
         broker_name = subscription_dto.ResourceQualifier.NodeName
         default_node_name = NodeInfoHelper.default_node_name(broker_name)
-        nodeinfos = NodeInfoHelper.enumerate_nodes(broker_name)
-        # check node availability from DB
-        if not nodeinfos or not default_node_name in nodeinfos:
+
+        broker_pod_ip, supported_resource_types = self.__get_node_info(default_node_name)
+
+        if not broker_pod_ip:
             LOG.warning("Node {0} is not available yet".format(default_node_name))
             raise client_exception.NodeNotAvailable(broker_name)
 
+        if not ResourceType.TypePTP in supported_resource_types:
+            LOG.warning("Resource {0}@{1} is not available yet".format(
+                ResourceType.TypePTP, default_node_name))
+            raise client_exception.ResourceNotAvailable(broker_name, ResourceType.TypePTP)
+
         # get initial resource status
         if default_node_name:
-            nodeinfo_repo = NodeRepo(autocommit=False)
-            nodeinfo = nodeinfo_repo.get_one(Status=1, NodeName=default_node_name)
-            broker_pod_ip = nodeinfo.PodIP
+
             ptpstatus = None
             ptpstatus = self._query(default_node_name, broker_pod_ip)
             LOG.info("initial ptpstatus:{0}".format(ptpstatus))