Publish indications on kafka

Change-Id: I4214e1de042109ff3ecf6871fe2d2d14a3476633
diff --git a/voltha/adapters/openolt/openolt_indications.py b/voltha/adapters/openolt/openolt_indications.py
new file mode 100644
index 0000000..8a51304
--- /dev/null
+++ b/voltha/adapters/openolt/openolt_indications.py
@@ -0,0 +1,78 @@
+#
+# Copyright 2019 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import threading
+from google.protobuf.json_format import Parse
+from simplejson import loads
+from twisted.internet import reactor
+import structlog
+
+from voltha.adapters.openolt.protos import openolt_pb2
+from voltha.adapters.openolt.openolt_kafka_consumer import KConsumer
+
+
+class OpenoltIndications(object):
+    def __init__(self, device):
+        self.log = structlog.get_logger()
+        self.device = device
+        self.indications_thread_handle = threading.Thread(
+            target=self.indications_thread)
+        self.indications_thread_handle.setDaemon(True)
+
+    def start(self):
+        self.indications_thread_handle.start()
+
+    def stop(self):
+        pass
+
+    def indications_thread(self):
+        self.log.debug('openolt indications thread starting')
+        KConsumer(self.indications_process,
+                  "openolt.ind.olt",
+                  "openolt.ind.intf",
+                  'openolt.ind.intfoper',
+                  'openolt.ind.onudisc',
+                  'openolt.ind.onu',
+                  "openolt.ind.pkt")
+
+    def indications_process(self, topic, msg):
+        self.log.debug("received openolt indication", topic=topic, msg=msg)
+
+        if topic == "openolt.ind.olt":
+            pb = Parse(loads(msg), openolt_pb2.OltIndication(),
+                       ignore_unknown_fields=True)
+            reactor.callFromThread(self.device.olt_indication, pb)
+        if topic == "openolt.ind.intf":
+            pb = Parse(loads(msg), openolt_pb2.IntfIndication(),
+                       ignore_unknown_fields=True)
+            reactor.callFromThread(self.device.intf_indication, pb)
+        if topic == "openolt.ind.intfoper":
+            pb = Parse(loads(msg), openolt_pb2.IntfOperIndication(),
+                       ignore_unknown_fields=True)
+            reactor.callFromThread(self.device.intf_oper_indication, pb)
+        if topic == "openolt.ind.onudisc":
+            pb = Parse(loads(msg), openolt_pb2.OnuDiscIndication(),
+                       ignore_unknown_fields=True)
+            reactor.callFromThread(
+                self.device.onu_discovery_indication, pb)
+        if topic == "openolt.ind.onu":
+            pb = Parse(loads(msg), openolt_pb2.OnuIndication(),
+                       ignore_unknown_fields=True)
+            reactor.callFromThread(self.device.onu_indication, pb)
+        elif topic == "openolt.ind.pkt":
+            pb = Parse(loads(msg), openolt_pb2.PacketIndication(),
+                       ignore_unknown_fields=True)
+            reactor.callFromThread(self.device.packet_indication, pb)