added python-dcae-policy to utils

Change-Id: Iefba53b3fa219ff799828e5128abd7503d0fe75c
Issue-Id: DCAEGEN2-80
Signed-off-by: Alex Shatov <alexs@att.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/python-dcae-policy/dcaepolicy/dcae_consul_client.py b/python-dcae-policy/dcaepolicy/dcae_consul_client.py
new file mode 100644
index 0000000..9856eeb
--- /dev/null
+++ b/python-dcae-policy/dcaepolicy/dcae_consul_client.py
@@ -0,0 +1,45 @@
+"""client to talk to consul on standard port 8500"""
+
+# org.onap.dcae
+# ================================================================================
+# Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
+# ================================================================================
+# 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.
+# ============LICENSE_END=========================================================
+#
+# ECOMP is a trademark and service mark of AT&T Intellectual Property.
+
+import requests
+
+CONSUL_HOST = "localhost"
+CONSUL_PORT = 8500
+
+class ConsulClient(object):
+    """talking to the local Consul agent for interfacing with Consul from the plugin.
+    Safe to assume that the Consul agent is always at localhost.
+    """
+    CONSUL_SERVICE_MASK = "{0}/v1/catalog/service/{1}"
+    SERVICE_MASK = "http://{0}:{1}"
+    _consul_url = "http://{0}:{1}".format(CONSUL_HOST, CONSUL_PORT)
+
+    @staticmethod
+    def get_service_url(service_name):
+        """find the service record in consul"""
+        response = requests.get(ConsulClient.CONSUL_SERVICE_MASK.format( \
+            ConsulClient._consul_url, service_name))
+        response.raise_for_status()
+        resp_json = response.json()
+        if resp_json:
+            service = resp_json[0]
+            return ConsulClient.SERVICE_MASK.format( \
+                    service["ServiceAddress"], service["ServicePort"])