1 files changed, 51 insertions, 0 deletions
diff --git a/osdf/adapters/dcae/des.py b/osdf/adapters/dcae/des.py
new file mode 100644
index 0000000..57d0371
--- /dev/null
+++ b/osdf/adapters/dcae/des.py
@@ -0,0 +1,51 @@
+# -------------------------------------------------------------------------
+#   Copyright (C) 2020 Wipro Limited.
+#
+#   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 requests
+from requests.auth import HTTPBasicAuth
+
+from osdf.config.base import osdf_config
+
+
+class DESException(Exception):
+    pass
+
+
+def extract_data(service_id, request_data):
+    """Extracts data from the data lake via DES.
+
+    param: service_id: kpi data identifier
+    param: request_data: data to send
+    param: osdf_config: osdf config to retrieve api info
+    """
+
+    config = osdf_config.deployment
+    user, password = config['desUsername'], config['desPassword']
+    auth = HTTPBasicAuth(user, password)
+    headers = config["desHeaders"]
+    req_url = config["desUrl"] + config["desApiPath"] + service_id
+
+    try:
+        response = requests.post(req_url, data=request_data, headers=headers, auth=auth, verify=False)
+    except requests.RequestException as e:
+        raise DESException("Request exception was encountered {}".format(e))
+
+    if response.status_code == 200:
+        return response.json().get("result")
+    else:
+        raise DESException("Response code other than 200. Response code: {}".format(response.status_code))