Handle more error scenarios for promql_api

Handle more error scenarios for promql
and improve README.Added copy rights

Change-Id: Idb3ac7e2aea6fe3e6df069f63e63b2a5208f96d1
Issue-ID: ONAPARC-452
Signed-off-by: Rajamohan Raj <rajamohan.raj@intel.com>

1 files changed, 26 insertions, 7 deletions

diff --git a/vnfs/DAaaS/sample-apps/m3db_promql/sample_promql_query.py b/vnfs/DAaaS/sample-apps/m3db_promql/sample_promql_query.py
index 270c5087..fbbf497e 100644
--- a/vnfs/DAaaS/sample-apps/m3db_promql/sample_promql_query.py
+++ b/vnfs/DAaaS/sample-apps/m3db_promql/sample_promql_query.py
@@ -1,16 +1,35 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2019 Intel Corporation Intellectual Property
+#
+#   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.
+#
+# -------------------------------------------------------------------------
+
+
 from promql_api.prom_ql_api import query
 import pprint
 
-LABELS = ['irate(collectd_cpufreq{exported_instance="otconap7",cpufreq="1"}[2m])']
+QUERY_STRING = ['irate(collectd_cpufreq{exported_instance="otconap7",cpufreq="1"}[2m])']
 
 #Other examples
-#LABELS = [ 'irate(http_requests_total{code="200"}[1m])', 'collectd_cpu_percent{job="collectd", exported_instance="an11-31"}[1m]' ]
-#LABELS = ['irate(collectd_cpufreq{exported_instance="otconap7",cpufreq="1"}[2m])', 'go_info']
+#QUERY_STRING = [ 'irate(http_requests_total{code="200"}[1m])', 'collectd_cpu_percent{job="collectd", exported_instance="otconap7"}[1m]' ]
+#QUERY_STRING = ['irate(collectd_cpufreq{exported_instance="otconap7",cpufreq="1"}[2m])', 'go_info']
 
 def main():
-    list_of_result_sets = query(LABELS)
-    for each_result in list_of_result_sets:
-        pprint.pprint(each_result)
+    list_of_result_sets = query(QUERY_STRING)
+    if list_of_result_sets:
+        for each_result in list_of_result_sets:
+                pprint.pprint(each_result)
 
 if __name__ == "__main__":
-     main()
\ No newline at end of file
+     main()