Added initial version of the LoLA service, based on Addis' code

services/LoLA/main.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+from modelverse import *
+from subprocess import Popen, PIPE
+import json
+
+init(address)
+login("test_service", "my_password")
+
+def lola_service(port):
+    json_input = service_get(port)
+    input_data = json.loads(json_input)
+    print input_data['petrinet']
+    print input_data['query']
+    query_formula = "--formula=EF ("+ input_data['query']+")"
+    lola = Popen(["lola", "--path=path_output", query_formula, "--json=output.json"], stdin=PIPE, stdout=PIPE).communicate(input=input_data['petrinet'])
+    
+    output_file = open('output.json', 'r')
+    result = json.load(output_file)
+    output_file.close()
+    # If safety query is violated resulting True in output
+    path = ''
+    if result['analysis']['result']:
+        with open('path_output') as f:
+            for transition in f:
+                transition = transition.replace('\n',',')
+                path = path + transition
+    #json_result = '{"analysis_result": True , "path":\"'+path.rstrip(',') + '\"}'
+    service_set(port, result['analysis']['result'])
+    service_set(port, path.rstrip(','))
+
+service_register("lola", lola_service)
+print("Registered")
+
+while raw_input() != "STOP":
+    # Stay active, as we shouldn't exit while the service is running!
+    pass
+print("Stopping")
+
+service_stop()
+print("Service halted")