Allow to configure the seed in the GUI

dream/simulation/GUI/Default.py

@@ -142,6 +142,15 @@ schema = {
     "_class": "Dream.Property",
     "_default": 10
   },
+  "seed": {
+    "id": "seed",
+    "name": "Seed for random number generator",
+    "description": "When using the same seed, the random number generator"
+                   " produce the same sequence of numbers",
+    "type": "string",
+    "_class": "Dream.Property",
+    "_default": "",
+  },
   "batchNumberOfUnits": {
     "id": "batchNumberOfUnits",
     "type": "number",
@@ -309,6 +318,7 @@ class Simulation(object):
            schema["processTimeout"],
            schema["currentDate"],
            schema["trace"],
+           schema["seed"],
         ],
         "gui": {
           'debug_json': 1,

dream/simulation/LineGenerationJSON.py

@@ -121,6 +121,7 @@ def readGeneralInput():
     G.maxSimTime=float(general.get('maxSimTime', '100'))                    # get the maxSimTime / default 100
     G.trace=general.get('trace', 'No')                                      # get trace in order to check if trace is requested
     G.confidenceLevel=float(general.get('confidenceLevel', '0.95'))         # get the confidence level
+    G.seed = general.get('seed')
 
 # ===========================================================================
 #                       creates the simulation objects
@@ -1268,7 +1269,10 @@ def main(argv=[], input_data=None):
     #run the experiment (replications)          
     for i in xrange(G.numberOfReplications):
         #logger.info("start run number "+str(i+1)) 
-        G.Rnd=Random(G.seed + i)
+        if G.seed:
+          G.Rnd=Random('%s%s' % (G.seed, i))
+        else:
+          G.Rnd=Random()
         initialize()                        #initialize the simulation 
         createWIP()
         initializeObjects()