allow to select database (central or local) when starting

feeder.py

@@ -7,10 +7,22 @@ from seinflux import SEHistory
 from servicemanager import FrappyManager
 
 
-def main():
+USAGE = """
+Usage:
+    start server
+
+        python feeder.py [<db instance>]
+
+    add a SECoP connection:
+
+        python feeder.py + uri [device] [instrument]
+"""
+
+
+def main(dbname=None):
     # egen = EventStream(ScanReply(), ScanStream(), n=NicosStream('localhost:14002'))
     egen = EventStream(ScanReply(), ScanStream())
-    db = SEHistory(access='write')
+    db = SEHistory(dbname, access='write')
     db.enable_write_access()
 
     fm = FrappyManager()
@@ -23,8 +35,9 @@ def main():
                 port = fm.info.get(ins, {}).get(service, {})
                 if port:
                     uri = f'{host}:{port}'
-                    print('CREATE', uri, cfginfo.get((ins, service)))
+                    print('CREATE', uri, ins, cfginfo.get((ins, service)))
                     TrySecopConnect(uri)
+                    db.set_instrument(uri, ins)
 
     event_map = {'value': db.add_float, 'error': db.add_error, 'stream': db.add_stream}
 
@@ -39,7 +52,12 @@ def main():
         db.disconnect()
 
 
-if len(sys.argv) > 1:
-    send_fake_udp(*sys.argv[1:])
+if len(sys.argv) == 2:
+    main(sys.argv[1])
+elif len(sys.argv) > 2:
+    if sys.argv[1] == '+':
+        send_fake_udp(*sys.argv[2:])
+    else:
+        print(USAGE)
 else:
     main()