+from LATClient import LATClient
+from select import select
+from threading import Timer
+
+def check_LAT_service(servicename, retries=3):
+ latclient = LATClient(service=servicename.upper())
+ rfh, wfh = latclient.get_fh()
+ results = {'error': retries, 'closed': retries, 'open': retries}
+ test_string = "got wombles?"
+
+ # Only return after n(retries) consistent results, although not necessarily
+ # in order. This means we poll at least (retries) and up to (retries ** 2) times.
+ # This is mtearle's original code. No idea if it's the Right Thing.
+ while True:
+ try:
+ wfh.write(test_string)
+ wfh.flush()
+ except:
+ results['error'] -= 1
+ if results['error'] == 0: return -1
+ continue
+ rr, wr, er = select([rfh], [], [], 3.0)
+ if rfh not in rr:
+ results['open'] -= 1
+ if results['open'] == 0: return 1
+ continue
+ recv = rfh.read(len(test_string))
+ if recv <> test_string:
+ results['error'] -= 1
+ if results['error'] == 0: return -1
+ continue
+ results['closed'] -= 1
+ if results['closed'] == 0: return 0