Add Configurable metric_name_prefix

infra_libs/ts_mon/common/interface.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Classes representing the monitoring interface for tasks or devices.
 
 Usage:
   import argparse
   from infra_libs import ts_mon
 
@@ skipping 59 matching lines @@
     # The background thread that flushes metrics every
     # --ts-mon-flush-interval-secs seconds.  May be None if
     # --ts-mon-flush != 'auto' or --ts-mon-flush-interval-secs == 0.
     self.flush_thread = None
     # All metrics created by this application.
     self.metrics = {}
     # The MetricStore object that holds the actual metric values.
     self.store = store_ctor(self)
     # Cached time of the last flush. Useful mostly in AppEngine apps.
     self.last_flushed = datetime.datetime.utcfromtimestamp(0)
+    # Metric name prefix
+    self.metric_name_prefix = '/chrome/infra'

[Sergey Berezin, 2016/07/06 17:49:12]

'/chrome/infra/' (trailing slash). This may or may not matter, but for now I'd
play safe :-)

 
   def reset_for_unittest(self):
     self.metrics = {}
     self.last_flushed = datetime.datetime.utcfromtimestamp(0)
     self.store.reset_for_unittest()
 
 state = State()
 
 
 def flush():
@@ skipping 95 matching lines @@
             'Last monitoring flush took %f seconds (longer than '
             '--ts-mon-flush-interval-secs = %f seconds)',
             flush_duration, self.interval_secs)
         next_timeout = 0
 
   def stop(self):
     """Stops the background thread and performs a final flush."""
 
     self.stop_event.set()
     self.join()