Source Code for Module gofer.metrics

 1  # 
 2  # Copyright (c) 2011 Red Hat, Inc. 
 3  # 
 4  # This software is licensed to you under the GNU Lesser General Public 
 5  # License as published by the Free Software Foundation; either version 
 6  # 2 of the License (LGPLv2) or (at your option) any later version. 
 7  # There is NO WARRANTY for this software, express or implied, 
 8  # including the implied warranties of MERCHANTABILITY, 
 9  # NON-INFRINGEMENT, or FITNESS FOR A PARTICULAR PURPOSE. You should 
10  # have received a copy of LGPLv2 along with this software; if not, see 
11  # http://www.gnu.org/licenses/old-licenses/lgpl-2.0.txt. 
12  # 
13  # Jeff Ortel <jortel@redhat.com> 
14  # 
15   
16  """ 
17  The I{metrics} module defines classes and other resources 
18  designed for collecting and reporting performance metrics. 
19  """ 
20   
21  import time 
22  from math import modf 
23   
24 -class Timer: 
25   
26 -    def __init__(self, started=0, stopped=0): 
27          self.started = started 
28          self.stopped = stopped 
29   
30 -    def start(self): 
31          self.started = time.time() 
32          self.stopped = 0 
33          return self 
34   
35 -    def stop(self): 
36          if self.started > 0: 
37              self.stopped = time.time() 
38          return self 
39   
40 -    def duration(self): 
41          return ( self.stopped - self.started ) 
42   
43 -    def __str__(self): 
44          if self.started == 0: 
45              return 'not-running' 
46          if self.started > 0 and self.stopped == 0: 
47              return 'started: %d (running)' % self.started 
48          duration = self.duration() 
49          jmod = ( lambda m : (m[1], m[0]*1000) ) 
50          if duration < 1: 
51              ms = (duration*1000) 
52              return '%d (ms)' % ms            
53          if duration < 60: 
54              m = modf(duration) 
55              return '%d.%.3d (seconds)' % jmod(m) 
56          m = modf(duration/60) 
57          return '%d.%.3d (minutes)' % jmod(m) 
58