Source Code for Module buildbot.changes.manager

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13  # 
14  # Copyright Buildbot Team Members 
15   
16  from zope.interface import implements 
17  from twisted.python import log 
18  from twisted.internet import defer 
19  from twisted.application import service 
20  from buildbot import interfaces, config, util 
21  from buildbot.process import metrics 
22   
23 -class ChangeManager(config.ReconfigurableServiceMixin, service.MultiService): 
24      """ 
25      This is the master-side service which receives file change notifications 
26      from version-control systems. 
27   
28      It is a Twisted service, which has instances of 
29      L{buildbot.interfaces.IChangeSource} as child services. These are added by 
30      the master with C{addSource}. 
31      """ 
32   
33      implements(interfaces.IEventSource) 
34   
35      name = "changemanager" 
36   
37 -    def __init__(self, master): 
38          service.MultiService.__init__(self) 
39          self.setName('change_manager') 
40          self.master = master 
41   
42      @defer.deferredGenerator 
43 -    def reconfigService(self, new_config): 
44          timer = metrics.Timer("ChangeManager.reconfigService") 
45          timer.start() 
46   
47          removed, added = util.diffSets( 
48                  set(self), 
49                  new_config.change_sources) 
50   
51          if removed or added: 
52              log.msg("adding %d new changesources, removing %d" % 
53                      (len(added), len(removed))) 
54   
55              for src in removed: 
56                  wfd = defer.waitForDeferred( 
57                      defer.maybeDeferred( 
58                          src.disownServiceParent)) 
59                  yield wfd 
60                  wfd.getResult() 
61                  src.master = None 
62   
63              for src in added: 
64                  src.master = self.master 
65                  src.setServiceParent(self) 
66   
67          num_sources = len(list(self)) 
68          assert num_sources == len(new_config.change_sources) 
69          metrics.MetricCountEvent.log("num_sources", num_sources, absolute=True) 
70   
71          # reconfig any newly-added change sources, as well as existing 
72          wfd = defer.waitForDeferred( 
73              config.ReconfigurableServiceMixin.reconfigService(self, 
74                                                          new_config)) 
75          yield wfd 
76          wfd.getResult() 
77   
78          timer.stop() 
79