Source Code for Module SmootLight.util.ComponentRegistry

 1  import hashlib  
 2  from logger import main_log 
 3  import thread 
 4  #TODO: make component registry a singleton 
 5 -def initRegistry(): 
 6      #TODO: don't overwrite existing registry 
 7      if not 'Registry' in globals(): 
 8          globals()['Registry'] = {} 
 9      makelock() 
10           
11           
12 -def makelock(): 
13      global utilLock 
14      utilLock = thread.allocate_lock() 
15 -def clearRegistry(): 
16      initRegistry() 
17   
18 -def removeComponent(cid): 
19      global Registry 
20      Registry.pop(cid) 
21   
22 -def getLock(): 
23      global utilLock 
24      return utilLock 
25 -def getComponent(cid): 
26      global Registry 
27      return Registry[cid] 
28   
29  #Registry of all components of the light system 
30  #TODO: pick a graceful failure behavior and implement it 
31 -def registerComponent(component, cid=None): 
32      global Registry 
33      if cid != None: 
34          Registry[cid] = component 
35      else: 
36          try: 
37              cid = component['Id'] 
38          except KeyError: 
39              cid = getNewId()  
40              component['Id'] = cid  
41              main_log.debug(cid + 'automatically assigned') 
42          if cid in Registry: 
43              main_log.warn(cid + 'overwritten.') 
44          Registry[cid] = component 
45      return cid 
46   
47 -def verifyUniqueId(cid): 
48      global Registry 
49      return not cid in Registry 
50   
51 -def removeComponent(cid): 
52      global Registry 
53      Registry.pop(cid) 
54   
55 -def getNewId(): 
56      global Registry 
57      trialKey = len(Registry) 
58      trialId = hashlib.md5(str(trialKey)).hexdigest() 
59      while trialId in Registry: 
60          trialKey += 1 
61          trialId = hashlib.md5(str(trialKey)).hexdigest() 
62      return trialId 
63