| | 58 | def __init__(self, kotabackend, arguments) : |
| | 59 | """Initializes querying accounter.""" |
| | 60 | AccounterBase.__init__(self, kotabackend, arguments) |
| | 61 | self.requester = openRequester(kotabackend.config, kotabackend.printername) |
| | 62 | |
| | 63 | def getPrinterInternalPageCounter(self) : |
| | 64 | """Returns the printer's internal page counter.""" |
| | 65 | global MAXTRIES, TIMETOSLEEP |
| | 66 | for i in range(MAXTRIES) : |
| | 67 | try : |
| | 68 | counter = self.requester.getPrinterPageCounter(self.filter.printerhostname) |
| | 69 | except PyKotaRequesterError, msg : |
| | 70 | # can't get actual page counter, assume printer is off or warming up |
| | 71 | # log the message anyway. |
| | 72 | self.filter.logger.log_message("%s" % msg, "warn") |
| | 73 | counter = None |
| | 74 | else : |
| | 75 | # printer answered, it is on so we can exit the loop |
| | 76 | break |
| | 77 | time.sleep(TIMETOSLEEP) |
| | 78 | return counter |
| | 79 | |
| | 80 | def beginJob(self, printer, user) : |
| | 81 | """Saves printer internal page counter at start of job.""" |
| | 82 | # save page counter before job |
| | 83 | self.LastPageCounter = self.counterbefore = self.getPrinterInternalPageCounter() |
| | 84 | |
| | 85 | def endJob(self, printer, user) : |
| | 86 | """Saves printer internal page counter at end of job.""" |
| | 87 | # save page counter after job |
| | 88 | self.LastPageCounter = self.counterafter = self.getPrinterInternalPageCounter() |
| | 89 | |
| | 90 | def getJobSize(self) : |
| | 91 | """Returns the actual job size.""" |
| | 92 | try : |
| | 93 | jobsize = (self.counterafter - self.counterbefore) |
| | 94 | if jobsize < 0 : |
| | 95 | # Try to take care of HP printers |
| | 96 | # Their internal page counter is saved to NVRAM |
| | 97 | # only every 10 pages. If the printer was switched |
| | 98 | # off then back on during the job, and that the |
| | 99 | # counters difference is negative, we know |
| | 100 | # the formula (we can't know if more than eleven |
| | 101 | # pages were printed though) : |
| | 102 | if jobsize > -10 : |
| | 103 | jobsize += 10 |
| | 104 | else : |
| | 105 | # here we may have got a printer being replaced |
| | 106 | # DURING the job. This is HIGHLY improbable ! |
| | 107 | jobsize = 0 |
| | 108 | except : |
| | 109 | # takes care of the case where one counter (or both) was never set. |
| | 110 | jobsize = 0 |
| | 111 | return jobsize |
| | 112 | |
| 59 | | global MAXTRIES, TIMETOSLEEP |
| 60 | | requester = openRequester(self.filter.config, self.filter.printername) |
| 61 | | for i in range(MAXTRIES) : |
| 62 | | try : |
| 63 | | counterbeforejob = requester.getPrinterPageCounter(self.filter.printerhostname) |
| 64 | | except PyKotaRequesterError, msg : |
| 65 | | # can't get actual page counter, assume printer is off or warming up |
| 66 | | # log the message anyway. |
| 67 | | self.filter.logger.log_message("%s" % msg, "warn") |
| 68 | | counterbeforejob = None |
| 69 | | printerIsOff = 1 |
| 70 | | else : |
| 71 | | # printer answered, it is on so we can exit the loop |
| 72 | | printerIsOff = 0 |
| 73 | | break |
| 74 | | time.sleep(TIMETOSLEEP) |
| | 118 | counterbeforejob = self.getPrinterInternalPageCounter() |
