[951ab1b] | 1 | from . import errors |
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[eee389a] | 2 | from .player import Player |
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[b01b6d1] | 3 | from gutenbach.ipp import JobStates as States |
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[ee8e6d0] | 4 | import logging |
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[33ea505] | 5 | import os |
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[d04a689] | 6 | |
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| 7 | # initialize logger |
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| 8 | logger = logging.getLogger(__name__) |
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[776a659] | 9 | |
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[33ea505] | 10 | class GutenbachJob(object): |
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[b2e077a] | 11 | |
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[345c476] | 12 | def __init__(self, job_id=None, creator=None, name=None, |
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| 13 | priority=None, document=None): |
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[b01b6d1] | 14 | """Create an empty Gutenbach job. |
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[e58af05] | 15 | |
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[ef387cf] | 16 | Parameters |
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| 17 | ---------- |
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| 18 | job_id : integer |
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| 19 | A unique id for this job. |
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| 20 | creator : string |
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| 21 | The user creating the job. |
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| 22 | name : string |
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| 23 | The human-readable name of the job. |
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| 24 | priority : integer |
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| 25 | The priority of the job, used for ordering. |
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| 26 | document : file object |
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| 27 | A file object containing the job data. |
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| 28 | |
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[776a659] | 29 | """ |
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[ee8e6d0] | 30 | |
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[b01b6d1] | 31 | self.player = None |
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[345c476] | 32 | self.document = None |
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[ee8e6d0] | 33 | |
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[b01b6d1] | 34 | self.id = job_id |
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| 35 | self.creator = creator |
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| 36 | self.name = name |
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[345c476] | 37 | self.priority = priority |
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[ef387cf] | 38 | |
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[2620618] | 39 | self._why_done = None |
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[345c476] | 40 | |
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| 41 | if document is not None: |
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| 42 | self.spool(document) |
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[ee8e6d0] | 43 | |
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[b01b6d1] | 44 | def __repr__(self): |
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| 45 | return str(self) |
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| 46 | |
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| 47 | def __str__(self): |
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| 48 | return "<Job %d '%s'>" % (self.id, self.name) |
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[e58af05] | 49 | |
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[eee389a] | 50 | def __cmp__(self, other): |
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[ef387cf] | 51 | """Compares two GutenbachJobs based on their priorities. |
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| 52 | |
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| 53 | """ |
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[eee389a] | 54 | return cmp(self.priority, other.priority) |
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| 55 | |
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[57bc2dc] | 56 | def __del__(self): |
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| 57 | if self.player: |
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[bd5bffc] | 58 | if self.player.is_playing: |
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| 59 | self.player.mplayer_stop() |
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[ab7c1dd] | 60 | if self.player.fh: |
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| 61 | if self.player.fh.closed: |
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| 62 | self.player.fh.close() |
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[57bc2dc] | 63 | self.player = None |
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| 64 | |
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[ab7c1dd] | 65 | self.document = None |
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[57bc2dc] | 66 | self.id = None |
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| 67 | self.creator = None |
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| 68 | self.name = None |
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| 69 | self.priority = None |
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| 70 | self._why_done = None |
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| 71 | |
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[b01b6d1] | 72 | ###################################################################### |
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| 73 | ### Properties ### |
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| 74 | ###################################################################### |
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[1a63bf7] | 75 | |
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[b01b6d1] | 76 | @property |
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| 77 | def id(self): |
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[ef387cf] | 78 | """Unique job identifier (integer). Should be a positive |
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| 79 | integer, except when unassigned, when it defaults to -1. |
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[b01b6d1] | 80 | |
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| 81 | """ |
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| 82 | return self._id |
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| 83 | @id.setter |
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| 84 | def id(self, val): |
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[1a63bf7] | 85 | try: |
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[345c476] | 86 | self._id = max(int(val), -1) |
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[951ab1b] | 87 | except: |
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[b01b6d1] | 88 | self._id = -1 |
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| 89 | |
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| 90 | @property |
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[345c476] | 91 | def priority(self): |
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[ef387cf] | 92 | """Job priority (integer). Should be a nonzero positive |
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| 93 | integer; defaults to 1 when unassigned. |
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| 94 | |
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| 95 | """ |
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[345c476] | 96 | return self._priority |
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| 97 | @priority.setter |
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| 98 | def priority(self, val): |
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| 99 | try: |
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| 100 | self._priority = max(int(val), 1) |
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[951ab1b] | 101 | except: |
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[345c476] | 102 | self._priority = 1 |
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| 103 | |
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| 104 | @property |
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[b01b6d1] | 105 | def creator(self): |
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[ef387cf] | 106 | """The user who created the job (string). Defaults to an |
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| 107 | empty string. |
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[b01b6d1] | 108 | |
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| 109 | """ |
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| 110 | return self._creator |
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| 111 | @creator.setter |
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| 112 | def creator(self, val): |
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| 113 | if val is None: |
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| 114 | self._creator = "" |
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| 115 | else: |
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| 116 | self._creator = str(val) |
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| 117 | |
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| 118 | @property |
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| 119 | def name(self): |
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[ef387cf] | 120 | """The job's human-readable name (string). Defaults to an |
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| 121 | empty string. |
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[b01b6d1] | 122 | |
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| 123 | """ |
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| 124 | return self._name |
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| 125 | @name.setter |
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| 126 | def name(self, val): |
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| 127 | if val is None: |
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| 128 | self._name = "" |
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| 129 | else: |
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| 130 | self._name = str(val) |
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| 131 | |
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| 132 | @property |
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| 133 | def size(self): |
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[ef387cf] | 134 | """The size of the job in octets/bytes (integer). Defaults to |
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| 135 | 0 if no document is specified or if there is an error reading |
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| 136 | the document. |
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[1a63bf7] | 137 | |
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[b01b6d1] | 138 | """ |
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[ee8e6d0] | 139 | try: |
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[33ea505] | 140 | size = os.path.getsize(self.document) |
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| 141 | except: |
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| 142 | size = 0 |
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| 143 | return size |
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[b01b6d1] | 144 | |
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[951ab1b] | 145 | ###################################################################### |
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| 146 | ### State ### |
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| 147 | ###################################################################### |
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| 148 | |
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[eee389a] | 149 | @property |
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[345c476] | 150 | def is_valid(self): |
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| 151 | """Whether the job is ready to be manipulated (spooled, |
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| 152 | played, etc). Note that playing the job still requires it to |
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| 153 | be spooled first. |
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| 154 | |
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| 155 | """ |
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[ef387cf] | 156 | |
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[345c476] | 157 | return self.id > 0 and \ |
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| 158 | self.priority > 0 |
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[eee389a] | 159 | |
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| 160 | @property |
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| 161 | def is_ready(self): |
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[ef387cf] | 162 | """Whether the job is ready to be played; i.e., it has all the |
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| 163 | necessary data to actually play the audio data. |
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[345c476] | 164 | |
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| 165 | """ |
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[ef387cf] | 166 | |
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[345c476] | 167 | return self.is_valid and \ |
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| 168 | self.player is not None and \ |
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| 169 | not self.player.is_playing and \ |
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[97f20dd] | 170 | not self._why_done == "canceled" and \ |
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[345c476] | 171 | not self._why_done == "aborted" |
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[eee389a] | 172 | |
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| 173 | @property |
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[345c476] | 174 | def is_playing(self): |
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| 175 | """Whether the job is currently playing (regardless of whether |
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| 176 | it's paused). |
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| 177 | |
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| 178 | """ |
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[ef387cf] | 179 | |
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[345c476] | 180 | return self.is_valid and \ |
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| 181 | self.player is not None and \ |
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| 182 | self.player.is_playing |
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| 183 | |
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| 184 | @property |
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| 185 | def is_paused(self): |
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| 186 | """Whether the job is currently paused. |
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| 187 | |
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| 188 | """ |
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[ef387cf] | 189 | |
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[345c476] | 190 | return self.is_valid and \ |
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| 191 | self.player is not None and \ |
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| 192 | self.player.is_paused |
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| 193 | |
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| 194 | @property |
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| 195 | def is_done(self): |
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[951ab1b] | 196 | """Whether the job is done playing, regardless of whether it |
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| 197 | completed successfully or not. |
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| 198 | |
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| 199 | """ |
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[ef387cf] | 200 | |
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[345c476] | 201 | return (self.is_valid and \ |
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| 202 | self.player is not None and \ |
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| 203 | self.player.is_done) or \ |
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[97f20dd] | 204 | (self._why_done == "canceled" or \ |
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[345c476] | 205 | self._why_done == "aborted") |
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| 206 | |
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| 207 | @property |
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[951ab1b] | 208 | def is_completed(self): |
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| 209 | """Whether the job completed successfully. |
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| 210 | |
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| 211 | """ |
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[ef387cf] | 212 | |
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[951ab1b] | 213 | return self.is_done and self._why_done == "completed" |
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| 214 | |
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| 215 | @property |
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[97f20dd] | 216 | def is_canceled(self): |
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| 217 | """Whether the job was canceled. |
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[951ab1b] | 218 | |
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| 219 | """ |
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[ef387cf] | 220 | |
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[97f20dd] | 221 | return self.is_done and self._why_done == "canceled" |
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[951ab1b] | 222 | |
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| 223 | @property |
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| 224 | def is_aborted(self): |
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| 225 | """Whether the job was aborted. |
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| 226 | |
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| 227 | """ |
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[ef387cf] | 228 | |
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[951ab1b] | 229 | return self.is_done and self._why_done == "aborted" |
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| 230 | |
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| 231 | @property |
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[345c476] | 232 | def state(self): |
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[2834b9a] | 233 | """RFC 2911: 4.3.7 job-state (type1 enum) |
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| 234 | |
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| 235 | 'pending': The job is a candidate to start processing, but is |
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| 236 | not yet processing. |
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| 237 | |
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| 238 | 'pending-held': The job is not a candidate for processing for |
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| 239 | any number of reasons but will return to the 'pending' |
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| 240 | state as soon as the reasons are no longer present. The |
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| 241 | job's 'job-state-reason' attribute MUST indicate why the |
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| 242 | job is no longer a candidate for processing. |
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| 243 | |
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| 244 | 'processing': One or more of: |
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[2620618] | 245 | |
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[2834b9a] | 246 | 1. the job is using, or is attempting to use, one or more |
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| 247 | purely software processes that are analyzing, creating, |
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| 248 | or interpreting a PDL, etc., |
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| 249 | 2. the job is using, or is attempting to use, one or more |
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| 250 | hardware devices that are interpreting a PDL, making |
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| 251 | marks on a medium, and/or performing finishing, such as |
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| 252 | stapling, etc., |
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| 253 | 3. the Printer object has made the job ready for printing, |
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| 254 | but the output device is not yet printing it, either |
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| 255 | because the job hasn't reached the output device or |
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| 256 | because the job is queued in the output device or some |
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| 257 | other spooler, awaiting the output device to print it. |
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| 258 | |
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| 259 | When the job is in the 'processing' state, the entire job |
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| 260 | state includes the detailed status represented in the |
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| 261 | Printer object's 'printer-state', 'printer-state- |
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| 262 | reasons', and 'printer-state-message' attributes. |
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| 263 | |
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| 264 | Implementations MAY, though they NEED NOT, include |
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| 265 | additional values in the job's 'job-state-reasons' |
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| 266 | attribute to indicate the progress of the job, such as |
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| 267 | adding the 'job-printing' value to indicate when the |
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| 268 | output device is actually making marks on paper and/or the |
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| 269 | 'processing-to-stop-point' value to indicate that the IPP |
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| 270 | object is in the process of canceling or aborting the |
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| 271 | job. Most implementations won't bother with this nuance. |
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| 272 | |
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| 273 | 'processing-stopped': The job has stopped while processing for |
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| 274 | any number of reasons and will return to the 'processing' |
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| 275 | state as soon as the reasons are no longer present. |
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| 276 | |
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| 277 | The job's 'job-state-reason' attribute MAY indicate why |
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| 278 | the job has stopped processing. For example, if the output |
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| 279 | device is stopped, the 'printer-stopped' value MAY be |
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| 280 | included in the job's 'job-state-reasons' attribute. |
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| 281 | |
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| 282 | Note: When an output device is stopped, the device usually |
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| 283 | indicates its condition in human readable form locally at |
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| 284 | the device. A client can obtain more complete device |
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| 285 | status remotely by querying the Printer object's |
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| 286 | 'printer-state', 'printer-state-reasons' and 'printer- |
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| 287 | state-message' attributes. |
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| 288 | |
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| 289 | 'canceled': The job has been canceled by a Cancel-Job |
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| 290 | operation and the Printer object has completed canceling |
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| 291 | the job and all job status attributes have reached their |
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| 292 | final values for the job. While the Printer object is |
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| 293 | canceling the job, the job remains in its current state, |
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| 294 | but the job's 'job-state-reasons' attribute SHOULD contain |
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| 295 | the 'processing-to-stop-point' value and one of the |
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| 296 | 'canceled-by-user', 'canceled-by-operator', or |
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| 297 | 'canceled-at-device' value. When the job moves to the |
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| 298 | 'canceled' state, the 'processing-to-stop-point' value, if |
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| 299 | present, MUST be removed, but the 'canceled-by-xxx', if |
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| 300 | present, MUST remain. |
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| 301 | |
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| 302 | 'aborted': The job has been aborted by the system, usually |
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| 303 | while the job was in the 'processing' or 'processing- |
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| 304 | stopped' state and the Printer has completed aborting the |
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| 305 | job and all job status attributes have reached their final |
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| 306 | values for the job. While the Printer object is aborting |
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| 307 | the job, the job remains in its current state, but the |
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| 308 | job's 'job-state-reasons' attribute SHOULD contain the |
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| 309 | 'processing-to-stop-point' and 'aborted-by- system' |
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| 310 | values. When the job moves to the 'aborted' state, the |
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| 311 | 'processing-to-stop-point' value, if present, MUST be |
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| 312 | removed, but the 'aborted-by-system' value, if present, |
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| 313 | MUST remain. |
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| 314 | |
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| 315 | 'completed': The job has completed successfully or with |
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| 316 | warnings or errors after processing and all of the job |
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| 317 | media sheets have been successfully stacked in the |
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| 318 | appropriate output bin(s) and all job status attributes |
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| 319 | have reached their final values for the job. The job's |
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| 320 | 'job-state-reasons' attribute SHOULD contain one of: |
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| 321 | 'completed-successfully', 'completed-with-warnings', or |
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| 322 | 'completed-with-errors' values. |
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| 323 | |
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| 324 | The final value for this attribute MUST be one of: |
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| 325 | 'completed', 'canceled', or 'aborted' before the Printer |
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| 326 | removes the job altogether. The length of time that jobs |
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| 327 | remain in the 'canceled', 'aborted', and 'completed' states |
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| 328 | depends on implementation. See section 4.3.7.2. |
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| 329 | |
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| 330 | The following figure shows the normal job state transitions. |
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| 331 | |
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| 332 | +----> canceled |
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| 333 | / |
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| 334 | +----> pending --------> processing ---------+------> completed |
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| 335 | | ^ ^ \ |
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| 336 | --->+ | | +----> aborted |
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| 337 | | v v / |
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| 338 | +----> pending-held processing-stopped ---+ |
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| 339 | |
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| 340 | Normally a job progresses from left to right. Other state |
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| 341 | transitions are unlikely, but are not forbidden. Not shown are |
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| 342 | the transitions to the 'canceled' state from the 'pending', |
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| 343 | 'pending- held', and 'processing-stopped' states. |
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| 344 | |
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| 345 | Jobs reach one of the three terminal states: 'completed', |
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| 346 | 'canceled', or 'aborted', after the jobs have completed all |
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| 347 | activity, including stacking output media, after the jobs have |
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| 348 | completed all activity, and all job status attributes have |
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| 349 | reached their final values for the job. |
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| 350 | |
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[a2b0582] | 351 | """ |
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[ef387cf] | 352 | |
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[2834b9a] | 353 | # XXX verify that these transitions are correct! |
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| 354 | |
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[345c476] | 355 | if self.is_ready: |
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| 356 | state = States.PENDING |
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| 357 | elif self.is_playing and not self.is_paused: |
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| 358 | state = States.PROCESSING |
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| 359 | elif self.is_playing and self.is_paused: |
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[97f20dd] | 360 | state = States.PROCESSING_STOPPED |
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[951ab1b] | 361 | elif self.is_completed: |
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[97f20dd] | 362 | state = States.COMPLETED |
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| 363 | elif self.is_canceled: |
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| 364 | state = States.CANCELED |
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[951ab1b] | 365 | elif self.is_aborted: |
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[345c476] | 366 | state = States.ABORTED |
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| 367 | else: |
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[97f20dd] | 368 | state = States.PENDING_HELD |
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[345c476] | 369 | return state |
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| 370 | |
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[b01b6d1] | 371 | ###################################################################### |
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| 372 | ### Methods ### |
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| 373 | ###################################################################### |
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| 374 | |
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[951ab1b] | 375 | @staticmethod |
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| 376 | def verify_document(document): |
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[ef387cf] | 377 | """Verifies that a document has the 'name', 'read', and |
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| 378 | 'close' attributes (i.e., it should be like a file object). |
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| 379 | |
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| 380 | """ |
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| 381 | |
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[951ab1b] | 382 | if not hasattr(document, "name"): |
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| 383 | raise errors.InvalidDocument, "no name attribute" |
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| 384 | if not hasattr(document, "read"): |
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| 385 | raise errors.InvalidDocument, "no read attribute" |
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| 386 | if not hasattr(document, "close"): |
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| 387 | raise errors.InvalidDocument, "no close attribute" |
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[57bc2dc] | 388 | if not hasattr(document, "closed"): |
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| 389 | raise errors.InvalidDocument, "no closed attribute" |
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[951ab1b] | 390 | |
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| 391 | def spool(self, document=None): |
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[ef387cf] | 392 | """Non-blocking spool. Job must be valid (see |
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| 393 | 'GutenbachJob.is_valid'), and the document must be an open |
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| 394 | file handler. |
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[951ab1b] | 395 | |
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| 396 | Raises |
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| 397 | ------ |
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| 398 | InvalidDocument |
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| 399 | If the document is not valid. |
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| 400 | InvalidJobStateException |
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| 401 | If the job is not valid or it is already |
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| 402 | spooled/ready/finished. |
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| 403 | |
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| 404 | """ |
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| 405 | |
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[97f20dd] | 406 | if not self.is_valid or self.state != States.PENDING_HELD: |
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[951ab1b] | 407 | raise errors.InvalidJobStateException(self.state) |
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| 408 | self.verify_document(document) |
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[33ea505] | 409 | self.document = document.name |
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| 410 | self.player = Player(document) |
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| 411 | logger.debug("document for job %d is '%s'" % (self.id, self.document)) |
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| 412 | |
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[b01b6d1] | 413 | def play(self): |
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[ef387cf] | 414 | """Non-blocking play. Job must be ready (see |
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| 415 | 'GutenbachJob.is_ready'). |
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[33ea505] | 416 | |
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| 417 | Raises |
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| 418 | ------ |
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| 419 | InvalidJobStateException |
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| 420 | If the job is not ready to be played. |
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[eee389a] | 421 | |
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| 422 | """ |
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| 423 | |
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| 424 | # make sure the job is waiting to be played and that it's |
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| 425 | # valid |
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[33ea505] | 426 | if not self.is_ready: |
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[951ab1b] | 427 | raise errors.InvalidJobStateException(self.state) |
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[eee389a] | 428 | |
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| 429 | # and set the state to processing if we're good to go |
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[b01b6d1] | 430 | logger.info("playing job %s" % str(self)) |
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[33ea505] | 431 | |
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| 432 | def _completed(): |
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| 433 | logger.info("completed job %s" % str(self)) |
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[345c476] | 434 | self._why_done = "completed" |
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[33ea505] | 435 | self.player.callback = _completed |
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[d21198f] | 436 | self.player.start() |
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[eee389a] | 437 | |
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| 438 | def pause(self): |
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[ef387cf] | 439 | """Non-blocking pause. Job must be playing (see |
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| 440 | 'GutenbachJob.is_playing'). |
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[951ab1b] | 441 | |
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| 442 | Raises |
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| 443 | ------ |
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| 444 | InvalidJobStateException |
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| 445 | If the job is not playing. |
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[33ea505] | 446 | |
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| 447 | """ |
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| 448 | |
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| 449 | if not self.is_playing: |
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[951ab1b] | 450 | raise errors.InvalidJobStateException(self.state) |
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[33ea505] | 451 | self.player.mplayer_pause() |
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[34a4e5d] | 452 | |
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[cb0195f] | 453 | def resume(self): |
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| 454 | """Non-blocking resume. Job must be paused (see |
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| 455 | 'GutenbachJob.is_paused'). |
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| 456 | |
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| 457 | Raises |
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| 458 | ------ |
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| 459 | InvalidJobStateException |
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| 460 | If the job is not paused. |
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| 461 | |
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| 462 | """ |
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| 463 | if not self.is_paused: |
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| 464 | raise errors.InvalidJobStateException(self.state) |
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| 465 | self.player.mplayer_pause() |
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| 466 | |
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[34a4e5d] | 467 | def cancel(self): |
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[b8c3505] | 468 | """Blocking cancel. The job must not have been previously |
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[ef387cf] | 469 | aborted or completed (though this method will succeed if it |
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[97f20dd] | 470 | was previously canceled). This should be used to stop the |
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[ef387cf] | 471 | job following an external request. |
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[951ab1b] | 472 | |
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| 473 | Raises |
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| 474 | ------ |
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| 475 | InvalidJobStateException |
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| 476 | If the job has already finished. |
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| 477 | |
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| 478 | """ |
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| 479 | |
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[ca1cfa9] | 480 | if self.player and self.player.is_playing: |
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[b8c3505] | 481 | self.player._callback = None |
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[34a4e5d] | 482 | self.player.mplayer_stop() |
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[b8c3505] | 483 | |
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[97f20dd] | 484 | elif self.is_done and not self._why_done == "canceled": |
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[951ab1b] | 485 | raise errors.InvalidJobStateException(self.state) |
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[b8c3505] | 486 | |
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[97f20dd] | 487 | logger.info("canceled job %s" % str(self)) |
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| 488 | self._why_done = "canceled" |
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[eee389a] | 489 | |
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[34a4e5d] | 490 | def abort(self): |
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[b8c3505] | 491 | """Blocking abort. The job must not have been previously |
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[97f20dd] | 492 | canceled or completed (though this method will succeed if it |
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[ef387cf] | 493 | was previously aborted). This should be used to stop the job |
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| 494 | following internal errors. |
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[951ab1b] | 495 | |
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| 496 | Raises |
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| 497 | ------ |
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| 498 | InvalidJobStateException |
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| 499 | If the job has already finished. |
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| 500 | |
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| 501 | """ |
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| 502 | |
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[ca1cfa9] | 503 | if self.player and self.player.is_playing: |
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[b8c3505] | 504 | self.player._callback = None |
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[eee389a] | 505 | self.player.mplayer_stop() |
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[b8c3505] | 506 | |
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[345c476] | 507 | elif self.is_done and not self._why_done == "aborted": |
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[951ab1b] | 508 | raise errors.InvalidJobStateException(self.state) |
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[b8c3505] | 509 | |
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| 510 | logger.info("aborted job %s" % str(self)) |
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| 511 | self._why_done = "aborted" |
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[776a659] | 512 | |
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[609a9b0] | 513 | def restart(self): |
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[c1cebbc] | 514 | """Non-blocking restart. Job must be finished (see |
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| 515 | 'GutenbachJob.is_done'), and will be ready to be played (see |
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| 516 | 'GutenbachJob.is_ready') if this method is successful. |
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| 517 | |
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| 518 | Raises |
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| 519 | ------ |
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| 520 | InvalidJobStateException |
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| 521 | If the job is not done. |
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| 522 | |
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| 523 | """ |
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| 524 | |
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| 525 | if not self.is_done: |
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| 526 | raise errors.InvalidJobStateException(self.state) |
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| 527 | |
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[0494098] | 528 | logger.debug("restarting job %d", self.id) |
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[c1cebbc] | 529 | |
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| 530 | self._why_done = None |
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[0494098] | 531 | fh = self.player.fh |
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| 532 | |
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| 533 | if not fh or fh.closed: |
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| 534 | raise RuntimeError, "file handler is closed" |
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| 535 | |
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| 536 | self.player = Player(fh) |
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