root / lib / jqueue.py @ ac0930b9
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2 | 498ae1cc | Iustin Pop | #
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3 | 498ae1cc | Iustin Pop | |
4 | 498ae1cc | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | 498ae1cc | Iustin Pop | #
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6 | 498ae1cc | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | 498ae1cc | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | 498ae1cc | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | 498ae1cc | Iustin Pop | # (at your option) any later version.
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10 | 498ae1cc | Iustin Pop | #
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11 | 498ae1cc | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | 498ae1cc | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 498ae1cc | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 498ae1cc | Iustin Pop | # General Public License for more details.
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15 | 498ae1cc | Iustin Pop | #
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16 | 498ae1cc | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | 498ae1cc | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | 498ae1cc | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 498ae1cc | Iustin Pop | # 02110-1301, USA.
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20 | 498ae1cc | Iustin Pop | |
21 | 498ae1cc | Iustin Pop | |
22 | 498ae1cc | Iustin Pop | """Module implementing the job queue handling."""
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23 | 498ae1cc | Iustin Pop | |
24 | f1da30e6 | Michael Hanselmann | import os |
25 | e2715f69 | Michael Hanselmann | import logging |
26 | e2715f69 | Michael Hanselmann | import threading |
27 | f1da30e6 | Michael Hanselmann | import errno |
28 | f1da30e6 | Michael Hanselmann | import re |
29 | 498ae1cc | Iustin Pop | |
30 | e2715f69 | Michael Hanselmann | from ganeti import constants |
31 | f1da30e6 | Michael Hanselmann | from ganeti import serializer |
32 | e2715f69 | Michael Hanselmann | from ganeti import workerpool |
33 | f1da30e6 | Michael Hanselmann | from ganeti import opcodes |
34 | 7a1ecaed | Iustin Pop | from ganeti import errors |
35 | e2715f69 | Michael Hanselmann | from ganeti import mcpu |
36 | 7996a135 | Iustin Pop | from ganeti import utils |
37 | e2715f69 | Michael Hanselmann | |
38 | e2715f69 | Michael Hanselmann | |
39 | e2715f69 | Michael Hanselmann | JOBQUEUE_THREADS = 5
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40 | e2715f69 | Michael Hanselmann | |
41 | 498ae1cc | Iustin Pop | |
42 | e2715f69 | Michael Hanselmann | class _QueuedOpCode(object): |
43 | e2715f69 | Michael Hanselmann | """Encasulates an opcode object.
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44 | e2715f69 | Michael Hanselmann |
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45 | 307149a8 | Iustin Pop | Access is synchronized by the '_lock' attribute.
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46 | e2715f69 | Michael Hanselmann |
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47 | e2715f69 | Michael Hanselmann | """
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48 | e2715f69 | Michael Hanselmann | def __init__(self, op): |
49 | f1da30e6 | Michael Hanselmann | self.__Setup(op, constants.OP_STATUS_QUEUED, None) |
50 | f1da30e6 | Michael Hanselmann | |
51 | f1da30e6 | Michael Hanselmann | def __Setup(self, input, status, result): |
52 | 307149a8 | Iustin Pop | self._lock = threading.Lock()
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53 | f1da30e6 | Michael Hanselmann | self.input = input |
54 | f1da30e6 | Michael Hanselmann | self.status = status
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55 | f1da30e6 | Michael Hanselmann | self.result = result
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56 | f1da30e6 | Michael Hanselmann | |
57 | f1da30e6 | Michael Hanselmann | @classmethod
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58 | f1da30e6 | Michael Hanselmann | def Restore(cls, state): |
59 | f1da30e6 | Michael Hanselmann | obj = object.__new__(cls)
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60 | f1da30e6 | Michael Hanselmann | obj.__Setup(opcodes.OpCode.LoadOpCode(state["input"]),
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61 | f1da30e6 | Michael Hanselmann | state["status"], state["result"]) |
62 | f1da30e6 | Michael Hanselmann | return obj
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63 | f1da30e6 | Michael Hanselmann | |
64 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
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65 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
66 | f1da30e6 | Michael Hanselmann | return {
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67 | f1da30e6 | Michael Hanselmann | "input": self.input.__getstate__(), |
68 | f1da30e6 | Michael Hanselmann | "status": self.status, |
69 | f1da30e6 | Michael Hanselmann | "result": self.result, |
70 | f1da30e6 | Michael Hanselmann | } |
71 | 307149a8 | Iustin Pop | |
72 | 307149a8 | Iustin Pop | @utils.LockedMethod
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73 | af30b2fd | Michael Hanselmann | def GetInput(self): |
74 | af30b2fd | Michael Hanselmann | """Returns the original opcode.
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75 | af30b2fd | Michael Hanselmann |
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76 | af30b2fd | Michael Hanselmann | """
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77 | af30b2fd | Michael Hanselmann | return self.input |
78 | af30b2fd | Michael Hanselmann | |
79 | af30b2fd | Michael Hanselmann | @utils.LockedMethod
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80 | 307149a8 | Iustin Pop | def SetStatus(self, status, result): |
81 | 307149a8 | Iustin Pop | """Update the opcode status and result.
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82 | 307149a8 | Iustin Pop |
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83 | 307149a8 | Iustin Pop | """
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84 | 307149a8 | Iustin Pop | self.status = status
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85 | 307149a8 | Iustin Pop | self.result = result
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86 | 307149a8 | Iustin Pop | |
87 | 307149a8 | Iustin Pop | @utils.LockedMethod
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88 | 307149a8 | Iustin Pop | def GetStatus(self): |
89 | 307149a8 | Iustin Pop | """Get the opcode status.
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90 | 307149a8 | Iustin Pop |
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91 | 307149a8 | Iustin Pop | """
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92 | 307149a8 | Iustin Pop | return self.status |
93 | 307149a8 | Iustin Pop | |
94 | 307149a8 | Iustin Pop | @utils.LockedMethod
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95 | 307149a8 | Iustin Pop | def GetResult(self): |
96 | 307149a8 | Iustin Pop | """Get the opcode result.
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97 | 307149a8 | Iustin Pop |
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98 | 307149a8 | Iustin Pop | """
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99 | 307149a8 | Iustin Pop | return self.result |
100 | e2715f69 | Michael Hanselmann | |
101 | e2715f69 | Michael Hanselmann | |
102 | e2715f69 | Michael Hanselmann | class _QueuedJob(object): |
103 | e2715f69 | Michael Hanselmann | """In-memory job representation.
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104 | e2715f69 | Michael Hanselmann |
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105 | e2715f69 | Michael Hanselmann | This is what we use to track the user-submitted jobs.
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106 | e2715f69 | Michael Hanselmann |
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107 | e2715f69 | Michael Hanselmann | """
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108 | f1da30e6 | Michael Hanselmann | def __init__(self, storage, job_id, ops): |
109 | e2715f69 | Michael Hanselmann | if not ops: |
110 | e2715f69 | Michael Hanselmann | # TODO
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111 | e2715f69 | Michael Hanselmann | raise Exception("No opcodes") |
112 | e2715f69 | Michael Hanselmann | |
113 | f1da30e6 | Michael Hanselmann | self.__Setup(storage, job_id, [_QueuedOpCode(op) for op in ops]) |
114 | e2715f69 | Michael Hanselmann | |
115 | f1da30e6 | Michael Hanselmann | def __Setup(self, storage, job_id, ops): |
116 | f1da30e6 | Michael Hanselmann | self.storage = storage
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117 | f1da30e6 | Michael Hanselmann | self.id = job_id
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118 | f1da30e6 | Michael Hanselmann | self._ops = ops
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119 | f1da30e6 | Michael Hanselmann | |
120 | f1da30e6 | Michael Hanselmann | @classmethod
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121 | f1da30e6 | Michael Hanselmann | def Restore(cls, storage, state): |
122 | f1da30e6 | Michael Hanselmann | obj = object.__new__(cls)
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123 | f1da30e6 | Michael Hanselmann | obj.__Setup(storage, state["id"],
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124 | f1da30e6 | Michael Hanselmann | [_QueuedOpCode.Restore(op_state) for op_state in state["ops"]]) |
125 | f1da30e6 | Michael Hanselmann | return obj
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126 | f1da30e6 | Michael Hanselmann | |
127 | f1da30e6 | Michael Hanselmann | def Serialize(self): |
128 | f1da30e6 | Michael Hanselmann | return {
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129 | f1da30e6 | Michael Hanselmann | "id": self.id, |
130 | f1da30e6 | Michael Hanselmann | "ops": [op.Serialize() for op in self._ops], |
131 | f1da30e6 | Michael Hanselmann | } |
132 | f1da30e6 | Michael Hanselmann | |
133 | f1da30e6 | Michael Hanselmann | def SetUnclean(self, msg): |
134 | f1da30e6 | Michael Hanselmann | try:
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135 | f1da30e6 | Michael Hanselmann | for op in self._ops: |
136 | f1da30e6 | Michael Hanselmann | op.SetStatus(constants.OP_STATUS_ERROR, msg) |
137 | f1da30e6 | Michael Hanselmann | finally:
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138 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
139 | e2715f69 | Michael Hanselmann | |
140 | 307149a8 | Iustin Pop | def GetStatus(self): |
141 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_QUEUED |
142 | e2715f69 | Michael Hanselmann | |
143 | e2715f69 | Michael Hanselmann | all_success = True
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144 | e2715f69 | Michael Hanselmann | for op in self._ops: |
145 | 307149a8 | Iustin Pop | op_status = op.GetStatus() |
146 | 307149a8 | Iustin Pop | if op_status == constants.OP_STATUS_SUCCESS:
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147 | e2715f69 | Michael Hanselmann | continue
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148 | e2715f69 | Michael Hanselmann | |
149 | e2715f69 | Michael Hanselmann | all_success = False
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150 | e2715f69 | Michael Hanselmann | |
151 | 307149a8 | Iustin Pop | if op_status == constants.OP_STATUS_QUEUED:
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152 | e2715f69 | Michael Hanselmann | pass
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153 | 307149a8 | Iustin Pop | elif op_status == constants.OP_STATUS_RUNNING:
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154 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_RUNNING |
155 | f1da30e6 | Michael Hanselmann | elif op_status == constants.OP_STATUS_ERROR:
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156 | f1da30e6 | Michael Hanselmann | status = constants.JOB_STATUS_ERROR |
157 | f1da30e6 | Michael Hanselmann | # The whole job fails if one opcode failed
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158 | f1da30e6 | Michael Hanselmann | break
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159 | e2715f69 | Michael Hanselmann | |
160 | e2715f69 | Michael Hanselmann | if all_success:
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161 | e2715f69 | Michael Hanselmann | status = constants.JOB_STATUS_SUCCESS |
162 | e2715f69 | Michael Hanselmann | |
163 | e2715f69 | Michael Hanselmann | return status
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164 | e2715f69 | Michael Hanselmann | |
165 | e2715f69 | Michael Hanselmann | def Run(self, proc): |
166 | e2715f69 | Michael Hanselmann | """Job executor.
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167 | e2715f69 | Michael Hanselmann |
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168 | e2715f69 | Michael Hanselmann | This functions processes a this job in the context of given processor
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169 | e2715f69 | Michael Hanselmann | instance.
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170 | e2715f69 | Michael Hanselmann |
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171 | e2715f69 | Michael Hanselmann | Args:
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172 | e2715f69 | Michael Hanselmann | - proc: Ganeti Processor to run the job with
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173 | e2715f69 | Michael Hanselmann |
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174 | e2715f69 | Michael Hanselmann | """
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175 | e2715f69 | Michael Hanselmann | try:
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176 | c8549bfd | Michael Hanselmann | count = len(self._ops) |
177 | c8549bfd | Michael Hanselmann | for idx, op in enumerate(self._ops): |
178 | e2715f69 | Michael Hanselmann | try:
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179 | 307149a8 | Iustin Pop | logging.debug("Op %s/%s: Starting %s", idx + 1, count, op) |
180 | 307149a8 | Iustin Pop | op.SetStatus(constants.OP_STATUS_RUNNING, None)
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181 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
182 | e2715f69 | Michael Hanselmann | |
183 | e2715f69 | Michael Hanselmann | result = proc.ExecOpCode(op.input) |
184 | e2715f69 | Michael Hanselmann | |
185 | 307149a8 | Iustin Pop | op.SetStatus(constants.OP_STATUS_SUCCESS, result) |
186 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
187 | 307149a8 | Iustin Pop | logging.debug("Op %s/%s: Successfully finished %s",
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188 | 307149a8 | Iustin Pop | idx + 1, count, op)
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189 | e2715f69 | Michael Hanselmann | except Exception, err: |
190 | f1da30e6 | Michael Hanselmann | try:
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191 | f1da30e6 | Michael Hanselmann | op.SetStatus(constants.OP_STATUS_ERROR, str(err))
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192 | f1da30e6 | Michael Hanselmann | logging.debug("Op %s/%s: Error in %s", idx + 1, count, op) |
193 | f1da30e6 | Michael Hanselmann | finally:
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194 | f1da30e6 | Michael Hanselmann | self.storage.UpdateJob(self) |
195 | e2715f69 | Michael Hanselmann | raise
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196 | e2715f69 | Michael Hanselmann | |
197 | e2715f69 | Michael Hanselmann | except errors.GenericError, err:
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198 | e2715f69 | Michael Hanselmann | logging.error("ganeti exception %s", exc_info=err)
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199 | e2715f69 | Michael Hanselmann | except Exception, err: |
200 | e2715f69 | Michael Hanselmann | logging.error("unhandled exception %s", exc_info=err)
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201 | e2715f69 | Michael Hanselmann | except:
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202 | e2715f69 | Michael Hanselmann | logging.error("unhandled unknown exception %s", exc_info=err)
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203 | e2715f69 | Michael Hanselmann | |
204 | e2715f69 | Michael Hanselmann | |
205 | e2715f69 | Michael Hanselmann | class _JobQueueWorker(workerpool.BaseWorker): |
206 | e2715f69 | Michael Hanselmann | def RunTask(self, job): |
207 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s processing job %s",
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208 | e2715f69 | Michael Hanselmann | self.worker_id, job.id)
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209 | e2715f69 | Michael Hanselmann | # TODO: feedback function
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210 | e2715f69 | Michael Hanselmann | proc = mcpu.Processor(self.pool.context, feedback=lambda x: None) |
211 | e2715f69 | Michael Hanselmann | try:
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212 | e2715f69 | Michael Hanselmann | job.Run(proc) |
213 | e2715f69 | Michael Hanselmann | finally:
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214 | e2715f69 | Michael Hanselmann | logging.debug("Worker %s finished job %s, status = %s",
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215 | e2715f69 | Michael Hanselmann | self.worker_id, job.id, job.GetStatus())
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216 | e2715f69 | Michael Hanselmann | |
217 | e2715f69 | Michael Hanselmann | |
218 | e2715f69 | Michael Hanselmann | class _JobQueueWorkerPool(workerpool.WorkerPool): |
219 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
220 | e2715f69 | Michael Hanselmann | super(_JobQueueWorkerPool, self).__init__(JOBQUEUE_THREADS, |
221 | e2715f69 | Michael Hanselmann | _JobQueueWorker) |
222 | e2715f69 | Michael Hanselmann | self.context = context
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223 | e2715f69 | Michael Hanselmann | |
224 | e2715f69 | Michael Hanselmann | |
225 | f1da30e6 | Michael Hanselmann | class JobStorage(object): |
226 | 911a495b | Iustin Pop | _RE_JOB_FILE = re.compile(r"^job-(\d+)$")
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227 | f1da30e6 | Michael Hanselmann | |
228 | f1da30e6 | Michael Hanselmann | def __init__(self): |
229 | f1da30e6 | Michael Hanselmann | self._lock = threading.Lock()
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230 | ac0930b9 | Iustin Pop | self._memcache = {}
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231 | f1da30e6 | Michael Hanselmann | |
232 | f1da30e6 | Michael Hanselmann | # Make sure our directory exists
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233 | f1da30e6 | Michael Hanselmann | try:
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234 | f1da30e6 | Michael Hanselmann | os.mkdir(constants.QUEUE_DIR, 0700)
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235 | f1da30e6 | Michael Hanselmann | except OSError, err: |
236 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.EEXIST, ): |
237 | f1da30e6 | Michael Hanselmann | raise
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238 | f1da30e6 | Michael Hanselmann | |
239 | f1da30e6 | Michael Hanselmann | # Get queue lock
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240 | f1da30e6 | Michael Hanselmann | self.lock_fd = open(constants.JOB_QUEUE_LOCK_FILE, "w") |
241 | f1da30e6 | Michael Hanselmann | try:
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242 | f1da30e6 | Michael Hanselmann | utils.LockFile(self.lock_fd)
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243 | f1da30e6 | Michael Hanselmann | except:
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244 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
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245 | f1da30e6 | Michael Hanselmann | raise
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246 | f1da30e6 | Michael Hanselmann | |
247 | f1da30e6 | Michael Hanselmann | # Read version
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248 | f1da30e6 | Michael Hanselmann | try:
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249 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
250 | f1da30e6 | Michael Hanselmann | except IOError, err: |
251 | f1da30e6 | Michael Hanselmann | if err.errno not in (errno.ENOENT, ): |
252 | f1da30e6 | Michael Hanselmann | raise
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253 | f1da30e6 | Michael Hanselmann | |
254 | f1da30e6 | Michael Hanselmann | # Setup a new queue
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255 | f1da30e6 | Michael Hanselmann | self._InitQueueUnlocked()
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256 | f1da30e6 | Michael Hanselmann | |
257 | f1da30e6 | Michael Hanselmann | # Try to open again
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258 | f1da30e6 | Michael Hanselmann | version_fd = open(constants.JOB_QUEUE_VERSION_FILE, "r") |
259 | f1da30e6 | Michael Hanselmann | |
260 | f1da30e6 | Michael Hanselmann | try:
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261 | f1da30e6 | Michael Hanselmann | # Try to read version
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262 | f1da30e6 | Michael Hanselmann | version = int(version_fd.read(128)) |
263 | f1da30e6 | Michael Hanselmann | |
264 | f1da30e6 | Michael Hanselmann | # Verify version
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265 | f1da30e6 | Michael Hanselmann | if version != constants.JOB_QUEUE_VERSION:
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266 | f1da30e6 | Michael Hanselmann | raise errors.JobQueueError("Found version %s, expected %s", |
267 | f1da30e6 | Michael Hanselmann | version, constants.JOB_QUEUE_VERSION) |
268 | f1da30e6 | Michael Hanselmann | finally:
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269 | f1da30e6 | Michael Hanselmann | version_fd.close() |
270 | f1da30e6 | Michael Hanselmann | |
271 | f1da30e6 | Michael Hanselmann | serial_fd = open(constants.JOB_QUEUE_SERIAL_FILE, "r") |
272 | f1da30e6 | Michael Hanselmann | try:
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273 | f1da30e6 | Michael Hanselmann | # Read last serial
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274 | f1da30e6 | Michael Hanselmann | self._last_serial = int(serial_fd.read(1024).strip()) |
275 | f1da30e6 | Michael Hanselmann | finally:
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276 | f1da30e6 | Michael Hanselmann | serial_fd.close() |
277 | f1da30e6 | Michael Hanselmann | |
278 | f1da30e6 | Michael Hanselmann | def Close(self): |
279 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
280 | f1da30e6 | Michael Hanselmann | |
281 | f1da30e6 | Michael Hanselmann | self.lock_fd.close()
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282 | f1da30e6 | Michael Hanselmann | self.lock_fd = None |
283 | f1da30e6 | Michael Hanselmann | |
284 | f1da30e6 | Michael Hanselmann | def _InitQueueUnlocked(self): |
285 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
286 | f1da30e6 | Michael Hanselmann | |
287 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_VERSION_FILE, |
288 | f1da30e6 | Michael Hanselmann | data="%s\n" % constants.JOB_QUEUE_VERSION)
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289 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
290 | f1da30e6 | Michael Hanselmann | data="%s\n" % 0) |
291 | f1da30e6 | Michael Hanselmann | |
292 | f1da30e6 | Michael Hanselmann | def _NewSerialUnlocked(self): |
293 | f1da30e6 | Michael Hanselmann | """Generates a new job identifier.
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294 | f1da30e6 | Michael Hanselmann |
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295 | f1da30e6 | Michael Hanselmann | Job identifiers are unique during the lifetime of a cluster.
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296 | f1da30e6 | Michael Hanselmann |
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297 | f1da30e6 | Michael Hanselmann | Returns: A string representing the job identifier.
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298 | f1da30e6 | Michael Hanselmann |
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299 | f1da30e6 | Michael Hanselmann | """
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300 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
301 | f1da30e6 | Michael Hanselmann | |
302 | f1da30e6 | Michael Hanselmann | # New number
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303 | f1da30e6 | Michael Hanselmann | serial = self._last_serial + 1 |
304 | f1da30e6 | Michael Hanselmann | |
305 | f1da30e6 | Michael Hanselmann | # Write to file
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306 | f1da30e6 | Michael Hanselmann | utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE, |
307 | f1da30e6 | Michael Hanselmann | data="%s\n" % serial)
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308 | f1da30e6 | Michael Hanselmann | |
309 | f1da30e6 | Michael Hanselmann | # Keep it only if we were able to write the file
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310 | f1da30e6 | Michael Hanselmann | self._last_serial = serial
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311 | f1da30e6 | Michael Hanselmann | |
312 | f1da30e6 | Michael Hanselmann | return serial
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313 | f1da30e6 | Michael Hanselmann | |
314 | f1da30e6 | Michael Hanselmann | def _GetJobPath(self, job_id): |
315 | f1da30e6 | Michael Hanselmann | return os.path.join(constants.QUEUE_DIR, "job-%s" % job_id) |
316 | f1da30e6 | Michael Hanselmann | |
317 | 911a495b | Iustin Pop | def _GetJobIDsUnlocked(self, archived=False): |
318 | 911a495b | Iustin Pop | """Return all known job IDs.
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319 | 911a495b | Iustin Pop |
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320 | 911a495b | Iustin Pop | If the parameter archived is True, archived jobs IDs will be
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321 | 911a495b | Iustin Pop | included. Currently this argument is unused.
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322 | 911a495b | Iustin Pop |
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323 | ac0930b9 | Iustin Pop | The method only looks at disk because it's a requirement that all
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324 | ac0930b9 | Iustin Pop | jobs are present on disk (so in the _memcache we don't have any
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325 | ac0930b9 | Iustin Pop | extra IDs).
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326 | ac0930b9 | Iustin Pop |
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327 | 911a495b | Iustin Pop | """
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328 | 911a495b | Iustin Pop | jfiles = self._ListJobFiles()
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329 | 8a70e415 | Iustin Pop | return [int(m.group(1)) for m in |
330 | 911a495b | Iustin Pop | [self._RE_JOB_FILE.match(name) for name in jfiles]] |
331 | 911a495b | Iustin Pop | |
332 | f1da30e6 | Michael Hanselmann | def _ListJobFiles(self): |
333 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
334 | f1da30e6 | Michael Hanselmann | |
335 | f1da30e6 | Michael Hanselmann | return [name for name in utils.ListVisibleFiles(constants.QUEUE_DIR) |
336 | f1da30e6 | Michael Hanselmann | if self._RE_JOB_FILE.match(name)] |
337 | f1da30e6 | Michael Hanselmann | |
338 | 911a495b | Iustin Pop | def _LoadJobUnlocked(self, job_id): |
339 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
340 | f1da30e6 | Michael Hanselmann | |
341 | ac0930b9 | Iustin Pop | if job_id in self._memcache: |
342 | ac0930b9 | Iustin Pop | logging.debug("Found job %d in memcache", job_id)
|
343 | ac0930b9 | Iustin Pop | return self._memcache[job_id] |
344 | ac0930b9 | Iustin Pop | |
345 | 911a495b | Iustin Pop | filepath = self._GetJobPath(job_id)
|
346 | f1da30e6 | Michael Hanselmann | logging.debug("Loading job from %s", filepath)
|
347 | f1da30e6 | Michael Hanselmann | try:
|
348 | f1da30e6 | Michael Hanselmann | fd = open(filepath, "r") |
349 | f1da30e6 | Michael Hanselmann | except IOError, err: |
350 | f1da30e6 | Michael Hanselmann | if err.errno in (errno.ENOENT, ): |
351 | f1da30e6 | Michael Hanselmann | return None |
352 | f1da30e6 | Michael Hanselmann | raise
|
353 | f1da30e6 | Michael Hanselmann | try:
|
354 | f1da30e6 | Michael Hanselmann | data = serializer.LoadJson(fd.read()) |
355 | f1da30e6 | Michael Hanselmann | finally:
|
356 | f1da30e6 | Michael Hanselmann | fd.close() |
357 | f1da30e6 | Michael Hanselmann | |
358 | ac0930b9 | Iustin Pop | job = _QueuedJob.Restore(self, data)
|
359 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
360 | ac0930b9 | Iustin Pop | logging.debug("Added job %d to the cache", job_id)
|
361 | ac0930b9 | Iustin Pop | return job
|
362 | f1da30e6 | Michael Hanselmann | |
363 | f1da30e6 | Michael Hanselmann | def _GetJobsUnlocked(self, job_ids): |
364 | 911a495b | Iustin Pop | if not job_ids: |
365 | 911a495b | Iustin Pop | job_ids = self._GetJobIDsUnlocked()
|
366 | f1da30e6 | Michael Hanselmann | |
367 | 911a495b | Iustin Pop | return [self._LoadJobUnlocked(job_id) for job_id in job_ids] |
368 | f1da30e6 | Michael Hanselmann | |
369 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
370 | f1da30e6 | Michael Hanselmann | def GetJobs(self, job_ids): |
371 | f1da30e6 | Michael Hanselmann | return self._GetJobsUnlocked(job_ids) |
372 | f1da30e6 | Michael Hanselmann | |
373 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
374 | f1da30e6 | Michael Hanselmann | def AddJob(self, ops): |
375 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
376 | f1da30e6 | Michael Hanselmann | |
377 | f1da30e6 | Michael Hanselmann | # Get job identifier
|
378 | f1da30e6 | Michael Hanselmann | job_id = self._NewSerialUnlocked()
|
379 | f1da30e6 | Michael Hanselmann | job = _QueuedJob(self, job_id, ops)
|
380 | f1da30e6 | Michael Hanselmann | |
381 | f1da30e6 | Michael Hanselmann | # Write to disk
|
382 | f1da30e6 | Michael Hanselmann | self._UpdateJobUnlocked(job)
|
383 | f1da30e6 | Michael Hanselmann | |
384 | ac0930b9 | Iustin Pop | logging.debug("Added new job %d to the cache", job_id)
|
385 | ac0930b9 | Iustin Pop | self._memcache[job_id] = job
|
386 | ac0930b9 | Iustin Pop | |
387 | f1da30e6 | Michael Hanselmann | return job
|
388 | f1da30e6 | Michael Hanselmann | |
389 | f1da30e6 | Michael Hanselmann | def _UpdateJobUnlocked(self, job): |
390 | f1da30e6 | Michael Hanselmann | assert self.lock_fd, "Queue should be open" |
391 | f1da30e6 | Michael Hanselmann | |
392 | f1da30e6 | Michael Hanselmann | filename = self._GetJobPath(job.id)
|
393 | f1da30e6 | Michael Hanselmann | logging.debug("Writing job %s to %s", job.id, filename)
|
394 | f1da30e6 | Michael Hanselmann | utils.WriteFile(filename, |
395 | f1da30e6 | Michael Hanselmann | data=serializer.DumpJson(job.Serialize(), indent=False))
|
396 | ac0930b9 | Iustin Pop | self._CleanCacheUnlocked(exceptions=[job.id])
|
397 | ac0930b9 | Iustin Pop | |
398 | ac0930b9 | Iustin Pop | def _CleanCacheUnlocked(self, exceptions=None): |
399 | ac0930b9 | Iustin Pop | """Clean the memory cache.
|
400 | ac0930b9 | Iustin Pop |
|
401 | ac0930b9 | Iustin Pop | The exceptions argument contains job IDs that should not be
|
402 | ac0930b9 | Iustin Pop | cleaned.
|
403 | ac0930b9 | Iustin Pop |
|
404 | ac0930b9 | Iustin Pop | """
|
405 | ac0930b9 | Iustin Pop | assert isinstance(exceptions, list) |
406 | ac0930b9 | Iustin Pop | for job in self._memcache.values(): |
407 | ac0930b9 | Iustin Pop | if job.id in exceptions: |
408 | ac0930b9 | Iustin Pop | continue
|
409 | ac0930b9 | Iustin Pop | if job.GetStatus() not in (constants.JOB_STATUS_QUEUED, |
410 | ac0930b9 | Iustin Pop | constants.JOB_STATUS_RUNNING): |
411 | ac0930b9 | Iustin Pop | logging.debug("Cleaning job %d from the cache", job.id)
|
412 | ac0930b9 | Iustin Pop | try:
|
413 | ac0930b9 | Iustin Pop | del self._memcache[job.id] |
414 | ac0930b9 | Iustin Pop | except KeyError: |
415 | ac0930b9 | Iustin Pop | pass
|
416 | f1da30e6 | Michael Hanselmann | |
417 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
418 | f1da30e6 | Michael Hanselmann | def UpdateJob(self, job): |
419 | f1da30e6 | Michael Hanselmann | return self._UpdateJobUnlocked(job) |
420 | f1da30e6 | Michael Hanselmann | |
421 | f1da30e6 | Michael Hanselmann | def ArchiveJob(self, job_id): |
422 | f1da30e6 | Michael Hanselmann | raise NotImplementedError() |
423 | f1da30e6 | Michael Hanselmann | |
424 | f1da30e6 | Michael Hanselmann | |
425 | e2715f69 | Michael Hanselmann | class JobQueue: |
426 | e2715f69 | Michael Hanselmann | """The job queue.
|
427 | e2715f69 | Michael Hanselmann |
|
428 | e2715f69 | Michael Hanselmann | """
|
429 | e2715f69 | Michael Hanselmann | def __init__(self, context): |
430 | e2715f69 | Michael Hanselmann | self._lock = threading.Lock()
|
431 | f1da30e6 | Michael Hanselmann | self._jobs = JobStorage()
|
432 | e2715f69 | Michael Hanselmann | self._wpool = _JobQueueWorkerPool(context)
|
433 | e2715f69 | Michael Hanselmann | |
434 | f1da30e6 | Michael Hanselmann | for job in self._jobs.GetJobs(None): |
435 | f1da30e6 | Michael Hanselmann | status = job.GetStatus() |
436 | f1da30e6 | Michael Hanselmann | if status in (constants.JOB_STATUS_QUEUED, ): |
437 | f1da30e6 | Michael Hanselmann | self._wpool.AddTask(job)
|
438 | e2715f69 | Michael Hanselmann | |
439 | f1da30e6 | Michael Hanselmann | elif status in (constants.JOB_STATUS_RUNNING, ): |
440 | f1da30e6 | Michael Hanselmann | logging.warning("Unfinished job %s found: %s", job.id, job)
|
441 | f1da30e6 | Michael Hanselmann | job.SetUnclean("Unclean master daemon shutdown")
|
442 | e2715f69 | Michael Hanselmann | |
443 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
444 | e2715f69 | Michael Hanselmann | def SubmitJob(self, ops): |
445 | e2715f69 | Michael Hanselmann | """Add a new job to the queue.
|
446 | e2715f69 | Michael Hanselmann |
|
447 | e2715f69 | Michael Hanselmann | This enters the job into our job queue and also puts it on the new
|
448 | e2715f69 | Michael Hanselmann | queue, in order for it to be picked up by the queue processors.
|
449 | e2715f69 | Michael Hanselmann |
|
450 | e2715f69 | Michael Hanselmann | Args:
|
451 | e2715f69 | Michael Hanselmann | - ops: Sequence of opcodes
|
452 | e2715f69 | Michael Hanselmann |
|
453 | e2715f69 | Michael Hanselmann | """
|
454 | f1da30e6 | Michael Hanselmann | job = self._jobs.AddJob(ops)
|
455 | e2715f69 | Michael Hanselmann | |
456 | e2715f69 | Michael Hanselmann | # Add to worker pool
|
457 | e2715f69 | Michael Hanselmann | self._wpool.AddTask(job)
|
458 | e2715f69 | Michael Hanselmann | |
459 | f1da30e6 | Michael Hanselmann | return job.id
|
460 | e2715f69 | Michael Hanselmann | |
461 | e2715f69 | Michael Hanselmann | def ArchiveJob(self, job_id): |
462 | e2715f69 | Michael Hanselmann | raise NotImplementedError() |
463 | e2715f69 | Michael Hanselmann | |
464 | e2715f69 | Michael Hanselmann | def CancelJob(self, job_id): |
465 | e2715f69 | Michael Hanselmann | raise NotImplementedError() |
466 | e2715f69 | Michael Hanselmann | |
467 | e2715f69 | Michael Hanselmann | def _GetJobInfo(self, job, fields): |
468 | e2715f69 | Michael Hanselmann | row = [] |
469 | e2715f69 | Michael Hanselmann | for fname in fields: |
470 | e2715f69 | Michael Hanselmann | if fname == "id": |
471 | e2715f69 | Michael Hanselmann | row.append(job.id) |
472 | e2715f69 | Michael Hanselmann | elif fname == "status": |
473 | e2715f69 | Michael Hanselmann | row.append(job.GetStatus()) |
474 | af30b2fd | Michael Hanselmann | elif fname == "ops": |
475 | af30b2fd | Michael Hanselmann | row.append([op.GetInput().__getstate__() for op in job._ops]) |
476 | af30b2fd | Michael Hanselmann | elif fname == "opresult": |
477 | 307149a8 | Iustin Pop | row.append([op.GetResult() for op in job._ops]) |
478 | af30b2fd | Michael Hanselmann | elif fname == "opstatus": |
479 | af30b2fd | Michael Hanselmann | row.append([op.GetStatus() for op in job._ops]) |
480 | e2715f69 | Michael Hanselmann | else:
|
481 | e2715f69 | Michael Hanselmann | raise errors.OpExecError("Invalid job query field '%s'" % fname) |
482 | e2715f69 | Michael Hanselmann | return row
|
483 | e2715f69 | Michael Hanselmann | |
484 | e2715f69 | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
485 | e2715f69 | Michael Hanselmann | """Returns a list of jobs in queue.
|
486 | e2715f69 | Michael Hanselmann |
|
487 | e2715f69 | Michael Hanselmann | Args:
|
488 | e2715f69 | Michael Hanselmann | - job_ids: Sequence of job identifiers or None for all
|
489 | e2715f69 | Michael Hanselmann | - fields: Names of fields to return
|
490 | e2715f69 | Michael Hanselmann |
|
491 | e2715f69 | Michael Hanselmann | """
|
492 | e2715f69 | Michael Hanselmann | self._lock.acquire()
|
493 | e2715f69 | Michael Hanselmann | try:
|
494 | e2715f69 | Michael Hanselmann | jobs = [] |
495 | e2715f69 | Michael Hanselmann | |
496 | f1da30e6 | Michael Hanselmann | for job in self._jobs.GetJobs(job_ids): |
497 | e2715f69 | Michael Hanselmann | if job is None: |
498 | e2715f69 | Michael Hanselmann | jobs.append(None)
|
499 | e2715f69 | Michael Hanselmann | else:
|
500 | e2715f69 | Michael Hanselmann | jobs.append(self._GetJobInfo(job, fields))
|
501 | e2715f69 | Michael Hanselmann | |
502 | e2715f69 | Michael Hanselmann | return jobs
|
503 | e2715f69 | Michael Hanselmann | finally:
|
504 | e2715f69 | Michael Hanselmann | self._lock.release()
|
505 | e2715f69 | Michael Hanselmann | |
506 | f1da30e6 | Michael Hanselmann | @utils.LockedMethod
|
507 | e2715f69 | Michael Hanselmann | def Shutdown(self): |
508 | e2715f69 | Michael Hanselmann | """Stops the job queue.
|
509 | e2715f69 | Michael Hanselmann |
|
510 | e2715f69 | Michael Hanselmann | """
|
511 | e2715f69 | Michael Hanselmann | self._wpool.TerminateWorkers()
|
512 | f1da30e6 | Michael Hanselmann | self._jobs.Close() |