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# Copyright 2011 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Job classes related to QuestionJob."""
__metaclass__ = type
__all__ = [
'QuestionJob',
]
import simplejson
from storm.expr import (
And,
)
from storm.locals import (
Int,
Reference,
Unicode,
)
from zope.component import getUtility
from zope.interface import (
classProvides,
implements,
)
from lazr.delegates import delegates
from canonical.database.enumcol import EnumCol
from canonical.launchpad.interfaces.lpstorm import (
IMasterStore,
)
from canonical.launchpad.scripts import log
from lp.answers.enums import QuestionJobType
from lp.answers.interfaces.questionjob import (
IQuestionJob,
IQuestionEmailJob,
IQuestionEmailJobSource,
)
from lp.answers.model.question import Question
from lp.registry.interfaces.person import IPersonSet
from lp.services.database.stormbase import StormBase
from lp.services.job.model.job import Job
from lp.services.job.runner import BaseRunnableJob
from lp.services.propertycache import cachedproperty
class QuestionJob(StormBase):
"""A Job for queued question emails."""
implements(IQuestionJob)
__storm_table__ = 'QuestionJob'
id = Int(primary=True)
job_id = Int(name='job')
job = Reference(job_id, Job.id)
job_type = EnumCol(enum=QuestionJobType, notNull=True)
question_id = Int(name='question')
question = Reference(question_id, Question.id)
_json_data = Unicode('json_data')
def __init__(self, question, job_type, metadata):
"""Constructor.
:param question: The question related to this job.
:param job_type: The specific job being performed for the question.
:param metadata: The type-specific variables, as a JSON-compatible
dict.
"""
super(QuestionJob, self).__init__()
self.job = Job()
self.job_type = job_type
self.question = question
json_data = simplejson.dumps(metadata)
self._json_data = json_data.decode('utf-8')
def __repr__(self):
return (
"<{self.__class__.__name__} for question {self.question.id}; "
"status={self.job.status}>").format(self=self)
@property
def metadata(self):
"""See `IQuestionJob`."""
return simplejson.loads(self._json_data)
class QuestionEmailJob(BaseRunnableJob):
"""Intermediate class for deriving from QuestionJob."""
delegates(IQuestionJob)
implements(IQuestionEmailJob)
classProvides(IQuestionEmailJobSource)
def __init__(self, job):
self.context = job
class_job_type = QuestionJobType.EMAIL
@classmethod
def create(cls, question, user, subject, body, headers):
"""See `IQuestionJob`."""
metadata = {
'user': user.id,
'subject': subject,
'body': body,
'headers': headers,
}
job = QuestionJob(
question=question, job_type=cls.class_job_type, metadata=metadata)
return cls(job)
@classmethod
def iterReady(cls):
"""See `IJobSource`."""
store = IMasterStore(QuestionJob)
jobs = store.find(
QuestionJob,
And(QuestionJob.job_type == cls.class_job_type,
QuestionJob.job_id.is_in(Job.ready_jobs)))
return (cls(job) for job in jobs)
@cachedproperty
def user(self):
"""See `IQuestionEmailJob`."""
return getUtility(IPersonSet).get(self.metadata['user'])
@property
def subject(self):
"""See `IQuestionEmailJob`."""
return self.metadata['subject']
@property
def body(self):
"""See `IQuestionEmailJob`."""
return self.metadata['body']
@property
def headers(self):
"""See `IQuestionEmailJob`."""
return self.metadata['headers']
@property
def log_name(self):
"""See `IRunnableJob`."""
return self.__class__.__name__
def getOopsVars(self):
"""See `IRunnableJob`."""
vars = BaseRunnableJob.getOopsVars(self)
vars.extend([
('question', self.question.id),
('user', self.user.name),
])
return vars
def getErrorRecipients(self):
"""See `IRunnableJob`."""
return self.user
def run(self):
"""Send emails."""
log.debug(
"%s will send email for question %s.",
self.log_name, self.question.id)
# Extract and adapt QuestionNotification.send().
log.debug(
"%s has sent email for question %s.",
self.log_name, self.question.id)
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