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- from __future__ import absolute_import
-
- import datetime
-
- from sqlalchemy import (Column, Integer, String, Text, DateTime,
- Sequence, Boolean, ForeignKey, SmallInteger)
- from sqlalchemy.orm import relation
- from sqlalchemy.ext.declarative import declarative_base, declared_attr
- from sqlalchemy.schema import MetaData
-
- class_registry = {}
- metadata = MetaData()
- ModelBase = declarative_base(metadata=metadata, class_registry=class_registry)
-
-
- class Queue(object):
- __table_args__ = {'sqlite_autoincrement': True, 'mysql_engine': 'InnoDB'}
-
- id = Column(Integer, Sequence('queue_id_sequence'), primary_key=True,
- autoincrement=True)
- name = Column(String(200), unique=True)
-
- def __init__(self, name):
- self.name = name
-
- def __str__(self):
- return '<Queue({self.name})>'.format(self=self)
-
- @declared_attr
- def messages(cls):
- return relation('Message', backref='queue', lazy='noload')
-
-
- class Message(object):
- __table_args__ = {'sqlite_autoincrement': True, 'mysql_engine': 'InnoDB'}
-
- id = Column(Integer, Sequence('message_id_sequence'),
- primary_key=True, autoincrement=True)
- visible = Column(Boolean, default=True, index=True)
- sent_at = Column('timestamp', DateTime, nullable=True, index=True,
- onupdate=datetime.datetime.now)
- payload = Column(Text, nullable=False)
- version = Column(SmallInteger, nullable=False, default=1)
-
- __mapper_args__ = {'version_id_col': version}
-
- def __init__(self, payload, queue):
- self.payload = payload
- self.queue = queue
-
- def __str__(self):
- return '<Message: {0.sent_at} {0.payload} {0.queue_id}>'.format(self)
-
- @declared_attr
- def queue_id(self):
- return Column(
- Integer,
- ForeignKey(
- '%s.id' % class_registry['Queue'].__tablename__,
- name='FK_kombu_message_queue'
- )
- )
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