# -*- coding: utf-8 -*-
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from django.db import models
[docs]class SemaforoError(Exception):
"""Representa um erro ocorrido durante acesso à tabelas relacionadas com semaforo."""
def __init__(self, cause, message=None):
self.cause = cause
self.message = message
def __str__(self):
msg = u'Causa: %s, Mensagem: %s' % (self.cause, self.message)
return msg.encode('utf-8', 'replace')
[docs]class Semaforo(models.Model):
id = models.AutoField(primary_key=True, db_column='id_semaforo')
descricao = models.CharField(max_length=50)
log = logging.getLogger('Semaforo')
CRIAR_IP_ID = 1
ALOCAR_VLAN_ID = 2
PROVISIONAR_GRUPO_VIRTUAL_ID = 3
class Meta:
db_table = u'semaforo'
managed = False
[docs] @classmethod
def lock(cls, id):
try:
semaforo = Semaforo.objects.get(pk=id)
semaforo.descricao = semaforo.descricao
semaforo.save()
except Exception, e:
cls.log.error(
u'Falha ao realizar o lock para o identificador %s.' % id)
raise SemaforoError(
e, u'Falha ao realizar o lock para o identificador %s.' % id)