Synnefo

# Copyright 2011 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

#   1. Redistributions of source code must retain the above copyright

#      notice, this list of conditions and the following disclaimer.

#

#  2. Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in the

#     documentation and/or other materials provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

# SUCH DAMAGE.

#

# The views and conclusions contained in the software and documentation are

# those of the authors and should not be interpreted as representing official

# policies, either expressed or implied, of GRNET S.A.

# Methods for sending email

import json

from django.core.mail import send_mail

from django.conf import settings

import amqp_connection

from synnefo.logic import log

_logger = log.get_logger("synnefo.logic")

_prefix = settings.BACKEND_PREFIX_ID.split('-')[0]

def send_async(frm = settings.DEFAULT_FROM_EMAIL,

               to = None, subject = None, body = None):

    """

        Queue a message to be sent sometime later

        by a worker process.

    """

    msg = dict()

    msg['frm'] = frm

    msg['to'] = to

    msg['subject'] = subject

    msg['body'] = body

    routekey = "logic.%s.email.outgoing" % _prefix

    amqp_connection.send(json.dumps(msg), settings.EXCHANGE_API, routekey)

def send (sender = settings.DEFAULT_FROM_EMAIL,

          recipient = None, subject = None, body = None):

    attempts = 0

    while attempts < 3:

        try:

            send_mail(subject, body, sender, [recipient])

            return True

        except Exception as e:

            _logger.exception("Error sending email")

        finally:

            attempts += 1

    _logger.warn("Failed all %d attempts to send email, aborting", attempts)

    return False