Synnefo

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from functools import wraps

from django.db import transaction

#from django.conf import settings

from synnefo.api import util

from snf_django.lib.api import faults

from synnefo.db.models import NetworkInterface

from synnefo.logic import backend

from logging import getLogger

log = getLogger(__name__)

def port_command(action):

    def decorator(func):

        @wraps(func)

        @transaction.commit_on_success()

        def wrapper(port, *args, **kwargs):

            return func(port, *args, **kwargs)

        return wrapper

    return decorator

@transaction.commit_on_success

def create(network, machine, ipaddress, name="", security_groups=None,

           device_owner='vm'):

    """Create a new port connecting a server/router to a network.

    Connect a server/router to a network by creating a new Port. If

    'ipaddress' argument is specified, the port will be assigned this

    IPAddress. Otherwise, an IPv4 address from the IPv4 subnet will be

    allocated.

    """

    if network.state != 'ACTIVE':

        raise faults.Conflict('Network build in process')

    user_id = machine.userid

    if ipaddress is None:

        if network.subnets.filter(ipversion=4).exists():

            ipaddress = util.allocate_ip(network, user_id)

    else:

        if ipaddress.nic is not None:

            raise faults.BadRequest("Address '%s' already in use." %

                                    ipaddress.address)

    #create the port

    port = NetworkInterface.objects.create(name=name,

                                           network=network,

                                           machine=machine,

                                           userid=user_id,

                                           device_owner=device_owner,

                                           state="BUILDING")

    #add the security groups if any

    if security_groups:

        port.security_groups.add(*security_groups)

    # If no IPAddress is specified, try to allocate one

    if ipaddress is None and network.subnets.filter(ipversion=4).exists():

        ipaddress = util.allocate_ip(network, user_id)

    # Associate the IPAddress with the NIC

    if ipaddress is not None:

        ipaddress.nic = port

        ipaddress.save()

    jobID = backend.connect_to_network(machine, port)

    log.info("Created Port %s with IP Address: %s. Job: %s",

             port, ipaddress, jobID)

    # TODO: Consider quotas for Ports

    # TODO: Associate jobID with the port

    return port

@transaction.commit_on_success

def delete(port):

    """Delete a port by removing the NIC card the instance.

    Send a Job to remove the NIC card from the instance. The port

    will be deleted and the associated IPv4 addressess will be released

    when the job completes successfully.

    """

    jobID = backend.disconnect_from_network(port.machine, port)

    log.info("Removing port %s, Job: %s", port, jobID)

    return port