Synnefo

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import logging

from django import http

from django.utils import simplejson as json

from synnefo.db.models import VirtualMachine, Network

from django.db.models import Count, Sum

from snf_django.lib import api

from copy import copy

log = logging.getLogger(__name__)

@api.api_method(http_method='GET', user_required=False, token_required=False,

                logger=log, serializations=['json'])

@api.allow_jsonp()

def get_stats(request):

    stats = get_statistics()

    data = json.dumps(stats)

    return http.HttpResponse(data, status=200, content_type='application/json')

def get_statistics():

    # VirtualMachines

    vm_objects = VirtualMachine.objects

    servers = vm_objects.values("deleted", "operstate")\

                        .annotate(count=Count("id"),

                                  cpu=Sum("flavor__cpu"),

                                  ram=Sum("flavor__ram"),

                                  disk=Sum("flavor__disk"))

    zero_stats = {"count": 0, "cpu": 0, "ram": 0, "disk": 0}

    server_stats = {}

    for state in VirtualMachine.RSAPI_STATE_FROM_OPER_STATE.values():

        server_stats[state] = copy(zero_stats)

    for stats in servers:

        deleted = stats.pop("deleted")

        operstate = stats.pop("operstate")

        state = VirtualMachine.RSAPI_STATE_FROM_OPER_STATE.get(operstate)

        if deleted:

            for key in zero_stats.keys():

                server_stats["DELETED"][key] += stats.get(key, 0)

        elif state:

            for key in zero_stats.keys():

                server_stats[state][key] += stats.get(key, 0)

    #Networks

    net_objects = Network.objects

    networks = net_objects.values("deleted", "state")\

                          .annotate(count=Count("id"))

    zero_stats = {"count": 0}

    network_stats = {}

    for state in Network.RSAPI_STATE_FROM_OPER_STATE.values():

        network_stats[state] = copy(zero_stats)

    for stats in networks:

        deleted = stats.pop("deleted")

        state = stats.pop("state")

        state = Network.RSAPI_STATE_FROM_OPER_STATE.get(state)

        if deleted:

            for key in zero_stats.keys():

                network_stats["DELETED"][key] += stats.get(key, 0)

        elif state:

            for key in zero_stats.keys():

                network_stats[state][key] += stats.get(key, 0)

    statistics = {"servers": server_stats,

                  "networks": network_stats}

    return statistics