Synnefo

# Copyright 2012 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 GRNET S.A. ``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 GRNET S.A 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.

from django.core.management.base import BaseCommand, CommandError

from optparse import make_option

from util import pool_table_from_type, pool_map_chunks

from synnefo.db.pools import bitarray_to_map

POOL_CHOICES = ['bridge', 'mac-prefix']

class Command(BaseCommand):

    args = "<pool ID>"

    help = "Show a pool"

    output_transaction = True

    option_list = BaseCommand.option_list + (

        make_option('--type', dest='type',

                    choices=POOL_CHOICES,

                    help="Type of pool"

                    ),

    )

    def handle(self, *args, **options):

        type_ = options['type']

        if not type_:

            raise CommandError("Type of pool is mandatory")

        pool_table = pool_table_from_type(type_)

        try:

            pool_id = int(args[0])

            pool_row = pool_table.objects.get(id=pool_id)

        except (ValueError, pool_table.DoesNotExist):

            raise CommandError("Invalid pool ID")

        pool = pool_row.pool

        kv = {

            'id': pool_row.id,

            'offset': pool_row.offset,

            'base': pool_row.base,

            'size': pool_row.size,

            'available': pool.count_available(),

            'reserved': pool.count_reserved(),

        }

        for key, val in sorted(kv.items()):

            line = '%s: %s\n' % (key.rjust(16), val)

            self.stdout.write(line.encode('utf8'))

        step = (type_ == 'bridge') and 64 or 80

        print_map('Pool', pool.to_map(), step, self.stdout)

        print_map('Reserved', bitarray_to_map(pool.reserved[:pool_row.size]),

                  step, self.stdout)

def print_map(name, pool_map, step, out):

    sep = '*' * 80

    out.write(sep + "\n")

    out.write("%s: \n" % name)

    out.write(sep + "\n")

    count = 0

    for chunk in pool_map_chunks(pool_map, step):

        chunk_len = len(chunk)

        out.write(("%s " % count).rjust(4))

        out.write((chunk + " %d\n") % (count + chunk_len - 1))

        count += chunk_len