Synnefo

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import pprint

from optparse import make_option

from django.core.management.base import CommandError

from synnefo.lib.amqp import AMQPClient

from snf_django.management.commands import SynnefoCommand

class Command(SynnefoCommand):

    args = "<queue name>"

    help = "Inspect the messages of a queue. Close all other clients in "\

           "order to be able to inspect unacknowledged messages."

    option_list = SynnefoCommand.option_list + (

        make_option('--no-requeue', action='store_false', dest='requeue',

                    default=True, help="Do not requeue the messages"),

        make_option('-i', '--interactive', action='store_true', default=False,

                    dest='interactive', help="Interactive mode")

    )

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

        if len(args) != 1:

            raise CommandError("Please provide a queue")

        queue = args[0]

        interactive = options['interactive']

        requeue = options['requeue']

        client = AMQPClient()

        client.connect()

        pp = pprint.PrettyPrinter(indent=4, width=4, stream=self.stdout)

        more_msgs = True

        counter = 0

        sep = '-' * 80

        while more_msgs:

            msg = client.basic_get(queue=queue)

            if msg:

                counter += 1

                self.stderr.write(sep)

                self.stderr.write('Message %d:' % counter)

                self.stderr.write(sep)

                pp.pprint(msg)

                if not requeue or interactive:

                    if interactive and not get_user_confirmation():

                        continue

                    # Acknowledging the message will remove it from the queue

                    client.basic_ack(msg)

            else:

                more_msgs = False

def get_user_confirmation():

    ans = raw_input("Do you want to delete this message (N/y):")

    if not ans:

        return False

    if ans not in ['Y', 'y']:

        return False

    return True