Synnefo

# -*- coding: utf-8 -

#

# Copyright 2013 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.

import ConfigParser

class WorkerGlue(object):

    pmap = {}

    worker_id = None

    ioctx_pool = None

    ArchipelagoConfFile = '/etc/archipelago/archipelago.conf'

    @classmethod

    def setmap(cls, pid, index):

        WorkerGlue.pmap[pid] = index

        WorkerGlue.worker_id = index

    @classmethod

    def setupXsegPool(cls, ObjectPool, Segment, Xseg_ctx,

                      cfile=ArchipelagoConfFile, pool_size=8):

        worker_id = WorkerGlue.worker_id

        WorkerGlue.ArchipelagoConfFile = ARCHIPELAGO_CONF_FILE = cfile

        ARCHIPELAGO_SEGMENT_TYPE = 'segdev'

        ARCHIPELAGO_SEGMENT_NAME = 'xsegbd'

        cfg = {}

        bcfg = ConfigParser.ConfigParser()

        bcfg.readfp(open(ARCHIPELAGO_CONF_FILE))

        cfg['SEGMENT_PORTS'] = bcfg.getint('XSEG', 'SEGMENT_PORTS')

        cfg['SEGMENT_DYNPORTS'] = bcfg.getint('XSEG', 'SEGMENT_DYNPORTS')

        cfg['SEGMENT_SIZE'] = bcfg.getint('XSEG', 'SEGMENT_SIZE')

        ARCHIPELAGO_SEGMENT_DYNPORTS = int(cfg['SEGMENT_DYNPORTS'])

        ARCHIPELAGO_SEGMENT_PORTS = int(cfg['SEGMENT_PORTS'])

        ARCHIPELAGO_SEGMENT_SIZE = int(cfg['SEGMENT_SIZE'])

        ARCHIPELAGO_SEGMENT_ALIGNMENT = 12

        class XsegPool(ObjectPool):

            def __init__(self):

                super(XsegPool, self).__init__(size=pool_size)

                self.segment = Segment(ARCHIPELAGO_SEGMENT_TYPE,

                                       ARCHIPELAGO_SEGMENT_NAME,

                                       ARCHIPELAGO_SEGMENT_DYNPORTS,

                                       ARCHIPELAGO_SEGMENT_PORTS,

                                       ARCHIPELAGO_SEGMENT_SIZE,

                                       ARCHIPELAGO_SEGMENT_ALIGNMENT)

                self.worker_id = worker_id

                self.cnt = 1

            def _pool_create(self):

                if self.worker_id == 1:

                    ioctx = Xseg_ctx(self.segment, self.worker_id + self.cnt)

                    self.cnt += 1

                    return ioctx

                elif self.worker_id > 1:

                    ioctx = Xseg_ctx(self.segment,

                                     (self.worker_id - 1) * pool_size + 2 +

                                     self.cnt)

                    self.cnt += 1

                    return ioctx

                elif self.worker_id is None:

                    ioctx = Xseg_ctx(self.segment, 200)

                    return ioctx

            def _pool_verify(self, poolobj):

                return True

            def _pool_cleanup(self, poolobj):

                return False

        WorkerGlue.ioctx_pool = XsegPool()