Synnefo

# -*- coding: utf-8 -

#

# Copyright 2013 GRNET S.A. All rights reserved.

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import re

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 = open(ARCHIPELAGO_CONF_FILE).read()

        cfg['SEGMENT_PORTS'] = re.search('SEGMENT_PORTS\s*=\s*\d+',

                                         bcfg).group(0).split('=')[1]

        cfg['SEGMENT_SIZE'] = re.search('SEGMENT_SIZE\s*=\s*\d+',

                                        bcfg).group(0).split('=')[1]

        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_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()