root / snf-astakos-app / astakos / quotaholder / callpoint.py @ 61660c26
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# Copyright 2012, 2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from functools import partial |
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from astakos.quotaholder.exception import ( |
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QuotaholderError, |
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NoCommissionError, |
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CorruptedError, InvalidDataError, |
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NoHoldingError, |
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DuplicateError) |
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from astakos.quotaholder.commission import ( |
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Import, Release, Operations) |
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from astakos.quotaholder.utils.newname import newname |
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from astakos.quotaholder.api import QH_PRACTICALLY_INFINITE |
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from .models import (Holding, |
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Commission, Provision, ProvisionLog, |
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now, |
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db_get_holding, |
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db_get_commission, db_filter_provision) |
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class QuotaholderDjangoDBCallpoint(object): |
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def get_holder_quota(self, holders=None, sources=None, resources=None): |
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holdings = Holding.objects.filter(holder__in=holders) |
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if sources is not None: |
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holdings = holdings.filter(source__in=sources) |
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if resources is not None: |
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holdings = holdings.filter(resource__in=resources) |
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quotas = {} |
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for holding in holdings: |
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key = (holding.holder, holding.source, holding.resource) |
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value = (holding.limit, holding.imported_min, holding.imported_max) |
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quotas[key] = value |
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return quotas
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def _get_holdings_for_update(self, holding_keys): |
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holding_keys = sorted(holding_keys)
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holdings = {} |
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for (holder, source, resource) in holding_keys: |
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try:
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h = Holding.objects.get_for_update( |
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holder=holder, source=source, resource=resource) |
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holdings[(holder, source, resource)] = h |
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except Holding.DoesNotExist:
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pass
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return holdings
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def _provisions_to_list(self, provisions): |
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lst = [] |
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for provision in provisions: |
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try:
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holder = provision['holder']
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source = provision['source']
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resource = provision['resource']
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quantity = provision['quantity']
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key = (holder, source, resource) |
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lst.append((key, quantity)) |
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except KeyError: |
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raise InvalidDataError("Malformed provision") |
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return lst
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def _mkProvision(self, key, quantity): |
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holder, source, resource = key |
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return {'holder': holder, |
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'source': source,
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'resource': resource,
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'quantity': quantity,
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} |
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def set_holder_quota(self, quotas): |
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q = self._level_quota_dict(quotas)
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self.set_quota(q)
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def _level_quota_dict(self, quotas): |
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lst = [] |
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for holder, holder_quota in quotas.iteritems(): |
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for source, source_quota in holder_quota.iteritems(): |
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for resource, limit in source_quota.iteritems(): |
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key = (holder, source, resource) |
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lst.append((key, limit)) |
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return lst
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def set_quota(self, quotas): |
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holding_keys = [key for (key, limit) in quotas] |
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holdings = self._get_holdings_for_update(holding_keys)
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for key, limit in quotas: |
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try:
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h = holdings[key] |
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except KeyError: |
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holder, source, resource = key |
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h = Holding(holder=holder, |
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source=source, |
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resource=resource) |
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h.limit = limit |
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h.save() |
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holdings[key] = h |
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def issue_commission(self, |
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context=None,
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clientkey=None,
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name=None,
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force=False,
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provisions=()): |
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if name is None: |
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name = ""
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create = Commission.objects.create |
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commission = create(clientkey=clientkey, name=name) |
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serial = commission.serial |
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operations = Operations() |
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provisions = self._provisions_to_list(provisions)
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keys = [key for (key, value) in provisions] |
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holdings = self._get_holdings_for_update(keys)
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try:
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checked = [] |
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for key, quantity in provisions: |
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if not isinstance(quantity, (int, long)): |
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raise InvalidDataError("Malformed provision") |
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if key in checked: |
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m = "Duplicate provision for %s" % str(key) |
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provision = self._mkProvision(key, quantity)
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raise DuplicateError(m,
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provision=provision) |
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checked.append(key) |
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# Target
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try:
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th = holdings[key] |
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except KeyError: |
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m = ("There is no such holding %s" % key)
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provision = self._mkProvision(key, quantity)
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raise NoHoldingError(m,
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provision=provision) |
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if quantity >= 0: |
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operations.prepare(Import, th, quantity, force) |
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else: # release |
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abs_quantity = -quantity |
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operations.prepare(Release, th, abs_quantity, force) |
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holdings[key] = th |
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Provision.objects.create(serial=commission, |
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holding=th, |
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quantity=quantity) |
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except QuotaholderError:
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operations.revert() |
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raise
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return serial
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def _log_provision(self, |
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commission, provision, log_time, reason): |
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holding = provision.holding |
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kwargs = { |
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'serial': commission.serial,
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'name': commission.name,
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'holder': holding.holder,
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'source': holding.source,
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'resource': holding.resource,
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'limit': holding.limit,
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'imported_min': holding.imported_min,
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'imported_max': holding.imported_max,
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'delta_quantity': provision.quantity,
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'issue_time': commission.issue_time,
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'log_time': log_time,
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'reason': reason,
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} |
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ProvisionLog.objects.create(**kwargs) |
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def accept_commission(self, |
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context=None, clientkey=None, |
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serial=None, reason=''): |
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log_time = now() |
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try:
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c = db_get_commission(clientkey=clientkey, serial=serial, |
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for_update=True)
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except Commission.DoesNotExist:
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return False |
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operations = Operations() |
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provisions = db_filter_provision(serial=serial, for_update=True)
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for pv in provisions: |
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try:
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th = db_get_holding(id=pv.holding_id, |
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for_update=True)
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except Holding.DoesNotExist:
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m = "Corrupted provision"
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raise CorruptedError(m)
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quantity = pv.quantity |
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if quantity >= 0: |
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operations.finalize(Import, th, quantity) |
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else: # release |
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abs_quantity = -quantity |
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operations.finalize(Release, th, abs_quantity) |
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reason = 'ACCEPT:' + reason[-121:] |
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self._log_provision(c, pv, log_time, reason)
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pv.delete() |
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c.delete() |
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return True |
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def reject_commission(self, |
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context=None, clientkey=None, |
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serial=None, reason=''): |
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log_time = now() |
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try:
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c = db_get_commission(clientkey=clientkey, serial=serial, |
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for_update=True)
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except Commission.DoesNotExist:
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return False |
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operations = Operations() |
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provisions = db_filter_provision(serial=serial, for_update=True)
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for pv in provisions: |
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try:
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th = db_get_holding(id=pv.holding_id, |
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for_update=True)
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except Holding.DoesNotExist:
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m = "Corrupted provision"
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raise CorruptedError(m)
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quantity = pv.quantity |
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if quantity >= 0: |
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operations.undo(Import, th, quantity) |
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else: # release |
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abs_quantity = -quantity |
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operations.undo(Release, th, abs_quantity) |
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reason = 'REJECT:' + reason[-121:] |
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self._log_provision(c, pv, log_time, reason)
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pv.delete() |
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c.delete() |
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return True |
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def get_pending_commissions(self, context=None, clientkey=None): |
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pending = Commission.objects.filter(clientkey=clientkey) |
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pending_list = pending.values_list('serial', flat=True) |
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return list(pending_list) |
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def get_commission(self, clientkey=None, serial=None): |
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try:
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commission = Commission.objects.get(clientkey=clientkey, |
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serial=serial) |
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except Commission.DoesNotExist:
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raise NoCommissionError(serial)
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objs = Provision.objects.select_related('holding')
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provisions = objs.filter(serial=commission) |
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ps = [p.todict() for p in provisions] |
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response = {'serial': serial,
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'provisions': ps,
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'issue_time': commission.issue_time,
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} |
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return response
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def _resolve(self, include, exclude, operation): |
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done = [] |
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failed = [] |
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for serial in include: |
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if serial in exclude: |
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failed.append((serial, 'CONFLICT'))
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else:
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response = operation(serial=serial) |
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if response:
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done.append(serial) |
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else:
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failed.append((serial, 'NOTFOUND'))
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return done, failed
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def resolve_pending_commissions(self, |
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context=None, clientkey=None, |
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accept_set=[], reject_set=[]): |
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accept_set = set(accept_set)
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reject_set = set(reject_set)
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accept = partial(self.accept_commission, clientkey=clientkey)
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reject = partial(self.reject_commission, clientkey=clientkey)
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accepted, failed_ac = self._resolve(accept_set, reject_set, accept)
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rejected, failed_re = self._resolve(reject_set, accept_set, reject)
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failed = list(set(failed_ac + failed_re)) |
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return accepted, rejected, failed
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API_Callpoint = QuotaholderDjangoDBCallpoint |