예제 #1
0
    def attempt(self):
        """
        Try to perform this payment.
        """
        self.last_attempted_at = datetime.now()
        # Write attempted date now so if something happens we can see this
        # payment was interrupted.
        self.save()
        changed_accounts = []
        try:
            flow_graph = FlowGraph(self.payer, self.recipient)
            flow_links = flow_graph.min_cost_flow(self.amount)
            with transaction.atomic(using='ripple'):
                for creditline_id, amount in flow_links:
                    creditline = CreditLine.objects.get(pk=creditline_id)
                    Entry.objects.create_entry(self, creditline.account,
                                               -amount * creditline.bal_mult,
                                               creditline.limit)
                    changed_accounts.append(creditline.account)
                self.status = 'completed'
                self.save()
        except BaseException as exc:

            # TODO: Handle collisions better here so we can retry or give the
            # user an informative error message, rather than the server error page.

            self.status = 'failed'
            self.save()
            if not isinstance(exc, PaymentError):
                raise

        # Update cached graphs.
        for account in changed_accounts:
            for creditline in (account.pos_creditline, account.neg_creditline):
                update_creditline_in_cached_graphs(creditline)
예제 #2
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    def attempt(self):
        """
        Try to perform this payment.
        """
        self.last_attempted_at = datetime.now()
        # Write attempted date now so if something happens we can see this
        # payment was interrupted.
        self.save()
        changed_accounts = []
        try:
            flow_graph = FlowGraph(self.payer, self.recipient)
            flow_links = flow_graph.min_cost_flow(self.amount)
            with transaction.commit_on_success(using="ripple"):
                for creditline_id, amount in flow_links:
                    creditline = CreditLine.objects.get(pk=creditline_id)
                    Entry.objects.create_entry(
                        self, creditline.account, -amount * creditline.bal_mult, creditline.limit
                    )
                    changed_accounts.append(creditline.account)
                self.status = "completed"
                self.save()
        except BaseException as exc:

            # TODO: Handle collisions better here so we can retry or give the
            # user an informative error message, rather than the server error page.

            self.status = "failed"
            self.save()
            if not isinstance(exc, PaymentError):
                raise

        # Update cached graphs.
        for account in changed_accounts:
            for creditline in (account.pos_creditline, account.neg_creditline):
                update_creditline_in_cached_graphs(creditline)
예제 #3
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    def post_delete(cls, sender, instance, **kwargs):
        # Delete partner creditline and account itself.
        instance.account.delete()

        # Remove from cached flow graph.
        from cc.payment import flow

        # TODO: Call from single external process -- not threadsafe!
        
        flow.update_creditline_in_cached_graphs(instance)
예제 #4
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    def post_delete(cls, sender, instance, **kwargs):
        # Delete partner creditline and account itself.
        instance.account.delete()

        # Remove from cached flow graph.
        from cc.payment import flow

        # TODO: Call from single external process -- not threadsafe!

        flow.update_creditline_in_cached_graphs(instance)
예제 #5
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파일: models.py 프로젝트: us1415/villagescc
    def post_save(cls, sender, instance, created, **kwargs):
        if created:
            # Newly-created creditlines may not have a partner yet,
            # so updating them will blow up.  Update new creditlines
            # manually.
            return

        from cc.payment import flow

        # TODO: Call from single external process -- not threadsafe!

        flow.update_creditline_in_cached_graphs(instance)
예제 #6
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    def post_save(cls, sender, instance, created, **kwargs):
        if created:
            # Newly-created creditlines may not have a partner yet,
            # so updating them will blow up.  Update new creditlines
            # manually.
            return

        from cc.payment import flow

        # TODO: Call from single external process -- not threadsafe!
        
        flow.update_creditline_in_cached_graphs(instance)
예제 #7
0
파일: models.py 프로젝트: us1415/villagescc
    def post_delete(cls, sender, instance, **kwargs):
        # Delete partner creditline and account itself.
        try:
            instance.account.delete()
        except Account.DoesNotExist:
            pass

        # Remove from cached flow graph.
        from cc.payment import flow

        # TODO: Call from single external process -- not threadsafe!

        # XXX: This is broken - tries to load partner creditline, which
        #      may already be (is?) deleted.
        flow.update_creditline_in_cached_graphs(instance)
예제 #8
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    def create_account(self, node1, node2):
        """
        Create account between two nodes.
        Also creates the required CreditLine records.
        """
        acct = self.create()
        pos_cl = CreditLine.objects.create(account=acct, node=node1, bal_mult=1)
        neg_cl = CreditLine.objects.create(account=acct, node=node2, bal_mult=-1)

        # Manually update new creditlines in cached graphs.
        from cc.payment import flow

        flow.update_creditline_in_cached_graphs(pos_cl)
        flow.update_creditline_in_cached_graphs(neg_cl)
        return acct
예제 #9
0
    def post_delete(cls, sender, instance, **kwargs):
        # Delete partner creditline and account itself.
        try:
            instance.account.delete()
        except Account.DoesNotExist:
            pass

        # Remove from cached flow graph.
        from cc.payment import flow

        # TODO: Call from single external process -- not threadsafe!

        # XXX: This is broken - tries to load partner creditline, which
        #      may already be (is?) deleted.
        flow.update_creditline_in_cached_graphs(instance)
예제 #10
0
파일: models.py 프로젝트: us1415/villagescc
    def create_account(self, node1, node2):
        """
        Create account between two nodes.
        Also creates the required CreditLine records.
        """
        acct = self.create()
        pos_cl = CreditLine.objects.create(
            account=acct, node=node1, bal_mult=1)
        neg_cl = CreditLine.objects.create(
            account=acct, node=node2, bal_mult=-1)

        # Manually update new creditlines in cached graphs.
        from cc.payment import flow
        flow.update_creditline_in_cached_graphs(pos_cl)
        flow.update_creditline_in_cached_graphs(neg_cl)
        return acct