add list_holdings quotaholder api call

list_holdings() to be used to get all holdings for multiple resources
without having to call list_resources/get_holding for each entity/holding.

snf-common/synnefo/lib/quotaholder/api/quotaholder.py

@@ -195,6 +195,18 @@ class QuotaholderAPI(Specificator):
         resources = ListOf(Resource)
         return resources
 
+    def list_holdings   (
+                self,
+                context         =   Context,
+                list_holdings   =   ListOf(Entity, Key)
+        ):
+
+        rejected = ListOf(Entity)
+        holdings_list = ListOf(ListOf(Entity, Resource,
+                                      Imported, Exported,
+                                      Returned, Released))
+        return Tuple(holdings_list, rejected)
+
     def get_quota   (
                 self,
                 context     =   Context,

snf-quotaholder-app/quotaholder_django/quotaholder_app/callpoint.py

@@ -393,6 +393,28 @@ class QuotaholderDjangoDBCallpoint(Callpoint):
         resources = [h.resource for h in holdings]
         return resources
 
+    def list_holdings(self, context={}, list_holdings=()):
+        rejected = []
+        reject = rejected.append
+        holdings_list = []
+        append = holdings_list.append
+
+        for entity, key in list_holdings:
+            try:
+                e = Entity.objects.get(entity=entity)
+                if e.key != key:
+                    raise Entity.DoesNotExist("wrong key")
+            except Entity.DoesNotExist:
+                reject(entity)
+                continue
+
+            holdings = e.holding_set.filter(entity=entity)
+            append([[entity, h.resource,
+                     h.imported, h.exported, h.returned, h.released]
+                        for h in holdings])
+
+        return holdings_list, rejected
+
     def get_quota(self, context={}, get_quota=()):
         quotas = []
         append = quotas.append

snf-quotaholder-app/quotaholder_django/test/simpletests.py

@@ -232,6 +232,40 @@ class QHAPITest(QHTestCase):
                                      name='something',
                                      provisions=[(e1, resource, 1)])
 
+    def test_010_list_holdings(self):
+        e0, k0 = ('list_holdings_one', '1')
+        e1, k1 = ('list_holdings_two', '1')
+        resource = 'list_holdings_resource'
+        sys = 'system'
+
+        r = self.qh.create_entity(create_entity=[(e0, sys, k0, ''),
+                                                 (e1, sys, k1, '')])
+        if r:
+            raise AssertionError("cannot create entities")
+
+        self.qh.set_quota(set_quota=[(sys, resource, '', 10, 0, None, None, 0),
+                                     (e0, resource, k0, 0, 10, None, None, 0),
+                                     (e1, resource, k1, 0, 10, None, None, 0)])
+
+        s0 = self.qh.issue_commission(clientkey=self.client, target=e0, key=k0,
+                                      name='a commission',
+                                      provisions=[('system', resource, 3)])
+
+        s1 = self.qh.issue_commission(clientkey=self.client, target=e1, key=k1,
+                                      name='a commission',
+                                      provisions=[('system', resource, 4)])
+
+        self.qh.accept_commission(clientkey=self.client, serials=[s0, s1])
+
+        holdings_list, rejected = self.qh.list_holdings(list_holdings=[
+                                                        (e0, k0),
+                                                        (e1, k1),
+                                                        (e0+e1, k0+k1)])
+
+        self.assertEqual(rejected, [e0+e1])
+        self.assertEqual(holdings_list, [[(e0, resource, 3, 0, 0, 0)],
+                                         [(e1, resource, 4, 0, 0, 0)]])
+
 
     def test_010_pending_commissions(self):
         r = self.qh.get_pending_commissions(clientkey=self.client)