Finish appservice txn storage impl and tests.

synapse/storage/appservice.py

@@ -429,15 +429,7 @@ class ApplicationServiceTransactionStore(SQLBaseStore):
         # The highest id may be the last one sent (in which case it is last_txn)
         # or it may be the highest in the txns list (which are waiting to be/are
         # being sent)
-        result = txn.execute(
-            "SELECT last_txn FROM application_services_state WHERE as_id=?",
-            (service.id,)
-        )
-        last_txn_id = result.fetchone()
-        if last_txn_id is None:  # no row exists
-            last_txn_id = 0
-        else:
-            last_txn_id = int(last_txn_id[0])  # select 'last_txn' col
+        last_txn_id = self._get_last_txn(txn, service.id)
 
         result = txn.execute(
             "SELECT MAX(txn_id) FROM application_services_txns WHERE as_id=?",
@@ -467,12 +459,43 @@ class ApplicationServiceTransactionStore(SQLBaseStore):
             service(ApplicationService): The application service which was sent
             this transaction.
         Returns:
-            A Deferred which resolves to True if this transaction was completed
+            A Deferred which resolves if this transaction was stored
             successfully.
         """
-        # TODO: Set current txn_id for AS to 'txn_id'
-        # TODO: Delete txn contents
-        pass
+        return self.runInteraction(
+            "complete_appservice_txn",
+            self._complete_appservice_txn,
+            txn_id, service
+        )
+
+    def _complete_appservice_txn(self, txn, txn_id, service):
+        txn_id = int(txn_id)
+
+        # Debugging query: Make sure the txn being completed is EXACTLY +1 from
+        # what was there before. If it isn't, we've got problems (e.g. the AS
+        # has probably missed some events), so whine loudly but still continue,
+        # since it shouldn't fail completion of the transaction.
+        last_txn_id = self._get_last_txn(txn, service.id)
+        if (last_txn_id + 1) != txn_id:
+            logger.error(
+                "appservice: Completing a transaction which has an ID > 1 from "
+                "the last ID sent to this AS. We've either dropped events or "
+                "sent it to the AS out of order. FIX ME. last_txn=%s "
+                "completing_txn=%s service_id=%s", last_txn_id, txn_id,
+                service.id
+            )
+
+        # Set current txn_id for AS to 'txn_id'
+        self._simple_upsert_txn(
+            txn, "application_services_state", dict(as_id=service.id),
+            dict(last_txn=txn_id)
+        )
+
+        # Delete txn contents
+        self._simple_delete_txn(
+            txn, "application_services_txns",
+            dict(txn_id=txn_id, as_id=service.id)
+        )
 
     def get_oldest_unsent_txn(self, service):
         """Get the oldest transaction which has not been sent for this
@@ -484,6 +507,38 @@ class ApplicationServiceTransactionStore(SQLBaseStore):
             A Deferred which resolves to an AppServiceTransaction or
             None.
         """
-        # TODO: Monotonically increasing txn ids, so just select the smallest
+        return self.runInteraction(
+            "get_oldest_unsent_appservice_txn",
+            self._get_oldest_unsent_txn,
+            service
+        )
+
+    def _get_oldest_unsent_txn(self, txn, service):
+        # Monotonically increasing txn ids, so just select the smallest
         # one in the txns table (we delete them when they are sent)
-        pass
+        result = txn.execute(
+            "SELECT *,MIN(txn_id) FROM application_services_txns WHERE as_id=?",
+            (service.id,)
+        )
+        entry = self.cursor_to_dict(result)[0]
+
+        if not entry or entry["txn_id"] is None:
+            # the min(txn_id) part will force a row, so entry may not be None
+            return None
+
+        return AppServiceTransaction(
+            service=service, id=entry["txn_id"], events=json.loads(
+                entry["content"]
+            )
+        )
+
+    def _get_last_txn(self, txn, service_id):
+        result = txn.execute(
+            "SELECT last_txn FROM application_services_state WHERE as_id=?",
+            (service_id,)
+        )
+        last_txn_id = result.fetchone()
+        if last_txn_id is None:  # no row exists
+            return 0
+        else:
+            return int(last_txn_id[0])  # select 'last_txn' col