1 files changed, 48 insertions, 15 deletions

diff --git a/synapse/storage/pusher.py b/synapse/storage/pusher.py
index 7693ab9082..29da3bbd13 100644
--- a/synapse/storage/pusher.py
+++ b/synapse/storage/pusher.py
@@ -16,8 +16,6 @@
 from ._base import SQLBaseStore
 from twisted.internet import defer
 
-from synapse.api.errors import StoreError
-
 from canonicaljson import encode_canonical_json
 
 import logging
@@ -79,12 +77,41 @@ class PusherStore(SQLBaseStore):
         rows = yield self.runInteraction("get_all_pushers", get_pushers)
         defer.returnValue(rows)
 
+    def get_pushers_stream_token(self):
+        return self._pushers_id_gen.get_max_token()
+
+    def get_all_updated_pushers(self, last_id, current_id, limit):
+        def get_all_updated_pushers_txn(txn):
+            sql = (
+                "SELECT id, user_name, access_token, profile_tag, kind,"
+                " app_id, app_display_name, device_display_name, pushkey, ts,"
+                " lang, data"
+                " FROM pushers"
+                " WHERE ? < id AND id <= ?"
+                " ORDER BY id ASC LIMIT ?"
+            )
+            txn.execute(sql, (last_id, current_id, limit))
+            updated = txn.fetchall()
+
+            sql = (
+                "SELECT stream_id, user_id, app_id, pushkey"
+                " FROM deleted_pushers"
+                " WHERE ? < stream_id AND stream_id <= ?"
+                " ORDER BY stream_id ASC LIMIT ?"
+            )
+            txn.execute(sql, (last_id, current_id, limit))
+            deleted = txn.fetchall()
+
+            return (updated, deleted)
+        return self.runInteraction(
+            "get_all_updated_pushers", get_all_updated_pushers_txn
+        )
+
     @defer.inlineCallbacks
     def add_pusher(self, user_id, access_token, kind, app_id,
                    app_display_name, device_display_name,
                    pushkey, pushkey_ts, lang, data, profile_tag=""):
-        try:
-            next_id = self._pushers_id_gen.get_next()
+        with self._pushers_id_gen.get_next() as stream_id:
             yield self._simple_upsert(
                 "pushers",
                 dict(
@@ -101,23 +128,29 @@ class PusherStore(SQLBaseStore):
                     lang=lang,
                     data=encode_canonical_json(data),
                     profile_tag=profile_tag,
-                ),
-                insertion_values=dict(
-                    id=next_id,
+                    id=stream_id,
                 ),
                 desc="add_pusher",
             )
-        except Exception as e:
-            logger.error("create_pusher with failed: %s", e)
-            raise StoreError(500, "Problem creating pusher.")
 
     @defer.inlineCallbacks
     def delete_pusher_by_app_id_pushkey_user_id(self, app_id, pushkey, user_id):
-        yield self._simple_delete_one(
-            "pushers",
-            {"app_id": app_id, "pushkey": pushkey, 'user_name': user_id},
-            desc="delete_pusher_by_app_id_pushkey_user_id",
-        )
+        def delete_pusher_txn(txn, stream_id):
+            self._simple_delete_one(
+                txn,
+                "pushers",
+                {"app_id": app_id, "pushkey": pushkey, "user_name": user_id}
+            )
+            self._simple_upsert_txn(
+                txn,
+                "deleted_pushers",
+                {"app_id": app_id, "pushkey": pushkey, "user_id": user_id},
+                {"stream_id", stream_id},
+            )
+        with self._pushers_id_gen.get_next() as stream_id:
+            yield self.runInteraction(
+                "delete_pusher", delete_pusher_txn, stream_id
+            )
 
     @defer.inlineCallbacks
     def update_pusher_last_token(self, app_id, pushkey, user_id, last_token):