From 4b317c9f5a9033afaa7435e11f761de4bc3095a3 Mon Sep 17 00:00:00 2001
From: drebs <drebs@leap.se>
Date: Tue, 18 Nov 2014 15:33:23 -0200
Subject: Fix interruptable sync.

---
 client/src/leap/soledad/client/target.py | 34 ++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

(limited to 'client')

diff --git a/client/src/leap/soledad/client/target.py b/client/src/leap/soledad/client/target.py
index 9b546402..ba61cdff 100644
--- a/client/src/leap/soledad/client/target.py
+++ b/client/src/leap/soledad/client/target.py
@@ -348,7 +348,7 @@ class DocumentSyncerPool(object):
                 self._threads.remove(syncer_thread)
             self._semaphore_pool.release()
 
-    def cancel_threads(self, calling_thread):
+    def cancel_threads(self):
         """
         Stop all threads in the pool.
         """
@@ -794,6 +794,7 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
         self._sync_exchange_lock = threading.Lock()
         self.source_replica_uid = source_replica_uid
         self._defer_decryption = False
+        self._syncer_pool = None
 
         # deferred decryption attributes
         self._sync_db = None
@@ -952,7 +953,7 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
 
     def _get_remote_docs(self, url, last_known_generation, last_known_trans_id,
                          headers, return_doc_cb, ensure_callback, sync_id,
-                         syncer_pool, defer_decryption=False):
+                         defer_decryption=False):
         """
         Fetch sync documents from the remote database and insert them in the
         local database.
@@ -1013,7 +1014,7 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
                 break
 
             # launch a thread to fetch one document from target
-            t = syncer_pool.new_syncer_thread(
+            t = self._syncer_pool.new_syncer_thread(
                 idx, number_of_changes,
                 last_callback_lock=last_callback_lock)
 
@@ -1047,6 +1048,8 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
                 t.join()
                 if t.success:
                     number_of_changes, _, _ = t.result
+                else:
+                    raise t.exception
                 first_request = False
 
         # make sure all threads finished and we have up-to-date info
@@ -1057,6 +1060,8 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             t.join()
             if t.success:
                 last_successful_thread = t
+            else:
+                raise t.exception
 
         # get information about last successful thread
         if last_successful_thread is not None:
@@ -1162,9 +1167,9 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
         logger.debug("Soledad sync send status: %s" % msg)
 
         defer_encryption = self._sync_db is not None
-        syncer_pool = DocumentSyncerPool(
+        self._syncer_pool = DocumentSyncerPool(
             self._raw_url, self._raw_creds, url, headers, ensure_callback,
-            self.stop)
+            self.stop_syncer)
         threads = []
         last_callback_lock = None
         sent = 0
@@ -1209,7 +1214,7 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             # -------------------------------------------------------------
             # end of symmetric encryption
             # -------------------------------------------------------------
-            t = syncer_pool.new_syncer_thread(
+            t = self._syncer_pool.new_syncer_thread(
                 sent + 1, total, last_request_lock=last_request_lock,
                 last_callback_lock=last_callback_lock)
 
@@ -1264,6 +1269,8 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             if t.success:
                 synced.append((doc.doc_id, doc.rev))
                 last_successful_thread = t
+            else:
+                raise t.exception
 
         # delete documents from the sync database
         if defer_encryption:
@@ -1282,10 +1289,10 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             cur_target_gen, cur_target_trans_id = self._get_remote_docs(
                 url,
                 last_known_generation, last_known_trans_id, headers,
-                return_doc_cb, ensure_callback, sync_id, syncer_pool,
+                return_doc_cb, ensure_callback, sync_id,
                 defer_decryption=defer_decryption)
 
-        syncer_pool.cleanup()
+        self._syncer_pool.cleanup()
 
         # decrypt docs in case of deferred decryption
         if defer_decryption:
@@ -1303,6 +1310,7 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             cur_target_trans_id = trans_id_after_send
 
         self.stop()
+        self._syncer_pool = None
         return cur_target_gen, cur_target_trans_id
 
     def start(self):
@@ -1312,6 +1320,11 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
         with self._stop_lock:
             self._stopped = False
 
+
+    def stop_syncer(self):
+        with self._stop_lock:
+            self._stopped = True
+
     def stop(self):
         """
         Mark current sync session as stopped.
@@ -1320,8 +1333,9 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
         enough information to the synchronizer so the sync session can be
         recovered afterwards.
         """
-        with self._stop_lock:
-            self._stopped = True
+        self.stop_syncer()
+        if self._syncer_pool:
+            self._syncer_pool.cancel_threads()
 
     @property
     def stopped(self):
-- 
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