From ba109986d55e008c7855d20538d84f2c69ca9271 Mon Sep 17 00:00:00 2001
From: drebs <drebs@leap.se>
Date: Thu, 3 Jul 2014 10:23:11 -0300
Subject: Properly stop sync and cancel threads on fail.

---
 client/src/leap/soledad/client/target.py | 46 ++++++++++----------------------
 1 file changed, 14 insertions(+), 32 deletions(-)

diff --git a/client/src/leap/soledad/client/target.py b/client/src/leap/soledad/client/target.py
index 28edd027..c459925d 100644
--- a/client/src/leap/soledad/client/target.py
+++ b/client/src/leap/soledad/client/target.py
@@ -246,7 +246,7 @@ class DocumentSyncerPool(object):
     """
 
     def __init__(self, raw_url, raw_creds, query_string, headers,
-            ensure_callback):
+            ensure_callback, stop_method):
         """
         Initialize the document syncer pool.
 
@@ -269,6 +269,7 @@ class DocumentSyncerPool(object):
         self._query_string = query_string
         self._headers = headers
         self._ensure_callback = ensure_callback
+        self._stop_method = stop_method
         # pool attributes
         self._failures = False
         self._semaphore_pool = threading.BoundedSemaphore(
@@ -356,9 +357,11 @@ class DocumentSyncerPool(object):
         """
         Stop all threads in the pool.
         """
+        # stop sync
+        self._stop_method()
         stopped = []
         # stop all threads
-        logger.warning("Soledad sync: cancelling sync threads.")
+        logger.warning("Soledad sync: cancelling sync threads...")
         with self._pool_access_lock:
             self._failures = True
             while self._threads:
@@ -373,8 +376,7 @@ class DocumentSyncerPool(object):
             t.request_lock.release()
             t.callback_lock.acquire(False)  # just in case
             t.callback_lock.release()
-            if t is not calling_thread and t.is_alive():
-                t.join()
+        logger.warning("Soledad sync: cancelled sync threads.")
 
     def cleanup(self):
         """
@@ -414,9 +416,6 @@ class HTTPDocumentSyncer(HTTPClientBase, TokenBasedAuth):
         self._request_method = None
         self._success_callback = None
         self._failure_callback = None
-        # storage of info returned by the request
-        self._success = None
-        self._exception = None
 
     def _reset(self):
         """
@@ -426,8 +425,6 @@ class HTTPDocumentSyncer(HTTPClientBase, TokenBasedAuth):
         self._success_callback = None
         self._failure_callback = None
         self._request_method = None
-        self._success = None
-        self._exception = None
 
     def set_request_method(self, method, *args, **kwargs):
         """
@@ -994,12 +991,6 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             if self.stopped is True:
                 break
 
-            # bail out if any thread failed
-            if syncer_pool.failures is True:
-                #syncer_pool.cancel_threads()
-                self.stop()
-                break
-
             # launch a thread to fetch one document from target
             t = syncer_pool.new_syncer_thread(
                 idx, number_of_changes,
@@ -1037,9 +1028,6 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
                     number_of_changes, _, _ = t.result
                 first_request = False
 
-        if syncer_pool.failures is True:
-            self.stop()
-
         # make sure all threads finished and we have up-to-date info
         last_successful_thread = None
         while threads:
@@ -1142,7 +1130,8 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
 
         defer_encryption = self._sync_db is not None
         syncer_pool = DocumentSyncerPool(
-            self._raw_url, self._raw_creds, url, headers, ensure_callback)
+            self._raw_url, self._raw_creds, url, headers, ensure_callback,
+            self.stop)
         threads = []
         last_request_lock = None
         last_callback_lock = None
@@ -1157,11 +1146,6 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             if self.stopped is True:
                 break
 
-            # bail out if any thread failed
-            if syncer_pool.failures is True:
-                self.stop()
-                break
-
             # skip non-syncable docs
             if isinstance(doc, SoledadDocument) and not doc.syncable:
                 continue
@@ -1236,9 +1220,6 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
         # make sure all threads finished and we have up-to-date info
         while threads:
             # check if there are failures
-            if syncer_pool.failures is True:
-                #syncer_pool.cancel_threads()
-                self.stop()
             t, doc = threads.pop(0)
             t.join()
             if t.success:
@@ -1248,11 +1229,12 @@ class SoledadSyncTarget(HTTPSyncTarget, TokenBasedAuth):
             self._sync_watcher.start()
 
         # get docs from target
-        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,
-            defer_decryption=defer_decryption)
+        if self.stopped is False:
+            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,
+                defer_decryption=defer_decryption)
 
         # delete documents from the sync database
         if defer_encryption:
-- 
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