Rename sleep to watch in a AbstractDCS

This method suppose to watch for changes of leader key if current node
is not leader and also it could watch for changes in a members list if
current conde is the leader.

helpers/dcs.py

@@ -153,5 +153,5 @@ class AbstractDCS:
         """Voluntarily remove leader key from DCS
         This method should remove leader key if current instance is the leader"""
 
-    def sleep(self, timeout):
+    def watch(self, timeout):
         sleep(timeout)

helpers/etcd.py

@@ -224,7 +224,7 @@ class Etcd(AbstractDCS):
     def delete_leader(self):
         return self.client.delete(self.client_path('/leader'), prevValue=self._name)
 
-    def sleep(self, timeout):
+    def watch(self, timeout):
         # watch on leader key changes if it is defined and current node is not lock owner
         if self.cluster and self.cluster.leader and self.cluster.leader.member.name != self._name:
             end_time = time.time() + timeout
@@ -244,4 +244,4 @@ class Etcd(AbstractDCS):
 
                 timeout = end_time - time.time()
 
-        timeout > 0 and super(Etcd, self).sleep(timeout)
+        timeout > 0 and super(Etcd, self).watch(timeout)

helpers/zookeeper.py

@@ -220,7 +220,7 @@ class ZooKeeper(AbstractDCS):
         if isinstance(self.leader, Leader) and self.leader.member.name == self._name:
             self.client.delete(self.client_path('/leader'))
 
-    def sleep(self, timeout):
+    def watch(self, timeout):
         self.cluster_event.wait(timeout)
         if self.cluster_event.isSet():
             self.fetch_cluster = True

tests/test_etcd.py

@@ -253,11 +253,11 @@ class TestEtcd(unittest.TestCase):
         self.etcd.client.delete = etcd_delete
         self.assertFalse(self.etcd.delete_leader())
 
-    def test_sleep(self):
+    def test_watch(self):
         self.etcd.client.watch = etcd_watch
-        self.etcd.sleep(100)
+        self.etcd.watch(100)
         self.etcd.get_cluster()
-        self.etcd.sleep(1)
-        self.etcd.sleep(5)
-        self.etcd.sleep(10)
-        self.etcd.sleep(100)
+        self.etcd.watch(1)
+        self.etcd.watch(5)
+        self.etcd.watch(10)
+        self.etcd.watch(100)

tests/test_zookeeper.py

@@ -164,5 +164,5 @@ class TestZooKeeper(unittest.TestCase):
         self.zk.last_leader_operation = -1
         self.assertTrue(self.zk.update_leader(MockPostgresql()))
 
-    def test_sleep(self):
-        self.zk.sleep(0)
+    def test_watch(self):
+        self.zk.watch(0)