Factorize member_id in the base coordinator class

Any coordinator that implements (and they all should) group membership
needs a member_id field and copy it to self. Just do that by default for
all driver at __init__ time.

Change-Id: I66d82815afd4c6e9354212e5ab3fba17931c1bbc

tooz/coordination.py

@@ -231,8 +231,9 @@ class CoordinationDriver(object):
     enum member(s) that can be used to interogate how this driver works.
     """
 
-    def __init__(self):
+    def __init__(self, member_id):
         super(CoordinationDriver, self).__init__()
+        self._member_id = member_id
         self._started = False
         self._hooks_join_group = collections.defaultdict(Hooks)
         self._hooks_leave_group = collections.defaultdict(Hooks)
@@ -610,8 +611,8 @@ class CoordinationDriverCachedRunWatchers(CoordinationDriver):
 
     """
 
-    def __init__(self):
-        super(CoordinationDriverCachedRunWatchers, self).__init__()
+    def __init__(self, member_id):
+        super(CoordinationDriverCachedRunWatchers, self).__init__(member_id)
         # A cache for group members
         self._group_members = collections.defaultdict(set)
         self._joined_groups = set()

tooz/drivers/consul.py

@@ -107,7 +107,7 @@ class ConsulDriver(coordination.CoordinationDriver):
     DEFAULT_PORT = 8500
 
     def __init__(self, member_id, parsed_url, options):
-        super(ConsulDriver, self).__init__()
+        super(ConsulDriver, self).__init__(member_id)
         options = utils.collapse(options)
         self._executor = utils.ProxyExecutor.build("Consul", options)
         self._host = parsed_url.hostname

tooz/drivers/etcd.py

@@ -200,7 +200,7 @@ class EtcdDriver(coordination.CoordinationDriver):
     lock_encoder_cls = utils.Base64LockEncoder
 
     def __init__(self, member_id, parsed_url, options):
-        super(EtcdDriver, self).__init__()
+        super(EtcdDriver, self).__init__(member_id)
         host = parsed_url.hostname or self.DEFAULT_HOST
         port = parsed_url.port or self.DEFAULT_PORT
         options = utils.collapse(options)

tooz/drivers/file.py

@@ -205,8 +205,7 @@ class FileDriver(coordination.CoordinationDriverCachedRunWatchers):
 
     def __init__(self, member_id, parsed_url, options):
         """Initialize the file driver."""
-        super(FileDriver, self).__init__()
-        self._member_id = member_id
+        super(FileDriver, self).__init__(member_id)
         self._dir = self._normalize_path(parsed_url.path)
         self._executor = utils.ProxyExecutor.build("File", options)
         self._group_dir = os.path.join(self._dir, 'groups')

tooz/drivers/ipc.py

@@ -166,7 +166,7 @@ class IPCDriver(coordination.CoordinationDriver):
 
     def __init__(self, member_id, parsed_url, options):
         """Initialize the IPC driver."""
-        super(IPCDriver, self).__init__()
+        super(IPCDriver, self).__init__(member_id)
         self._executor = utils.ProxyExecutor.build("IPC", options)
 
     def _start(self):

tooz/drivers/memcached.py

@@ -216,10 +216,9 @@ class MemcachedDriver(coordination.CoordinationDriverCachedRunWatchers):
     STILL_ALIVE = b"It's alive!"
 
     def __init__(self, member_id, parsed_url, options):
-        super(MemcachedDriver, self).__init__()
+        super(MemcachedDriver, self).__init__(member_id)
         options = utils.collapse(options)
         self._options = options
-        self._member_id = member_id
         self._executor = utils.ProxyExecutor.build("Memcached", options)
         self.host = (parsed_url.hostname or "localhost",
                      parsed_url.port or 11211)

tooz/drivers/mysql.py

@@ -117,7 +117,7 @@ class MySQLDriver(coordination.CoordinationDriver):
 
     def __init__(self, member_id, parsed_url, options):
         """Initialize the MySQL driver."""
-        super(MySQLDriver, self).__init__()
+        super(MySQLDriver, self).__init__(member_id)
         self._parsed_url = parsed_url
         self._options = utils.collapse(options)
 

tooz/drivers/pgsql.py

@@ -173,7 +173,7 @@ class PostgresDriver(coordination.CoordinationDriver):
 
     def __init__(self, member_id, parsed_url, options):
         """Initialize the PostgreSQL driver."""
-        super(PostgresDriver, self).__init__()
+        super(PostgresDriver, self).__init__(member_id)
         self._parsed_url = parsed_url
         self._options = utils.collapse(options)
 

tooz/drivers/redis.py

@@ -315,7 +315,7 @@ return 1
     """
 
     def __init__(self, member_id, parsed_url, options):
-        super(RedisDriver, self).__init__()
+        super(RedisDriver, self).__init__(member_id)
         options = utils.collapse(options, exclude=self.CLIENT_LIST_ARGS)
         self._parsed_url = parsed_url
         self._options = options
@@ -332,7 +332,6 @@ return 1
         self._beat_prefix = self._namespace + b"_beats"
         self._groups = self._namespace + b"_groups"
         self._client = None
-        self._member_id = utils.to_binary(member_id, encoding=self._encoding)
         self._acquired_locks = set()
         self._executor = utils.ProxyExecutor.build("Redis", options)
         self._started = False

tooz/drivers/zookeeper.py

@@ -135,9 +135,8 @@ class KazooDriver(coordination.CoordinationDriverCachedRunWatchers):
     """
 
     def __init__(self, member_id, parsed_url, options):
-        super(KazooDriver, self).__init__()
+        super(KazooDriver, self).__init__(member_id)
         options = utils.collapse(options, exclude=['hosts'])
-        self._member_id = member_id
         self.timeout = int(options.get('timeout', '10'))
         self._namespace = options.get('namespace', self.TOOZ_NAMESPACE)
         self._coord = self._make_client(parsed_url, options)