Python 2.1 compatibility.

src/ZEO/ClientStorage.py

@@ -214,7 +214,7 @@ class ClientStorage:
         # _is_read_only stores the constructor argument
         self._is_read_only = read_only
         # _conn_is_read_only stores the status of the current connection
-        self._conn_is_read_only = False
+        self._conn_is_read_only = 0
         self._storage = storage
         self._read_only_fallback = read_only_fallback
         # _server_addr is used by sortKey()
@@ -367,7 +367,7 @@ class ClientStorage:
         """
         log2(INFO, "Testing connection %r" % conn)
         # XXX Check the protocol version here?
-        self._conn_is_read_only = False
+        self._conn_is_read_only = 0
         stub = self.StorageServerStubClass(conn)
         try:
             stub.register(str(self._storage), self._is_read_only)
@@ -377,7 +377,7 @@ class ClientStorage:
                 raise
             log2(INFO, "Got ReadOnlyError; trying again with read_only=1")
             stub.register(str(self._storage), read_only=1)
-            self._conn_is_read_only = True
+            self._conn_is_read_only = 1
             return 0
 
     def notifyConnected(self, conn):
@@ -559,7 +559,7 @@ class ClientStorage:
     def isReadOnly(self):
         """Storage API: return whether we are in read-only mode."""
         if self._is_read_only:
-            return True
+            return 1
         else:
             # If the client is configured for a read-write connection
             # but has a read-only fallback connection, _conn_is_read_only
@@ -961,12 +961,18 @@ class ClientStorage:
     end = endVerify
     Invalidate = invalidateTrans
 
+try:
+    StopIteration
+except NameError:
+    class StopIteration(Exception):
+        pass
+
 class InvalidationLogIterator:
     """Helper class for reading invalidations in endVerify."""
-    # XXX will require extra work to backport to Python 2.1
 
     def __init__(self, fileobj):
         self._unpickler = cPickle.Unpickler(fileobj)
+        self.getitem_i = 0
 
     def __iter__(self):
         return self
@@ -976,3 +982,15 @@ class InvalidationLogIterator:
         if oid is None:
             raise StopIteration
         return oid, version
+
+    # The __getitem__() method is needed to support iteration
+    # in Python 2.1.
+
+    def __getitem__(self, i):
+        assert i == self.getitem_i
+        try:
+            obj = self.next()
+        except StopIteration:
+            raise IndexError, i
+        self.getitem_i += 1
+        return obj

src/ZEO/tests/ConnectionTests.py

@@ -438,6 +438,7 @@ class ConnectionTests(CommonSetupTearDown):
         self._storage = self.openClientStorage()
         self._dostore()
 
+        
     # Test case for multiple storages participating in a single
     # transaction.  This is not really a connection test, but it needs
     # about the same infrastructure (several storage servers).
@@ -491,8 +492,12 @@ class ConnectionTests(CommonSetupTearDown):
         get_transaction().commit()
 
         # make sure the invalidation is received in the other client
+        for i in range(10):
             c1._storage.sync()
-        self.assert_(r1._p_oid in c1._invalidated)
+            if c1._invalidated.has_key(r1._p_oid):
+                break
+            time.sleep(0.1)
+        self.assert_(c1._invalidated.has_key(r1._p_oid))
 
         # force the invalidations to be applied...
         c1.setLocalTransaction()

src/ZODB/Connection.py

@@ -13,7 +13,10 @@
 ##############################################################################
 """Database connection support
 
-$Id: Connection.py,v 1.88 2003/04/08 15:55:44 jeremy Exp $"""
+$Id: Connection.py,v 1.89 2003/04/22 18:04:37 jeremy Exp $"""
+
+from __future__ import nested_scopes
+
 from cPickleCache import PickleCache
 from POSException import ConflictError, ReadConflictError, TransactionError
 from ExtensionClass import Base

src/ZODB/DB.py

@@ -13,8 +13,8 @@
 ##############################################################################
 """Database objects
 
-$Id: DB.py,v 1.48 2003/04/08 15:55:44 jeremy Exp $"""
-__version__='$Revision: 1.48 $'[11:-2]
+$Id: DB.py,v 1.49 2003/04/22 18:04:37 jeremy Exp $"""
+__version__='$Revision: 1.49 $'[11:-2]
 
 import cPickle, cStringIO, sys, POSException, UndoLogCompatible
 from Connection import Connection
@@ -301,7 +301,7 @@ class DB(UndoLogCompatible.UndoLogCompatible):
             version=connection._version
         # Update modified in version cache
         # XXX must make this work with list or dict to backport to 2.6
-        for oid in oids:
+        for oid in oids.keys():
             h=hash(oid)%131
             o=self._miv_cache.get(h, None)
             if o is not None and o[0]==oid: del self._miv_cache[h]

src/ZODB/tests/testZODB.py

@@ -26,12 +26,12 @@ class P(Persistent):
 class Independent(Persistent):
 
     def _p_independent(self):
-        return True
+        return 1
 
 class DecoyIndependent(Persistent):
 
     def _p_independent(self):
-        return False
+        return 0
 
 class ZODBTests(unittest.TestCase):
 
@@ -193,7 +193,7 @@ class ZODBTests(unittest.TestCase):
         self.obj = P()
         self.readConflict()
 
-    def readConflict(self, shouldFail=True):
+    def readConflict(self, shouldFail=1):
         # Two transactions run concurrently.  Each reads some object,
         # then one commits and the other tries to read an object
         # modified by the first.  This read should fail with a conflict
@@ -237,10 +237,10 @@ class ZODBTests(unittest.TestCase):
         root["real_data"] = real_data = PersistentDict()
         root["index"] = index = PersistentDict()
 
-        real_data["a"] = PersistentDict({"indexed_value": False})
-        real_data["b"] = PersistentDict({"indexed_value": True})
-        index[True] = PersistentDict({"b": 1})
-        index[False] = PersistentDict({"a": 1})
+        real_data["a"] = PersistentDict({"indexed_value": 0})
+        real_data["b"] = PersistentDict({"indexed_value": 1})
+        index[1] = PersistentDict({"b": 1})
+        index[0] = PersistentDict({"a": 1})
         get_transaction().commit()
 
         # load some objects from one connection
@@ -251,8 +251,8 @@ class ZODBTests(unittest.TestCase):
         index2 = r2["index"]
 
         real_data["b"]["indexed_value"] = False
-        del index[True]["b"]
-        index[False]["b"] = 1
+        del index[1]["b"]
+        index[0]["b"] = 1
         cn2.getTransaction().commit()
 
         del real_data2["a"]
@@ -269,8 +269,8 @@ class ZODBTests(unittest.TestCase):
 
         # index2 values not ready to commit
         self.assert_(not index2._p_changed)
-        self.assert_(not index2[False]._p_changed)
-        self.assert_(not index2[True]._p_changed)
+        self.assert_(not index2[0]._p_changed)
+        self.assert_(not index2[1]._p_changed)
 
         self.assertRaises(ConflictError, get_transaction().commit)
         get_transaction().abort()