Fix bsddb.db.DBError derived exceptions so they can be unpickled.

(backport of trunk commit 43729)

diff --git a/Lib/bsddb/test/test_all.py b/Lib/bsddb/test/test_all.py
index 23dba0c098e600176c59d3d9b09c4e3f29625b5c..39cb4abd0e686638d3244c0ffff97b23a60e1577 100644 (file)
--- a/Lib/bsddb/test/test_all.py
+++ b/Lib/bsddb/test/test_all.py
@@ -64,6 +64,7 @@ def suite():
         'test_join',
         'test_lock',
         'test_misc',
+        'test_pickle',
         'test_queue',
         'test_recno',
         'test_thread',

diff --git a/Lib/bsddb/test/test_pickle.py b/Lib/bsddb/test/test_pickle.py
new file mode 100644 (file)
index 0000000..3916e5c
--- /dev/null
+++ b/Lib/bsddb/test/test_pickle.py
@@ -0,0 +1,75 @@
+
+import sys, os, string
+import pickle
+try:
+    import cPickle
+except ImportError:
+    cPickle = None
+import unittest
+import glob
+
+try:
+    # For Pythons w/distutils pybsddb
+    from bsddb3 import db
+except ImportError, e:
+    # For Python 2.3
+    from bsddb import db
+
+
+#----------------------------------------------------------------------
+
+class pickleTestCase(unittest.TestCase):
+    """Verify that DBError can be pickled and unpickled"""
+    db_home = 'db_home'
+    db_name = 'test-dbobj.db'
+
+    def setUp(self):
+        homeDir = os.path.join(os.path.dirname(sys.argv[0]), 'db_home')
+        self.homeDir = homeDir
+        try: os.mkdir(homeDir)
+        except os.error: pass
+
+    def tearDown(self):
+        if hasattr(self, 'db'):
+            del self.db
+        if hasattr(self, 'env'):
+            del self.env
+        files = glob.glob(os.path.join(self.homeDir, '*'))
+        for file in files:
+            os.remove(file)
+
+    def _base_test_pickle_DBError(self, pickle):
+        self.env = db.DBEnv()
+        self.env.open(self.homeDir, db.DB_CREATE | db.DB_INIT_MPOOL)
+        self.db = db.DB(self.env)
+        self.db.open(self.db_name, db.DB_HASH, db.DB_CREATE)
+        self.db.put('spam', 'eggs')
+        assert self.db['spam'] == 'eggs'
+        try:
+            self.db.put('spam', 'ham', flags=db.DB_NOOVERWRITE)
+        except db.DBError, egg:
+            pickledEgg = pickle.dumps(egg)
+            #print repr(pickledEgg)
+            rottenEgg = pickle.loads(pickledEgg)
+            if rottenEgg.args != egg.args or type(rottenEgg) != type(egg):
+                raise Exception, (rottenEgg, '!=', egg)
+        else:
+            raise Exception, "where's my DBError exception?!?"
+
+        self.db.close()
+        self.env.close()
+
+    def test01_pickle_DBError(self):
+        self._base_test_pickle_DBError(pickle=pickle)
+
+    if cPickle:
+        def test02_cPickle_DBError(self):
+            self._base_test_pickle_DBError(pickle=cPickle)
+
+#----------------------------------------------------------------------
+
+def test_suite():
+    return unittest.makeSuite(pickleTestCase)
+
+if __name__ == '__main__':
+    unittest.main(defaultTest='test_suite')

diff --git a/Misc/NEWS b/Misc/NEWS
index f42986853a7b71b17482db412bf63affa5ad8743..cf63a7dd78e071c569fc433b4d0d397ccaa98bf4 100644 (file)
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -15,6 +15,8 @@ Core and builtins
 Extension Modules
 -----------------
 
+- Fix bsddb.db.DBError derived exceptions so they can be unpickled.
+
 Library
 -------
 

diff --git a/Modules/_bsddb.c b/Modules/_bsddb.c
index de072b07af7985c1253a6054e200f30b23b1bdb1..e146b495003440ad7643de997ce7e717ca9b272b 100644 (file)
--- a/Modules/_bsddb.c
+++ b/Modules/_bsddb.c
@@ -97,7 +97,7 @@
 #error "eek! DBVER can't handle minor versions > 9"
 #endif
 
-#define PY_BSDDB_VERSION "4.3.0.1"
+#define PY_BSDDB_VERSION "4.3.0.2"
 static char *rcs_id = "$Id$";
 
 
@@ -5128,9 +5128,21 @@ DL_EXPORT(void) init_bsddb(void)
     ADD_INT(d, DB_SET_TXN_TIMEOUT);
 #endif
 
+    /* The exception name must be correct for pickled exception *
+     * objects to unpickle properly.                            */
+#ifdef PYBSDDB_STANDALONE  /* different value needed for standalone pybsddb */
+#define PYBSDDB_EXCEPTION_BASE  "bsddb3.db."
+#else
+#define PYBSDDB_EXCEPTION_BASE  "bsddb.db."
+#endif
+
+    /* All the rest of the exceptions derive only from DBError */
+#define MAKE_EX(name)   name = PyErr_NewException(PYBSDDB_EXCEPTION_BASE #name, DBError, NULL); \
+                        PyDict_SetItemString(d, #name, name)
+
     /* The base exception class is DBError */
-    DBError = PyErr_NewException("bsddb._db.DBError", NULL, NULL);
-    PyDict_SetItemString(d, "DBError", DBError);
+    DBError = NULL;     /* used in MAKE_EX so that it derives from nothing */
+    MAKE_EX(DBError);
 
     /* Some magic to make DBNotFoundError derive from both DBError and
        KeyError, since the API only supports using one base class. */
@@ -5141,10 +5153,6 @@ DL_EXPORT(void) init_bsddb(void)
     PyDict_DelItemString(d, "KeyError");
 
 
-    /* All the rest of the exceptions derive only from DBError */
-#define MAKE_EX(name)   name = PyErr_NewException("bsddb._db." #name, DBError, NULL); \
-                        PyDict_SetItemString(d, #name, name)
-
 #if !INCOMPLETE_IS_WARNING
     MAKE_EX(DBIncompleteError);
 #endif