--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/roundup/backends/sessions_common.py	Sun Aug 07 01:51:11 2022 -0400
@@ -0,0 +1,50 @@
+import base64, logging
+
+import roundup.anypy.random_ as random_
+from roundup.anypy.strings import b2s
+
+logger = logging.getLogger('roundup.hyperdb.backend.sessions')
+if not random_.is_weak:
+    logger.debug("Importing good random generator")
+else:
+    logger.warning("**SystemRandom not available. Using poor random generator")
+
+
+class SessionCommon:
+
+    def log_debug(self, msg, *args, **kwargs):
+        """Log a message with level DEBUG."""
+
+        logger = self.get_logger()
+        logger.debug(msg, *args, **kwargs)
+
+    def log_info(self, msg, *args, **kwargs):
+        """Log a message with level INFO."""
+
+        logger = self.get_logger()
+        logger.info(msg, *args, **kwargs)
+
+    def log_warning(self, msg, *args, **kwargs):
+        """Log a message with level INFO."""
+        logger = self.get_logger()
+        logger.warning(msg, *args, **kwargs)
+
+    def get_logger(self):
+        """Return the logger for this database."""
+
+        # Because getting a logger requires acquiring a lock, we want
+        # to do it only once.
+        if not hasattr(self, '__logger'):
+            self.__logger = logging.getLogger('roundup.hyperdb.backends.%s' %
+                                              self.name or "basicdb" )
+
+        return self.__logger
+
+    def getUniqueKey(self, length=40):
+        otk = b2s(base64.b64encode(
+            random_.token_bytes(length))).rstrip('=')
+        while self.exists(otk):
+            otk = b2s(base64.b64encode(
+                random_.token_bytes(length))).rstrip('=')
+
+        return otk