Isolating backtraces to DEBUG (bug 947060)

Debug mode on: http://pastie.org/3529520
  (full backtrace to stdout)

Debug mode off: http://pastie.org/3529526
  (Just an error message to stdout)

Change-Id: I1d4e17cf73e7777c3cbaef7c5d7fd18a4f6e53dc

1 files changed, 18 insertions, 0 deletions

diff --git a/keystone/common/logging.py b/keystone/common/logging.py
index 0d3f4693..77d6a8e1 100644
--- a/keystone/common/logging.py
+++ b/keystone/common/logging.py
@@ -8,6 +8,7 @@ import functools
 import logging
 import logging.config
 import pprint
+import traceback
 
 from logging.handlers import SysLogHandler
 from logging.handlers import WatchedFileHandler
@@ -55,3 +56,20 @@ def log_debug(f):
         logging.debug('')
         return rv
     return wrapper
+
+
+def fail_gracefully(f):
+    """Logs exceptions and aborts."""
+    @functools.wraps(f)
+    def wrapper(*args, **kw):
+        try:
+            return f(*args, **kw)
+        except Exception as e:
+            # tracebacks are kept in the debug log
+            logging.debug(traceback.format_exc(e))
+
+            # exception message is printed to all logs
+            logging.critical(e)
+
+            exit(1)
+    return wrapper