[CalendarServer-changes] [4410] CalendarServer/trunk/twext/python/log.py

[source_changes at macosforge.org]

Revision: 4410
          http://trac.macosforge.org/projects/calendarserver/changeset/4410
Author:   wsanchez at apple.com
Date:     2009-07-02 11:35:47 -0700 (Thu, 02 Jul 2009)
Log Message:
-----------
Add StandardIOObserver

Added Paths:
-----------
    CalendarServer/trunk/twext/python/log.py

Added: CalendarServer/trunk/twext/python/log.py
===================================================================
--- CalendarServer/trunk/twext/python/log.py	                        (rev 0)
+++ CalendarServer/trunk/twext/python/log.py	2009-07-02 18:35:47 UTC (rev 4410)
@@ -0,0 +1,49 @@
+##
+# Copyright (c) 2009 Apple Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+##
+
+"""
+Extensions to twisted.python.log.
+"""
+
+from sys import stdout, stderr
+
+from twisted.python.log import addObserver
+
+class StandardIOObserver (object):
+    """
+    Log observer that writes to standard I/O.
+    """
+    def emit(self, eventDict):
+        text = None
+
+        if eventDict["isError"]:
+            output = stderr
+            if "failure" in eventDict:
+                text = eventDict["failure"].getTraceback()
+        else:
+            output = stdout
+
+        if not text:
+            text = " ".join([str(m) for m in eventDict["message"]]) + "\n"
+
+        output.write(text)
+        output.flush()
+
+    def start(self):
+        addObserver(self.emit)
+
+    def stop(self):
+        removeObserver(self.emit)
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