Exception handling when file-not-found
Added rudimentary exception handling for when yaml_fs encounters
a node/class for which no file exists.
Unfortunately, there is no way to properly communicate that to Ansible
when it invokes the adapter. Oh well.
Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/errors.py b/errors.py
new file mode 100644
index 0000000..dfb07b3
--- /dev/null
+++ b/errors.py
@@ -0,0 +1,53 @@
+#
+# -*- coding: utf-8 -*-
+#
+# This file is part of reclass (http://github.com/madduck/reclass)
+#
+# Copyright © 2007–13 martin f. krafft <madduck@madduck.net>
+# Released under the terms of the Artistic Licence 2.0
+#
+
+import posix
+
+class ReclassException(Exception):
+
+ def __init__(self, rc=posix.EX_SOFTWARE, *args):
+ super(ReclassException, self).__init__(*args)
+ self._rc = rc
+
+ def __str__(self):
+ return "reclass encountered an exception, sorry!"
+
+ message = property(lambda self: self.__str__())
+ rc = property(lambda self: self._rc)
+
+
+class NotFoundError(ReclassException):
+
+ def __init__(self, rc=posix.EX_IOERR):
+ super(NotFoundError, self).__init__(rc)
+
+
+class NodeNotFound(NotFoundError):
+
+ def __init__(self, storage, classname, uri):
+ super(NodeNotFound, self).__init__()
+ self._storage = storage
+ self._name = classname
+ self._uri = uri
+
+ def __str__(self):
+ return "Node '{0}' not found under {1}://{2}".format(self._name,
+ self._storage,
+ self._uri)
+
+
+class ClassNotFound(NodeNotFound):
+
+ def __init__(self, storage, classname, uri, nodename):
+ super(ClassNotFound, self).__init__(storage, classname, uri)
+ self._nodename = nodename
+
+ def __str__(self):
+ return "Class '{0}' (in ancestry of node {1}) not found under {2}://{3}" \
+ .format(self._name, self._nodename, self._storage, self._uri)