initial dht libs

* glusterfile.py - helper for gluster client and backend files.
* glusterdir.py - helper for gluster client and backend dirs.
* brickdir.py - helper for collection and hashing of brickdirs (from pathinfo data).
* layout.py - base class for simple DHT layout validation.
* dht_test_util.py - utility module to walk a directory tree and run tests against files.
* constants.py - definitions for constants used in DHT libraries.
* exceptions.py - definitions for exceptions raised in DHT libraries.

Change-Id: I44770a822e0ec79561b3aa048e555320f622116a
Signed-off-by: Jonathan Holloway <jholloway@redhat.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/glustolibs-gluster/glustolibs/gluster/exceptions.py b/glustolibs-gluster/glustolibs/gluster/exceptions.py
index 42ee48441..c52dcee59 100644
--- a/glustolibs-gluster/glustolibs/gluster/exceptions.py
+++ b/glustolibs-gluster/glustolibs/gluster/exceptions.py
@@ -1,3 +1,86 @@
+#!/usr/bin/env python
+#  Copyright (C) 2018 Red Hat, Inc. <http://www.redhat.com>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along
+#  with this program; if not, write to the Free Software Foundation, Inc.,
+#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+"""Exceptions for Gluster libraries and tests"""
+
+
+class GlusterError(Exception):
+    """Base Gluster exception class."""
+    def __init__(self, arg):
+        Exception.__init__(self, arg)
+        self.msg = arg
+
+
+class TransportEndpointNotConnectedError(GlusterError):
+    """Exception for transport endpoint not connected error."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class NoSuchFileOrDirectoryError(GlusterError):
+    """Exception for no such file or directory error."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class AttributesDoNotMatchError(GlusterError):
+    """Attributes do not match exception."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class LayoutIsNotCompleteError(GlusterError):
+    """Exception raised when the layout of a file is not complete."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class LayoutIsNotBalancedError(GlusterError):
+    """Exception raised when the layout of a file is not balanced."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class LayoutHasHolesError(GlusterError):
+    """Exception raised when the layout of a file has holes."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class LayoutHasOverlapsError(GlusterError):
+    """Exception raised when the layout of a file has overlaps."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
+class FileDoesNotExistOnHashedBricksError(GlusterError):
+    """Exception raised when a file/dir does not exist where it is hashed."""
+    def __init__(self, arg):
+        GlusterError.__init__(self, arg)
+        self.msg = arg
+
+
 class ConfigError(Exception):
     '''
     Custom exception thrown when there is an unrecoverable configuration error.