Add common filter/filter handler for filter scheduler

Filter scheduler is being used for more than one core projects (Nova
and Cinder as of writing), the implementation shared a lot of common
code.  This patch moves base filter/filter handler class as well as
common filter implementation for filter scheduler into oslo to reduce
possible porting.

implement bp: common-filters

Change-Id: If0b1dee79c410c98e152230b55c1ec5dbcdef27c

1 files changed, 46 insertions, 0 deletions

diff --git a/tests/unit/scheduler/fake_hosts.py b/tests/unit/scheduler/fake_hosts.py
new file mode 100644
index 0000000..e3e8ac0
--- /dev/null
+++ b/tests/unit/scheduler/fake_hosts.py
@@ -0,0 +1,46 @@
+# Copyright 2012 Intel Inc, OpenStack LLC.
+# 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.
+"""
+Fakes For filters tests.
+"""
+
+
+class FakeHostManager(object):
+    """host1: free_ram_mb=1024-512-512=0, free_disk_gb=1024-512-512=0
+       host2: free_ram_mb=2048-512=1536  free_disk_gb=2048-512=1536
+       host3: free_ram_mb=4096-1024=3072  free_disk_gb=4096-1024=3072
+       host4: free_ram_mb=8192  free_disk_gb=8192"""
+
+    def __init__(self):
+        self.service_states = {
+            'host1': {
+                'compute': {'host_memory_free': 1073741824},
+            },
+            'host2': {
+                'compute': {'host_memory_free': 2147483648},
+            },
+            'host3': {
+                'compute': {'host_memory_free': 3221225472},
+            },
+            'host4': {
+                'compute': {'host_memory_free': 999999999},
+            },
+        }
+
+
+class FakeHostState(object):
+    def __init__(self, host, attribute_dict):
+        for (key, val) in attribute_dict.iteritems():
+            setattr(self, key, val)