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+# Copyright 2015 Intel Corporation.
+#
+# 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.
+
+"""Abstract "system metrics logger" model.
+"""
+
+CMD_PREFIX = 'metricscmd : '
+
+class ICollector(object):
+ """This is an abstract class for system metrics loggers.
+ """
+
+ def log_mem_stats(self):
+ """Log memory statistics.
+
+ Where implemented, this function should raise an exception on
+ failure.
+ """
+ raise NotImplementedError('Please call an implementation.')
+
+ def log_cpu_stats(self):
+ """Log cpu statistics.
+
+ Where implemented, this function should raise an exception on
+ failure.
+ """
+ raise NotImplementedError('Please call an implementation.')