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/*
* Copyright 2014 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.net.statistic;
import org.onosproject.net.ConnectPoint;
import org.onosproject.net.flow.FlowEntry;
import org.onosproject.net.flow.FlowRule;
import java.util.Set;
/**
* Store to house the computed statistics.
*/
public interface StatisticStore {
/**
* Lay the foundation for receiving flow stats for this rule.
*
* @param rule a {@link org.onosproject.net.flow.FlowRule}
*/
void prepareForStatistics(FlowRule rule);
/**
* Remove entries associated with this rule.
*
* @param rule {@link org.onosproject.net.flow.FlowRule}
*/
void removeFromStatistics(FlowRule rule);
/**
* Adds a stats observation for a flow rule.
*
* @param rule a {@link org.onosproject.net.flow.FlowEntry}
*/
void addOrUpdateStatistic(FlowEntry rule);
/**
* Fetches the current observed stats values.
*
* @param connectPoint the port to fetch information for
* @return set of current flow rules
*/
Set<FlowEntry> getCurrentStatistic(ConnectPoint connectPoint);
/**
* Fetches the current observed stats values.
*
* @param connectPoint the port to fetch information for
* @return set of current values
*/
Set<FlowEntry> getPreviousStatistic(ConnectPoint connectPoint);
}
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