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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.flow;
/**
* Represents a generalized match & action pair to be applied to
* an infrastucture device.
*/
public interface FlowEntry extends FlowRule {
enum FlowEntryState {
/**
* Indicates that this rule has been submitted for addition.
* Not necessarily in the flow table.
*/
PENDING_ADD,
/**
* Rule has been added which means it is in the flow table.
*/
ADDED,
/**
* Flow has been marked for removal, might still be in flow table.
*/
PENDING_REMOVE,
/**
* Flow has been removed from flow table and can be purged.
*/
REMOVED,
/**
* Indicates that the installation of this flow has failed.
*/
FAILED
}
/**
* Returns the flow entry state.
*
* @return flow entry state
*/
FlowEntryState state();
/**
* Returns the number of milliseconds this flow rule has been applied.
*
* @return number of millis
*/
long life();
/**
* Returns the number of packets this flow rule has matched.
*
* @return number of packets
*/
long packets();
/**
* Returns the number of bytes this flow rule has matched.
*
* @return number of bytes
*/
long bytes();
// TODO: consider removing this attribute
/**
* When this flow entry was last deemed active.
* @return epoch time of last activity
*/
long lastSeen();
/**
* Indicates the error type.
* @return an integer value of the error
*/
int errType();
/**
* Indicates the error code.
* @return an integer value of the error
*/
int errCode();
}
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