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/*
* Copyright 2014-2015 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.cluster;
import java.util.Set;
import org.joda.time.DateTime;
import org.onosproject.event.ListenerService;
/**
* Service for obtaining information about the individual nodes within
* the controller cluster.
*/
public interface ClusterService
extends ListenerService<ClusterEvent, ClusterEventListener> {
/**
* Returns the local controller node.
*
* @return local controller node
*/
ControllerNode getLocalNode();
/**
* Returns the set of current cluster members.
*
* @return set of cluster members
*/
Set<ControllerNode> getNodes();
/**
* Returns the specified controller node.
*
* @param nodeId controller node identifier
* @return controller node
*/
ControllerNode getNode(NodeId nodeId);
/**
* Returns the availability state of the specified controller node.
*
* @param nodeId controller node identifier
* @return availability state
*/
ControllerNode.State getState(NodeId nodeId);
/**
* Returns the system time when the availability state was last updated.
*
* @param nodeId controller node identifier
* @return system time when the availability state was last updated.
*/
DateTime getLastUpdated(NodeId nodeId);
}
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