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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.store.flow;
import static com.google.common.base.Preconditions.checkNotNull;
import java.util.Collections;
import java.util.List;
import org.onosproject.cluster.NodeId;
import com.google.common.base.Objects;
import com.google.common.base.Optional;
/**
* Class to represent placement information about Master/Backup copy.
*/
public final class ReplicaInfo {
private final Optional<NodeId> master;
private final List<NodeId> backups;
/**
* Creates a ReplicaInfo instance.
*
* @param master NodeId of the node where the master copy should be
* @param backups list of NodeId, where backup copies should be placed
*/
public ReplicaInfo(NodeId master, List<NodeId> backups) {
this.master = Optional.fromNullable(master);
this.backups = checkNotNull(backups);
}
/**
* Returns the NodeId, if there is a Node where the master copy should be.
*
* @return NodeId, where the master copy should be placed
*/
public Optional<NodeId> master() {
return master;
}
/**
* Returns the collection of NodeId, where backup copies should be placed.
*
* @return collection of NodeId, where backup copies should be placed
*/
public List<NodeId> backups() {
return backups;
}
@Override
public int hashCode() {
return Objects.hashCode(master, backups);
}
@Override
public boolean equals(Object other) {
if (!(other instanceof ReplicaInfo)) {
return false;
}
ReplicaInfo that = (ReplicaInfo) other;
return Objects.equal(this.master, that.master) &&
Objects.equal(this.backups, that.backups);
}
// for Serializer
private ReplicaInfo() {
this.master = Optional.absent();
this.backups = Collections.emptyList();
}
}
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