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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.List;
import java.util.Objects;
import java.util.Optional;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableList;
/**
* An immutable container for role information for a device,
* within the current cluster. Role attributes include current
* master and a preference-ordered list of backup nodes.
*/
public class RoleInfo {
private final Optional<NodeId> master;
private final List<NodeId> backups;
public RoleInfo(NodeId master, List<NodeId> backups) {
this.master = Optional.ofNullable(master);
this.backups = ImmutableList.copyOf(backups);
}
public RoleInfo() {
this.master = Optional.empty();
this.backups = ImmutableList.of();
}
// This will return a Optional<NodeId> in the future.
public NodeId master() {
return master.orElseGet(() -> null);
}
public List<NodeId> backups() {
return backups;
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof RoleInfo)) {
return false;
}
RoleInfo that = (RoleInfo) other;
return Objects.equals(this.master, that.master)
&& Objects.equals(this.backups, that.backups);
}
@Override
public int hashCode() {
return Objects.hash(master, backups);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this.getClass())
.add("master", master.orElseGet(() -> null))
.add("backups", backups)
.toString();
}
}
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