| /* |
| * Copyright 2018-present Open Networking Foundation |
| * |
| * 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.mastership; |
| |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.stream.Collectors; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.net.MastershipRole; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| |
| /** |
| * Mastership info. |
| */ |
| public final class MastershipInfo { |
| private final long term; |
| private final Optional<NodeId> master; |
| private final ImmutableMap<NodeId, MastershipRole> roles; |
| |
| public MastershipInfo() { |
| this(0, Optional.empty(), ImmutableMap.of()); |
| } |
| |
| public MastershipInfo(long term, Optional<NodeId> master, ImmutableMap<NodeId, MastershipRole> roles) { |
| this.term = term; |
| this.master = master; |
| this.roles = roles; |
| } |
| |
| /** |
| * Returns the mastership term. |
| * |
| * @return the mastership term |
| */ |
| public long term() { |
| return term; |
| } |
| |
| /** |
| * Returns the current master. |
| * |
| * @return the current master |
| */ |
| public Optional<NodeId> master() { |
| return master; |
| } |
| |
| /** |
| * Returns a sorted list of standby nodes. |
| * |
| * @return a sorted list of standby nodes |
| */ |
| public List<NodeId> backups() { |
| return getRoles(MastershipRole.STANDBY); |
| } |
| |
| /** |
| * Returns the list of nodes with the given role. |
| * |
| * @param role the role by which to filter nodes |
| * @return an immutable list of nodes with the given role sorted in priority order |
| */ |
| public List<NodeId> getRoles(MastershipRole role) { |
| return ImmutableList.copyOf(roles.entrySet() |
| .stream() |
| .filter(entry -> entry.getValue() == role) |
| .map(Map.Entry::getKey) |
| .collect(Collectors.toList())); |
| } |
| |
| /** |
| * Returns the current role for the given node. |
| * |
| * @param nodeId the node for which to return the current role |
| * @return the current role for the given node |
| */ |
| public MastershipRole getRole(NodeId nodeId) { |
| return roles.get(nodeId); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(term, master, roles); |
| } |
| |
| @Override |
| public boolean equals(Object object) { |
| if (object instanceof MastershipInfo) { |
| MastershipInfo that = (MastershipInfo) object; |
| return this.term == that.term |
| && Objects.equals(this.master, that.master) |
| && Objects.equals(this.roles, that.roles); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this) |
| .add("term", term) |
| .add("master", master) |
| .add("roles", roles) |
| .toString(); |
| } |
| } |