| /* |
| * Copyright 2016-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.cluster; |
| |
| import static com.google.common.base.Preconditions.checkState; |
| |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Utility for examining differences between two {@link ClusterMetadata metadata} values. |
| */ |
| public class ClusterMetadataDiff { |
| |
| private final ClusterMetadata oldValue; |
| private final ClusterMetadata newValue; |
| private final Set<ControllerNode> nodesAdded; |
| private final Set<NodeId> nodesRemoved; |
| |
| public ClusterMetadataDiff(ClusterMetadata oldValue, ClusterMetadata newValue) { |
| this.oldValue = oldValue; |
| this.newValue = newValue; |
| |
| Set<ControllerNode> currentNodeSet = oldValue == null |
| ? ImmutableSet.of() : ImmutableSet.copyOf(oldValue.getNodes()); |
| Set<ControllerNode> newNodeSet = newValue == null |
| ? ImmutableSet.of() : ImmutableSet.copyOf(newValue.getNodes()); |
| nodesAdded = Sets.difference(newNodeSet, currentNodeSet); |
| nodesRemoved = Sets.difference(currentNodeSet, newNodeSet) |
| .stream() |
| .map(ControllerNode::id) |
| .collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Returns the set of {@link ControllerNode nodes} added with this metadata change. |
| * @return set of controller nodes |
| */ |
| public Set<ControllerNode> nodesAdded() { |
| return nodesAdded; |
| } |
| |
| /** |
| * Returns the set of {@link ControllerNode nodes} removed with this metadata change. |
| * @return set of controller node identifiers |
| */ |
| public Set<NodeId> nodesRemoved() { |
| return nodesRemoved; |
| } |
| |
| /** |
| * Returns a mapping of all partition diffs. |
| * @return partition diffs. |
| */ |
| public Map<PartitionId, PartitionDiff> partitionDiffs() { |
| Map<PartitionId, Partition> oldPartitions = Maps.newHashMap(); |
| oldValue.getPartitions() |
| .forEach(p -> oldPartitions.put(p.getId(), p)); |
| Map<PartitionId, Partition> newPartitions = Maps.newHashMap(); |
| newValue.getPartitions() |
| .forEach(p -> newPartitions.put(p.getId(), p)); |
| checkState(Sets.symmetricDifference(oldPartitions.keySet(), newPartitions.keySet()).isEmpty(), |
| "Number of partitions cannot change"); |
| Map<PartitionId, PartitionDiff> partitionDiffs = Maps.newHashMap(); |
| oldPartitions.forEach((k, v) -> { |
| partitionDiffs.put(k, new PartitionDiff(v, newPartitions.get(k))); |
| }); |
| return partitionDiffs; |
| } |
| } |