| /* |
| * Copyright 2016 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.Objects; |
| import java.util.Set; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Utility for examining differences between two {@link Partition partition} values. |
| */ |
| public class PartitionDiff { |
| |
| private final Partition oldValue; |
| private final Partition newValue; |
| private final PartitionId partitionId; |
| private final Set<NodeId> currentMembers; |
| private final Set<NodeId> newMembers; |
| |
| public PartitionDiff(Partition oldValue, Partition newValue) { |
| this.oldValue = oldValue; |
| this.newValue = newValue; |
| this.partitionId = oldValue.getId(); |
| this.currentMembers = oldValue == null ? ImmutableSet.of() : ImmutableSet.copyOf(oldValue.getMembers()); |
| this.newMembers = newValue == null ? ImmutableSet.of() : ImmutableSet.copyOf(newValue.getMembers()); |
| } |
| |
| /** |
| * Returns the new partition identifier. |
| * @return partition id |
| */ |
| public PartitionId partitionId() { |
| return partitionId; |
| } |
| |
| /** |
| * Returns the old partition value. |
| * @return partition |
| */ |
| public Partition oldValue() { |
| return oldValue; |
| } |
| |
| /** |
| * Returns the new partition value. |
| * @return partition |
| */ |
| public Partition newValue() { |
| return newValue; |
| } |
| |
| /** |
| * Returns if there are differences between the two values. |
| * @return {@code true} if yes; {@code false} otherwise |
| */ |
| public boolean hasChanged() { |
| return !Sets.symmetricDifference(currentMembers, newMembers).isEmpty(); |
| } |
| |
| /** |
| * Returns if the specified node is introduced in the new value. |
| * @param nodeId node identifier |
| * @return {@code true} if yes; {@code false} otherwise |
| */ |
| public boolean isAdded(NodeId nodeId) { |
| return !currentMembers.contains(nodeId) && newMembers.contains(nodeId); |
| } |
| |
| /** |
| * Returns if the specified node is removed in the new value. |
| * @param nodeId node identifier |
| * @return {@code true} if yes; {@code false} otherwise |
| */ |
| public boolean isRemoved(NodeId nodeId) { |
| return currentMembers.contains(nodeId) && !newMembers.contains(nodeId); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(oldValue, newValue); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == null || !(other instanceof PartitionDiff)) { |
| return false; |
| } |
| PartitionDiff that = (PartitionDiff) other; |
| return Objects.equals(this.oldValue, that.oldValue) && |
| Objects.equals(this.newValue, that.newValue); |
| |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("oldValue", oldValue) |
| .add("newValue", newValue) |
| .toString(); |
| } |
| } |