| /* |
| * Copyright 2016-present 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.net.intent.constraint; |
| |
| import com.google.common.annotations.Beta; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.Path; |
| import org.onosproject.net.intent.Constraint; |
| import org.onosproject.net.intent.Intent; |
| import org.onosproject.net.intent.PointToPointIntent; |
| import org.onosproject.net.intent.ResourceContext; |
| |
| /** |
| * Constraint that determines whether to employ path protection. |
| */ |
| @Beta |
| public class ProtectionConstraint implements Constraint { |
| private static final ProtectionConstraint PROTECTION_CONSTRAINT = new ProtectionConstraint(); |
| |
| // doesn't use LinkResourceService |
| @Override |
| public double cost(Link link, ResourceContext context) { |
| return 1; |
| } |
| |
| // doesn't use LinkResourceService |
| @Override |
| public boolean validate(Path path, ResourceContext context) { |
| return true; |
| } |
| |
| /** |
| * Determines whether to utilize path protection for the given intent. |
| * |
| * @param intent intent to be inspected |
| * @return whether the intent has a ProtectionConstraint |
| */ |
| public static boolean requireProtectedPath(Intent intent) { |
| if (intent instanceof PointToPointIntent) { |
| PointToPointIntent pointToPointIntent = (PointToPointIntent) intent; |
| return pointToPointIntent.constraints().stream() |
| .anyMatch(p -> p instanceof ProtectionConstraint); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns protection constraint. |
| * |
| * @return protection constraint |
| */ |
| public static ProtectionConstraint protection() { |
| return PROTECTION_CONSTRAINT; |
| } |
| |
| protected ProtectionConstraint() { |
| } |
| |
| @Override |
| public String toString() { |
| return "Protection"; |
| } |
| } |