| /* |
| * 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.pce.pceservice.constraint; |
| |
| import org.onosproject.net.Link; |
| import org.onosproject.net.LinkKey; |
| import org.onosproject.net.Path; |
| import org.onosproject.net.config.NetworkConfigService; |
| import org.onosproject.net.intent.Constraint; |
| import org.onosproject.net.intent.ResourceContext; |
| import org.onosproject.pcep.api.TeLinkConfig; |
| |
| import java.util.Objects; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Constraint that evaluates whether cost for a link is available, if yes return cost for that link. |
| */ |
| public final class CostConstraint implements Constraint { |
| |
| /** |
| * Represents about cost types. |
| */ |
| public enum Type { |
| /** |
| * Signifies that cost is IGP cost. |
| */ |
| COST(1), |
| |
| /** |
| * Signifies that cost is TE cost. |
| */ |
| TE_COST(2); |
| |
| int value; |
| |
| /** |
| * Assign val with the value as the Cost type. |
| * |
| * @param val Cost type |
| */ |
| Type(int val) { |
| value = val; |
| } |
| |
| /** |
| * Returns value of Cost type. |
| * |
| * @return Cost type |
| */ |
| public byte type() { |
| return (byte) value; |
| } |
| } |
| |
| private final Type type; |
| public static final String TE_COST = "teCost"; |
| public static final String COST = "cost"; |
| |
| // Constructor for serialization |
| private CostConstraint() { |
| this.type = null; |
| } |
| |
| /** |
| * Creates a new cost constraint. |
| * |
| * @param type of a link |
| */ |
| public CostConstraint(Type type) { |
| this.type = checkNotNull(type, "Type cannot be null"); |
| } |
| |
| /** |
| * Creates new CostConstraint with specified cost type. |
| * |
| * @param type of cost |
| * @return instance of CostConstraint |
| */ |
| public static CostConstraint of(Type type) { |
| return new CostConstraint(type); |
| } |
| |
| /** |
| * Returns the type of a cost specified in a constraint. |
| * |
| * @return required cost type |
| */ |
| public Type type() { |
| return type; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(type); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| |
| if (obj instanceof CostConstraint) { |
| CostConstraint other = (CostConstraint) obj; |
| return Objects.equals(this.type, other.type); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this) |
| .add("type", type) |
| .toString(); |
| } |
| |
| @Override |
| public double cost(Link link, ResourceContext context) { |
| return 0; |
| } |
| |
| /** |
| * Validates the link based on cost type specified. |
| * |
| * @param link to validate cost type constraint |
| * @param netCfgService instance of netCfgService |
| * @return true if link satisfies cost constraint otherwise false |
| */ |
| public double isValidLink(Link link, NetworkConfigService netCfgService) { |
| if (netCfgService == null) { |
| return -1; |
| } |
| |
| TeLinkConfig cfg = netCfgService.getConfig(LinkKey.linkKey(link.src(), link.dst()), TeLinkConfig.class); |
| if (cfg == null) { |
| //If cost configuration absent return -1[It is not L3 device] |
| return -1; |
| } |
| |
| switch (type) { |
| case COST: |
| //If IGP cost is zero then IGP cost is not assigned for that link |
| return cfg.igpCost() == 0 ? -1 : cfg.igpCost(); |
| |
| case TE_COST: |
| //If TE cost is zero then TE cost is not assigned for that link |
| return cfg.teCost() == 0 ? -1 : cfg.teCost(); |
| |
| default: |
| return -1; |
| } |
| } |
| |
| @Override |
| public boolean validate(Path path, ResourceContext context) { |
| // TODO Auto-generated method stub |
| return false; |
| } |
| } |