| /* |
| * 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.Device; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.config.NetworkConfigService; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.intent.ResourceContext; |
| import org.onosproject.net.intent.constraint.BooleanConstraint; |
| import org.onosproject.pcep.api.DeviceCapability; |
| |
| import java.util.Objects; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| |
| /** |
| * Constraint that evaluates whether devices satisfies capability. |
| */ |
| public final class CapabilityConstraint extends BooleanConstraint { |
| |
| private final CapabilityType capabilityType; |
| public static final String LSRID = "lsrId"; |
| public static final String TRUE = "true"; |
| |
| /** |
| * Represents about capability type. |
| */ |
| public enum CapabilityType { |
| /** |
| * Signifies that path is created via signaling mode. |
| */ |
| WITH_SIGNALLING(0), |
| |
| /** |
| * Signifies that path is created via SR mode. |
| */ |
| SR_WITHOUT_SIGNALLING(1), |
| |
| /** |
| * Signifies that path is created via without signaling and without SR mode. |
| */ |
| WITHOUT_SIGNALLING_AND_WITHOUT_SR(2); |
| |
| int value; |
| |
| /** |
| * Assign val with the value as the capability type. |
| * |
| * @param val capability type |
| */ |
| CapabilityType(int val) { |
| value = val; |
| } |
| |
| /** |
| * Returns value of capability type. |
| * |
| * @return capability type |
| */ |
| public byte type() { |
| return (byte) value; |
| } |
| } |
| |
| // Constructor for serialization |
| private CapabilityConstraint() { |
| capabilityType = null; |
| } |
| |
| /** |
| * Creates a new capability constraint. |
| * |
| * @param capabilityType type of capability device supports |
| */ |
| public CapabilityConstraint(CapabilityType capabilityType) { |
| this.capabilityType = capabilityType; |
| } |
| |
| /** |
| * Creates a new capability constraint. |
| * |
| * @param capabilityType type of capability device supports |
| * @return instance of CapabilityConstraint for specified capability type |
| */ |
| public static CapabilityConstraint of(CapabilityType capabilityType) { |
| return new CapabilityConstraint(capabilityType); |
| } |
| |
| /** |
| * Obtains type of capability. |
| * |
| * @return type of capability |
| */ |
| public CapabilityType capabilityType() { |
| return capabilityType; |
| } |
| |
| /** |
| * Validates the link based on capability constraint. |
| * |
| * @param link to validate source and destination based on capability constraint |
| * @param deviceService instance of DeviceService |
| * @param netCfgService instance of NetworkConfigService |
| * @return true if link satisfies capability constraint otherwise false |
| */ |
| public boolean isValidLink(Link link, DeviceService deviceService, NetworkConfigService netCfgService) { |
| if (deviceService == null || netCfgService == null) { |
| return false; |
| } |
| |
| Device srcDevice = deviceService.getDevice(link.src().deviceId()); |
| Device dstDevice = deviceService.getDevice(link.dst().deviceId()); |
| |
| //TODO: Usage of annotations are for transient solution. In future will be replaced with the |
| // network config service / Projection model. |
| // L3 device |
| if (srcDevice == null || dstDevice == null) { |
| return false; |
| } |
| |
| String srcLsrId = srcDevice.annotations().value(LSRID); |
| String dstLsrId = dstDevice.annotations().value(LSRID); |
| |
| DeviceCapability srcDeviceConfig = netCfgService.getConfig(DeviceId.deviceId(srcLsrId), |
| DeviceCapability.class); |
| DeviceCapability dstDeviceConfig = netCfgService.getConfig(DeviceId.deviceId(dstLsrId), |
| DeviceCapability.class); |
| |
| switch (capabilityType) { |
| case WITH_SIGNALLING: |
| return true; |
| case WITHOUT_SIGNALLING_AND_WITHOUT_SR: |
| return srcDeviceConfig != null && dstDeviceConfig != null |
| && srcDeviceConfig.localLabelCap() && dstDeviceConfig.localLabelCap(); |
| case SR_WITHOUT_SIGNALLING: |
| return srcDeviceConfig != null && dstDeviceConfig != null && srcDeviceConfig.srCap() |
| && dstDeviceConfig.srCap() && srcDeviceConfig.labelStackCap() && dstDeviceConfig.labelStackCap(); |
| default: |
| return false; |
| } |
| } |
| |
| @Override |
| public boolean isValid(Link link, ResourceContext context) { |
| return false; |
| //Do nothing instead using isValidLink needs device service to validate link |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(capabilityType); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| |
| if (obj instanceof CapabilityConstraint) { |
| CapabilityConstraint other = (CapabilityConstraint) obj; |
| return Objects.equals(this.capabilityType, other.capabilityType); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this) |
| .add("capabilityType", capabilityType) |
| .toString(); |
| } |
| } |