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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2023 Nordix 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.apps.controller.usecases;
import static org.onap.policy.drools.apps.controller.usecases.UsecasesConstants.AAI_DEFAULT_GENERIC_VNF;
import static org.onap.policy.drools.apps.controller.usecases.UsecasesConstants.GENERIC_VNF_VNF_ID;
import static org.onap.policy.drools.apps.controller.usecases.UsecasesConstants.GENERIC_VNF_VNF_NAME;
import static org.onap.policy.drools.apps.controller.usecases.UsecasesConstants.PNF_NAME;
import static org.onap.policy.drools.apps.controller.usecases.UsecasesConstants.VSERVER_VSERVER_NAME;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import org.onap.aai.domain.yang.GenericVnf;
import org.onap.policy.controlloop.VirtualControlLoopEvent;
import org.onap.policy.controlloop.actorserviceprovider.OperationOutcome;
import org.onap.policy.controlloop.actorserviceprovider.OperationProperties;
import org.onap.policy.controlloop.actorserviceprovider.TargetType;
import org.onap.policy.controlloop.actorserviceprovider.impl.OperationPartial;
import org.onap.policy.controlloop.actorserviceprovider.parameters.ControlLoopOperationParams;
import org.onap.policy.controlloop.eventmanager.StepContext;
/**
* An operation to get the target entity. This is a "pseudo" operation; it is not found
* within an ActorService, but is created directly. It gets/sets the targetEntity found
* within the step context's properties.
*/
public class GetTargetEntityOperation2 extends OperationPartial {
private final StepContext stepContext;
private final VirtualControlLoopEvent event;
/**
* Constructs the operation as a preprocessing step for a policy's operation.
*
* @param stepContext the step's context
* @param event event being processed
* @param params operation's parameters
*/
public GetTargetEntityOperation2(StepContext stepContext, VirtualControlLoopEvent event,
ControlLoopOperationParams params) {
super(params, null, Collections.emptyList());
this.event = event;
this.stepContext = stepContext;
}
@Override
public List<String> getPropertyNames() {
String propName = detmTarget(params.getTargetType());
return (propName == null ? Collections.emptyList() : List.of(propName));
}
@Override
public CompletableFuture<OperationOutcome> start() {
throw new UnsupportedOperationException("cannot start get-target-entity operation");
}
/**
* Determines the target entity.
*
* @param targetType policy target type
*
* @return the property containing the target entity, or {@code null} if the target
* entity is already known
*/
private String detmTarget(TargetType targetType) {
if (stepContext.contains(OperationProperties.AAI_TARGET_ENTITY)) {
// the target entity has already been determined
return null;
}
if (targetType == null) {
throw new IllegalArgumentException("The target type is null");
}
return switch (targetType) {
case PNF -> detmPnfTarget();
case VM, VNF, VFMODULE -> detmVfModuleTarget();
default -> throw new IllegalArgumentException("The target type is not supported");
};
}
/**
* Determines the PNF target entity.
*
* @return the property containing the target entity, or {@code null} if the target
* entity is already known
*/
private String detmPnfTarget() {
if (!PNF_NAME.equalsIgnoreCase(event.getTarget())) {
throw new IllegalArgumentException("Target does not match target type");
}
String targetEntity = event.getAai().get(PNF_NAME);
if (targetEntity == null) {
throw new IllegalArgumentException("AAI section is missing " + PNF_NAME);
}
setTargetEntity(targetEntity);
return null;
}
/**
* Determines the VF Module target entity.
*
* @return the property containing the target entity, or {@code null} if the target
* entity is already known
*/
private String detmVfModuleTarget() {
String targetFieldName = event.getTarget();
if (targetFieldName == null) {
throw new IllegalArgumentException("Target is null");
}
String targetEntity;
switch (targetFieldName.toLowerCase()) {
case VSERVER_VSERVER_NAME:
targetEntity = event.getAai().get(VSERVER_VSERVER_NAME);
break;
case GENERIC_VNF_VNF_ID:
targetEntity = event.getAai().get(GENERIC_VNF_VNF_ID);
break;
case GENERIC_VNF_VNF_NAME:
return detmVnfName();
default:
throw new IllegalArgumentException("Target does not match target type");
}
if (targetEntity == null) {
throw new IllegalArgumentException("Enrichment data is missing " + targetFieldName);
}
setTargetEntity(targetEntity);
return null;
}
/**
* Determines the VNF Name target entity.
*
* @return the property containing the target entity, or {@code null} if the target
* entity is already known
*/
private String detmVnfName() {
// if the onset is enriched with the vnf-id, we don't need an A&AI response
String targetEntity = event.getAai().get(GENERIC_VNF_VNF_ID);
if (targetEntity == null) {
// don't have the data yet - add a step to retrieve it
return AAI_DEFAULT_GENERIC_VNF;
}
setTargetEntity(targetEntity);
return null;
}
@Override
public void setProperty(String name, Object value) {
// only care about one property
if (UsecasesConstants.AAI_DEFAULT_GENERIC_VNF.equals(name)) {
GenericVnf vnf = (GenericVnf) value;
setTargetEntity(vnf.getVnfId());
}
}
/**
* Sets the target entity within the properties.
*
* @param targetEntity the new target entity
*/
private void setTargetEntity(String targetEntity) {
stepContext.setProperty(OperationProperties.AAI_TARGET_ENTITY, targetEntity);
}
}
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