1 files changed, 204 insertions, 0 deletions
diff --git a/controlloop/common/controller-usecases/src/main/java/org/onap/policy/drools/apps/controller/usecases/GetTargetEntityOperation2.java b/controlloop/common/controller-usecases/src/main/java/org/onap/policy/drools/apps/controller/usecases/GetTargetEntityOperation2.java
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+++ b/controlloop/common/controller-usecases/src/main/java/org/onap/policy/drools/apps/controller/usecases/GetTargetEntityOperation2.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.impl.OperationPartial;
+import org.onap.policy.controlloop.actorserviceprovider.parameters.ControlLoopOperationParams;
+import org.onap.policy.controlloop.eventmanager.StepContext;
+import org.onap.policy.controlloop.policy.Target;
+
+/**
+ * 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.getTarget());
+        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 target policy target
+     *
+     * @return the property containing the target entity, or {@code null} if the target
+     *         entity is already known
+     */
+    private String detmTarget(Target target) {
+        if (stepContext.contains(OperationProperties.AAI_TARGET_ENTITY)) {
+            // the target entity has already been determined
+            return null;
+        }
+
+        if (target == null) {
+            throw new IllegalArgumentException("The target is null");
+        }
+
+        if (target.getType() == null) {
+            throw new IllegalArgumentException("The target type is null");
+        }
+
+        switch (target.getType()) {
+            case PNF:
+                return detmPnfTarget();
+            case VM:
+            case VNF:
+            case VFMODULE:
+                return 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);
+    }
+}