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/*-
* ============LICENSE_START=======================================================
* ONAP : APP-C
* ================================================================================
* Copyright (C) 2017 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.appc.seqgen.dgplugin.impl;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.onap.appc.dg.flowbuilder.exception.InvalidDependencyModelException;
import org.onap.appc.dg.objects.InventoryModel;
import org.onap.appc.dg.objects.Node;
import org.onap.appc.dg.objects.VnfcDependencyModel;
import org.onap.appc.domainmodel.Vnf;
import org.onap.appc.domainmodel.Vnfc;
import org.onap.appc.domainmodel.Vserver;
import org.onap.appc.domainmodel.lcm.VNFOperation;
import org.onap.appc.exceptions.APPCException;
import org.onap.appc.seqgen.SequenceGenerator;
import org.onap.appc.seqgen.dgplugin.SequenceGeneratorPlugin;
import org.onap.appc.seqgen.impl.SequenceGeneratorFactory;
import org.onap.appc.seqgen.objects.Constants;
import org.onap.appc.seqgen.objects.SequenceGeneratorInput;
import org.onap.appc.seqgen.objects.Transaction;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import java.io.IOException;
import java.util.Map;
import java.util.List;
import java.util.HashSet;
import java.util.Set;
import java.util.HashMap;
import java.util.LinkedList;
public class SequenceGeneratorPluginImpl implements SequenceGeneratorPlugin {
private static final EELFLogger logger = EELFManager.getInstance().getLogger(SequenceGeneratorPluginImpl.class);
@Override
public void generateSequence(Map<String, String> params, SvcLogicContext context) {
ObjectMapper objectMapper = new ObjectMapper();
String inputJSON = context.getAttribute("inputJSON");
logger.debug("Input to Sequence Generator " + inputJSON);
try {
SequenceGeneratorInput sequenceGeneratorInput = buildSequenceGeneratorInput(inputJSON);
List<Transaction> sequence = generateSequence(sequenceGeneratorInput);
String output = objectMapper.writeValueAsString(sequence);
logger.debug("Sequence Generator Output " + output);
context.setAttribute("output", output);
} catch (Exception e) {
logger.error("Error generating sequence", e);
context.setAttribute("error-code", "401");
context.setAttribute("error-message", "Error generating sequence " + e.getMessage());
}
}
private SequenceGeneratorInput buildSequenceGeneratorInput(String inputJson) throws IOException, APPCException {
ObjectMapper objectMapper = new ObjectMapper();
SequenceGeneratorInput sequenceGeneratorInput ;
objectMapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
objectMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
sequenceGeneratorInput = objectMapper.readValue(inputJson, SequenceGeneratorInput.class);
InventoryModel inventoryModel = buildInventoryModel(inputJson);
sequenceGeneratorInput.setInventoryModel(inventoryModel);
VnfcDependencyModel dependencyModel = buildDependencyModel(inputJson);
if(dependencyModel!=null){
validateInventoryModelWithDependencyModel(dependencyModel,inventoryModel);
}
sequenceGeneratorInput.setDependencyModel(dependencyModel);
return sequenceGeneratorInput;
}
private List<Transaction> generateSequence(SequenceGeneratorInput sequenceGeneratorInput) throws APPCException {
if (sequenceGeneratorInput.getRequestInfo() == null) {
throw new APPCException("Request info is not provided in the input");
}
String action = sequenceGeneratorInput.getRequestInfo().getAction();
VNFOperation operation = VNFOperation.findByString(action);
if (operation == null) {
throw new APPCException("Invalid Action " + action);
}
if(Constants.ActionLevel.findByString(sequenceGeneratorInput.getRequestInfo().getActionLevel().toUpperCase())==null){
throw new APPCException("Invalid Action Level " + sequenceGeneratorInput.getRequestInfo().getActionLevel());
}
SequenceGenerator sequenceGenerator = SequenceGeneratorFactory.getInstance().createSequenceGenerator(operation);
return sequenceGenerator.generateSequence(sequenceGeneratorInput);
}
private void validateInventoryModelWithDependencyModel(VnfcDependencyModel dependencyModel, InventoryModel inventoryModel) throws APPCException {
Set<String> dependencyModelVnfcSet = new HashSet<>();
Set<String> dependencyModelMandatoryVnfcSet = new HashSet<>();
Set<String> inventoryModelVnfcsSet = new HashSet<>();
for (Node<Vnfc> node : dependencyModel.getDependencies()) {
dependencyModelVnfcSet.add(node.getChild().getVnfcType().toLowerCase());
if (node.getChild().isMandatory()) {
dependencyModelMandatoryVnfcSet.add(node.getChild().getVnfcType().toLowerCase());
}
}
for (Vnfc vnfc : inventoryModel.getVnf().getVnfcs()) {
inventoryModelVnfcsSet.add(vnfc.getVnfcType().toLowerCase());
}
// if dependency model and inventory model contains same set of VNFCs, validation succeed and hence return
if (dependencyModelVnfcSet.equals(inventoryModelVnfcsSet)) {
return;
}
if (inventoryModelVnfcsSet.size() >= dependencyModelVnfcSet.size()) {
Set<String> difference = new HashSet<>(inventoryModelVnfcsSet);
difference.removeAll(dependencyModelVnfcSet);
logger.error("Dependency model is missing following vnfc type(s): " + difference);
throw new APPCException("Dependency model is missing following vnfc type(s): " + difference);
} else {
Set<String> difference = new HashSet<>(dependencyModelMandatoryVnfcSet);
difference.removeAll(inventoryModelVnfcsSet);
if (difference.size() > 0) {
logger.error("Inventory model is missing following mandatory vnfc type(s): " + difference);
throw new APPCException("VMs missing for the mandatory VNFC : " + difference);
}
}
}
// Dependency model is an optional attribute and may contain null values
private VnfcDependencyModel buildDependencyModel(String inputJson) throws IOException, APPCException {
Set<Node<Vnfc>> dependency = new HashSet<>();
Set<String> parentVnfcs=new HashSet<>();
Set<String> allVnfcTypes=new HashSet<>();
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
JsonNode rootNode = objectMapper.readTree(inputJson);
JsonNode vnfcs = getVnfcsNode(rootNode);
if (vnfcs != null) {
for (JsonNode vnfcNode : vnfcs) {
String vnfcType = readVnfcType(vnfcNode);
allVnfcTypes.add(vnfcType);
String mandatory = readMandatory(vnfcNode);
String resilience = readResilience(vnfcNode);
Vnfc vnfc = new Vnfc();
vnfc.setVnfcType(vnfcType);
vnfc.setResilienceType(resilience);
vnfc.setMandatory(Boolean.parseBoolean(mandatory));
Node<Vnfc> currentNode = getNode(dependency, vnfcType);
if (currentNode == null) {
currentNode = new Node<>(vnfc);
dependency.add(currentNode);
} else {
currentNode.getChild().setMandatory(Boolean.valueOf(mandatory));
currentNode.getChild().setResilienceType(resilience);
}
JsonNode parents = vnfcNode.get("parents");
for (JsonNode parent : parents) {
String parentVnfcType = parent.asText();
parentVnfcs.add(parentVnfcType);
Node<Vnfc> parentNode = getNode(dependency, parentVnfcType);
if (parentNode != null) {
currentNode.addParent(parentNode.getChild());
} else {
Vnfc parentVnfc=new Vnfc();
parentVnfc.setVnfcType(parentVnfcType);
parentVnfc.setMandatory(false);
parentNode = new Node<>(parentVnfc);
currentNode.addParent(parentVnfc);
dependency.add(parentNode);
}
}
}
for(String parent:parentVnfcs){
if(!allVnfcTypes.contains(parent)){
throw new APPCException("Dependency model missing vnfc type "+parent);
}
}
return new VnfcDependencyModel(dependency);
}
return null;
}
private String readResilience(JsonNode vnfcNode) {
String resilience = null;
if (vnfcNode.get("resilience") != null) {
resilience = vnfcNode.get("resilience").asText();
}
return resilience;
}
private String readMandatory(JsonNode vnfcNode) {
String mandatory ;
JsonNode mandatoryNode = vnfcNode.get("mandatory");
if (mandatoryNode == null) {
mandatory = "false";
} else {
mandatory = mandatoryNode.asText();
}
return mandatory;
}
private String readVnfcType(JsonNode vnfcNode) throws APPCException {
JsonNode vnfcTypeNode = vnfcNode.get(Constants.VNFC_TYPE);
if (vnfcTypeNode == null) {
throw new APPCException("vnfc-type is not available in dependency info");
}
return vnfcTypeNode.asText();
}
private JsonNode getVnfcsNode(JsonNode rootNode) {
JsonNode dependencyInfo = rootNode.get("dependency-info");
JsonNode vnfcs = null;
if (dependencyInfo != null) {
vnfcs = dependencyInfo.get("vnfcs");
}
return vnfcs;
}
private Node<Vnfc> getNode(Set<Node<Vnfc>> dependency, String vnfcType) {
for (Node<Vnfc> node : dependency) {
if (node.getChild().getVnfcType().equals(vnfcType)) {
return node;
}
}
return null;
}
private InventoryModel buildInventoryModel(String inputJson) throws IOException, APPCException {
ObjectMapper objectMapper = new ObjectMapper();
JsonNode jsonNode = objectMapper.readTree(inputJson);
JsonNode inventoryInfo = jsonNode.get("inventory-info");
if (inventoryInfo == null) {
throw new APPCException("inventory-info is not provided in the input");
}
JsonNode vnfInfo = inventoryInfo.get("vnf-info");
if (vnfInfo == null) {
throw new APPCException("vnf-info is not provided in the input");
}
String vnfId = vnfInfo.get("vnf-id").asText();
String vnfType = vnfInfo.get("vnf-type").asText();
Vnf vnf =new Vnf();
vnf.setVnfId(vnfId);
vnf.setVnfType(vnfType);
Map<Vnfc, List<Vserver>> vfcs = new HashMap<>();
JsonNode vms = vnfInfo.get("vm");
if(vms.size()<1){
throw new APPCException("vm info not provided in the input");
}
for (JsonNode vm : vms) {
if(vm.get("vserver-id")== null){
throw new APPCException("vserver-id not found ");
}
String vserverId = vm.get("vserver-id").asText();
Vserver vserver = new Vserver();
vserver.setId(vserverId);
if (vm.get("vnfc")!=null&& vm.get("vnfc").get("vnfc-name") != null && vm.get("vnfc").get("vnfc-type")!= null) {
Vnfc vfc = new Vnfc();
vfc.setVnfcType(vm.get("vnfc").get("vnfc-type").asText());
vfc.setVnfcName(vm.get("vnfc").get("vnfc-name").asText());
vserver.setVnfc(vfc);
List<Vserver> vServers = vfcs.get(vfc);
if (vServers == null) {
vServers = new LinkedList<>();
vfcs.put(vfc, vServers);
}
vServers.add(vserver);
}
vnf.addVserver(vserver);
}
for (Map.Entry<Vnfc, List<Vserver>> entry : vfcs.entrySet()) {
Vnfc vnfc = entry.getKey();
List<Vserver> vServers = vfcs.get(vnfc);
vnfc.addVservers(vServers);
}
return new InventoryModel(vnf);
}
}
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