renderers/faas/src/main/java/org/opendaylight/groupbasedpolicy/renderer/faas/FaasContractManagerListener.java

   1 /*
   2  * Copyright (c) 2015 Huawei Technologies and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.renderer.faas;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13 import java.util.Map;
  14 import java.util.UUID;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import java.util.concurrent.ScheduledExecutorService;
  17
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  20 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  21 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  22 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  23 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  24 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  25 import org.opendaylight.faas.uln.datastore.api.UlnDatastoreApi;
  26 import org.opendaylight.groupbasedpolicy.util.DataStoreHelper;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.common.rev151013.Name;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.common.rev151013.Text;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.common.rev151013.Uuid;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.parameter.values.grouping.ParameterValue;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.parameter.values.grouping.ParameterValueBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.parameter.values.grouping.parameter.value.RangeValueBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.SecurityRuleGroupsBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.SecurityRuleGroup;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.SecurityRuleGroupBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.SecurityRule;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.SecurityRuleBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.security.rule.RuleAction;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.security.rule.RuleActionBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.security.rule.RuleClassifier;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.security.rule.RuleClassifier.Direction;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.security.rules.rev151013.security.rule.groups.attributes.security.rule.groups.container.security.rule.groups.security.rule.group.security.rule.RuleClassifierBuilder;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.ActionName;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.ClassifierName;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.ContractId;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.SubjectName;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.TenantId;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.faas.rev151009.mapped.tenants.entities.mapped.entity.MappedContract;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.faas.rev151009.mapped.tenants.entities.mapped.entity.MappedContractBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.Tenants;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.has.action.refs.ActionRef;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.has.classifier.refs.ClassifierRef;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.Tenant;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.TenantKey;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.Policy;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.Contract;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.SubjectFeatureInstances;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.contract.Clause;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.contract.Subject;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.contract.subject.Rule;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.subject.feature.instances.ActionInstance;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.subject.feature.instances.ActionInstanceKey;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.subject.feature.instances.ClassifierInstance;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.subject.feature.instances.ClassifierInstanceKey;
  65 import org.opendaylight.yangtools.yang.binding.DataObject;
  66 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  67 import org.slf4j.Logger;
  68 import org.slf4j.LoggerFactory;
  69
  70 import com.google.common.base.Optional;
  71
  72 public class FaasContractManagerListener implements DataChangeListener {
  73
  74     private static final Logger LOG = LoggerFactory.getLogger(FaasContractManagerListener.class);
  75     private ConcurrentHashMap<ContractId, Uuid> mappedContracts = new ConcurrentHashMap<>();
  76     private final ScheduledExecutorService executor;
  77     private final DataBroker dataProvider;
  78     private final TenantId gbpTenantId;
  79     private final Uuid faasTenantId;
  80
  81     public FaasContractManagerListener(DataBroker dataProvider, TenantId gbpTenantId, Uuid faasTenantId,
  82             ScheduledExecutorService executor) {
  83         this.executor = executor;
  84         this.gbpTenantId = gbpTenantId;
  85         this.faasTenantId = faasTenantId;
  86         this.dataProvider = dataProvider;
  87     }
  88
  89     @Override
  90     public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
  91         executor.execute(new Runnable() {
  92
  93             public void run() {
  94                 executeEvent(change);
  95             }
  96         });
  97     }
  98
  99     private void executeEvent(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
 100         // Create
 101         for (DataObject dao : change.getCreatedData().values()) {
 102             if (dao instanceof Contract) {
 103                 Contract contract = (Contract) dao;
 104                 LOG.debug("Contract {} is Created.", contract.getId().getValue());
 105                 UlnDatastoreApi.submitSecurityGroupsToDs(initSecurityGroupBuilder(contract).build());
 106             }
 107         }
 108         // Update
 109         Map<InstanceIdentifier<?>, DataObject> dao = change.getUpdatedData();
 110         for (Map.Entry<InstanceIdentifier<?>, DataObject> entry : dao.entrySet()) {
 111             if (entry.getValue() instanceof Contract) {
 112                 Contract contract = (Contract) dao;
 113                 LOG.debug("Contract {} is Updated.", contract.getId().getValue());
 114                 UlnDatastoreApi.submitSecurityGroupsToDs(initSecurityGroupBuilder(contract).build());
 115             }
 116         }
 117         // Remove
 118         for (InstanceIdentifier<?> iid : change.getRemovedPaths()) {
 119             DataObject old = change.getOriginalData().get(iid);
 120             if (old == null) {
 121                 continue;
 122             }
 123             if (old instanceof Contract) {
 124                 Contract contract = (Contract) old;
 125                 LOG.debug("Contract {} is removed.", contract.getId().getValue());
 126                 ReadWriteTransaction rwTx = dataProvider.newReadWriteTransaction();
 127                 Optional<MappedContract> op = DataStoreHelper.removeIfExists(LogicalDatastoreType.OPERATIONAL,
 128                         FaasIidFactory.mappedContractIid(gbpTenantId, contract.getId()), rwTx);
 129                 if (op.isPresent()) {
 130                     DataStoreHelper.submitToDs(rwTx);
 131                 }
 132                 Uuid val = mappedContracts.remove(contract.getId());
 133                 if (val != null) {
 134                     UlnDatastoreApi.removeSecurityGroupsFromDsIfExists(faasTenantId, val);
 135                 }
 136             }
 137         }
 138     }
 139
 140     public void loadAll(List<Contract> contracts, List<MappedContract> mpContracts) {
 141         if (mpContracts != null) {
 142             for (MappedContract mpContract : mpContracts) {
 143                 mappedContracts.putIfAbsent(mpContract.getGbpContractId(), mpContract.getFaasSecurityRulesId());
 144             }
 145         }
 146         if (contracts != null) {
 147             for (Contract contract : contracts) {
 148                 LOG.debug("Loading Contract {}", contract.getId().getValue());
 149                 UlnDatastoreApi.submitSecurityGroupsToDs(initSecurityGroupBuilder(contract).build());
 150             }
 151         }
 152     }
 153
 154     protected SecurityRuleGroupsBuilder initSecurityGroupBuilder(Contract contract) {
 155         LOG.trace("Start initSecurityGroupBuilder");
 156         SecurityRuleGroupsBuilder builder = new SecurityRuleGroupsBuilder();
 157         builder.setUuid(getFaasSecurityRulesId(contract.getId()));
 158         builder.setName(new Text(contract.getId().getValue()));
 159         if (contract.getDescription() != null)
 160             builder.setDescription(new Text("gbp-contract: " + contract.getDescription().getValue()));
 161         else
 162             builder.setDescription(new Text("gbp-contract"));
 163         builder.setTenantId(faasTenantId);
 164         builder.setSecurityRuleGroup(buildSecurityRuleGroup(contract));
 165         LOG.trace("Contract {} is mapped to Faas Security Rules {} ", contract.getId().getValue(), builder.getUuid()
 166             .getValue());
 167         return builder;
 168     }
 169
 170     private Uuid getFaasSecurityRulesId(ContractId contractId) {
 171         Uuid val = mappedContracts.get(contractId);
 172         if (val != null) {
 173             return val;
 174         }
 175         Uuid faasContractId = null;
 176         if (FaasPolicyManager.isUUid(contractId.getValue())) {
 177             faasContractId = new Uuid(contractId.getValue());
 178         } else {
 179             faasContractId = new Uuid(UUID.randomUUID().toString());
 180         }
 181         mappedContracts.putIfAbsent(contractId, faasContractId);
 182         val = mappedContracts.get(contractId);
 183         MappedContractBuilder builder = new MappedContractBuilder();
 184         builder.setFaasSecurityRulesId(val);
 185         builder.setGbpContractId(contractId);
 186         WriteTransaction wTx = dataProvider.newWriteOnlyTransaction();
 187         MappedContract result = builder.build();
 188         wTx.put(LogicalDatastoreType.OPERATIONAL,
 189                 FaasIidFactory.mappedContractIid(gbpTenantId, contractId), result);
 190         if (DataStoreHelper.submitToDs(wTx)) {
 191             LOG.debug("Cached in Datastore Mapped Contract {}", result);
 192         } else {
 193             LOG.error("Couldn't Cache in Datastore Mapped Contract {}", result);
 194         }
 195         return val;
 196     }
 197
 198     private List<SecurityRuleGroup> buildSecurityRuleGroup(Contract contract) {
 199         LOG.trace("Start buildSecurityRuleGroup for contract {}", contract.getId().getValue());
 200         List<SecurityRuleGroup> securityRuleGroups = new ArrayList<>();
 201         if (contract.getClause() == null) {
 202             LOG.debug("contract {} has no Clause", contract.getId().getValue());
 203             return null;
 204         }
 205         for (Clause clause : contract.getClause()) {
 206             if (clause.getSubjectRefs() == null) {
 207                 LOG.debug("Clause {} in contract {} has no Subject Ref", clause.getName().getValue(), contract.getId()
 208                     .getValue());
 209                 continue;
 210             }
 211             if (contract.getSubject() == null) {
 212                 LOG.warn("Couldn't find in Contract {} the expected subject references", contract.getId().getValue());
 213                 continue;
 214             }
 215             for (SubjectName subjectRef : clause.getSubjectRefs()) {
 216                 LOG.trace("Start Parsing Subject Ref {} in Contract {}", subjectRef, contract.getId().getValue());
 217                 for (Subject sub : contract.getSubject()) {
 218                     if (subjectRef.equals(sub.getName())) {
 219                         SecurityRuleGroupBuilder securityRuleGroupBuilder = new SecurityRuleGroupBuilder();
 220                         securityRuleGroupBuilder.setName(new Name(subjectRef.getValue()));
 221                         List<Rule> subRules = sub.getRule();
 222                         if (subRules == null) {
 223                             LOG.warn("Subject {} in Contract {} doesn't have rules", subjectRef.getValue(),
 224                                     contract.getId().getValue());
 225                         } else {
 226                             List<SecurityRule> securityRules = getSecurityRules(contract, subjectRef, subRules);
 227                             LOG.debug("Subject {} in Contract {} has {} rules", subjectRef.getValue(), contract.getId()
 228                                 .getValue(), securityRules.size());
 229                             securityRuleGroupBuilder.setSecurityRule(securityRules);
 230                         }
 231                         LOG.debug("Added Rule {} to Subject {} in Contract {}", securityRuleGroupBuilder.getName()
 232                             .getValue(), subjectRef.getValue(), contract.getId().getValue());
 233                         securityRuleGroups.add(securityRuleGroupBuilder.build());
 234                     }
 235                 }
 236             }
 237         }
 238         LOG.trace("Done with buildSecurityRuleGroup for contract {}", contract.getId().getValue());
 239         return securityRuleGroups;
 240     }
 241
 242     private List<SecurityRule> getSecurityRules(Contract contract, SubjectName subjectRef, List<Rule> subRules) {
 243         List<SecurityRule> securityRules = new ArrayList<>();
 244         for (Rule rule : subRules) {
 245             List<ClassifierRef> classifierRefs = rule.getClassifierRef();
 246             List<RuleClassifier> pClassifiers = null;
 247             if (classifierRefs == null || classifierRefs.isEmpty()) {
 248                 LOG.warn("Rule {} in Subject {} in Contract {} doesn't have classifiers", rule.getName(), subjectRef,
 249                         contract.getId());
 250             } else {
 251                 pClassifiers = getClassifiers(gbpTenantId, contract, classifierRefs, dataProvider);
 252                 if (pClassifiers == null || pClassifiers.isEmpty()) {
 253                     LOG.warn("Rule {} in Subject {} in Contract {} doesn't have classifiers -- Will ignore this rule",
 254                             rule.getName(), subjectRef, contract.getId());
 255                 }
 256             }
 257             List<ActionRef> actionRefs = rule.getActionRef();
 258             List<RuleAction> pActions = null;
 259             if (actionRefs == null || actionRefs.isEmpty()) {
 260                 LOG.warn("Rule {} in Subject {} in Contract {} doesn't have actions", rule.getName(), subjectRef,
 261                         contract.getId());
 262             } else {
 263                 pActions = getActions(contract, actionRefs);
 264                 if (pActions == null || pActions.isEmpty()) {
 265                     LOG.warn("Rule {} in Subject {} in Contract {} doesn't have actions", rule.getName(), subjectRef,
 266                             contract.getId());
 267                 }
 268             }
 269
 270             securityRules.add(new SecurityRuleBuilder().setName(new Name(rule.getName().getValue()))
 271                 .setOrder(rule.getOrder())
 272                 .setRuleClassifier(pClassifiers)
 273                 .setRuleAction(pActions)
 274                 .build());
 275         } // for rules
 276         return securityRules;
 277     }
 278
 279     private List<RuleAction> getActions(Contract contract, List<ActionRef> actionRefs) {
 280         LOG.trace("Start Parsing Actions for actionRefs count {} in Contract {}", actionRefs.size(), contract.getId()
 281             .getValue());
 282         List<RuleAction> pActions = new ArrayList<>();
 283         for (ActionRef actionRef : actionRefs) {
 284             if (actionRef.getName() == null) {
 285                 LOG.warn("Couldn't find an Action in Contract {} -- ignored Action", contract.getId().getValue());
 286                 continue;
 287             }
 288             RuleActionBuilder ruleActionBuilder = new RuleActionBuilder();
 289             ruleActionBuilder.setName(new Name(actionRef.getName().getValue()));
 290             ruleActionBuilder.setOrder(actionRef.getOrder());
 291             ActionInstance actionInstance = getActionInstance(actionRef.getName());
 292             if (actionInstance == null) {
 293                 LOG.warn("Action instance {} is not found -- will only use the Action ref info", actionRef.getName());
 294             } else {
 295                 if (actionInstance.getActionDefinitionId() != null) {
 296                     ruleActionBuilder.setAdditionalInfo(new Text(actionInstance.getActionDefinitionId().getValue()));
 297                 }
 298                 List<ParameterValue> parms = null;
 299                 if (actionInstance.getParameterValue() != null) {
 300                     LOG.trace("Action Instance {} has {} parameters", actionInstance.getName().getValue(),
 301                             actionInstance.getParameterValue().size());
 302                     parms = new ArrayList<>();
 303                     for (org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.subject.feature.instance.ParameterValue instance : actionInstance.getParameterValue()) {
 304                         ParameterValueBuilder pBuilder = new ParameterValueBuilder();
 305                         pBuilder.setIntValue(instance.getIntValue());
 306                         if (instance.getName() != null) {
 307                             pBuilder.setName(new Name(instance.getName().getValue()));
 308                         }
 309                         pBuilder.setStringValue(instance.getStringValue());
 310                         if (instance.getRangeValue() != null) {
 311                             RangeValueBuilder rBuilder = new RangeValueBuilder().setMax(
 312                                     instance.getRangeValue().getMax()).setMin(instance.getRangeValue().getMin());
 313                             pBuilder.setRangeValue(rBuilder.build());
 314                         }
 315                         ParameterValue parm = pBuilder.build();
 316                         LOG.trace("Added Parm {} from Action Instance {}", parm, actionInstance.getName().getValue());
 317                         parms.add(parm);
 318                     }
 319                 } else {
 320                     LOG.trace("Action Instance {} has no parameters", actionInstance.getName().getValue());
 321                 }
 322                 ruleActionBuilder.setParameterValue(parms);
 323             }
 324             pActions.add(ruleActionBuilder.build());
 325         }
 326
 327         return pActions;
 328     }
 329
 330     private ActionInstance getActionInstance(ActionName name) {
 331         ReadOnlyTransaction trans = dataProvider.newReadOnlyTransaction();
 332         InstanceIdentifier<ActionInstance> ciId = InstanceIdentifier.builder(Tenants.class)
 333             .child(Tenant.class, new TenantKey(gbpTenantId))
 334             .child(Policy.class)
 335             .child(SubjectFeatureInstances.class)
 336             .child(ActionInstance.class, new ActionInstanceKey(name))
 337             .build();
 338         try {
 339             Optional<ActionInstance> data = trans.read(LogicalDatastoreType.CONFIGURATION, ciId).get();
 340             if (data.isPresent()) {
 341                 return data.get();
 342             }
 343         } catch (Exception e) {
 344             LOG.error("Couldn't read Action instance from datastore. Exception: ", e);
 345         }
 346         return null;
 347     }
 348
 349     private List<RuleClassifier> getClassifiers(TenantId tenantId, Contract contract,
 350             List<ClassifierRef> classifierRefs, DataBroker dataProvider) {
 351         List<RuleClassifier> fClassifiers = new ArrayList<>();
 352         for (ClassifierRef classifierRef : classifierRefs) {
 353             if (classifierRef.getName() == null) {
 354                 LOG.warn("Found a Classifer without name in Contract {} ", contract.getId().getValue());
 355                 continue;
 356             }
 357             RuleClassifierBuilder ruleClassifierBuilder = new RuleClassifierBuilder();
 358             ruleClassifierBuilder.setName(new Name(classifierRef.getName().getValue()));
 359             ClassifierInstance classifierInstance = getClassifierInstance(tenantId, classifierRef.getName(),
 360                     dataProvider);
 361             if (classifierInstance == null) {
 362                 LOG.warn("Classifer instance {} is not found -- will only use the classifier Ref info",
 363                         classifierRef.getName());
 364             } else {
 365                 if (classifierInstance.getClassifierDefinitionId() != null) {
 366                     ruleClassifierBuilder.setAdditionalInfo(new Text(classifierInstance.getClassifierDefinitionId()
 367                         .getValue()));
 368                 }
 369                 List<ParameterValue> parms = null;
 370                 if (classifierInstance.getParameterValue() != null) {
 371                     LOG.trace("Calssifier Instance {} has {} parameters", classifierInstance.getName().getValue(),
 372                             classifierInstance.getParameterValue().size());
 373                     parms = new ArrayList<>();
 374                     for (org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.subject.feature.instance.ParameterValue instance : classifierInstance.getParameterValue()) {
 375                         ParameterValueBuilder pBuilder = new ParameterValueBuilder();
 376                         pBuilder.setIntValue(instance.getIntValue());
 377                         pBuilder.setName(new Name(instance.getName().getValue()));
 378                         pBuilder.setStringValue(instance.getStringValue());
 379                         if (instance.getRangeValue() != null) {
 380                             RangeValueBuilder rBuilder = new RangeValueBuilder().setMax(
 381                                     instance.getRangeValue().getMax()).setMin(instance.getRangeValue().getMin());
 382                             pBuilder.setRangeValue(rBuilder.build());
 383                         }
 384                         ParameterValue parm = pBuilder.build();
 385                         LOG.trace("Added parm {} from Classifier Instance {}", parm, classifierInstance.getName()
 386                             .getValue());
 387                         parms.add(parm);
 388                     }
 389                 } else {
 390                     LOG.trace("Classifier Instance {} has no parameters", classifierInstance.getName().getValue());
 391                 }
 392                 ruleClassifierBuilder.setParameterValue(parms);
 393             }
 394             if (classifierRef.getDirection() != null) {
 395                 ruleClassifierBuilder.setDirection(Direction.forValue(classifierRef.getDirection().getIntValue()));
 396             } else {
 397                 ruleClassifierBuilder.setDirection(Direction.Bidirectional);
 398             }
 399             fClassifiers.add(ruleClassifierBuilder.build());
 400         }
 401         return fClassifiers;
 402     }
 403
 404     private ClassifierInstance getClassifierInstance(TenantId tenantId, ClassifierName name, DataBroker dataProvider) {
 405         ReadOnlyTransaction trans = dataProvider.newReadOnlyTransaction();
 406         InstanceIdentifier<ClassifierInstance> ciId = InstanceIdentifier.builder(Tenants.class)
 407             .child(Tenant.class, new TenantKey(tenantId))
 408             .child(Policy.class)
 409             .child(SubjectFeatureInstances.class)
 410             .child(ClassifierInstance.class, new ClassifierInstanceKey(name))
 411             .build();
 412         try {
 413             Optional<ClassifierInstance> data = trans.read(LogicalDatastoreType.CONFIGURATION, ciId).get();
 414             if (data.isPresent()) {
 415                 return data.get();
 416             }
 417         } catch (Exception e) {
 418             LOG.error("Couldn't read Action instance from datastore. Exception: ", e);
 419         }
 420         return null;
 421     }
 422 }