gerrit.onap Code Review - policy/apex-pdp.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2019-2021 Nordix Foundation.
   4  *  Modifications Copyright (C) 2020-2021 Bell Canada. All rights reserved.
   5  * ================================================================================
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  * SPDX-License-Identifier: Apache-2.0
  19  * ============LICENSE_END=========================================================
  20  */
  21
  22 package org.onap.policy.apex.services.onappf.handler;
  23
  24 import java.io.File;
  25 import java.io.IOException;
  26 import java.util.ArrayList;
  27 import java.util.HashMap;
  28 import java.util.HashSet;
  29 import java.util.LinkedHashMap;
  30 import java.util.List;
  31 import java.util.Map;
  32 import java.util.Set;
  33 import java.util.stream.Collectors;
  34 import org.onap.policy.apex.core.engine.EngineParameters;
  35 import org.onap.policy.apex.core.engine.TaskParameters;
  36 import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
  37 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
  38 import org.onap.policy.apex.model.basicmodel.concepts.AxKeyInfo;
  39 import org.onap.policy.apex.model.basicmodel.concepts.AxKeyInformation;
  40 import org.onap.policy.apex.model.basicmodel.service.ModelService;
  41 import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbum;
  42 import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbums;
  43 import org.onap.policy.apex.model.contextmodel.concepts.AxContextSchema;
  44 import org.onap.policy.apex.model.contextmodel.concepts.AxContextSchemas;
  45 import org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel;
  46 import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
  47 import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
  48 import org.onap.policy.apex.model.policymodel.concepts.AxPolicies;
  49 import org.onap.policy.apex.model.policymodel.concepts.AxPolicy;
  50 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
  51 import org.onap.policy.apex.model.policymodel.concepts.AxTask;
  52 import org.onap.policy.apex.model.policymodel.concepts.AxTasks;
  53 import org.onap.policy.apex.service.engine.main.ApexMain;
  54 import org.onap.policy.apex.service.parameters.ApexParameterConstants;
  55 import org.onap.policy.apex.service.parameters.ApexParameters;
  56 import org.onap.policy.apex.services.onappf.exception.ApexStarterException;
  57 import org.onap.policy.common.parameters.ParameterService;
  58 import org.onap.policy.common.utils.coder.CoderException;
  59 import org.onap.policy.common.utils.coder.StandardCoder;
  60 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
  61 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
  62 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
  63 import org.onap.policy.models.tosca.authorative.concepts.ToscaTopologyTemplate;
  64 import org.slf4j.Logger;
  65 import org.slf4j.LoggerFactory;
  66
  67 /**
  68  * This class instantiates the Apex Engine based on instruction from PAP.
  69  *
  70  * @author Ajith Sreekumar (ajith.sreekumar@est.tech)
  71  */
  72 public class ApexEngineHandler {
  73
  74     private static final Logger LOGGER = LoggerFactory.getLogger(ApexEngineHandler.class);
  75
  76     private Map<ToscaConceptIdentifier, ApexMain> apexMainMap = new LinkedHashMap<>();
  77
  78     /**
  79      * Constructs the object. Extracts the config and model files from each policy and instantiates the apex engine.
  80      *
  81      * @param policies the list of policies
  82      * @throws ApexStarterException if the apex engine instantiation failed using the policies passed
  83      */
  84     public ApexEngineHandler(List<ToscaPolicy> policies) throws ApexStarterException {
  85         LOGGER.debug("Starting apex engine.");
  86         initiateApexEngineForPolicies(policies);
  87     }
  88
  89     /**
  90      * Updates the Apex Engine with the policy model created from new list of policies.
  91      *
  92      * @param policies the list of policies
  93      * @throws ApexStarterException if the apex engine instantiation failed using the policies passed
  94      */
  95     public void updateApexEngine(List<ToscaPolicy> policies) throws ApexStarterException {
  96         List<ToscaConceptIdentifier> runningPolicies = getRunningPolicies();
  97         List<ToscaPolicy> policiesToDeploy = policies.stream()
  98             .filter(policy -> !runningPolicies.contains(policy.getIdentifier())).collect(Collectors.toList());
  99         List<ToscaConceptIdentifier> policiesToUnDeploy = runningPolicies.stream()
 100             .filter(polId -> policies.stream().noneMatch(policy -> policy.getIdentifier().equals(polId)))
 101             .collect(Collectors.toList());
 102         Map<ToscaConceptIdentifier, ApexMain> undeployedPoliciesMainMap = new LinkedHashMap<>();
 103         policiesToUnDeploy.forEach(policyId -> {
 104             ApexMain apexMain = apexMainMap.get(policyId);
 105             try {
 106                 apexMain.shutdown();
 107                 undeployedPoliciesMainMap.put(policyId, apexMain);
 108                 apexMainMap.remove(policyId);
 109             } catch (ApexException e) {
 110                 LOGGER.error("Shutting down policy {} failed", policyId, e);
 111             }
 112         });
 113         if (!undeployedPoliciesMainMap.isEmpty()) {
 114             updateModelAndParameterServices(undeployedPoliciesMainMap);
 115         }
 116         if (!policiesToDeploy.isEmpty()) {
 117             initiateApexEngineForPolicies(policiesToDeploy);
 118         }
 119         if (apexMainMap.isEmpty()) {
 120             ModelService.clear();
 121             ParameterService.clear();
 122         }
 123     }
 124
 125     /**
 126      * Clear the corresponding items from ModelService and ParameterService.
 127      *
 128      * @param undeployedPoliciesMainMap the policies that are undeployed
 129      */
 130     private void updateModelAndParameterServices(Map<ToscaConceptIdentifier, ApexMain> undeployedPoliciesMainMap) {
 131         Set<String> inputParamKeysToRetain = new HashSet<>();
 132         Set<String> outputParamKeysToRetain = new HashSet<>();
 133         List<TaskParameters> taskParametersToRetain = new ArrayList<>();
 134         List<String> executorParamKeysToRetain = new ArrayList<>();
 135         List<String> schemaParamKeysToRetain = new ArrayList<>();
 136
 137         Map<AxArtifactKey, AxKeyInfo> keyInfoMapToRetain = new HashMap<>();
 138         Map<AxArtifactKey, AxContextSchema> schemaMapToRetain = new HashMap<>();
 139         Map<AxArtifactKey, AxEvent> eventMapToRetain = new HashMap<>();
 140         Map<AxArtifactKey, AxContextAlbum> albumMapToRetain = new HashMap<>();
 141         Map<AxArtifactKey, AxTask> taskMapToRetain = new HashMap<>();
 142         Map<AxArtifactKey, AxPolicy> policyMapToRetain = new HashMap<>();
 143
 144         apexMainMap.values().forEach(main -> {
 145             inputParamKeysToRetain.addAll(main.getApexParameters().getEventInputParameters().keySet());
 146             outputParamKeysToRetain.addAll(main.getApexParameters().getEventOutputParameters().keySet());
 147             taskParametersToRetain.addAll(
 148                 main.getApexParameters().getEngineServiceParameters().getEngineParameters().getTaskParameters());
 149             executorParamKeysToRetain.addAll(main.getApexParameters().getEngineServiceParameters().getEngineParameters()
 150                 .getExecutorParameterMap().keySet());
 151             schemaParamKeysToRetain.addAll(main.getApexParameters().getEngineServiceParameters().getEngineParameters()
 152                 .getContextParameters().getSchemaParameters().getSchemaHelperParameterMap().keySet());
 153
 154             AxPolicyModel policyModel = main.getActivator().getPolicyModel();
 155             keyInfoMapToRetain.putAll(policyModel.getKeyInformation().getKeyInfoMap());
 156             schemaMapToRetain.putAll(policyModel.getSchemas().getSchemasMap());
 157             eventMapToRetain.putAll(policyModel.getEvents().getEventMap());
 158             albumMapToRetain.putAll(policyModel.getAlbums().getAlbumsMap());
 159             taskMapToRetain.putAll(policyModel.getTasks().getTaskMap());
 160             policyMapToRetain.putAll(policyModel.getPolicies().getPolicyMap());
 161         });
 162         for (ApexMain main : undeployedPoliciesMainMap.values()) {
 163             if (null != main.getApexParameters()) {
 164                 handleParametersRemoval(inputParamKeysToRetain, outputParamKeysToRetain, taskParametersToRetain,
 165                     executorParamKeysToRetain, schemaParamKeysToRetain, main);
 166             }
 167             if (null != main.getActivator() && null != main.getActivator().getPolicyModel()) {
 168                 handleAxConceptsRemoval(keyInfoMapToRetain, schemaMapToRetain, eventMapToRetain, albumMapToRetain,
 169                     taskMapToRetain, policyMapToRetain, main);
 170             }
 171         }
 172     }
 173
 174     private void handleParametersRemoval(Set<String> inputParamKeysToRetain, Set<String> outputParamKeysToRetain,
 175         List<TaskParameters> taskParametersToRetain, List<String> executorParamKeysToRetain,
 176         List<String> schemaParamKeysToRetain, ApexMain main) {
 177         ApexParameters existingParameters = ParameterService.get(ApexParameterConstants.MAIN_GROUP_NAME);
 178         List<String> eventInputParamKeysToRemove = main.getApexParameters().getEventInputParameters().keySet().stream()
 179             .filter(key -> !inputParamKeysToRetain.contains(key)).collect(Collectors.toList());
 180         List<String> eventOutputParamKeysToRemove = main.getApexParameters().getEventOutputParameters().keySet()
 181             .stream().filter(key -> !outputParamKeysToRetain.contains(key)).collect(Collectors.toList());
 182         eventInputParamKeysToRemove.forEach(existingParameters.getEventInputParameters()::remove);
 183         eventOutputParamKeysToRemove.forEach(existingParameters.getEventOutputParameters()::remove);
 184         EngineParameters engineParameters = main.getApexParameters().getEngineServiceParameters().getEngineParameters();
 185         final List<TaskParameters> taskParametersToRemove = engineParameters.getTaskParameters().stream()
 186             .filter(taskParameter -> !taskParametersToRetain.contains(taskParameter)).collect(Collectors.toList());
 187         final List<String> executorParamKeysToRemove = engineParameters.getExecutorParameterMap().keySet().stream()
 188             .filter(key -> !executorParamKeysToRetain.contains(key)).collect(Collectors.toList());
 189         final List<String> schemaParamKeysToRemove =
 190             engineParameters.getContextParameters().getSchemaParameters().getSchemaHelperParameterMap().keySet()
 191                 .stream().filter(key -> !schemaParamKeysToRetain.contains(key)).collect(Collectors.toList());
 192         EngineParameters aggregatedEngineParameters =
 193             existingParameters.getEngineServiceParameters().getEngineParameters();
 194         aggregatedEngineParameters.getTaskParameters().removeAll(taskParametersToRemove);
 195         executorParamKeysToRemove.forEach(aggregatedEngineParameters.getExecutorParameterMap()::remove);
 196         schemaParamKeysToRemove.forEach(aggregatedEngineParameters.getContextParameters().getSchemaParameters()
 197             .getSchemaHelperParameterMap()::remove);
 198     }
 199
 200     private void handleAxConceptsRemoval(Map<AxArtifactKey, AxKeyInfo> keyInfoMapToRetain,
 201         Map<AxArtifactKey, AxContextSchema> schemaMapToRetain, Map<AxArtifactKey, AxEvent> eventMapToRetain,
 202         Map<AxArtifactKey, AxContextAlbum> albumMapToRetain, Map<AxArtifactKey, AxTask> taskMapToRetain,
 203         Map<AxArtifactKey, AxPolicy> policyMapToRetain, ApexMain main) {
 204         final AxPolicyModel policyModel = main.getActivator().getPolicyModel();
 205         final List<AxArtifactKey> keyInfoKeystoRemove = policyModel.getKeyInformation().getKeyInfoMap().keySet()
 206             .stream().filter(key -> !keyInfoMapToRetain.containsKey(key)).collect(Collectors.toList());
 207         final List<AxArtifactKey> schemaKeystoRemove = policyModel.getSchemas().getSchemasMap().keySet().stream()
 208             .filter(key -> !schemaMapToRetain.containsKey(key)).collect(Collectors.toList());
 209         final List<AxArtifactKey> eventKeystoRemove = policyModel.getEvents().getEventMap().keySet().stream()
 210             .filter(key -> !eventMapToRetain.containsKey(key)).collect(Collectors.toList());
 211         final List<AxArtifactKey> albumKeystoRemove = policyModel.getAlbums().getAlbumsMap().keySet().stream()
 212             .filter(key -> !albumMapToRetain.containsKey(key)).collect(Collectors.toList());
 213         final List<AxArtifactKey> taskKeystoRemove = policyModel.getTasks().getTaskMap().keySet().stream()
 214             .filter(key -> !taskMapToRetain.containsKey(key)).collect(Collectors.toList());
 215         final List<AxArtifactKey> policyKeystoRemove = policyModel.getPolicies().getPolicyMap().keySet().stream()
 216             .filter(key -> !policyMapToRetain.containsKey(key)).collect(Collectors.toList());
 217
 218         final Map<AxArtifactKey, AxKeyInfo> keyInfoMap = ModelService.getModel(AxKeyInformation.class).getKeyInfoMap();
 219         final Map<AxArtifactKey, AxContextSchema> schemasMap =
 220             ModelService.getModel(AxContextSchemas.class).getSchemasMap();
 221         final Map<AxArtifactKey, AxEvent> eventMap = ModelService.getModel(AxEvents.class).getEventMap();
 222         final Map<AxArtifactKey, AxContextAlbum> albumsMap =
 223             ModelService.getModel(AxContextAlbums.class).getAlbumsMap();
 224         final Map<AxArtifactKey, AxTask> taskMap = ModelService.getModel(AxTasks.class).getTaskMap();
 225         final Map<AxArtifactKey, AxPolicy> policyMap = ModelService.getModel(AxPolicies.class).getPolicyMap();
 226
 227         // replace the ModelService with the right concept definition
 228         // this can get corrupted in case of deploying policies with duplicate concept keys
 229         keyInfoMap.putAll(keyInfoMapToRetain);
 230         schemasMap.putAll(schemaMapToRetain);
 231         eventMap.putAll(eventMapToRetain);
 232         albumsMap.putAll(albumMapToRetain);
 233         taskMap.putAll(taskMapToRetain);
 234         policyMap.putAll(policyMapToRetain);
 235
 236         keyInfoKeystoRemove.forEach(keyInfoMap::remove);
 237         schemaKeystoRemove.forEach(schemasMap::remove);
 238         eventKeystoRemove.forEach(eventMap::remove);
 239         albumKeystoRemove.forEach(albumsMap::remove);
 240         taskKeystoRemove.forEach(taskMap::remove);
 241         policyKeystoRemove.forEach(policyMap::remove);
 242     }
 243
 244     private void initiateApexEngineForPolicies(List<ToscaPolicy> policies)
 245         throws ApexStarterException {
 246         Map<ToscaConceptIdentifier, ApexMain> failedPoliciesMainMap = new LinkedHashMap<>();
 247         for (ToscaPolicy policy : policies) {
 248             String policyName = policy.getIdentifier().getName();
 249             final StandardCoder standardCoder = new StandardCoder();
 250             ToscaServiceTemplate toscaServiceTemplate = new ToscaServiceTemplate();
 251             ToscaTopologyTemplate toscaTopologyTemplate = new ToscaTopologyTemplate();
 252             toscaTopologyTemplate.setPolicies(List.of(Map.of(policyName, policy)));
 253             toscaServiceTemplate.setToscaTopologyTemplate(toscaTopologyTemplate);
 254             File file;
 255             try {
 256                 file = File.createTempFile(policyName, ".json");
 257                 standardCoder.encode(file, toscaServiceTemplate);
 258             } catch (CoderException | IOException e) {
 259                 throw new ApexStarterException(e);
 260             }
 261             final String[] apexArgs = {"-p", file.getAbsolutePath()};
 262             LOGGER.info("Starting apex engine for policy {}", policy.getIdentifier());
 263             ApexMain apexMain = new ApexMain(apexArgs);
 264             if (apexMain.isAlive()) {
 265                 apexMainMap.put(policy.getIdentifier(), apexMain);
 266             } else {
 267                 failedPoliciesMainMap.put(policy.getIdentifier(), apexMain);
 268                 LOGGER.error("Execution of policy {} failed", policy.getIdentifier());
 269             }
 270         }
 271         if (apexMainMap.isEmpty()) {
 272             ModelService.clear();
 273             ParameterService.clear();
 274             throw new ApexStarterException("Apex Engine failed to start.");
 275         } else if (failedPoliciesMainMap.size() > 0) {
 276             updateModelAndParameterServices(failedPoliciesMainMap);
 277             if (failedPoliciesMainMap.size() == policies.size()) {
 278                 throw new ApexStarterException("Updating the APEX engine with new policies failed.");
 279             }
 280         }
 281     }
 282
 283     /**
 284      * Method to get the APEX engine statistics.
 285      */
 286     public List<AxEngineModel> getEngineStats() {
 287         // engineStats from all the apexMain instances running individual tosca policies are combined here.
 288         return apexMainMap.values().stream().filter(apexMain -> (null != apexMain && apexMain.isAlive()))
 289             .flatMap(m -> m.getEngineStats().stream()).collect(Collectors.toList());
 290     }
 291
 292     /**
 293      * Method to check whether the apex engine is running or not.
 294      */
 295     public boolean isApexEngineRunning() {
 296         return apexMainMap.values().stream().anyMatch(apexMain -> (null != apexMain && apexMain.isAlive()));
 297     }
 298
 299     /**
 300      * Method that return the list of running policies in the apex engine.
 301      */
 302     public List<ToscaConceptIdentifier> getRunningPolicies() {
 303         return new ArrayList<>(apexMainMap.keySet());
 304     }
 305
 306     /**
 307      * Method to shut down the apex engine.
 308      */
 309     public void shutdown() throws ApexStarterException {
 310         try {
 311             LOGGER.debug("Shutting down apex engine.");
 312             for (ApexMain apexMain : apexMainMap.values()) {
 313                 apexMain.shutdown();
 314             }
 315             apexMainMap.clear();
 316             ModelService.clear();
 317             ParameterService.clear();
 318         } catch (final ApexException e) {
 319             throw new ApexStarterException(e);
 320         }
 321     }
 322 }