Java tutorial
/* (C) Copyright 2015-2018 The SUPERSEDE Project Consortium 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. */ package eu.supersede.dm; import java.util.ArrayList; import java.util.List; import javax.annotation.PostConstruct; import javax.jms.JMSException; import javax.naming.NamingException; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import eu.supersede.fe.integration.ProxyWrapper; import eu.supersede.fe.multitenant.MultiJpaProvider; import eu.supersede.gr.jpa.ActivitiesJpa; import eu.supersede.gr.jpa.AlertsJpa; import eu.supersede.gr.jpa.AppsJpa; import eu.supersede.gr.jpa.ProcessCriteriaJpa; import eu.supersede.gr.jpa.ProcessMembersJpa; import eu.supersede.gr.jpa.ProcessesJpa; import eu.supersede.gr.jpa.PropertiesJpa; import eu.supersede.gr.jpa.PropertyBagsJpa; import eu.supersede.gr.jpa.ReceivedUserRequestsJpa; import eu.supersede.gr.jpa.RequirementsDependenciesJpa; import eu.supersede.gr.jpa.RequirementsJpa; import eu.supersede.gr.jpa.RequirementsPropertiesJpa; import eu.supersede.gr.jpa.RequirementsRankingsJpa; import eu.supersede.gr.jpa.RequirementsScoresJpa; import eu.supersede.gr.jpa.UsersJpa; import eu.supersede.gr.jpa.ValutationCriteriaJpa; import eu.supersede.gr.model.HAlert; import eu.supersede.gr.model.HApp; import eu.supersede.gr.model.HReceivedUserRequest; import eu.supersede.gr.model.Requirement; import eu.supersede.integration.api.dm.types.Alert; import eu.supersede.integration.api.dm.types.UserRequest; import eu.supersede.integration.api.pubsub.evolution.EvolutionAlertMessageListener; import eu.supersede.integration.api.pubsub.evolution.EvolutionSubscriber; import eu.supersede.integration.api.pubsub.evolution.iEvolutionSubscriber; @Component public class ModuleLoader { @Autowired private UsersJpa jpaUsers; @Autowired private RequirementsJpa jpaRequirements; @Autowired private ValutationCriteriaJpa jpaCriteria; @Autowired private ProcessesJpa jpaProcesses; @Autowired private ProcessMembersJpa jpaMembers; @Autowired private ActivitiesJpa jpaActivities; @Autowired private ProcessCriteriaJpa jpaProcessCriteria; @Autowired private AppsJpa jpaApps; @Autowired private AlertsJpa jpaAlerts; @Autowired private ReceivedUserRequestsJpa jpaReceivedUserRequests; @Autowired private RequirementsPropertiesJpa jpaRequirementProperties; @Autowired private RequirementsDependenciesJpa jpaRequirementDependencies; @Autowired private PropertiesJpa jpaProperties; @Autowired private PropertyBagsJpa jpaPropertyBags; @Autowired private MultiJpaProvider multiJpaProvider; @Autowired private RequirementsRankingsJpa requirementsRankings; @Autowired private RequirementsScoresJpa scores; @Autowired private ProxyWrapper proxy; public ModuleLoader() { } @PostConstruct public void init() { DMGame.JpaProvider jpa = new DMGame.JpaProvider(); jpa.activities = jpaActivities; jpa.criteria = jpaCriteria; jpa.members = jpaMembers; jpa.processes = jpaProcesses; jpa.requirements = jpaRequirements; jpa.users = jpaUsers; jpa.processCriteria = jpaProcessCriteria; jpa.alerts = jpaAlerts; jpa.apps = jpaApps; jpa.receivedUserRequests = jpaReceivedUserRequests; jpa.requirementProperties = jpaRequirementProperties; jpa.requirementDependencies = jpaRequirementDependencies; jpa.properties = jpaProperties; jpa.propertyBags = jpaPropertyBags; jpa.requirementsRankings = requirementsRankings; jpa.scoresJpa = scores; jpa.proxy = proxy; DMGame.init(jpa); new Thread(new Runnable() { @Override public void run() { iEvolutionSubscriber subscriber = null; try { subscriber = new EvolutionSubscriber(); subscriber.openTopicConnection(); EvolutionAlertMessageListener messageListener = subscriber .createEvolutionAlertSubscriptionAndKeepListening(); try { while (true) { if (messageListener.areMessageReceived()) { handleAlert(messageListener.getNextAlert()); } else { Thread.sleep(1000); // FIXME Configure sleeping time } } } catch (InterruptedException e) { e.printStackTrace(); } subscriber.closeSubscription(); subscriber.closeTopicConnection(); } catch (JMSException e) { e.printStackTrace(); } catch (NamingException e1) { e1.printStackTrace(); } finally { if (subscriber != null) { try { subscriber.closeTopicConnection(); } catch (JMSException e) { throw new RuntimeException("Error in closing topic connection", e); } } } } }).start(); } private List<Requirement> getRequirements(Alert alert) { // Either extract from the alert, or make a backward request to WP2 List<Requirement> reqs = new ArrayList<>(); for (UserRequest request : alert.getRequests()) { reqs.add(new Requirement(request.getId() + ": " + request.getDescription(), "")); } return reqs; } public void handleAlert(Alert alert) { System.out.println("Handling alert: " + alert.getId() + ", " + alert.getApplicationId() + ", " + alert.getTenant() + ", " + alert.getTimestamp()); // Override class JPA instances with multitenancy provided AppsJpa multijpaApps = multiJpaProvider.getRepository(AppsJpa.class, alert.getTenant()); AlertsJpa multijpaAlerts = multiJpaProvider.getRepository(AlertsJpa.class, alert.getTenant()); ReceivedUserRequestsJpa multijpaReceivedUserRequests = multiJpaProvider .getRepository(ReceivedUserRequestsJpa.class, alert.getTenant()); RequirementsJpa multijpaRequirements = multiJpaProvider.getRepository(RequirementsJpa.class, alert.getTenant()); if (multijpaApps == null) { System.out.println("Unknown tenant: '" + alert.getTenant() + "'"); return; } List<HApp> apps = multijpaApps.findAll(); HApp app = null; // Temporary workaround because neither findOne() nor findById() find the app for (HApp tmpApp : apps) { System.out.println("Found app: '" + tmpApp.getId() + "'"); if (tmpApp.getId().equals(alert.getApplicationId())) { System.out.println("Found app with id: " + alert.getApplicationId()); app = tmpApp; break; } } // TODO: check whether // HApp app = multijpaApps.findOne(alert.getApplicationId()); if (app == null) { app = new HApp(); app.setId(alert.getApplicationId()); app = multijpaApps.save(app); } HAlert halert = multijpaAlerts.findOne(alert.getId()); if (halert == null) { halert = new HAlert(alert.getId(), alert.getApplicationId(), alert.getTimestamp()); halert = multijpaAlerts.save(halert); } else { System.out.println("Alert " + alert.getId() + " already present, not saving it"); } for (UserRequest request : alert.getRequests()) { HReceivedUserRequest hrur = new HReceivedUserRequest(); hrur.setId(request.getId()); hrur.setAlertId(alert.getId()); hrur.setAccuracy(request.getAccuracy()); hrur.setClassification(request.getClassification().name()); hrur.setDescription(request.getDescription()); hrur.setNegativeSentiment(request.getNegativeSentiment()); hrur.setPositiveSentiment(request.getPositiveSentiment()); hrur.setOverallSentiment(request.getOverallSentiment()); multijpaReceivedUserRequests.save(hrur); } } }