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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.service;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.hibernate.Session;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.transaction.TransactionStatus;
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import com.vaadin.spring.annotation.SpringComponent;
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import com.vaadin.spring.annotation.ViewScope;
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import com.vaadin.ui.Notification;
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import com.vaadin.ui.UI;
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import eu.etaxonomy.cdm.api.application.CdmRepository;
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import eu.etaxonomy.cdm.api.service.DeleteResult;
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import eu.etaxonomy.cdm.api.service.IService;
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import eu.etaxonomy.cdm.model.agent.AgentBase;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.IdentifiableEntity;
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import eu.etaxonomy.cdm.model.name.NameTypeDesignation;
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import eu.etaxonomy.cdm.model.name.Registration;
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import eu.etaxonomy.cdm.model.name.TaxonName;
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import eu.etaxonomy.cdm.model.occurrence.Collection;
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import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
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import eu.etaxonomy.cdm.model.reference.Reference;
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import eu.etaxonomy.cdm.vaadin.event.EntityChangeEvent;
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import eu.etaxonomy.cdm.vaadin.event.EntityChangeEvent.Type;
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import eu.etaxonomy.vaadin.mvp.AbstractView;
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/**
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* @author a.kohlbecker
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* @since Jun 26, 2017
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*
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* TODO better naming of this class, ServiceWrapper, ServiceOperator, ...?
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*
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*/
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@SpringComponent
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@ViewScope
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public class CdmStore {
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private final static Logger logger = LogManager.getLogger();
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@Autowired
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@Qualifier("cdmRepository")
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private CdmRepository repo;
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protected String _toString() {
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return this.getClass().getSimpleName() + "@" + this.hashCode();
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}
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/**
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*
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* @param bean
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*
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* @return the merged bean, this bean is <b>not reloaded</b> from the
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* persistent storage.
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*/
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public <T extends CdmBase> EntityChangeEvent saveBean(T bean, AbstractView view) {
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Type changeEventType;
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if(bean.isPersited()){
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changeEventType = Type.MODIFIED;
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} else {
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changeEventType = Type.CREATED;
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}
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try{
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TransactionStatus txStatus = repo.startTransaction();
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Session session = repo.getSession();
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try {
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logger.trace(this._toString() + ".onEditorSaveEvent - merging bean into session");
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// merge the changes into the session, ...
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if (session.contains(bean)) {
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// evict bean before merge to avoid duplicate beans in same session
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logger.trace(this._toString() + ".mergedBean() - evict " + bean.toString());
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session.evict(bean);
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}
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logger.trace(this._toString() + ".mergedBean() - doing merge of" + bean.toString());
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@SuppressWarnings("unchecked")
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T mergedBean = (T) session.merge(bean);
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repo.commitTransaction(txStatus);
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return new EntityChangeEvent(mergedBean, changeEventType, view);
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} catch(Exception e){
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transactionRollbackIfNotCompleted(txStatus);
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throw e;
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}
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} finally {
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repo.clearSession(); // #7559
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}
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}
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/**
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* @param txStatus
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*/
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public void transactionRollbackIfNotCompleted(TransactionStatus txStatus) {
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if(!txStatus.isCompleted()){
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repo.getTransactionManager().rollback(txStatus);
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}
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}
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/**
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*
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* @param bean
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* @return a EntityChangeEvent in case the deletion was successful otherwise <code>null</code>.
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*/
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public final <T extends CdmBase> EntityChangeEvent deleteBean(T bean, AbstractView view) {
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IService<T> typeSpecificService = serviceFor(bean);
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try{
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logger.trace(this._toString() + ".deleteBean - deleting" + bean.toString());
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DeleteResult result = typeSpecificService.delete(bean);
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if (result.isOk()) {
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return new EntityChangeEvent(bean, Type.REMOVED, view);
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} else {
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handleDeleteresultInError(result);
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}
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} finally {
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repo.clearSession(); // #7559
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}
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return null;
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}
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/**
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* @param result
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*/
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public static void handleDeleteresultInError(DeleteResult result) {
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String notificationTitle;
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StringBuffer messageBody = new StringBuffer();
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if (result.isAbort()) {
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notificationTitle = "The delete operation as abborded by the system.";
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} else {
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notificationTitle = "An error occured during the delete operation.";
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}
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if (!result.getExceptions().isEmpty()) {
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messageBody.append("<h3>").append("Exceptions:").append("</h3>").append("<ul>");
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result.getExceptions().forEach(e -> messageBody.append("<li>").append(e.getMessage()).append("</li>"));
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messageBody.append("</ul>");
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}
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if (!result.getRelatedObjects().isEmpty()) {
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messageBody.append("<h3>").append("Related objects exist:").append("</h3>").append("<ul>");
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result.getRelatedObjects().forEach(e -> {
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messageBody.append("<li>");
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if (IdentifiableEntity.class.isAssignableFrom(e.getClass())) {
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messageBody.append(((IdentifiableEntity) e).getTitleCache());
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} else {
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messageBody.append(e.toString());
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}
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messageBody.append("</li>");
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});
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messageBody.append("</ul>");
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}
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Notification notification = new Notification(notificationTitle, messageBody.toString(),
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com.vaadin.ui.Notification.Type.ERROR_MESSAGE, true);
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notification.show(UI.getCurrent().getPage());
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}
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@SuppressWarnings("unchecked")
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protected <T extends CdmBase> IService<T> serviceFor(T bean){
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Class<? extends CdmBase> cdmType = bean.getClass();
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if(Registration.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getRegistrationService();
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} else if(TaxonName.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getNameService();
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} else if(Reference.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getReferenceService();
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} else if (NameTypeDesignation.class.isAssignableFrom(cdmType)){
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throw new RuntimeException("no generic sercvice for NameTypeDesignation, use dedicated methods of NameService");
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} else if (SpecimenOrObservationBase.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getOccurrenceService();
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} else if (AgentBase.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getAgentService();
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} else if (Collection.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getCollectionService();
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} else if (Collection.class.isAssignableFrom(cdmType)){
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return (IService<T>) repo.getCollectionService();
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} else {
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throw new RuntimeException("Implementation to find service for " + cdmType + " still missing.");
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}
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}
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}
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