com.samples.platform.serviceprovider.library.internal.dao.PlatformDao.java Source code

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Here is the source code for com.samples.platform.serviceprovider.library.internal.dao.PlatformDao.java

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/*******************************************************************************
 * Copyright (c) 2013 - 2016 QPark Consulting  S.a r.l.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0.
 * The Eclipse Public License is available at
 * http://www.eclipse.org/legal/epl-v10.html.
 ******************************************************************************/
package com.samples.platform.serviceprovider.library.internal.dao;

import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.qpark.eip.model.common.EntityType_;
import com.samples.platform.model.library.BookType;
import com.samples.platform.model.library.BookType_;
import com.samples.platform.persistenceconfig.PersistenceConfig;

/**
 * @author bhausen
 */
@Repository
public class PlatformDao {
    /** The {@link Logger}. */
    private final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(PlatformDao.class);
    /** The {@link EntityManager}. */
    @PersistenceContext(unitName = PersistenceConfig.PERSISTENCE_UNIT_NAME, name = PersistenceConfig.ENTITY_MANAGER_FACTORY_NAME)
    private EntityManager em;

    /**
     * @param value
     *            the {@link BookType} to create.
     * @return the created {@link BookType}.
     */
    @Transactional(value = PersistenceConfig.TRANSACTION_MANAGER_NAME, propagation = Propagation.REQUIRED)
    public BookType createBook(final BookType value) {
        if (value != null) {
            try {
                this.em.persist(value);
                this.logger.debug("createBook id=" + value.getUUID());
            } catch (RuntimeException e) {
                e.printStackTrace();
                throw e;
            }
            return value;
        } else {
            this.logger.debug("createBook: value is null.");
            return null;
        }
    }

    /**
     * @param value
     *            the id of the book to delete.
     */
    @Transactional(value = PersistenceConfig.TRANSACTION_MANAGER_NAME, propagation = Propagation.REQUIRED)
    public void deleteBook(final BookType value) {
        if (value != null) {
            try {
                this.logger.debug("deleteBook id=" + value.getUUID());
                this.em.remove(value);
            } catch (RuntimeException e) {
                e.printStackTrace();
                throw e;
            }
        } else {
            this.logger.debug("deleteBook: value not found to delete it.");
        }
    }

    /**
     * @param ISBN
     *            the ISBN of the book to find.
     * @return the {@link BookType}.
     */
    @Transactional(value = PersistenceConfig.TRANSACTION_MANAGER_NAME, propagation = Propagation.REQUIRED)
    public BookType getBookByISBN(final String ISBN) {
        BookType m = null;
        if (ISBN == null) {
            this.logger.debug("getBookByISBN: ISBN is null.");
        } else {
            CriteriaBuilder cb = this.em.getCriteriaBuilder();
            CriteriaQuery<BookType> q = cb.createQuery(BookType.class);
            Root<BookType> c = q.from(BookType.class);
            q.where(cb.equal(c.<String>get(BookType_.ISBN), ISBN));
            TypedQuery<BookType> typedQuery = this.em.createQuery(q);
            try {
                m = typedQuery.getSingleResult();
                this.logger.debug("getBookByISBN: " + ToStringBuilder.reflectionToString(m));
            } catch (NoResultException e) {
                this.logger.debug("getBookByISBN: non value found for ISBN=" + ISBN);
                m = null;
            }
        }
        return m;
    }

    /**
     * @param uuid
     *            the id of the book to find.
     * @return the {@link BookType}.
     */
    @Transactional(value = PersistenceConfig.TRANSACTION_MANAGER_NAME, propagation = Propagation.REQUIRED)
    public BookType getBookById(final String uuid) {
        BookType m = null;
        if (uuid == null) {
            this.logger.debug("getBookById: UUID is null.");
        } else {
            CriteriaBuilder cb = this.em.getCriteriaBuilder();
            CriteriaQuery<BookType> q = cb.createQuery(BookType.class);
            Root<BookType> c = q.from(BookType.class);
            q.where(cb.equal(c.<String>get(EntityType_.UUID), uuid));
            TypedQuery<BookType> typedQuery = this.em.createQuery(q);
            try {
                m = typedQuery.getSingleResult();
                this.logger.debug("getBookByISBN: " + ToStringBuilder.reflectionToString(m));
            } catch (NoResultException e) {
                this.logger.debug("getBookByISBN: non value found for id=" + uuid);
                m = null;
            }
        }
        return m;
    }

    /**
     * @param value
     *            the {@link BookType} to save.
     * @return the created {@link BookType}.
     */
    @Transactional(value = PersistenceConfig.TRANSACTION_MANAGER_NAME, propagation = Propagation.REQUIRED)
    public BookType saveBook(final BookType value) {
        if (value != null) {
            try {
                this.em.merge(value);
                this.logger.debug("saveBook id=" + value.getUUID());
            } catch (RuntimeException e) {
                e.printStackTrace();
                throw e;
            }
            return value;
        } else {
            this.logger.debug("saveBook: value is null.");
            return null;
        }
    }
}