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Arun Gupta
committed
New sample for optimistic concurrency locking
Former-commit-id: f5c0201a1dd3eefb04222ce4e7e38b35b772df0c
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‎samples/jpa/locking-optimistic/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<artifactId>jpa</artifactId>
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<groupId>org.sample</groupId>
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<version>1.0-SNAPSHOT</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<groupId>org.glassfish.samples</groupId>
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<artifactId>locking-optimistic</artifactId>
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<version>1.0-SNAPSHOT</version>
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<packaging>war</packaging>
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<name>locking-optimistic</name>
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</project>

‎samples/jpa/locking-optimistic/src/main/java/org/glassfish/samples/locking/optimistic/Movie.java‎

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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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*
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common Development
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* and Distribution License("CDDL") (collectively, the "License"). You
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* may not use this file except in compliance with the License. You can
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* obtain a copy of the License at
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* or packager/legal/LICENSE.txt. See the License for the specific
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* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each
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* file and include the License file at packager/legal/LICENSE.txt.
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*
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* GPL Classpath Exception:
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* Oracle designates this particular file as subject to the "Classpath"
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* exception as provided by Oracle in the GPL Version 2 section of the License
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* file that accompanied this code.
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*
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* Modifications:
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* If applicable, add the following below the License Header, with the fields
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* enclosed by brackets [] replaced by your own identifying information:
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* "Portions Copyright [year] [name of copyright owner]"
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*
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* Contributor(s):
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* If you wish your version of this file to be governed by only the CDDL or
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
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* elects to include this software in this distribution under the [CDDL or GPL
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* Version 2] license." If you don't indicate a single choice of license, a
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* recipient has the option to distribute your version of this file under
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* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* its licensees as provided above. However, if you add GPL Version 2 code
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* and therefore, elected the GPL Version 2 license, then the option applies
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* only if the new code is made subject to such option by the copyright
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* holder.
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*/
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package org.glassfish.samples.locking.optimistic;
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import java.io.Serializable;
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import javax.persistence.Entity;
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import javax.persistence.Id;
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import javax.persistence.NamedQueries;
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import javax.persistence.NamedQuery;
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import javax.persistence.Table;
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import javax.persistence.Version;
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import javax.validation.constraints.NotNull;
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import javax.validation.constraints.Size;
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import javax.xml.bind.annotation.XmlRootElement;
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/**
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* @author Arun Gupta
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*/
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@Entity
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@Table(name = "MOVIE_LOCKING")
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@XmlRootElement
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@NamedQueries({
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@NamedQuery(name = "Movie.findAll", query = "SELECT m FROM Movie m"),
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@NamedQuery(name = "Movie.findById", query = "SELECT m FROM Movie m WHERE m.id = :id"),
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@NamedQuery(name = "Movie.findByName", query = "SELECT m FROM Movie m WHERE m.name = :name"),
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@NamedQuery(name = "Movie.findByActors", query = "SELECT m FROM Movie m WHERE m.actors = :actors")})
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public class Movie implements Serializable {
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private static final long serialVersionUID = 1L;
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@Id
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@NotNull
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private Integer id;
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@Version int version;
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@NotNull
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@Size(min = 1, max = 50)
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private String name;
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@NotNull
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@Size(min = 1, max = 200)
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private String actors;
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public Movie() {
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}
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public Movie(Integer id) {
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this.id = id;
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}
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public Movie(Integer id, String name, String actors) {
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this.id = id;
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this.name = name;
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this.actors = actors;
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}
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getActors() {
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return actors;
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}
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public void setActors(String actors) {
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this.actors = actors;
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}
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public int getVersion() {
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return version;
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}
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public void setVersion(int version) {
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this.version = version;
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}
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@Override
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public String toString() {
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return name;
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}
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}

‎samples/jpa/locking-optimistic/src/main/java/org/glassfish/samples/locking/optimistic/MovieBean.java‎

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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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*
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common Development
8+
* and Distribution License("CDDL") (collectively, the "License"). You
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* may not use this file except in compliance with the License. You can
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* obtain a copy of the License at
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* or packager/legal/LICENSE.txt. See the License for the specific
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* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each
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* file and include the License file at packager/legal/LICENSE.txt.
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*
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* GPL Classpath Exception:
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* Oracle designates this particular file as subject to the "Classpath"
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* exception as provided by Oracle in the GPL Version 2 section of the License
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* file that accompanied this code.
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*
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* Modifications:
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* If applicable, add the following below the License Header, with the fields
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* enclosed by brackets [] replaced by your own identifying information:
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* "Portions Copyright [year] [name of copyright owner]"
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*
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* Contributor(s):
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* If you wish your version of this file to be governed by only the CDDL or
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
31+
* elects to include this software in this distribution under the [CDDL or GPL
32+
* Version 2] license." If you don't indicate a single choice of license, a
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* recipient has the option to distribute your version of this file under
34+
* either the CDDL, the GPL Version 2 or to extend the choice of license to
35+
* its licensees as provided above. However, if you add GPL Version 2 code
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* and therefore, elected the GPL Version 2 license, then the option applies
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* only if the new code is made subject to such option by the copyright
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* holder.
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*/
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package org.glassfish.samples.locking.optimistic;
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import java.util.List;
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import javax.ejb.Stateless;
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import javax.persistence.EntityManager;
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import javax.persistence.PersistenceContext;
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import javax.persistence.Query;
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import javax.persistence.TypedQuery;
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import javax.persistence.criteria.CriteriaBuilder;
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import javax.persistence.criteria.CriteriaDelete;
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import javax.persistence.criteria.CriteriaQuery;
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import javax.persistence.criteria.CriteriaUpdate;
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import javax.persistence.criteria.Root;
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/**
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* @author Arun Gupta
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*/
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@Stateless
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public class MovieBean {
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@PersistenceContext
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EntityManager em;
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public List<Movie> listMovies() {
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CriteriaBuilder builder = em.getCriteriaBuilder();
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CriteriaQuery listCriteria = builder.createQuery(Movie.class);
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Root<Movie> listRoot = listCriteria.from(Movie.class);
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listCriteria.select(listRoot);
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TypedQuery<Movie> query = em.createQuery(listCriteria);
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return query.getResultList();
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}
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public void updateMovie() {
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CriteriaBuilder builder = em.getCriteriaBuilder();
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CriteriaUpdate updateCriteria = builder.createCriteriaUpdate(Movie.class);
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Root<Movie> updateRoot = updateCriteria.from(Movie.class);
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updateCriteria.where(builder.equal(updateRoot.get(Movie_.name), "Inception"));
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updateCriteria.set(updateRoot.get(Movie_.name), "INCEPTION");
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Query q = em.createQuery(updateCriteria);
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q.executeUpdate();
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em.flush();
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}
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public void deleteMovie() {
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CriteriaBuilder builder = em.getCriteriaBuilder();
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CriteriaDelete deleteCriteria = builder.createCriteriaDelete(Movie.class);
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Root<Movie> updateRoot = deleteCriteria.from(Movie.class);
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deleteCriteria.where(builder.equal(updateRoot.get(Movie_.name), "The Matrix"));
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Query q = em.createQuery(deleteCriteria);
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q.executeUpdate();
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em.flush();
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}
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}

‎samples/jpa/locking-optimistic/src/main/java/org/glassfish/samples/locking/optimistic/Movie_.java‎

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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
5+
*
6+
* The contents of this file are subject to the terms of either the GNU
7+
* General Public License Version 2 only ("GPL") or the Common Development
8+
* and Distribution License("CDDL") (collectively, the "License"). You
9+
* may not use this file except in compliance with the License. You can
10+
* obtain a copy of the License at
11+
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
12+
* or packager/legal/LICENSE.txt. See the License for the specific
13+
* language governing permissions and limitations under the License.
14+
*
15+
* When distributing the software, include this License Header Notice in each
16+
* file and include the License file at packager/legal/LICENSE.txt.
17+
*
18+
* GPL Classpath Exception:
19+
* Oracle designates this particular file as subject to the "Classpath"
20+
* exception as provided by Oracle in the GPL Version 2 section of the License
21+
* file that accompanied this code.
22+
*
23+
* Modifications:
24+
* If applicable, add the following below the License Header, with the fields
25+
* enclosed by brackets [] replaced by your own identifying information:
26+
* "Portions Copyright [year] [name of copyright owner]"
27+
*
28+
* Contributor(s):
29+
* If you wish your version of this file to be governed by only the CDDL or
30+
* only the GPL Version 2, indicate your decision by adding "[Contributor]
31+
* elects to include this software in this distribution under the [CDDL or GPL
32+
* Version 2] license." If you don't indicate a single choice of license, a
33+
* recipient has the option to distribute your version of this file under
34+
* either the CDDL, the GPL Version 2 or to extend the choice of license to
35+
* its licensees as provided above. However, if you add GPL Version 2 code
36+
* and therefore, elected the GPL Version 2 license, then the option applies
37+
* only if the new code is made subject to such option by the copyright
38+
* holder.
39+
*/
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package org.glassfish.samples.locking.optimistic;
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import javax.persistence.metamodel.SingularAttribute;
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import javax.persistence.metamodel.StaticMetamodel;
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/**
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* @author Arun Gupta
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*/
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@StaticMetamodel(Movie.class)
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public class Movie_ {
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public static volatile SingularAttribute<Movie, Integer> id;
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public static volatile SingularAttribute<Movie, String> name;
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public static volatile SingularAttribute<Movie, String> actors;
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}

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