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POHow do I prevent EclipseLink (JPA 2.0) from clearing my database/table?
 

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  1. POHow do I prevent EclipseLink (JPA 2.0) from clearing my database/table?
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    <p>I'm using EclipseLink (JPA 2.0) on Netbeans 7.0 with a MySQL database - which I configured according to <a href="http://netbeans.org/kb/docs/javaee/jpa-eclipselink-screencast.html" rel="nofollow">this screencast</a>. But sometimes when I persist an Object/Entity my table get's cleared before that object persists, and I get a table with only this object (like it has been cleared). I'm only simply adding new entries in (populating) the database.</p> <p>How can I prevent this?</p> <p>Here's my code:</p> <pre><code>Movie movie = new Movie( jsondata.path("Title").getTextValue(), jsondata.path("Year").getValueAsInt(), jsondata.path("Genre").getTextValue(), jsondata.path("Plot").getTextValue(), jsondata.path("Poster").getTextValue()); persist(movie); </code></pre> <p>My persist() function:</p> <pre><code>public static void persist(Object object) { EntityManagerFactory emf = Persistence.createEntityManagerFactory("AllmoviesPU"); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); try { em.persist(object); em.getTransaction().commit(); } catch (Exception e) { e.printStackTrace(); em.getTransaction().rollback(); } em.close(); } </code></pre> <p>My Movie object/entity:</p> <pre><code>@Entity public class Movie implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String title; @Column(name="MOVIEYEAR") private int year; private String genre; private String synopsis; private String image; public Movie(String title, int year, String genre, String synopsis, String image) { this.title = title; this.year = year; this.genre = genre; this.synopsis = synopsis; this.image = image; } public Movie() { } /* ... Getters and Setters stuff ... */ } </code></pre> <p>My persistence.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"&gt; &lt;persistence-unit name="AllmoviesPU" transaction-type="RESOURCE_LOCAL"&gt; &lt;provider&gt;org.eclipse.persistence.jpa.PersistenceProvider&lt;/provider&gt; &lt;class&gt;allmovies.data.Movie&lt;/class&gt; &lt;properties&gt; &lt;property name="javax.persistence.jdbc.url" value="jdbc:mysql://123.123.123.123:3306/psanta_allmovies"/&gt; &lt;property name="javax.persistence.jdbc.password" value="XXXXXX"/&gt; &lt;property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/&gt; &lt;property name="javax.persistence.jdbc.user" value="psanta_allmovies"/&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;/persistence&gt; </code></pre>
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    1. USpedrosanta
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      1. POHow do I prevent EclipseLink (JPA 2.0) from clearing my database/table?
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      1. POHow do I prevent EclipseLink (JPA 2.0) from clearing my database/table?
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    1. COHave you posted this question before somewhere else? Complete with (working!!) DB login settings *en public*? Couldn't it just be some joker which truncated your table from time to time? Try to change your password and don't post the DB connection details in the world wide web...
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      1. POHow do I prevent EclipseLink (JPA 2.0) from clearing my database/table?
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