PersistenceContext kérdés...

Igen, a persitence unit megvan a persistence.xml-ben:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" 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_1_0.xsd">
	<persistence-unit name="WebBookCatalog">
	    <jta-data-source>java:PostgresDS</jta-data-source>
		<class>entity.webbookcatalog.PrintedBook</class>
		<class>entity.webbookcatalog.Person</class>
		<class>entity.webbookcatalog.Location</class>
		<class>entity.webbookcatalog.Lang</class>
		<class>entity.webbookcatalog.Genre</class>
		<class>entity.webbookcatalog.EBook</class>
		<class>entity.webbookcatalog.Book</class>
		<class>entity.webbookcatalog.Attachment</class>
	   <properties>
       </properties>
	</persistence-unit>
</persistence>

A pool-on a data source-ot érted? Elvileg az is be van állítva rendesen, induláskor nem is ír rá hibát a JBoss:

<datasources>
  <local-tx-datasource>
    <jndi-name>PostgresDS</jndi-name>
    <connection-url>jdbc:postgresql://127.0.0.1:5432/webbookcatalog</connection-url>
    <driver-class>org.postgresql.Driver</driver-class>
    <user-name>postgres</user-name>
    <password>foobar</password>
        <!-- sql to call when connection is created.  Can be anything, select 1 is valid for PostgreSQL
        <new-connection-sql>select 1</new-connection-sql>
        -->

        <!-- sql to call on an existing pooled connection when it is obtained from pool.  Can be anything, select 1 is valid for PostgreSQL
        <check-valid-connection-sql>select 1</check-valid-connection-sql>
        -->

      <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
      <metadata>
         <type-mapping>PostgreSQL 8.0</type-mapping>
      </metadata>
  </local-tx-datasource>

</datasources>

Köszi mindkettőtöknek, beleírtam a providert, ezt tényleg kifelejtettem...

Viszont a probléma még mindig nem oldódott meg, ugyanúgy NullPointerException-t dob ugyanott. Az AS amúgy JBoss 5.

Van egy JSP, amin egy form van, ez hívja a szervletet:

<form action="AddBookServlet">
<table>
	<tr>
		<td>Title:</td>
		<td><input type="text" name="title" /></td>
	</tr>
	<tr>
		<td>Edition:</td>
		<td><input type="text" name="edition" /></td>
	</tr>

	<tr>
		<td colspan="2"><input type="submit" value="OK" /></td>
	</tr>
</table>
</form>

A szervletben pedig a doGet() és doPost() metódusokból hívom a közös feldolgozó processRequest()-et, itt példányosítom a beant:

public class AddBookServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	private BookBeanLocal bookBean;
       
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
         
        String title = request.getParameter("title");
        Short edition = Short.parseShort(request.getParameter("edition"));
                
        String result="Book successfully created";

        Book book = new PrintedBook();
        bookBean = new BookBean();
        
        book.setTitle(title);
        book.setEdition(edition);
        
        bookBean.addBook(book);
        
        request.setAttribute("addBookResult", result);
        request.getRequestDispatcher("addBook.jsp").forward(request, response); 
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		processRequest(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		processRequest(request, response);
	}

}