In this case, unfortunately, SO didn’t tell us much that we didn’t know already (and indeed the tool we ultimately chose was not mentioned in any answer). However, I’m posting our experiences here, as they might be helpful to others later on. We (quickly) evaluated the following installer tools, mostly by looking at their websites … Read more
Abstract beans in Spring are somewhat different from abstract classes. In fact, abstract bean in Spring doesn’t even have to be mapped to any class. Take this as an example: <bean id=”dao” abstract=”true”> <property name=”dataSource” ref=”dataSource”/> <property name=”someHelper” ref=”someHelper”/> </bean> <bean id=”fooDao” class=”FooDao” parent=”dao”> <property name=”fooHelper” ref=”fooHelper”/> </bean> <bean id=”barDao” class=”BarDao” parent=”dao”> <property name=”barHelper” ref=”barHelper”/> … Read more
One word: libraries. Java has an vast array of excellent libraries for solving most of the common problems one needs to solve when developing enterprise applications. In many cases, there is more than one good choice for addressing a particular need, and oftentimes those libraries are free and open source under a business-friendly license. Some … Read more
Working code based on the accepted answer. public class CustomHttpServletRequestWrapper extends HttpServletRequestWrapper { private static final Logger logger = Logger.getLogger(CustomHttpServletRequestWrapper.class); private final String body; public CustomHttpServletRequestWrapper(HttpServletRequest request) { super(request); StringBuilder stringBuilder = new StringBuilder(); BufferedReader bufferedReader = null; try { InputStream inputStream = request.getInputStream(); if (inputStream != null) { bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); char[] … Read more
If I’m using an ORM like JPA2 – where I have my entities that are mapped to my database, should I still be using a DAO? It seems like a lot more overhead. It is. And clearly, Java EE doesn’t encourage using the DAO pattern when using JPA (JPA already provides a standardized implementation of … Read more
You can use hbm2ddl from Hibernate. The docs are here.
Check out EJB 3.1 @Asynchronous methods. This is exactly what they are for. Small example that uses OpenEJB 4.0.0-SNAPSHOTs. Here we have a @Singleton bean with one method marked @Asynchronous. Every time that method is invoked by anyone, in this case your JSF managed bean, it will immediately return regardless of how long the method … Read more
The language itself should be simple to understand. There are not as many language constructs, everything possible is done in libraries. The libraries will take some getting used to. The two most critical things you can do to hit the ground running is: 1: Use NetBeans or Eclipse and hit ctrl-space ALL THE TIME. It’s … Read more
Sun/Oracle is providing a java-ee.jar – which contains only the Java EE APIs and does not contain any method bodies – that you can use to compile against it (from the java.net maven repository): For Java EE 5: http://download.java.net/maven/1/javaee/jars/javaee-api-5.jar For Java EE 6: http://download.java.net/maven/2/javax/javaee-api/6.0/javaee-api-6.0.jar If you want to execute some Java EE code, you’ll need … Read more
Given the table definition: CREATE TABLE webuser( idwebuser SERIAL PRIMARY KEY, … ) Use the mapping: @Entity @Table(name=”webuser”) class Webuser { @Id @SequenceGenerator(name=”webuser_idwebuser_seq”, sequenceName=”webuser_idwebuser_seq”, allocationSize=1) @GeneratedValue(strategy = GenerationType.SEQUENCE, generator=”webuser_idwebuser_seq”) @Column(name = “idwebuser”, updatable=false) private Integer id; // …. } The naming tablename_columname_seq is the PostgreSQL default sequence naming for SERIAL and I recommend that you … Read more