Example of migrating an application from EJB 1/2 to Spring +
Hibernate.


Version history:

0.1   "Legacy" EJB application

0.2   Spring is introduced and used to replace the 
      stateless session bean

0.3   Hibernate is introduced and used to replace the entity
      bean, the whole EJB module now must be removed as it
      is empty


There are IntelliJ IDEA and Eclipse project files, so you
should be able to browse the project without building it.


To build and run the application, you have to

0. have Maven 2 and Java 5 or higher

1. download, install and start JBoss application server (I
used version 4.2.0 GA)

2. configure the JBoss deployment directory in person-ear/pom.xml : 

  <outputDirectory>/home/thrantal/work/jboss-4.2.0.GA/server/default/deploy/</outputDirectory>

3. configure the JBoss library locations in
ejb-migration-example/run.bash (which is unix only)

4. Configure the JBoss embedded HSQLDB to run in the mode 
accepting remote connections, e.g. in file

  /home/work/jboss-4.2.0.GA/server/default/deploy/hsqldb-ds.xml

select

 <connection-url>jdbc:hsqldb:hsql://localhost:1701</connection-url>

5. build, deploy and test the application using maven:
    cd ejb-migration-example
    mvn -Dmaven.test.skip=true clean install  # tests require the server to be
    mvn test                                  # running, a chicken-egg-problem


You can then insert data to the PersonEntity table by using
the HSQL Database Manger Tool bundled with JBoss

  http://docs.jboss.org/jbossas/getting_started/v4/html/dukesbank.html#X-22013

e.g. 
  INSERT INTO personentity (id, username, lastname, firstname)
    SELECT MAX(id) + 1, 'ftest', 'Testing', 'Frank' 
    FROM personentity;
  commit;
  SELECT * FROM personentity;

and try searching the data with the command-line Bash
script:

  cd ejb-migration-example/
  ./run.bash Frank

This should find the inserted person and output something
like 

  PersonEntity:1002, Frank Testing (ftest)