Switch propertie from a JPA persistent unit at runtime

Question

Hi,
I have a mysql database mapped through JPA (using oracle toplink bundled in Netbeans6.1) an I want to change the "toplink.jdbc.url" propertie of the persistence unit declaration at runtime of my app, is this possible? Getting more into the problem: my app will run in different networks and I cannot leave the propertie "toplink.jdbc.url" static, so in my app I have a swing dialog to change the database server IP and I store it in my own properties file (file_name.properties), so I want my java code to read that properties file and set the correct "toplink.jdbc.url".

Answer 1

Hello,
I am using Hibernate and Here are some of the properties in the PersistenceUnit.
I have used your way of Overriding the properties by passing the Map into createEntityManagerFactory method.
<property name="hibernate.connection.username" value="root"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.password" value="r3dm0u53"/>
propertiesMap.put("hibernate.connection.password", "password");
entityManager = javax.persistence.Persistence.createEntityManagerFactory("persistencePU", propertiesMap).createEntityManager();
But it is not working the application is still running on the values that it has in the PU file.
What to do now? any idea?