Conversion of Java Objects to XML for OptaPlanner Input

Question

I need to convert java objects being imported from the dB to the XML so that I could user it with Xstream in OptaPlanner. Is there any alternate way other than Hibernate to access the data from the dB. How to add more attributes for job scheduling.

Answer 1

optaplanner-core works based on POJO's (javabeans). It's oblivious to the fact that in optaplanner-examples, those POJO's are being read/written to XML files by XStream (and it doesn't care). Similarly, you can use any other technology to store those POJO's:

• JPA (for example Hibernate-ORM, OpenJPA, ...) to store them into a database
• JDBC to store them into a database. Note: JDBC works with SQL statements, so you 'll need to manually map SQL records to POJO's.
• JAXB to store them in XML
• XStream to store them in XML (as the examples do it)
• Infinispan, mongodb, ... to store them in to a big data cloud. Note: might require manually mapping too, unless you use hibernate-ogm
• ...

OptaPlanner doesn't care, so it doesn't restrict you :)