JPA without persistence.xml

Question

I\'m trying to get started with using Guice Persist and JPA, which recommends using configuration via persistence.xml. Coming from a native Hibernate background where confi

Answer 1

Depending on what you want to achieve and in what context (ApplicationServer vs CLI, CMT transactions vs EntityTransactions), it may be possible to use JPA without a persistence.xml. I did this in a CLI Java application, where I had different databases with the same structure. For that I constructed the EntityManagerFactory manually.

PS: The config file is there to make your life easier, so if you can, just use it.