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Where do I put persistence XML?

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Where do I put persistence XML?

If you package the persistent unit as a set of classes in an EJB JAR file, persistence. xml should be put in the EJB JAR’s META-INF directory. If you package the persistence unit as a set of classes in a WAR file, persistence. xml should be located in the WAR file’s WEB-INF/classes/META-INF directory.

What is persistence XML file?

The persistence. xml file is a standard configuration file in JPA. It has to be included in the META-INF directory inside the JAR file that contains the entity beans. The persistence.

What is persistence unit JPA?

A JPA Persistence Unit is a logical grouping of user defined persistable classes (entity classes, embeddable classes and mapped superclasses) with related settings. Defining a persistence unit is optional when using ObjectDB, but required by JPA.

How do I use persistence xml?

So, let’s take a look at JPA’s optional configuration elements and what they enable you to do.

  1. Provide a description of your persistence unit.
  2. Specify the managed classes included in your persistence unit.
  3. Reference a mapping file.
  4. Use a specific persistence provider.
  5. Reference a datasource.
  6. Activate the 2nd level cache.

Which of the following are elements in persistence xml?

The persistence-unit element consists of the following attributes.

  • Attribute : name. This attribute is required.
  • Attribute : transaction-type. This attribute can have the following values.
  • ,

What are three types of XML documents?

Document Prolog Section

  • XML declaration.
  • Document type declaration.

Why do we need persistence xml?

The Java Persistence XML configuration file allows you to define a Persistence Unit configuration that you can later bootstrap using Java EE or Spring. Knowing all the persistence. xml file configuration options is very important as it allows you to address a great variety of mapping requirements.

Can we create sample XML from XSD?

To generate an XML instance document based on the XSD file In the XML Schema Explorer, right-click the PurchaseOrder global element, and then select Generate Sample XML.