About persist
Storing JPA Entity Objects
Explains how to use JPA to store (persist) entity objects in the database.... in the database either explicitly by invoking the persist persist(entity) EntityManager's method Make an instance managed and ...
JPA Persistence Unit
Explains how to define a JPA persistence unit in the persistence.xml file. 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. ...
JPA Persistable Types
Explains how JPA manages types, including entity classes, embeddable classes, primitive types, wrappers, string, date, enum, collections and maps.... . ORDINAL EnumType.ORDINAL enum constant Persist enumerated type property or field as an integer. See JavaDoc ... . STRING EnumType.STRING enum constant Persist enumerated type property or field as a string. See JavaDoc Reference ...
Working with JPA Entity Objects
Explains the entity object lifecycle and the persistence context.... persisted to the database via an EntityManager’s persist persist(entity) EntityManager's method Make an instance managed and ...
Database Connection using JPA
Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction. Working with the Java Persistence API (JPA) consists of using the following interfaces: This page covers the following topics: Overview EntityManagerFactory EntityManager EntityTransac ...
What is the Java Persistence API (JPA)?
The Java Persistence API (JPA) is a standard API for accessing databases from within Java applications. The main advantage of JPA over JDBC (the older Java API for interacting with databases) is that in JPA data is represented by classes and objects rat ...
Step 2: Entity Class and Persistence Unit
Explains how to define a JPA entity class and a persistence unit (persistence.xml) in a NetBeans Spring MVC web application project. To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node (in the [Projects] window) and selecting New > Entity Class ... (or New ...
Step 2: Entity Class and Persistence Unit
Explains how to define a JPA entity class and a persistence unit (persistence.xml) in a NetBeans Java EE 6 web application. To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node (in the [Projects] window) and selecting New > Entity Clas ...
Entity Management Settings
Explains settings and performance tuning of JPA entities in ObjectDB, the fast Java object database for JPA/JDO.... ref = "weak" level2 = "0mb" /> <persist serialization = "false" /> <cascade-persist always = "auto" on-persist = "false" on-commit = ...
Step 2: Entity Class and Persistence Unit
Explains how to define a JPA entity class and a persistence unit (persistence.xml) in an Eclipse Spring MVC web application project. To store objects in an ObjectDB database using JPA we need to define an entity class: Right click the project node (in the [Package Explorer] window), select New > Source Folder , enter src/main/java as Folder ...
